Stable high performance bipolar membrane with cross-linked funct

Details Stable high performance bipolar membrane with cross-linked funct Stable high performance bipolar membrane with cross-linked funct

1980-12-29

1982-10-19

Hamrock, William F.

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

Synthetic resins

Ion-exchange polymer or process of preparing

C08F 832, C08H 522

Patent

active

043551165

ABSTRACT:
Stable single film bipolar membranes of prolonged life and improved performance particularly for use in electrodialysis water splitting process, are prepared by introducing a more stable interface in the membrane structure. After the cationic exchange groups are preformed on an insoluble cross-linked aromatic polymeric matrix, the dissociable anionic exchange groups may be introduced more intimately chemically bonded in position by using multi-functional compounds containing mixed tertiary, secondary and primary amine groups, so that the resulting interface is comparatively more stable, and is less likely to be neutralized, therefore, attaining longer life-time and a higher level of performance.

REFERENCES:
patent: 4057481 (1977-11-01), Lee et al.
patent: 4116889 (1968-09-01), Chlanda et al.

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