powder containing 25%Silver and 75%Tin

[Owltech]

This solution could be another solution:

 

[4metals]

I will add this video to the Owltech section in the video library. Hopefully referencing your videos here at GRF has helped you increase your subscriber base!

video added.

 

[Darkthirty]

This solution could be another solution:

I've been looking for a method to remove and reclaim Sn from PCBs. Cetrimide at $150.00 a gallon makes any profit questionable. How is the tin precipitated from solution?

 

[Owltech]

I will add this video to the Owltech section in the video library. Hopefully referencing your videos here at GRF has helped you increase your subscriber base!

video added.

This video is not mine, it was made by a very talented refiner who goes by the name Picky Plans

I'll ask him to shed some light on his process here.
In the mean time here are two more of his videos on the subject:

 

[PickyPlans]

I've been looking for a method to remove and reclaim Sn from PCBs. Cetrimide at $150.00 a gallon makes any profit questionable. How is the tin precipitated from solution?

Ceramide is one of the possible options. Alternatively, you could use Polyquaternium-7 or Polyquaternium-10, commonly found in shampoos and conditioners. However, keep in mind that these may cause the precipitation of metastannic acid after sitting overnight in the polymer matrix. To recover tin in this case, smelting with charcoal is recommended.

Other ammonium quaternary compounds, such as cetrimonium chloride and cetrimonium bromide, can also be used, as they act as copper dissolution inhibitors. If you choose these options, tin recovery can be achieved by dilution followed by the addition of aluminum foil or through electrodeposition using a graphite rod as the anode.

Best Regards
Picky

 

[PickyPlans]

i have a powder containing 25% of silver and 75% of tin--how can i separate the Silver from the tin? thanks for any help.

I believe that a tin chloride cell would be a cleaner and more efficient option, operating at 1 volt with a cast tin-silver alloy bar serving as the anode.

 

[Shark]

Good to see @PickyPlans on GRF. I have watched several of the videos in the past and found many helpful.
Welcome to GRF.

 

[Yggdrasil]

I believe that a tin chloride cell would be a cleaner and more efficient option, operating at 1 volt with a cast tin-silver alloy bar serving as the anode.

Welcome.
How will the Silver in the bar behave in a high Chloride solution?

 

[PickyPlans]

Good to see @PickyPlans on GRF. I have watched several of the videos in the past and found many helpful.
Welcome to GRF.

Thank you so much for the warm welcome! I appreciate your kind words and am glad to hear that you’ve found the videos helpful. Looking forward to being part of the GRF community.

 

[PickyPlans]

Welcome.
How will the Silver in the bar behave in a high Chloride solution?

Thanks !
Silver tends to form metallic silver sludge within a voltage range of 0.7 to 1.0 volts when a high concentration of tin chloride is used as the electrolyte. However, at voltages above 1.5 volts, silver shifts towards the opposite side of the gradient, predominantly existing as silver chloride.

 

[4metals]

Going away for a few days but when I return I will add a section to the video library for Picky. Welcome to the forum.

 

[PickyPlans]

Going away for a few days but when I return I will add a section to the video library for Picky. Welcome to the forum.

I appreciate that ...

 

[Alondro]

I believe that a tin chloride cell would be a cleaner and more efficient option, operating at 1 volt with a cast tin-silver alloy bar serving as the anode.

I would think so too. If it's a pure tin-silver mix, then the electrolysis method would work incredibly well. Plus, pure tin would crystallize on the cathode, meaning recovering BOTH metals at high purity.

 

[Yggdrasil]

Thanks !
Silver tends to form metallic silver sludge within a voltage range of 0.7 to 1.0 volts when a high concentration of tin chloride is used as the electrolyte. However, at voltages above 1.5 volts, silver shifts towards the opposite side of the gradient, predominantly existing as silver chloride.

Will it be riddled with the issues of fast growing whiskers and risk of shorting?

 

[PickyPlans]

Will it be riddled with the issues of fast growing whiskers and risk of shorting?

Yes, it tends to form large crystals and shorten if the current density exceeds 15 mA/cm². To prevent this, maintain a similar cross-sectional area for both the cathode and anode. Additionally, additives like gelatin or sugar can be used as grain refiners.
0.05 percent gelatin would be good point to start.