Slaughlin79
Well-known member
When you can’t find any info for the Questions you have hands on experience is priceless but only if you have common sense and awareness. What I did was evaporate a HCl/ 10% sodium hypochlorite solution that has been leaching away at some catalytic converter combs for more than a month and took about a 75 ml of the evaporated solution and presented that with more bleach and what happened was a orange red precipitation that formed that I would think can only be palladium and that’s why I’m doing this post,to get your opinions.
Evaporating HCl/bleach you end up with a ton of salt and that was my first amd really only problem so I just sucked up some of the salt free solution on top after it settled. Zinc is too expensive “I think” to drop the platinum black but I’m having problems dropping with aluminum bc the solution becomes very thick and turns brown and doesn’t want to settle and that’s why I tried it this way. I know the preferred method is dropping the paltnimim black and redissolving in aqua regia “which is what I will do when that p Black settles” and then dropping platinum followed by palladium but this was only a very small test batch.
When poured the swimming pool chlorine into the solution I got a orange red foam and a fluffy I gues youbwpuod call it precipitate that seems to be very sticky. I’m searched and searched and I can’t find any references to pgm salts being sticky. Does that sound right? Are palladium salts switch or tacky? If you were precipitating palladium with chlorine gas would this be what you would expect to see? I don’t see how it could be anything else especially since the stannous test turns so dark a green it’s almost black. That would mean it’s pretty dang loaded right? Any ways here’s a few pics and I would like yalls thoughts. Thanks
Evaporating HCl/bleach you end up with a ton of salt and that was my first amd really only problem so I just sucked up some of the salt free solution on top after it settled. Zinc is too expensive “I think” to drop the platinum black but I’m having problems dropping with aluminum bc the solution becomes very thick and turns brown and doesn’t want to settle and that’s why I tried it this way. I know the preferred method is dropping the paltnimim black and redissolving in aqua regia “which is what I will do when that p Black settles” and then dropping platinum followed by palladium but this was only a very small test batch.
When poured the swimming pool chlorine into the solution I got a orange red foam and a fluffy I gues youbwpuod call it precipitate that seems to be very sticky. I’m searched and searched and I can’t find any references to pgm salts being sticky. Does that sound right? Are palladium salts switch or tacky? If you were precipitating palladium with chlorine gas would this be what you would expect to see? I don’t see how it could be anything else especially since the stannous test turns so dark a green it’s almost black. That would mean it’s pretty dang loaded right? Any ways here’s a few pics and I would like yalls thoughts. Thanks