Permselective membrane

Details Permselective membrane Permselective membrane

1987-03-05

1987-09-22

Foelak, Morton

Liquid purification or separation

Filter

Material

21050041, 21050023, 521 64, 521184, 521185, 528337, B05D 500

Patent

active

046953833

ABSTRACT:
A permselective membrance suitable for obtaining fresh water by the desalination of sea water and salt water is provided herein, said permselective membrane being prepared by the reaction of an aromatic polycarboxylic acid component with a mixed diamine component comprising a diaminodiphenylsulfone compound of the formula (I), ##STR1## wherein R.sup.1 is hydrogen atom or a C.sub.1 -C.sub.12 hydrocarbon group, R.sup.2 s may be same or different, each representing a monovalent organic group, and n is an integer of 0 or 1 to 3, and an alicyclic diamine compound containing two secondary amino groups in the same or different ring(s).

REFERENCES:
patent: 4269967 (1981-05-01), Elfert et al.
patent: 4273903 (1981-06-01), Rose
patent: 4292417 (1981-09-01), Ishii et al.
patent: 4520044 (1985-05-01), Sundet

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