Chemical Dry Silver chloride-- Now What??

[Junior2021]

How was it made?
What is the base metals?
Do you need to keep the base metals untouched?
If not just dissolve the base metals in HCl or Nitric (Best).
And then reduce the AgCl with your preferred method.
NaOH/Syrup, Iron/Sulfuric or any other method.

NOTE: I had never been interested in refining silver, the price here in Brazil was very low, but I always saved the recovered Agcl residues, even when dirty, and I always kept them hydrated. Today I have about 6 kg of this residue. Now the price has gone up here in Brazil. Thank you, my friend Yggdrasil.

 

[Yggdrasil]

Thanks for your help
I have nitric and also hydrochloric, but the residue is this one. You can see that it is very dark, it even looks like it has already reduced, but it is not. It has copper, tin, and silver chloride together. I prefer to do the reduction with sodium hydroxide and glucose syrup. Thanks.

I have never dissolved AgCl in Ammonia.
What strenghts do you have?
The one most important thing is to reacidify immediately after precipitation.
The main issue I see in the current situation is the Tin.
First wash and filter as good as possible.
So after dissolving the AgCl, filter well again and add HCl or NaCl to it to drop the Silver as Chloride.
Wash this well and make sure all Ammonia is acidified.

Treat the now clean AgCl as your personal preference.

But let us wait a bit and see if someone has a better idea.

 

[anarxi]

I usually restore such dirty chloride (sediment from the washing water from the stock pot) using aluminum and hydrochloric acid.
then I wash it with settling and decanting several times, then with caustic soda, after washing with clean water.
and dissolve everything with nitric acid.

 

[Junior2021]

I have never dissolved AgCl in Ammonia.
What strenghts do you have?
The one most important thing is to reacidify immediately after precipitation.
The main issue I see in the current situation is the Tin.
First wash and filter as good as possible.
So after dissolving the AgCl, filter well again and add HCl or NaCl to it to drop the Silver as Chloride.
Wash this well and make sure all Ammonia is acidified.

Treat the now clean AgCl as your personal preference.

But let us wait a bit and see if someone has a better idea.

Good afternoon friend
I saw it in some forum post about dissolving Agcl with ammonia but I don't know this process.

My idea would be to try to dissolve the silver with ammonia without dissolving the other residues, it is not a metallized material, it is a mass residue that contains tin, silver and copper in small quantities. Example: leftover pasta that contains silver.

Note I have no experience with silver as I was never interested and always thought it was unfeasible to recover economically. Now here in Brazil it is being valued
Your idea is already helping me.

The goal for me is to clean as much as possible, I'm going to search the forum as there is a lot of important knowledge. Thanks

 

[Yggdrasil]

Good afternoon friend
I saw it in some forum post about dissolving Agcl with ammonia but I don't know this process.

My idea would be to try to dissolve the silver with ammonia without dissolving the other residues, it is not a metallized material, it is a mass residue that contains tin, silver and copper in small quantities. Example: leftover pasta that contains silver.

Note I have no experience with silver as I was never interested and always thought it was unfeasible to recover economically. Now here in Brazil it is being valued
Your idea is already helping me.

The goal for me is to clean as much as possible, I'm going to search the forum as there is a lot of important knowledge. Thanks

Good.
But remember to acidify after the Silver is dropped.
What strength is your Ammonia?

 

[Junior2021]

I usually restore such dirty chloride (sediment from the washing water from the stock pot) using aluminum and hydrochloric acid.
then I wash it with settling and decanting several times, then with caustic soda, after washing with clean water.
and dissolve everything with nitric acid.

Good afternoon friend
You reduced the leftover solution with aluminum and hcl to corrode the aluminum. Did you treat the sediment with water washes, then dissolve it in nitric acid and remove it with hcl or sodium chloride?

In my case, I dropped the silver with hcl from the nitric solution, it came out dirty and with other sediment, copper chloride from another solution, tin, and silver chloride are mixed like dough.

If I made an agua regia with little hno³ and put copper and tin in solution. Could you leave the silver chloride behind?

Is silver chloride insoluble in aqua regia?

Thanks for the help.

 

[Martijn]

Good afternoon friend
You reduced the leftover solution with aluminum and hcl to corrode the aluminum. Did you treat the sediment with water washes, then dissolve it in nitric acid and remove it with hcl or sodium chloride?

In my case, I dropped the silver with hcl from the nitric solution, it came out dirty and with other sediment, copper chloride from another solution, tin, and silver chloride are mixed like dough.

If I made an agua regia with little hno³ and put copper and tin in solution. Could you leave the silver chloride behind?

Is silver chloride insoluble in aqua regia?

Thanks for the help.

Did you mix the tin solution with the AgCl/nitric solution?
You may have created tin paste.

If not, a HCl bath would take care of any tin and copper choride. No need to go for AR. That would in fact create tin paste, aka metastannic acid.

 

[Junior2021]

Did you mix the tin solution with the AgCl/nitric solution?
You may have created tin paste.

If not, a HCl bath would take care of any tin and copper choride. No need to go for AR. That would in fact create tin paste, aka metastannic acid.

If you think about it, it certainly formed stanic acid due to the action of nitric acid and tin. It is this mass that contains the silver chloride. Thanks for the guidance hcl will be a good option.
Thanks for the help.

 

[anarxi]

Good afternoon friend
You reduced the leftover solution with aluminum and hcl to corrode the aluminum. Did you treat the sediment with water washes, then dissolve it in nitric acid and remove it with hcl or sodium chloride?

In my case, I dropped the silver with hcl from the nitric solution, it came out dirty and with other sediment, copper chloride from another solution, tin, and silver chloride are mixed like dough.

If I made an agua regia with little hno³ and put copper and tin in solution. Could you leave the silver chloride behind?

Is silver chloride insoluble in aqua regia?

Thanks for the help.

you had a solution of aqua regia, it contains hydrochloric acid.
As a result, you get a set of chlorides:
silver, tin, copper and other metal chlorides.
With aluminum you reduce metal chlorides to pure metals.
in classical chemistry of the last century, this reducing agent was zinc.
another method uses iron.
on this forum they use lye and sugar.

I use aluminum...

then, after bringing the PH to neutral, you re-dissolve the metal powders with nitric acid.
Then you filter the solution and extract only silver from this pure solution.
If you want, by cementation onto copper, or through chloride.