Froggy said:
He better not show up in my town, We boys down here dont take kindly to northerners who are trying to pull the wool. Texas is a big state, we have alot of dirt and shovels are cheap....
Note to self--don't piss Froggy off.
One thing 'bout Texas that I take offense to is their arcane and utterly stupid glassware laws. Look 'em up Frog or ask a lawyer and you'll be really sad to hear that you can't own so much as a beaker. Not to mention that if you were to disassemble a coffee maker for the hotplate and the pyrex carafe you'd be committing a misdemeanor.
I too like Dirty Jobs. Good show, makes me feel I've got it real good!
Back to the catalytic converter business: on this matter, I'm with Harold. I don't think making money out of cats is easy, if you plan on processing them for metals content and THEN selling the metals. It could no doubt be very profitable, but you have to weigh several factors, namely your efficiency, how much your spending per converter, and how much reagents (and their cost) you use in stripping them of values.
I don't think there's an easy to way to get the PGMs out of them. I've worked with platinum and palladium on many an occasion (and rhodium less often), and I'm not here to fool you--they can be tricky, and putting them into solution isn't quite that easy. I do agree that ion exchange resins could be employed to concentrate the values, but I think it would require some good research as to which resin is best.
If I were doing it in bulk (let's say 1000 converters every month) and out for profit, I'd buy some big Nalgene 66 gallon or whatever they are poly drums, some drum heaters, some sort of pulverizer (jaw crusher, gyrator crusher), build my own damn roasting oven with a stainless conveyor belt, and buy the acids in bulk at 60 cents a gallon or whatever it costs. After everything is roasted, I'd dissolve away the substrate leaving Pt and Rh (and some Pd), selectively precip. the Pd from the solution (goes for refining). Then I'd part the Pt from the Rh with aqua regia. Fuse the Rh, go through the hoopla to get it to a form good for hydrogen reduction. As for the Pt, precip. and burn to sponge, then redissolve to refine. A lot of work, and most of the reagents go to removing the substrate. Either that or I'd set up for and try to prove the gas phase extraction on a grand scale. That method is highly efficient on the small scale, but it's also involved. Benefit is that it removes the metal from the substrate, not the substrate from the metal. Still a lengthy aqueous chem work up ahead of you going by that route, but it's easier to get purer product. I'm willing to be that techemet goes through the first process. Oh, they're probably assaying with ICP analysis.
It makes sense that the more you do, the more you'll save on reagents and processing. I'm not here to dissuade anyone who's a hard enough worker to do them all by hand (Lord knows with rhodium at $8500 an ounce, I'm about ready to), but it is going to be hard work just as Harold said. You'll be busting your can for every dollar.
Lou