Chemistry: electrical and wave energy – Processes and products
Patent
1987-03-12
1988-02-09
Andrews, R. L.
Chemistry: electrical and wave energy
Processes and products
204131, 204 98, 204128, 204296, B01D 5940
Patent
active
047240504
ABSTRACT:
A method for electrolytically pretreating a cation exchange membrane by partitioning a first aqueous electrolyte solution from a second aqueous electrolyte solution with the membrane and then passing an electrical current through the system so that the cations of the first solution electro-migrate through the membrane into the second solution. The cation composition of the first solution being more than 99.99% of hydrogen ion and a single cation moiety selected from the group consisting of alkali metal cations and alkaline earth cations, the cation composition of the second solution consisting essentially of the same cation composition as the first solution. The result is a membrane that is almost completely equilibrated with the cations of the first solution. The pretreated membrane is especially suitable for use in the sensor for chemical analysis described in U.S. Pat. No. 4,333,810.
REFERENCES:
patent: 3180814 (1965-04-01), Kollsman
patent: 3985631 (1976-10-01), Hora et al.
patent: 4118308 (1978-10-01), Specht
patent: 4333810 (1982-06-01), Wolcott et al.
patent: 4586992 (1986-05-01), Miyake et al.
Bergeron Sheryl M.
Wolcott Duane K.
Andrews R. L.
Stevens Timothy S.
The Dow Chemical Company
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