Platinum Recovery From Automotive Catalytic Converters Part 1of2

Platinum Recovery From Automotive Catalytic Converters Part 1of2


hello YouTube welcome to my youtube channel I’m sweet tips I’ve got an assortment of catalytic converters here and what we’re going to be doing is making a video on how to extract that platinum group metals from these Converse before I do that I’d like to go over a little bit of information that I’ve learned about these converters because the first thing is refining platinum group metals is difficult it’s not easy to do it almost requires a chemistry degree because there’s so many different variables that have to be dealt with when you’re working with these metals the dangers associated with getting the platinum and palladium metals into solution are just not worth the the return that you can expect out of these catalytic converters there’s not going to be much metal at all take the time to look up the word platen OSIS PL a TI n o s is platen OSIS and read those symptoms before you dive into trying to do some catalytic converters of your own my goal was to get enough experience so that I could process these catalytic converters and do my stockpot and then once I get those done I probably won’t mess with the platinum group metals ever again until it comes time to do my stock but it’s just too much danger involved too much risk for injury and my health is more valuable to me than the metals that I expect to recover from these catalytic converters this one here and I want you to look at this one carefully this’n might be okay I guess let me pick one out here that this should be okay here’s one this one here you see how shiny and bright that metal is with a little bit of rust on it and then there’s some rust down in there on the substrate and what I think has happened here is the what thieves will do is they’ll take these catalytic converters whole like this with the casing on them and then pass an acid solution through the substrate inside here extract most of the platinum and then put them up to be sold on eBay okay I’ve got a few more here this one should be okay I’m not to cut that open I don’t know there’s some these most of these have probably been already processed before I got them I bought these on eBay several years ago and that’s probably gonna have some metal in it I had to cut the casing away on that one but like this one here bright shiny clean looking substrate that’s probably already had the coating or the platinum taken from it so it’s just the way there that’s the nature of this deal here okay these over here these are metal substrate in other words there’s a metal it’s not ceramic down there nerds of people piece of metal you can see how it’s got a spiral pattern to it and those you’ve got to process with the the metal casing one otherwise get a press maybe and press that out of there but I’m just gonna put these right in a bucket process and just like they are so these are metal casing and metal substrate this part here is metal it’s not ceramic over here these are metal casing with a ceramic substrate here I have some catalytic converter beads I bought these on the internet on eBay I think I paid a couple hundred bucks for that bottle right there and then in here I’ve got a crushed up catalytic converter that my friend Rick gave me thank you Rick and so we’ll go ahead and process that and that’s a rundown of all the catalytic converter items that I have here that I’m gonna try to process and let’s get to it right now here’s my chop saw with the saw blade removed and a metal cutting wheel installed this configuration works pretty good for opening up these cats but notice that there’s a lot of dust flying around so a protective mask is required you in this shot I use a handheld angle grinder to remove the metal casings from the substrate you you now this part of the project took quite a while by an hour and a half you cut all these cases off there’s a lot of dust flying around hard on the machines this one had a little bit of a different configuration I decided to just go ahead and chop one end of it off and then there was some metal birds there from the cutting wheel so I bent them down and then I take it over to the I bent them out of the way there take it over to the the wood blocks here and just try to beat it out with a hammer doesn’t come out real easy those things are pretty tough [Applause] this one here was already open at both then so I just decided to break it apart get it out that way they still don’t come out very easy [Music] now this one was flanged on one end so I just put it on some wooden blocks there and poked it out with the hammer [Applause] each catalytic converter was different but they were all a pain in the butt to get out of their route casings [Music] this one had a thick steel casing with a very thick steel flange that I had to cut through this chop saw really came in handy for this one this is all of our catalytic converter material that I’ve processed at this point so far over here we’ve got in the front box there those are those metallic