Process for producing composite semipermeable membrane
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United States of America Patent
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Feb 18, 2003
Grant Date -
N/A
app pub date -
May 25, 2001
filing date -
Sep 28, 1999
priority date (Note) -
Expired
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Abstract
When forming a separating functional layer containing crosslinked polyamide, by carrying this out in the presence of 1) carboxylic acid ester with a total of 8 or more carbons, or 2) carboxylic acid, it is possible to provide a composite semipermeable membrane which, while still maintaining a high rejection rate, is more outstanding in its water permeability than hitherto.
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