Composite semipermeable membrane and production method thereof

Details Composite semipermeable membrane and production method thereof Composite semipermeable membrane and production method thereof

1997-01-29

1998-04-28

Simmons, David A.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

21050038, 210506, 427244, B01D 6912, B01D 7154, B01D 7156

Patent

active

057440395

ABSTRACT:
Disclosed are a composite semipermeable membrane which is excellent in the chlorine resistance and also gives a high desalting faculty and a large water flux, in particular, under a low operation pressure and a production method thereof. The composite semipermeable membrane comprises a porous base material having formed thereon a semipermeable thin film formed by crosslinking polymerization of 2,6-diaminotoluene monomer or a mixture of 2,6-diaminotoluene monomer and other amino compound monomer with a polyfunctional crosslinking agent having at least two functional groups capable of reacting with the amino group(s) of the monomer(s) in one molecule in the presence of an amine salt.

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