substrate catalytic converters and I’ve decided not to do those I don’t know I’m not sure what to do with those but I’m gonna skip those and I would probably just sell them on eBay and behind there is the scrap from these shells the casings the metal casings that we cut away from the substrate over here I’ve got the catalytic converter beads I’m gonna process this I’m going to process those separately and that little bucket there right behind the catalytic converter beads and then over here I’ve got all my substrates that I cut out of the metal casings and I’m gonna put them in these buckets right terror behind the substrates I’ve got two 5-gallon buckets in there I’m go ahead and put my mask on and I’m gonna set all that up right now [Music] [Music] after pouring these beads into that book and I seen it was about two-thirds full so I decided not to do it in its own separate bucket and just end it to the other catalytic converter material [Music] okay in this clip I’ve moved the containers outdoors as you can see it’s raining there I had my mascot to protect me from those hydrochloric acid fields I put one gallon of 31 percent hydrochloric acid into each bucket [Music] then I add water about a gallon or so to each bucket maybe a gallon and a half so it makes about a 50/50 solution there of water and hydrochloric acid and then I just kind of eyeball it and pour in about a cup of bleach into each container that’s just regular household bleach one cup into each container then I loosely fit the lid on there as you can see cover it up and wait for it to leach this is the following day I’ve got my little 3m p95 mask on to protect me from the chlorine gas and what I’m going to do here is go ahead and check the leach as you can see when I pull this cover off it’s going to have a nice orange tint to it which means I’m getting metals leaching out of the catalytic converters here I’m going to draw a little sample so we can test some of that solution and then what I’ll do is I want to add another splash of bleach to each container maybe about 30 40 ml each or so just enough to produce some little chlorine gas what I’ll do is I’ll come out every day for the next couple of weeks and I add little small splashes of chlorine gas to each container so that I can keep it saturated with chlorine gas to set to leach out those metals this is a sample from our catalytic converter leach but someone will filter paper here then I’m going to test it with some stannous chloride [Music] see if we got metal going solution and there you see it got a nice stain there which means we’re getting metals going into solution this is about a minute after I took that test if you look at is turning green with a slight hint of orange to it so that means a palladium and a little bit of platinum going into solution you you [Music] this is day two of the leaching process and rather than just pouring the bleach on top of the solution they’re trying to find a way to get that bleach down to the bottom of those leaching buckets so what I did I took a piece of PVC tube there a rigid PVC tube and inserted a soft piece of tubing inside of it and then pushed it down into the bottom of the bucket and then here I’m removing the rigid piece of tubing and what I’m gonna do is I’m gonna fill a syringe that just fits on the end of that tubing I’m gonna fill that syringe with some household bleach and then inject it down into the bottom of the bucket I noticed that when I pour the bleach in I get a bubbling fizzing reaction on the surface of the liquid but I wasn’t sure if that that Corrine was reaching the bottom piece is down in the bottom of the bucket there so I want to try this experiment to inject the bleach down into the bottom of the bucket to see if I can get the more contact with the substrate that has the platinum group metals on it if I injected that the bleach down into the bottom of the bucket so that’s what this experiment is all about and as you can see I already did it on the other bucket I did it ahead of time to make sure everything was gonna go okay and it was my spew a bunch of junk back out at me through that tube and as you can see it worked out pretty good so this is how I’ll be adding the bleach from now on to these buckets rather than just pouring it into the top I don’t know if this makes a difference or not I think you can just go ahead and add the bleach from the top and be okay with it but I just wanted to get some more contact between the bleach and the Platinum bearing pieces down in the bottom of those buckets this is day two of the leech and I just added a little bit more eye bleach to the leeching buckets out there and I got a sample of the solution from the leeching buckets day two of the experiment put a drop on nine piece of filter paper here and then my hats with stannous chloride and we get a stain it’s still pretty light a little darker than it was yesterday but we’re getting platinum group metals going into solution here here’s yesterday’s test here’s today’s test it’s a little bit dark today I touch the edge of this with