Reverse osmosis anisotropic membranes based on polypiperazine am

Details Reverse osmosis anisotropic membranes based on polypiperazine am Reverse osmosis anisotropic membranes based on polypiperazine am

1975-10-28

1978-12-12

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

210 23H, 210500M, 260 302, 260 308R, 260 308DS, 260 326NA, 264203, 264212, 578339, 578341, C08G 6926, B01D 3916

Patent

active

041295595

ABSTRACT:
Disclosed are reverse osmosis anisotropic gel-type membranes having the structure: ##STR1## WHEREIN N IS A WHOLE NUMBER; A is a divalent group derived from piperazine and having the structure: ##STR2## WHEREIN X IS 0 TO 8 AND R is an alkyl group, and Q is at least two divalent organic groups selected from the group consisting of: ##STR3## wherein Y is O or S, ##STR4## Also disclosed are processes for preparing such membranes.

REFERENCES:
patent: 3664986 (1972-05-01), MacDonald
patent: 3687842 (1972-08-01), Credali et al.
patent: 3696031 (1972-10-01), Credali et al.
patent: 3935172 (1976-01-01), Vogl et al.
The Condensed Chemical Dictionary, Eighth Edition, p. 64.

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