sulfuric acid and sodium chloride
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Yes,
I purchased the article for $30 several months ago.
I've since tested the process on cats and successfully extracted Platinum and Palladium. I have not confirmed Rhodium extraction yet.
I have emailed the author several times trying to get his precipitation techniques, but he has not responded. He does not cover precipitation in the article.
I have since begun developing my own precipitation routes for this method. I will share my results when they are finalized and confirmed by a second party.
Anyone have a quick test for Rhodium in sulfate solutions combined with Pd and Pt?
Steve
I purchased the article for $30 several months ago.
I've since tested the process on cats and successfully extracted Platinum and Palladium. I have not confirmed Rhodium extraction yet.
I have emailed the author several times trying to get his precipitation techniques, but he has not responded. He does not cover precipitation in the article.
I have since begun developing my own precipitation routes for this method. I will share my results when they are finalized and confirmed by a second party.
Anyone have a quick test for Rhodium in sulfate solutions combined with Pd and Pt?
Steve
Maybe this:
After you precipitate Pt and Pd,
Add Na acetate for buffering
Add conc. NaNO2 for getting
the Rh-NO2 soluble complex;
At this point NH4OH should
give the unsoluble complex
expected color yell. brownish.
I'd appreciate back input
After you precipitate Pt and Pd,
Add Na acetate for buffering
Add conc. NaNO2 for getting
the Rh-NO2 soluble complex;
At this point NH4OH should
give the unsoluble complex
expected color yell. brownish.
I'd appreciate back input
Pity you bought it Steve, if it was published in any trade journal I could've got it for you free of charge.
Irons
Well-known member
http://www.columbia.edu/~scb2001/tools/acetate/acetate.html
A
Anonymous
Guest
So I take it this method won't work for gold? It seems too easy. 
A
Anonymous
Guest
works better than clorine and cost less than bromine, used to also be readily available.
It does not cost less than bromine. That is not true. Bromine costs me about 3,3 cents a gram. If you can get iodine for 5 cents a gram, please tell me, because I am sure that I can make more money off of reselling iodine for it's usual price, a dollar per gram, than ever I could from refining.
I'll look into the iodine stuff Froggy. Off to literature land I go.
I'll look into the iodine stuff Froggy. Off to literature land I go.
Spoke with the guy at advanced analytical, he likes resintech.com resins,, said Dow sucks. The bulliten I posted on resins called for bromide, ahhhh the choices!!!!! Decisions, decisions ..... I cant believe there are so many different ways to do this,how much I have read,and how i still dont know what the optimal solution is for what I want to do... Frog
Frog,
I'm still in the very small scale testing stage with the sulfuric acid/halogen method. I've asked Lou via PM for some ideas on testing and precipitating the Rh from the solution.
I did run an new experiment with the cat that I had hit with the MAPP torch. I used hot HCl-Cl using 10% bleach, I was shocked to find that the pregnant solution contained only Pt and no Pd. I think the Pd was converted to an insoluble black powder when I initially added the HCl to the roasted cat. It all floated up thru the vanes in the honeycomb as soon as I added the HCl. I collected this black powder for more tests. I don't think it's carbon due to the lack of any visible carbon after roasting. Any ideas? I'll be dropping the Pt from the solution in a day or so.
I'm also going to run the honeycomb again to see if it gives a second yield.
I still like Lou's halogen gas extraction idea best.
Steve
I'm still in the very small scale testing stage with the sulfuric acid/halogen method. I've asked Lou via PM for some ideas on testing and precipitating the Rh from the solution.
I did run an new experiment with the cat that I had hit with the MAPP torch. I used hot HCl-Cl using 10% bleach, I was shocked to find that the pregnant solution contained only Pt and no Pd. I think the Pd was converted to an insoluble black powder when I initially added the HCl to the roasted cat. It all floated up thru the vanes in the honeycomb as soon as I added the HCl. I collected this black powder for more tests. I don't think it's carbon due to the lack of any visible carbon after roasting. Any ideas? I'll be dropping the Pt from the solution in a day or so.
I'm also going to run the honeycomb again to see if it gives a second yield.
I still like Lou's halogen gas extraction idea best.
Steve
A
Anonymous
Guest
Lou, your right on the price. Been awhile since I used iodine for anything.
The other reason is bromine is a liquid at room temp and if I am not mistaken also evaporates at room temp.
The other reason is bromine is a liquid at room temp and if I am not mistaken also evaporates at room temp.
Oh heck yeah it does, very volatile. But it beats the hell out of chlorine for convenience in use (chlorine cylinders cost a lot, so does the regulator) since I can warm the bromine in a flask to give more pressure and volume, and is absolutely legal to own as a private individual unlike iodine.
If I get to it this weekend, I should have some very nice pictures of a monstrous bromine synthesis. I'll show you all how to make bromine at home, safely, and cheaply.
By the way, if you want bromide, try the pool supply. It's 14 dollars a pound, so you're paying through the teeth, but you'll get some. Ebay it's usually half of that, and if you really want a lot of it, I have a friend that I think has 100lbs of it for $5/lb or something like that.
Lou
PS-Steve, I'm going to be looking into some off the shelf type stuff for rhodium testing. If I can't find anything suitable, I will look around and see what I can't find of my own chemicals.
If I get to it this weekend, I should have some very nice pictures of a monstrous bromine synthesis. I'll show you all how to make bromine at home, safely, and cheaply.
By the way, if you want bromide, try the pool supply. It's 14 dollars a pound, so you're paying through the teeth, but you'll get some. Ebay it's usually half of that, and if you really want a lot of it, I have a friend that I think has 100lbs of it for $5/lb or something like that.
Lou
PS-Steve, I'm going to be looking into some off the shelf type stuff for rhodium testing. If I can't find anything suitable, I will look around and see what I can't find of my own chemicals.
http://cgi.ebay.com/Thermo-ARL-MDL-3410-ICP-Mass-Spectrometer_W0QQitemZ270211619813QQihZ017QQcategoryZ67038QQssPageNameZWDVWQQrdZ1QQcmdZViewItem theres acouple of them around, wish someone here on the forum had one and took pity on us fools!
Sorry, but just because the thing powers up does not mean it works!!!!! Also, what do they mean by powers up? What if there are parts missing, the mirrors scratched? Does it come with the computer that has all of the software for analysis installed? No, I think not.
The seller doesn't seem to have much knowledge of the unit so they are not in a position to determine if it's even still functional. It might be attractively priced (believe me when I saw the price, I was very excited--til I read the description) but if it were defective in any way, the cost of fixing it could be well over 3 or 4 times the cost of the unit at 9K. 'Cause then you have to pay 400 dollars an hour, plus travel, lodging, expenses, and meals for a trained specialist to come service it. I've seen and had experiences there (for instance, one PE fellow loved to talk politics and the environment--fine by me, but don't do it on your PAID time!).
And the biggest turn off; "Return Policy Details: All items sold are "as is, where is". Description given as guide and should only be used for reference."
The seller doesn't seem to have much knowledge of the unit so they are not in a position to determine if it's even still functional. It might be attractively priced (believe me when I saw the price, I was very excited--til I read the description) but if it were defective in any way, the cost of fixing it could be well over 3 or 4 times the cost of the unit at 9K. 'Cause then you have to pay 400 dollars an hour, plus travel, lodging, expenses, and meals for a trained specialist to come service it. I've seen and had experiences there (for instance, one PE fellow loved to talk politics and the environment--fine by me, but don't do it on your PAID time!).
And the biggest turn off; "Return Policy Details: All items sold are "as is, where is". Description given as guide and should only be used for reference."