distance that’s why you got in the dark it’s very faint on this one and this was getting a lot darker so that he’s working relegion metals out of the solutions [Music] this is day six of the leaching process I’ve been adding bleach this way from the past six days once a day every day and today I decided to add a couple of spoons of sodium chlorate to try to speed the process along I don’t think this is necessary the bleach will do the trick if you just let it leach in there long enough but I decided to add the sodium chlorate to try to speed things up when sodium chlorate is added to a hydrochloric acid solution chlorine gas is formed and so I decided to add a little bit of sodium chlorate here to each bucket so I could try to speed things up just wanted to show you right quick what the temperatures are inside these buckets 61 Fahrenheit 16 degrees Celsius 16 Celsius 60 point five degrees Fahrenheit it’s been about one week since I started doing the leaching I’ve been adding bleach every day I started out of the sodium I started adding sodium chlorate about two or three days ago to try to speed things up when you give Stannis to chloride test hirsute we got going in the solution and there we’re getting a pretty nice dark steam there now it’s like it’s brown green a little bit of orange in it so definitely get some platinum group metals going into solution be ready to go ahead and drain that solution off filter it and process it here very shortly okay this is a status test for the other bucket there [Music] and that one’s much lighter than the first test-1 buckets got a little bit more going on in it than the other one does I think it’s because some of the catalytic converters had already been leached out when I put them in there but we got platinum group metals going into a solution in both buckets this is day 15 of the leach I quit adding bleach because the volume of the liquid was increasing and so I’ve just been adding sodium Qui every day to the leaching buckets this is day 17 of leech and what I’ve decided to do is go ahead and set up a filter rig and filter out these solutions so I can go to the next step of the process what I’ve got here is a five-gallon bucket of couple of slots in it so I can fit this thick glass rod in here and then I’m gonna use that as a prop to put my strainer in here what I’ll do is I’ll line the bottom of this now with some filter papers your just coffee filters now we’ll take this rig out to the the leeching buckets and we’ll go ahead and filter this the solution through this filter that I have set up here okay the Platinum bearing solution gets trapped in these small channels in sight these ceramic substrates so what I’m doing is I’m using a little bit of hydrochloric acid to rinse as much of the Platinum bearing solution out of the substrates that I can [Music] you here I’m going to add some pH up for swimming pools which is sodium carbonate and the reason I’m adding this is to neutralize a little bit of that acid before I go to the zinc step if I leave that solution highly acidic it’ll just eat up all the zinc needlessly so I’m just adding a little sodium carbonate here to try to neutralize somebody acid before I add the zinc to cement out the platinum metals here I’m getting the solution ready to transfer inside into my fume hood you can see there’s quite a bit of chlorine being given off still from that solution so what I’m going to do is I’m going to put a lid on it and carefully walk it into my fume hood and get it in the fume hood as quickly as possible to prevent a bunch of that chlorine gas getting all over my shop next step in the process is to precipitate out the metals on that solution that we extracted from the catalytic converters with zinc this is 50 pounds of zinc pieces that I bought from a website called roto metals and their scraps left over from the projects they do with strips of zinc this pure zinc metal what I’m going to do here is cut it up with a pair of shears and make some small pieces so we can cement out the platinum group metals out of that solution [Music] now I’m going to transfer a little bit of the solution into this five liter beaker here so we can add some zinc to it and start cementing out the platinum group metals [Music] now I’ll add some of those strips that sink to the solution here so we can assume meant out the platinum group metals [Music] the zinc metal is highly reactive much more so than the platinum group metals it’s higher up on the list of the reactivity series of metals so what happened here is as that zinc goes into solution from the acid the platinum group metals will cement out of solution as a fine black powder [Music] in this shot I’m adding a piece of sheet zinc that was used partially used in a previous reaction cementing out some palladium from my Lady of video and now this is two times normal speed to see how fast it done devours that piece of zinc [Music] in the refining community using a more reactive metal such as zinc to precipitate out a less reactive metal such as the platinum group that we’re working with here that