Interfacially polymerized polyester films

Details Interfacially polymerized polyester films Interfacially polymerized polyester films

1995-06-06

1997-07-22

Mosley, Terressa

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

95 43, 95 54, 21050021, 21050026, 528176, 528193, C08G 6302

Patent

active

056504799

ABSTRACT:
The present invention concerns a polyester gas separation membrane which is obtained by the interfacial polymerization of benzenetricarbonyl trihalide or benzene tetracarbonyl tetrahalide in a water-insoluble organic solvent in one phase and a variety of polyfunctional phenols present as the di- or tri-salt in a mixture of water and phase transfer agent and a water-soluble organic solvent in the second phase. The present invention also includes the polyester membrane itself, its methods of preparation and the use of the membranes to separate gas mixtures, such as carbon dioxide and methane, helium and methane and the like.

REFERENCES:
patent: 4493714 (1985-01-01), Ueda et al.
patent: 4781733 (1988-11-01), Babcock et al.
patent: 4822382 (1989-04-01), Nelson
patent: 4840646 (1989-06-01), Anand et al.
patent: 4851014 (1989-07-01), Jeanes
patent: 4994095 (1991-02-01), Kawakami et al.
patent: 5049167 (1991-09-01), Castro et al.
patent: 5177296 (1993-01-01), Sartori et al.
patent: 5246587 (1993-09-01), Tomasche
patent: 5271843 (1993-12-01), Chau et al.

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