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Reply To: | TechNet E-Mail Forum. |
Date: | Mon, 19 Apr 1999 11:55:22 +0100 |
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Shipley have developed a process for this - the lead is electro-won and
the tin is precipitated out as oxide (apparantly a very usefull polishing
material!). In addition to PCB manufacture this provides a usefull route
for tin/lead solder recycling during PCB dissasembly (or rework).
David Whalley
At 06:00 PM 4/17/99 +0800, you wrote:
>Hello, technetters,
>
>Quite some of board shops sucessfully installed on line copper etchant
>recycle. The technology is actually very mature. The next stop for on line
>recycle is Tin stripper.
>
>Any ideas or do you run tin stripper recycle on line successfully? Please
>share your experience with us. We are using nitric acid based stripper and
>think how to take Tin out of the spent solution. We are using
>precipitation tank treatment. Dialysis is one method but seems to be too
>expensive for just recovering the inpensive nitric acid.
>
>Please share your case which is feasible and cost effective and good for
>environment.
>
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