action is called cementing or cementing out the platinum group metals with zinc I’ve got a lot of solution to react with that zinc so I’m gonna move this up out of the way [Music] and then I’m gonna fill this other beaker up and start another reaction in this and this beaker I’m only filling these about halfway for so that I don’t overflow the beaker that’s a little under half there [Music] now I’ll go ahead and add some zinc to this one actually I’ll I have a whole sheet that this just bet it in half no you shouldn’t cut it up it’s gonna all gonna get dissolved anyway when two reaction with that platinum in the acid solution what will happen is the zinc will trade places with the platinum and palladium the zinc will go into solution and the platinum group metals will come out of solution is a flying black powder you can see here the little black flecks a meddler coming up off the sink that means that the black and blue battles are coming out of solution and the sink is going in the solution what we in the refining area called cementing out the platinum this was still go in here it’s kind of wild to go board start set showing the medals the zinc has gone into solution now the solution looks a little bit greenish colored and there’s a black powder coating the bottom of each beaker I’ve still got a few pieces of zinc left here it’s been about two or three hours since I added the zinc to these two solutions this one’s looking kind of dark this one’s looking kind of greenish gray color what I’m going to do is I’m going to add some hydrochloric acid let’s see if I can get these solutions to clear up a little bit [Music] you put a couple more pieces of zinc in here just the action to continue [Music] this one looks okay I guess it’s got some pieces of zinc in it still [Music] I’m gonna put some hydrochloric acid in this one as well see if I can burn off the rest of that zinc [Music] I had a few more pieces of zinc here to try to get that solution to clear up these solutions have been allowed to sit overnight this one’s cleared up and now this has gotten turned black so I’m gonna add a little bit of hydrochloric acid to this solution over here and then I’m gonna add a few more pieces of zinc to it not very much maybe 20 30 ml then throw in a few pieces of zinc and hopefully this will clear on I’m gonna allow this to settle for a little while see if I can get this solution to clear up like this one did this view is leaking up underneath the beaker I’m going to pick it up and show you the black powder that’s accumulated on the bottom of it that’s our platinum group metals that have cemented out of the solution onto the zinc metal I’m gonna get this acidic waste solution off my platinum group metals in powdered form there I that beaker I’ve got this tube full of water what I’m gonna do is put my thumb over one end and then submerge the other end inside the solution in the beaker down and they just let my thumb off down here let it sign out you I’ve got two liters of hot tap water I’m sitting add this to the speaker trying to get the reaction to stop see if this black powder will settle out real good for me two liters of tap water here [Music] I don’t know if you can see it or not on the camera but this beaker here is starting to clear up since I’ve added the hydrochloric acid and the few extra pieces as ink as soon as it clears up but I’ll do the cycling this off and add some tap water and try to get it to settle out so we get the black powder out of there I’ve got this second beaker to clear up pretty good here I put some hydrochloric acid in there a few more pieces of zinc I think you can see down there it’s still kind of reacting a little bit but all the black powder is settled so I’m gonna go ahead and cycling this out now okay to siphon this out I’m going to fill this tube full of water and then what I’ll do is hold my thumb over one end stick the other end down into the solution that I want to siphon out and then let my thumb off I’ve got this tube for water it’s tap water it doesn’t have to be distilled water I’m going to go ahead while I’m at it but cycling this beaker out as well got the solutions out of both of these beakers siphoned out now what I’ll do is go ahead and get the contents of this beaker and combine it with this one right here right now [Music] now I’ve got this speaker freed up go ahead and pour the rest of the solution in the bucket into this beaker [Music] I’m gonna fish through this one and get out and he done dissolved pieces of zinc and atom to the speaker you you all right now what I’m going to do is take the medal that I have cemented out with zinc transferred into this tall beaker you you right now I’ll set this this is our precipitated platinum group metals from the zinc set this back here out of the way and as you can see over here the the other solutions starting to dissolve the zinc and we’ll get that’s the previous pieces of zinc that was in this left over I took the big hunks out of here put it in here so it can start precipitating out the metals out of this platinum solution bring