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Ways to capture copper sulfate from nitric acid?







P2Tech -

I have a request from a manufacturer about ways to remove copper sulfate
from a nitric acid cleaning solution. They do parts cleaning primarily
for the semiconductor industry. They have switched to water based
cleaners for the most part, but are installing a nitric acid cleaning
process for certain parts. The copper sulfate comes off the parts, so
they don't have any control over the copper source. If possible, they
want to capture the copper from the spent solution - either before or
after neutralizing the acid - so they can send it for recycling. Anyone
have any ideas of treatment/separation approaches that might work for
them? Thanks.

John Katz
Pollution Prevention Coordinator
US EPA Region 9
75 Hawthorne Street, WST-7
San Francisco, CA  94105
415-972-3283
415-947-3530 (fax)
katz.john@epa.gov


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