DROPPING PALLADIUM WITH CHLORINE

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mythen10

Well-known member
Joined
Jun 25, 2022
Messages
259
Hi, I have a queastion :
I have some silver palladium alloy contacts from relay(a lot from a USSR phone central) this from photo,
I dissolve this in nitric and drop the silver with HCl and after I add some urea and ammonium chloride to check platinum if is present (negative) I check the solution with sncl and the colour is turn in brown black(this mean possitve for palladium) and I try to bubble some chlorine gas in solution to drop palladium and is not happen nothing (I DONT CONCENTRATE THE SOLUTION AND I DISOLVE THE CONTACTS WITH THAT BASE METAL FROM PHOTO WICH I BELIEVE IS NOT COPPER and I try to drop with alluminium and form a dark grey slug)
Trying to drop palladium with chlorine if the solution contain base metals is a problem?
What to make to get the palladium out from solution (I don't have access to DMG and sodium chlorate and formic acid , I have only 12.5%ammonia)?
Dropping with alluminium from that solution and after boil the slug in in hcl and dissolve back in small amount of nitric and try again to bubble chlorine(after denox) will work to get red brick palladium salt ?
 

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A lot back and forth here.
Dropping with Aluminum is never a good idea if you suspect base metals.
It will drop all, better use copper which will drop only PMs.

One place you say you try to drop with Ammonium Chloride, next you say you have 12.5% Ammonia.
Do you have both or only one?
 
I had some of those years ago from some rotary switching circuits for Bell South. It was a good find considering they paid me to haul it off! If i remember right it's about a 1/4 gram for contact head. I sold mine. It was a long time before i even found refining. Somebody else will have to help you with the chemistry though.
 
I had some of those years ago from some rotary switching circuits for Bell South. It was a good find considering they paid me to haul it off! If i remember right it's about a 1/4 gram for contact head. I sold mine. It was a long time before i even found refining. Somebody else will have to help you with the chemistry though.
what 25% palladium content for each had contact?
 
A 1/4 gram in weight for each contact if it was separated from the base metal.
Mine were from the 60's and were 95% Pd 5% Ag if i remember.
 
I have some copper bars but not big the dimensions is like two fingers and is plated with stannous( wich can I remove with nitric bath) is good for cementing?
I READ ON THE FORUM USING COPPER FOR CEMENTING PALLADIUM IS A PROBLEM BECAUSE MAKE SOME OXIDE ON COPPER AND AFTER THE DROPPING IS STOP
 
AND RETURN TO MY PROBLEM TRYING TO BUBBLE CHLORINE IN PD SOLUTION WICH CONTAIN BASE METALS IS A PROBLEM?
 
I have some copper bars but not big the dimensions is like two fingers and is plated with stannous( wich can I remove with nitric bath) is good for cementing?
I READ ON THE FORUM USING COPPER FOR CEMENTING PALLADIUM IS A PROBLEM BECAUSE MAKE SOME OXIDE ON COPPER AND AFTER THE DROPPING IS STOP
Stop shouting please.
Just a question, how much refining have you done and what kind of facilities do you have?
Cementing PGMs need to be done in a proper way with a lot of stirring.
 
AND RETURN TO MY PROBLEM TRYING TO BUBBLE CHLORINE IN PD SOLUTION WICH CONTAIN BASE METALS IS A PROBLEM?
Shouting again.
Brown is not Pd it’s one of the things that is called false positive.
Can you post a picture if your test?
 
Check on you tube for Sreetips.
He have a good video on bubbling chlorine through a Pd solution.
 
Stop shouting please.
Just a question, how much refining have you done and what kind of facilities do you have?
Cementing PGMs need to be done in a proper way with a lot of stirring.
I refine a lot of silver and gold ,PGM never, I HAVE BASE CHEMICAL ( HCl,sulfuric,ammonia,ammonium chloride,pmb,SMB and I don't have stirrer but I can make something for stirring in solution when is cementing on copper
 
Shouting again.
Brown is not Pd it’s one of the things that is called false positive.
Can you post a picture if your test?
is not brown is black when I was add a lot of sncl directly in main solution become darck brown black
 
Shouting again.
Brown is not Pd it’s one of the things that is called false positive.
Can you post a picture if your test?
believe me , I make a lot of tests on stuff wich contain palladium an the test is same black ,now I don't have any pictures.
 
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