this beaker back up front [Music] go ahead and add some pieces of Zing’s and small pieces that beakers kind of pull so I don’t want to put too much in at once and it could overflow here on me so it’s going to put a few pieces in to get this thing started and of course we get in a media reaction there they’ve been about 15 20 minutes since I added those pieces of zinc to this solution when I try to add a whole piece here hope it doesn’t boil over or didn’t slow think it’ll be all right [Music] here you can see the importance of keeping this thing covered that reaction is causing that tube is up and droplets are condensing on the cover there and drop them back into the solution I didn’t have this cover that stuff but I’ll be going into my few board right now it took less than about five minutes to dissolve that piece of zinc in there so now I’m gonna go ahead and add another piece here a little bit bigger piece this time [Music] to give it quite a vigorous reaction from it but as this zinc gets consumed the reaction will calm down as the acid gets consumed consumed you you okay and that last bit of footage there took about 15 minutes to completely dissolve that piece of sink I stuck in there this is a little thicker I’m gonna go ahead and add it now and as you can see by that reaction that’s calmed down quite a bit most of the assets been used up from dissolving the other two pieces of zinc you see some black particles floating around in there that’s our platinum group metals coming out of solution as the sink goes into solution it’s been about 15 minutes since I added that last sheet of sink and as you can see the color is changing to a greyish green color the pink and red and orange colors going away and what that means is our platinum group metals are cementing out or precipitating out on those sheets of zinc metal that I’ve added that’s what we wanted to do liquid that we’ve got leaching out here I’m gonna go ahead and take care of the next bucket of it right now but put my mask on proceed with that but this is pretty much the exact same thing as as with the first bucket [Applause] [Music] [Music] [Music] [Music] alright here’s my solution from the second bucket it’s got a little bit of cloudiness to it so what I’m going to do is filter it ahead of time make the damn communist era II [Music] [Music] it’s taking me several hours to get this filtered go ahead and put the amount of liquid that I have filtered into the big beaker and start cementing it out with some zinc [Music] I’m just gonna take the zinc out of here we’ve got a bunch of black material on it and I’m gonna move it over to this beaker over here should start reacting right away okay this piece of zinc right here had a passive layer of precious metals on it preventing the solution from getting to the zinc underneath and now let’s start eat through that and getting a nice from the action going here we’re trying to get this solution here to clear up I’m going to add a little bit of hydrochloric acid and then I’m gonna put some pieces of zinc in there try to get the solution to clear up what I want to do here is show the temperature it’s well above ambient it’s on 124 degrees Fahrenheit 51.2 Celsius this is an exothermic reaction and all these beakers get that hot when I do this zinc reaction I’ll go ahead and add another sheet of zinc to the beaker here all right I’ve just about got the entire solution filtered here I’ve been filtering this solution for about six hours it’s got a lot of fine particulate in it it loads the filter paper up and then it takes a long time to filter everything out over here I’ve got my two beakers that’s cementing out the platinum metals with zinc this one’s kind of clearing up a little bit I got sink in there with a little height before Cassidy this one was allowed to sit all night it’s real black so what I’m gonna have to do is add some more acid [Music] and a few pieces of zinc to it try to get it clear up not too much we got some faeces ink here throw them in hopefully that’ll clear that solution up for me in a little while finally got all that solution filtered out go ahead and add it to this clean beaker here it’s pretty clear there’s it’s gone again I guess after the beaker and start putting zinc in so we cement out tevia metals now I’ll start adding a few pieces of zinc here [Music] get it started like that the one thing that I’ve noticed here the less concentrated the solution is the more tenancy it has to form this colloidal suspension of metals that stay suspended in the liquid and does not settle want to do a little review here the speaker here has got the solids that have been precipitated with sink from the first bucket I added some my hot tap water trying to get that to settle out but as you can see I’ve got a colloidal suspension in there but most of it settled down to the bottom this beaker here has got contents from the second bucket that we filtered out from the leaching this one does as well and it’s kind of clearing up this one’s starting to clear up a little bit but these were less concentrated solutions