Alkali resistant hyperfiltration membrane
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United States of America Patent
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Jan 23, 1990
Issued Date -
N/A
app pub date -
Apr 14, 1989
filing date -
Jan 8, 1987
priority date (Note) -
Expired
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Abstract
A novel hyperfiltration membrane and process for making the same is described. The membrane is useful for processing copper electroless solutions to concentrate for re-use salts of chelating agents. The membrane can be prepared by crosslinking a water-compatible polymer in the presence of a strong mineral acid, such as phosphoric acid.
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