Chemistry: electrical and wave energy – Processes and products
Patent
1980-08-18
1981-12-22
Prescott, Arthur C.
Chemistry: electrical and wave energy
Processes and products
204130, 204151, 204180P, 204DIG13, 210644, C25D 2118
Patent
active
043069460
ABSTRACT:
Anions such as chromate ions are removed from a stream of waste water through an anion selective membrane and are subsequently combined with hydrogen ions transferred across a cation selective membrane in a two-phase Donnan dialysis acid recovery process. In a preferred embodiment chromate ions recovered from an electroplating process rinse solution are recycled to an associated electroplating bath as chromic acid while the chromate ion-depleted rinse solution is recycled to an associated rinse tank.
REFERENCES:
patent: 3454490 (1969-07-01), Wallace
patent: 3761369 (1973-09-01), Tirrell
patent: 3764503 (1973-10-01), Lancy et al.
patent: 3909381 (1975-09-01), Ehrsam
patent: 4118295 (1978-10-01), Korenowski et al.
patent: 4144145 (1979-03-01), Watanabe et al.
R. M. Wallace, "Concentration & Separation of Ions by Donnan Membrane", Oct. 1967, I&EC Process Design & Devel., vol. 6, No. 4, pp. 423-431.
H. M. Kelley, D. Randall, R. M. Wallace, "Metal Ion Recovery from Wastes", 1973, DuPont Innovation, pp. 4-7.
T. A. Davis, J. S. Wu, B. C. Baker, "Use of the Donnan Equilibrium Principle to Concentrate Uranyl Ions by an Ion-Exchange Membrane Process", Jul. 1971, AICHE Journ., vol. 17, No. 4, pp. 1006-1008.
Cutter Lawrence D.
Davis Jr. James C.
General Electric Company
Prescott Arthur C.
Snyder Marvin
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