so they’re gonna tend to stay suspended like this and this is the most recent beaker here but I just added zinc to after filtering out the fine particulate so I’ve got all four of these beakers now with my precious metals in them I’m gonna go ahead and siphon these off and try to get all the metals into this beaker right here it’s fuckin down here and I see if I collect all the metals on all three of these beakers into this one beaker and a tube of water here full of water I put my thumb over one end and just go ahead and siphon each of these out [Music] you this is the solution that I siphoned off of the beakers it’s obviously got some precious metals in it I’ll just cover it up and let it settle out for a couple days and then siphon off the waste and recover that we’ve met a lot of it but from now what I’m going to do is go ahead and pick through and get all the pieces of zinc out of these two here you you I don’t look you can see it on camera here or not but the level of the black powder is about right here in this beaker I’ve collected everything so it’s about a quarter of an inch deep or so as soon as this reaction is complete I’ll siphon it off into my waste bucket down here and then I’ll add the metals that precipitate out with the zinc into this main beaker and then we’ll go from there the speaker here and had long enough to react but go ahead siphon that off into the way sprocket I’m just kind of making this up as I go we’ve got a bunch of pieces of zinc left in here with some precious metals on it now there was a little bit of black sediment down there try to drain that into my main beaker here that black powders the precious metals now what I’m going to do is add some hydrochloric acid yes and try to burn out all the rest of the residual zinc that’s in there and just let it settle okay I think I’m going to conclude part one of the video here I’ve got the bulk of my black powder in this beaker it’s got some hydrochloric acid in it I’m gonna try to burn off all the zinc and then I’m gonna have to rinse it real good to get the zinc out of there this is a bunch of zinc that’s left over from the reactions and then I got a bunch of waste down here that’s gonna have to be treated probably about three four gallons after that settles out what I’ll probably do with that this sink to this bucket just let it react and then siphon off the waste and add any precious metals it settles out into the bottom of this bucket to my stockpot I’ve allowed the solution to settle overnight here this has got our mix black platinum group metals in it sitting in some hydrochloric acid to rid it of zinc so now what I’m going to do is I’m going to go ahead and siphon this off into my waste bucket down here here hold water I’m going to stick my thumb over one end and then stick the other end into the solution that I want to siphon off and then just let my thumb off down here to my waste plug it – this liquid off the precious fellows in this beaker this is our platinum group metals it’s been the soaking in hydrochloric acid it’s gonna have some zinc in there with it in solution I don’t want to get that out of there the only way to do it is to rinse it over and over with lots of water but I do that it’s gonna form this colloidal suspension that’s hard to settle watch what happens when I’m putting in hydrochloric acid here and watch what happens here as soon as I put it in it forms his colloidal suspension that does not settle [Music] and so I’d have to rinse it and wait a day for our to saddle but instead what I’m gonna do here is I’m gonna put this up on a magnetic stir bar here I’m a magnetic stirrer I’ve got stir bar and add that in returned the stir on and get that stirring see that now I’m gonna start heating the solution up a little bit and then what I’ll do is I’m going to read Azov this using hydrogen peroxide I don’t want to use any nitric acid here because nitric acid causes problems when you go to try to precipitate this out it wants to put the metal back in solution if you got nitric in there so I’m going to avoid using nitric acid I’m going to use hydrogen peroxide and hydrochloric acid instead okay just to let you know what’s going on here I’ve got the platinum group metals sitting in hydrochloric acid 31% what I’m going to do is I’m gonna add some hydrogen peroxide I got the heat on here and it’s stirring with my stir plate I might add a little bit of hydrogen peroxide here I want to put these metals back in solution so I can get a concentrated solution and then precipitate it back out with some zinc [Music] the metals precipitate out of a concentrated solution much more easily than they do from a solution that is low concentration of metals and the reason is when you’ve got to concentrate the solution like this is going to be after I get done dissolving it when I put that zinc in there the precipitate will be nice and fluffy and stick together it’ll settle quick with the metal cementing out on zinc from the previous part of the video there it was in a low concentration of solution and when the metals precipitate