How can you seperate Silver chloride from cement silver?

[Akragon]

I made a little mistake and mixed one with another... can this be undone?

 

[Yggdrasil]

I made a little mistake and mixed one with another... can this be undone?

You can to some extent gravity separate them.
How well I do not know, how much is it?

 

[Akragon]

Not a lot...

 

[Yggdrasil]

Not a lot...

The question is if it is worth your time.
Just melt the Silver and Chloride directly with some soda ash.

 

[Golddigger76]

This is not separating to but you can use sodium hydroxide and sugar to convert the silver chloride into silver metal.
If both were going to be melted into a silver bar this is the method that I would use and after you rinse it really well do a low boil in hydrochloric acid to help get rid of the residual copper from the cemented silver and sodium hydroxide/sugar conversion.

 

[Yggdrasil]

This is not separating to but you can use sodium hydroxide and sugar to convert the silver chloride into silver metal.
If both were going to be melted into a silver bar this is the method that I would use and after you rinse it really well do a low boil in hydrochloric acid to help get rid of the residual copper from the cemented silver and sodium hydroxide/sugar conversion.

I was concerned as it could be hard to wash with a mix of Metal powders/Chlorides and gunk from the conversion.
Not much, means less than 100grams of total mass I guess?

 

[Akragon]

I was concerned as it could be hard to wash with a mix of Metal powders/Chlorides and gunk from the conversion.
Not much, means less than 100grams of total mass I guess?

Lol no not even close... it was really a retorical question

 

[Yggdrasil]

Lol no not even close... it was really a retorical question

Well if you get into a situation like this (which is easily avoided by proper procedures),
one can do a full Lye/Sugar conversion with all its gunk and cleaning.
Or a halfway maybe, convert to Silver Oxide by NaOH and smelt to Silver or even a direct smelt with Soda Ash.
Maybe the dilute Sulfuric/Iron Conversion can be a better option??
Put the whole mass into a rotating drum with some dilute Sulfuric and some Iron pieces and run it until it is done.

 

[lazersteve]

I made a little mistake and mixed one with another... can this be undone?

Wash well with tap water and treat the resulting lot as silver chloride with sugar/lye as already suggested.

Steve

 

[Ultrax]

If you need to divide AgCl and metallic Ag, a solution of 10% ammonia will transform the silver chloride into a complex, and the metallic silver will remain intact. Or just a very hot (95-100C) saturated sodium chloride (NaCl) solution. It also dissolves silver chloride (approx. 4 grams per liter). Precipitation from such solutions is trivial.

 

[BGDOCK]

This is not separating to but you can use sodium hydroxide and sugar to convert the silver chloride into silver metal.
If both were going to be melted into a silver bar this is the method that I would use and after you rinse it really well do a low boil in hydrochloric acid to help get rid of the residual copper from the cemented silver and sodium hydroxide/sugar conversion.

Do you use a dilute solution if HCl ?
How long of a boil ?
I’m really having trouble w/ copper in this last batch

 

[Ultrax]

Copper can be separated from silver by a mixture of 50% citric acid + hydrogen peroxide 30%. This mixture will slowly dissolve fine copper with gentle heating.

 

[eaglekeeper]

Copper can be separated from silver by a mixture of 50% citric acid + hydrogen peroxide 30%. This mixture will slowly dissolve fine copper with gentle heating.

Do you know if this procedure also works with PGM's contaminated with a little copper?

 

[BGDOCK]

More chemicals to buy
What would the ratio / method of citric and peroxide be ?
I don’t think dilute HCl Is doing the trick right now the solution is crystal clear and on a low boil. I think I’m going to filter rinse well and use my oxy/acetylene rig and melt this problematic batch of cemented silver with soda ash

 

[Ultrax]

Do you know if this procedure also works with PGM's contaminated with a little copper?

Yes, but reaction speed depends on copper particles' size.

 

[Ultrax]

More chemicals to buy
What would the ratio / method of citric and peroxide be ?

The volume ratio 1: 10, but depends on real peroxide concentration. Adjust pH as low as possible for your citric acid quantity, better < 4.

 

[BGDOCK]

Last question for the night.
Did you buy the citric acid as a Liquid or in a powder ?

Thanks,

 

[Ultrax]

You should make a liquid acid solution.