Aromatic polymide separation membrane

Details Aromatic polymide separation membrane Aromatic polymide separation membrane

1990-06-27

1992-05-12

Kight, III, John

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

Synthetic resins

From carboxylic acid or derivative thereof

55 16, 55 68, 55158, 528128, 528176, 528183, 528226, 528228, 528229, 528348, C08G 802, C08G 6300, C08G 200, C08G 6926

Patent

active

051129418

ABSTRACT:
An aromatic polyimide separation membrane prepared by subjecting an aromatic polyimide membrane to fluorine treatment with an active fluorine is described. The aromatic polyimide separation membrane according to the present invention has an extremely high selectivity and gas permeability, and therefore, is useful as a membrane for separation of gas mixtures or liquid mixtures.

REFERENCES:
patent: 4657564 (1987-04-01), Langsam
patent: 4717394 (1988-01-01), Hayes
patent: 4759776 (1988-07-01), Langsam et al.
patent: 4828585 (1989-05-01), Chiao
Patent Abstracts of Japan, vol. 9, No. 222 (C-302) [1945] and JP-A-60 86 132.
Patent Abstracts of Japan, vol. 12, No. 248 (C-511) [3095] and JP-A-63 36 804.
Patent Abstracts of Japan, vol. 13, No. 199 (C-594) [3547] and JP-A-1 22 230.

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