Pervaporation method of separating liquid organic compound mixtu

Details Pervaporation method of separating liquid organic compound mixtu Pervaporation method of separating liquid organic compound mixtu

1989-09-26

1990-09-25

Sever, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

55 16, 210654, E01D 6136

Patent

active

049591517

ABSTRACT:
A pervaporation method of separating a liquid organic compound mixture at a high speed and efficiency through an aromatic polyimide asymmetric separating membrane produced from an aromatic tetracarboxylic acid component comprising at least 70 molar % of biphenyl or diphenylether tetracarboxylic dianhydride and an aromatic diamine component comprising 85 molar % or more of an aromatic diamine having 2 to 3 benzene ring structure, or 15 molar % or more of 9,10-di(aminophenyl)anthracene, di(aminophenoxy)diphenylsulfone, di(aminophenoxy)biphenyl or di(aminophenoxy)diphenylalkane compounds, or a mixture of 15 to 50 molar % of an aromatic diamine having alone benzene or pyridine ring structure and 50 to 85 molar % of an aromatic diamine having a 2 to 3 benzene ring structure.

REFERENCES:
patent: 4240914 (1980-12-01), Iwana et al.
patent: 4358378 (1982-11-01), Iwawa et al.

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