Cation exchange membranes

Details Cation exchange membranes Cation exchange membranes

1992-01-16

1993-04-20

Page, Thurman K.

Chemistry: electrical and wave energy

Apparatus

Coating, forming or etching by sputtering

521 27, 521 32, 521 1, B01D 6142, C08J 520

Patent

active

052039820

ABSTRACT:
This invention is directed to highly crosslinked, substantially water insoluble, cation exchange membranes prepared from homogeneous solutions comprising at least one substantially water soluble polar solvent (including water) at least one substantially water soluble polymerizable monomeric onium styrene sulfonate McKee type salt and/or substantially water soluble monomeric, polymerizable derivative thereof and at least one substantially water insoluble, di-, tri- or poly-ethylenic (vinyl or related) crosslinking monomer copolymerizable with said sulfonate salt. Membranes, especially useful in electrodialysis, may be obtained in "one-step" processes which require no further chemical reactions after polymerization.

REFERENCES:
patent: 3236881 (1966-02-01), Pieffer
patent: 3887499 (1975-06-01), Hodgdon, Jr.
patent: 4344933 (1982-08-01), Siegl et al.
patent: 4511712 (1985-04-01), Florence
patent: 4710555 (1987-12-01), Peiffer et al.
patent: 4851100 (1989-07-01), Hodgdson et al.
patent: 4946916 (1990-08-01), Pieffer et al.
patent: 5045171 (1991-09-01), MacDonald

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