Ion exchange membranes

Details Ion exchange membranes Ion exchange membranes

1996-10-03

1998-02-03

Zitomer, Fred

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

Synthetic resins

Ion-exchange polymer or process of preparing

210490, 21050027, 21050041, 210638, 210641, C08J 522, B01J 4712, B01D 6142, B01D 6146

Patent

active

057145210

ABSTRACT:
The invention concerns heterogeneous ion exchange membranes used in electrodialysis which have anti-polarization and anti-fouling properties.
The heterogeneous membranes of the invention comprise, in addition to ion-exchange particles embedded in the matrix, a layer of at least one hydrophilic cross-linked polymer bearing fixed electric charges. Alternatively, the heterogeneous membranes of the invention have a matrix which is itself made of at least one hydrophilic cross-linked polymer.

REFERENCES:
patent: 4673454 (1987-06-01), Liu
patent: 4911844 (1990-03-01), Linder
Rubinstein et al., Desalination, 69:101-114, 1988.
O. Kedem et al., Desalination, 46:185-189, 1983.
O. Kedem et al., AIchE Symp., 248:19-27, 1986.

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