Thin-film composite membrane

Details Thin-film composite membrane Thin-film composite membrane

1992-05-13

1993-08-10

Dawson, Robert A.

Liquid purification or separation

Processes

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

210490, 21050021, 21050037, 21050038, 427245, B01D 6100

Patent

active

052345980

ABSTRACT:
A thin-film seimpermeable composite membrane employs the reaction product of N-alkyl phenylenediamine or N,N'-dialkyl phenylenediamine and a poly acyl halide, such as trimesoyl chloride. Preferably the membrane is post-treated with an acid solution followed by an aqueous solution of polyvinyl alcohol and a buffer and/or base to improve its physical properties.

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