Process for recovery of zinc from plating waste solutions

Details Process for recovery of zinc from plating waste solutions Process for recovery of zinc from plating waste solutions

1982-08-13

1986-10-21

Sadowski, David

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

204DIG13, 423 99, 423DIG14, B01D 1300

Patent

active

046184287

ABSTRACT:
A membrane-based solvent extraction system is used to separate zinc from plating wastes and to recycle the concentrated zinc solution to the plating bath. Di-2 ethylhexylphosphoric acid (DEHPA) is used as an organic carrier, and an acid or salt solution is used as a stripping agent in this process.

REFERENCES:
patent: 3956112 (1976-05-01), Lee et al.
patent: 3957504 (1976-05-01), Ho et al.
patent: 3969478 (1976-07-01), Zelikman et al.
patent: 4118295 (1978-10-01), Korenowski et al.
patent: 4144145 (1979-03-01), Watanabe et al.
patent: 4306946 (1981-12-01), Kim
patent: 4357220 (1982-11-01), Eisenmann
Baker, R. W. et al., "Coupled Transport Membranes", J. of Memb. Science, 2(1977), 213-233.
Flett, D. S. et al., "The Recovery of Molybdenum from Spent Mandrel Acid by Solvent Extraction", Proc. Inter. Solvent Extraction Conf. Held Sep. 6-12, 1980 in Liege Belgium, pp. 1-10.
Skovronek, H. S. et al., "Advanced Treatment Approaches for Metal Finishing Waste Waters, Part II" Plating and Surface Finishing, Nov. 1977, pp. 24, 26, 28, 30 and 31.

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