out of a low concentrated solution it forms a real fine particulate that is suspends in the solution and does not settle so that’s what I’m doing Emily just back in solution resubmit it so I can get it into a nice fluffy precipitate that settles quickly then I can rinse all the zinc out of it been a couple minutes since I had it down how to do peroxide here you can see the I don’t look at you see it on camera there but right there’s the the black powder platinum group metals and I want to get this all back in the solution so I can submit it back out with zinc get some nice fluffy black precipitate the subtle squiggly it’s been about 20 minutes since I added that first dose of hydrogen peroxide 12% hydrogen peroxide am I gonna temperature reading here and we’ve got 161 Fahrenheit 70 1.8 Celsius not what I’m going to do is go ahead and add another little dose of how to do peroxide I can still see metal down in the bottom here so I’m gonna pour in a little bit more hydrogen peroxide it’s been about five minutes ten minutes since I added that last dosage of hydrogen peroxide you can see if there’s still some black powder on the bottom there so I’m gonna have a little bit more try to get everything to go in solution [Music] okay I’ve got some metal here from a previous experiment this I’ve had this for years and just sitting on my shelf I’m gonna go ahead and add this to this experiment it’s gonna skew the results that I get from my platinum group metals there’s probably five or six grams of palladium here in this container that I’m adding so I have to account for that when we go get our yield from the catalytic converters but I just wanted to add this in it had it sitting on my shop for years man I just want to get that into this group so I can precipitate everything out and get any guy get all the metal out of the solution instead of just let it sit around solutions been on the heat with hydrogen peroxide added to it for about half an hour now I’m gonna get a little bit on a piece of the filter paper here just do a stannous chloride test just to show you how concentrated this stuff is [Music] it turns almost black it has such a high concentration of metals in it that’s what we want to see solutions been on here now for about an hour and I’ve got everything to go in solution it’s everywhere it’s all dissolved look underneath here you can see that’s just awesome probably some zinc compound that’s in there but all the precious metals has gone to the solution turn the stir bar off turn off the heat and take this off the heat now and let it cool down so we can filter it now I’ll check the temperature the solution here we’ve got it off the heat about 10 minutes now I got 60 1.6 Celsius 143 Fahrenheit I had a couple Ice Cube’s here to try to get it cooled off I don’t want to increase the volume of that solution too much but keep it concentrated as I can but I want to get it cooled off so I can filter it I had the solution in the refrigerator get it cooled down down to 71 degrees Fahrenheit twenty-one point six degrees Celsius I’ve got a filter flask set up down here now what I’m going to do is filter the zinc compound out of the solution here down last little bit and the beaker here and that fine material that precipitated out when I dissolved the black powder there it is I don’t know what that is I think it’s a compound of sink but I’ll save that in a filter and maybe do some experiments on it later bottom line is it’s clogged the filter up so that’s coming out and just drips now this is a consequence of dissolving the platinum group metals black powder it’s slowed the filter way down here and it’s a fine particulate matter stop the filter up and it’s going to take a while for all this to filter down through the filter paper they’re full vacuum but even so this is going to slow me down a little bit right here but it’s not going to slow me down as much as it would up if I’d have tried to rinse off those real fine black powders they would have never settled it would take days to get the zinc out of it get the stir bar out of there [Music] to me the vacuum has been on this thing for about an hour now it’s taking about an hour and filter this all through I don’t know where I’d be without my vacuum pump you this pump has been running full blast for about an hour we’ve got it at 150 degrees Farenheit 5.2 Celsius this thing’s gonna get an oil change as soon as I shut it off it’s a workhorse I don’t know where I’d be without it Fahrenheit sixty six point four Celsius my kidney I’m giving it an oil change right now I deserves it you okay I’ve got all the salt that was in the solution they’re filtered out here’s what that looks like I think it’s maybe he’s like zinc chloride or something like that anyway it’s out of the solution [Music] now is what a big payoff comes this added a couple extra hours to my video but when you see how well this cements out you’ll see why I did it it’s got a little bit of residue left in the bottom of the flask sir I’ll put that in my stockpot I’m not going to add it to the solution I don’t want to