powder containing 25%Silver and 75%Tin

[arthur kierski]

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.

 

[Yggdrasil]

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.

The Tin will dissolve in HCl Silver will not.
And at this concentration the Tin should completely dissolve I believe.

 

[nickvc]

Not sure if using HCl will create silver chloride especially in powder form but I think caustic soda will dissolve tin especially if heated , should you choose that option be very careful caustic is nasty and even worse if hot.
Try a couple of small samples using both methods and pick the one that suits your needs.

 

[kurtak]

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.

We need more information about this powder

Such as -----------

How fine is the powder - powder could be considered anything from 40 mesh in size to 300 mesh & even finer

It can make a difference on how chems will react with it --- example - at 40 mesh HCl would likely dissolve the tin leaving the silver with little or no effect on the silver - but at 300 mesh the HCl "may" create some AgCl

Is the powder an alloy of tin/silver - or is it tin powder - mixed - with silver powder

Kurt

 

[Alondro]

We need more information about this powder

Such as -----------

How fine is the powder - powder could be considered anything from 40 mesh in size to 300 mesh & even finer

It can make a difference on how chems will react with it --- example - at 40 mesh HCl would likely dissolve the tin leaving the silver with little or no effect on the silver - but at 300 mesh the HCl "may" create some AgCl

Is the powder an alloy of tin/silver - or is it tin powder - mixed - with silver powder

Kurt

This seems to be essentially silver 'inquarted' with tin. Should that be enough to dissolve the tin in HCl even if it's an alloy?

 

[anarxi]

I think the silver will be covered with a chloride crust and will partially seal some of the tin if you use hydrochloric acid, besides, it (the chlorine crust) will not be dissolved by nitric acid...
I think direct dissolution in nitric acid and cementation on copper is more practical.

 

[nickvc]

I think the silver will be covered with a chloride crust and will partially seal some of the tin if you use hydrochloric acid, besides, it (the chlorine crust) will not be dissolved by nitric acid...
I think direct dissolution in nitric acid and cementation on copper is more practical.

I’m not sure mixing nitric and tin would be my choice of process for this material…trying to filter the solution full of metastatic acid would be a nightmare .

 

[Yggdrasil]

I’m not sure mixing nitric and tin would be my choice of process for this material…trying to filter the solution full of metastatic acid would be a nightmare .

Exactly what I thought too.
Maybe the Sodium Hydroxide route is better, but I have never tried that.