Semipermeable membrane compositions

Details Semipermeable membrane compositions Semipermeable membrane compositions

1985-10-21

1990-04-24

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050037, 427245, B01J 1300

Patent

active

049198084

ABSTRACT:
Semipermeable membranes which may be used in a variety of separation processes such as desalination, sugar separation, etc. are prepared by contacting a porous support backing material such as polysulfone with an aqueous solution of a hydrazine compound. The coated support material is then contacted with an organic solution of an aromatic polycarboxylic acid chloride whereby an interfacial polymerized condensation reaction product is formed on the surface of the support. The thus formed composite is then cured at an elevated temperature and recovered.

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"Polyamide Membranes" from Reverse Osmosis and Synthetic Membranes by Jourirajan, 1977 pp. 167-210.

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