Mass-transfer membrane and processes using same

Details Mass-transfer membrane and processes using same Mass-transfer membrane and processes using same

1977-07-11

1978-11-07

Edmundson, F.C.

Chemistry: electrical and wave energy

Processes and products

204105R, 204149, 204150, 204151, 204180R, 204180P, 204252, 204253, 204257, 204283, 204295, 204296, 204301, C25B 1304, C25C 704

Patent

active

041244583

ABSTRACT:
A porous layer is provided on one or both surfaces of a mass-transfer membrane to enhance or modify the passage of ions. The membrane may be a film of any of a variety of polymeric materials, and the porous layer may be a surface layer on the membrane or a separate porous structure placed in contact therewith. The porous layer or layers render certain normally ion-impermeable polymeric films capable of passing ions in an electrodialysis-type system.

REFERENCES:
patent: 585387 (1897-06-01), Kellner
patent: 2827426 (1958-03-01), Bodamer
patent: 3258414 (1966-06-01), Gregor et al.
patent: 3356607 (1967-12-01), Eisenmann et al.
patent: 3694281 (1972-09-01), Leduc
patent: 3755308 (1973-11-01), Yasuda
patent: 3979274 (1976-09-01), Newman
patent: 4003818 (1977-01-01), Juillard et al.

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