Non-Chemical NaCN - Pins and fingers

[stoneware]

Most metals from electronic wastes are CN-bonded by complex formation. Chlorine won't oxidize ferricyanide, cobalt will resist chlorine oxidation; nickel complex can be oxidized, but requires a much longer contact time. oxidation requires a minimum of 30 minutes of reaction, monitoring of pH and ORP levels, slow mixing, control of ammonia level, and correction of Cl consumption.
I'm certainly sure that wastes after DIY "destruction" will contain significant levels of CN-complexes with heavy metals.

Goldsilverpro was a big fan of using cyanide for stripping gold from certain types of e-waste along with other sources of gold.

I'm not processing IC chips, so your worries are unfounded.

Most recently 4metals made the suggestion of using cyanide.

This thread is before your time, 2017.

Goldsilverpro, Cyanide Stripper Process

 

[stoneware]

Now that we're aware that cyanide is easily destroyed via chlorination.

Imagine 50 pounds of Keyboard Mylars passed through a paper shredder then tumbling the shred in a weak NaCn leach to remove the silver.

From what I read elsewhere. The silver metal may then be plated out by electrolysis of such solutions.

Or it maybe cemented out using zinc dust.

I'm not absolutely sure, if the leach was passed through an activated carbon filter then while being ashed the heat generated would do the conversion for you.

Similair to converting silver chloride thermally.

 

[Yggdrasil]

Now that we're aware that cyanide is easily destroyed via chlorination.

Imagine 50 pounds of Keyboard Mylars passed through a paper shredder then tumbling the shred in a weak NaCn leach to remove the silver.

From what I read elsewhere. The silver metal may then be plated out by electrolysis of such solutions.

Or it maybe cemented out using zinc dust.

I'm not absolutely sure, if the leach was passed through an activated carbon filter then while being ashed the heat generated would do the conversion for you.

Similair to converting silver chloride thermally.

I think you are over thinking this.
Keep with the tried and verifyed methods until you are familiar with the processes.
Films can be stripped with caustic and the residues melted directly.
Silver are too cheap to waste too much energy at.

 

[stoneware]

Most metals from electronic wastes are CN-bonded by complex formation. Chlorine won't oxidize ferricyanide, cobalt will resist chlorine oxidation; nickel complex can be oxidized, but requires a much longer contact time. oxidation requires a minimum of 30 minutes of reaction, monitoring of pH and ORP levels, slow mixing, control of ammonia level, and correction of Cl consumption.
I'm certainly sure that wastes after DIY "destruction" will contain significant levels of CN-complexes with heavy metals.

After the NaCn has been destroyed what about dropping the rest of the metal ions as hydroxides.

 

[stoneware]

I think you are over thinking this.
Keep with the tried and verifyed methods until you are familiar with the processes.
Films can be stripped with caustic and the residues melted directly.
Silver are too cheap to waste too much energy at.

Quite the opposite my friend, I'm not over thinking this.

I recently recovered 3.6 grams of gold along with a platinum sister from 100 pounds of finely ball milled quartz.

The cost of the reagents used - less than a dollar.

As you pointed out caustic aka ( sodium hydroxide ) will work, in your oversight you neglected to realize the economics of using NaCn

Edit to add images.

 

[Yggdrasil]

Quite the opposite my friend, I'm not over thinking this.

I recently recovered 3.6 grams of gold along with a platinum sister from 100 pounds of finely ball milled quartz.

The cost of the reagents used - less than a dollar.

As you pointed out caustic aka ( sodium hydroxide ) will work, in your oversight you neglected to realize the economics of using NaCn

Edit to add images.

View attachment 52624

View attachment 52623

Well if you check, I replied to the mylar part of your post, and in that respect you are over complicating things.
There is no need for Cyanide leach for that.
Drop the emulsion from the film with NaOH and smelt it directly, fast and easy.
I said nothing about ore.

You could at least refer to my actual reply and not construct something just to disagree with me.

 

[stoneware]

Well if you check, I replied to the mylar part of your post, and in that respect you are over complicating things.
There is no need for Cyanide leach for that.
Drop the emulsion from the film with NaOH and smelt it directly, fast and easy.
I said nothing about ore.

You could at least refer to my actual reply and not construct something just to disagree with me.

Personally I would prefer to use the more economic method, NaCn wins hands down..

Look at the price tag sodium hydroxide container.

 

[stoneware]

The conductive ink used on Mylars is silver based which is applied with printer. Emulsions are,

An emulsion is a mixture of two or more liquids that are normally immiscible owing to liquid-liquid phase separation.

Anyhow, I'm done with this topic.

 

[Yggdrasil]

If you buy in the shop it can be expensive but not in chemical stores.
Cyanide is expensive when you take into consideration the safety protocols and waste treatment needed.

 

[Yggdrasil]

The conductive ink used on Mylars is silver based which is applied with printer. Emulsions are,

An emulsion is a mixture of two or more liquids that are normally immiscible owing to liquid-liquid phase separation.

Anyhow, I'm done with this topic.

I think the people treating Silver films here has refered to it as emulsion, probably because of the gelatinous consistency, it becomes a mud that can be collected and smelted directly.
Cheap and effective.