Acid efficient membrane for use in electrodialysis for recovery

Details Acid efficient membrane for use in electrodialysis for recovery Acid efficient membrane for use in electrodialysis for recovery

1989-08-14

1991-09-03

Niebling, John

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204301, 204252, 521 27, C25B 1308

Patent

active

050451715

ABSTRACT:
In contrast to prior art conventional anion selective membranes, the membranes of this invention have a low transport number for hydrogen ions (e.g. t.sub.H.spsb.+ .ltoreq.0.3) and a high transport number for low ionic weight anions (e.g. t.sub.A.spsb.- .gtoreq.0.7) in acid solutions (e.g. 0.5 to 1.0 gram-equivalents H.sup.+ per liter). As compared to such prior art membranes, those of this invention have a critically lower ratio of water content to anion exchange capacity.

REFERENCES:
patent: 4167551 (1979-09-01), Tamura et al.
patent: 4294933 (1981-10-01), Kihara et al.
patent: 4374720 (1983-02-01), MacDonald
patent: 4587269 (1986-05-01), Thomas, Jr.
patent: 4769152 (1988-09-01), Igawa et al.
patent: 4789443 (1988-12-01), deNora et al.

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