contaminate it okay I’ve got all the platinum group metals here in a solution that’s only it’s less than 800 ml and when I first started out I had about five gallons of solution with this much material in it so I’ve evaporated all the water off I’ve got a lot of the solution out of the way concentrated solution now we’re gonna add some zinc pieces here and this should go right quick here you you get a temperature reading here we’ve got 40 9.6 Celsius 121.5 degrees Fahrenheit there’s a lot of heat giving off for this zinc reaction you all right it only took about 20 minutes to cement that not a lot of solution I’ve got everything in a nice fluffy precipitate now I’m gonna siphon off the waste solution into my bucket and then we’ll burn out the rest of the zinc where they ten-to-one hydrochloric acid the lead hydrochloric acid just like before I’ve got a tube full of water here and I’m going to site then the solution off into my waste bucket we’ve got some boiling hot tap water here I’m gonna go ahead and give it a quick rinse with boiling hot tap water watch how fast it settles alright that boiling water caused it to settle here and about it’s been about three minutes sitting the siphon this off and then we’re gonna go with a hydrochloric acid dilute hydrochloric acid one to ten I’d the court to water hit the rest of the zinc out of here all right here’s our fluffy mixed black platinum group metals there settles quickly just exactly what I was after I’m gonna go ahead and add some my hydrochloric acid to get the rest of the sink out of here now now I’ll add some tap water here by a couple hundred ml just plain tap water and then I’m going to add about 20 ml or so of hydrochloric acid to make a dilute solution like lauric acid and this will hopefully dissolve out any excess zinc that might be in there just let this sit for a while this is our solution it’s been sitting here for about 15 minutes I don’t see any reaction at all in there so I’m going to conclude that all the zinc has been dissolved out of this I’m a good siphon this off and start rinsing it with fresh water you I’ve got some pH test strips here I’m gonna dip one of them in the solution check the pH for close to neutral all the acid is gone out of it then it’s pretty safe to bet that all the zinc will be going out of it to see what we got here and we’re at we’re still down here in the four-point-five region so I need to do some more rinsing until I get up here to the 7.5 or 7.0 region which is a neutral pH you you alright I’ve got another pH test trip here I’m gonna snip it stick it down in the water and as soon we got here now that’s I’m gonna say that’s 7.0 easy I’m neutral now we’re good to go I think it’s safe to conclude that all the zinc is out of here if all the acids been rinsed out so we go to the next step okay for this next step what I’m going to do is a pre weigh a 600 ml beaker here I’m going to write the weight right on the side of it it’s 190 8.9 one 98.9 grams okay here I’ve got our free-weight beaker transfer the black powder into our beaker here hey this Peter here’s got a little bit of black residue on the bottom there I’ll add that to my waste bucket go ahead and put put the heat on back here pour off the rest of the rinse water out of here now that we’ve got this to neutral [Music] try to get as much of the water out of here as possible then I’m going to put it on the heat back there and evaporated to dryness so we can get a weight on the amount of power that we got in this beaker [Music] try to draw off as much this liquid as I can without getting any of the black powder up in here got our nice black powder what I’ll do now is go ahead and put it on some low heat back here and evaporate it to dryness real slow okay here’s our moment of truth see what kind of yield we got remember we added some palladium from a previous experiment here so put it on the scale and we’ve got to nineteen point eight to nineteen point eight okay the beaker ways to nineteen point eight let’s subtract one ninety eight point nine which is the weight of the aunty beaker come up with twenty point nine grams of mixed black powder okay at this point we’ve got twenty point nine grams of a little typically pure platinum and played in there’s probably gonna be a little bit of rhodium in there two metals mixed together in black powder form and what we could do that with this right now nothing else needs to be done we could bag this up and send it to the refiner or refiner that gets credit for platinum and palladium I don’t think any of them get credit for rhodium but you can get credit for the platinum and the Palladium out of this and no further action is required however what I’m going to do for part two of the video is I’m going to take this and we’re going to go ahead and they’ll be find this and try to separate out the metals and see if we can get some pure platinum and pure palladium so this will conclude part 1 of the catalytic converter recovery videos part 1 is done part 2 is coming up thanks for watch


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