Process and apparatus for recovering metals from dilute solution

Details Process and apparatus for recovering metals from dilute solution Process and apparatus for recovering metals from dilute solution

1985-11-04

1987-03-24

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204107, 204108, 204112, 204113, 204114, 204116, 204118, 204119, 204149, 204275, 210660, 210663, 210670, 210676, 210677, 210681, 521 26, C25C 100

Patent

active

046523529

ABSTRACT:
A process and apparatus are provided for recovering metals from dilute solution utilizing ion exchange and, optionally, electrolytic recovery. Ammonium salt regeneration solutions for use in the process and apparatus are also provided. In one aspect, the invention provides a closed loop process and apparatus whereby metals may be recovered from spent electroplating rinse solutions for reuse in the electroplating bath with essentially no generation of waste.

REFERENCES:
patent: 3457152 (1969-07-01), Maloney et al.
patent: 4004994 (1977-01-01), Andrus
patent: 4088563 (1978-05-01), Marquardt
patent: 4176056 (1979-11-01), Grier
patent: 4243498 (1981-01-01), Sherwood et al.
patent: 4318789 (1982-03-01), Marcantonio
patent: 4387026 (1983-06-01), Woolacott
patent: 4500396 (1985-02-01), D'Agostino et al.
patent: 4543169 (1985-09-01), D'Agostino et al.
"Sludge Disposal . . . ", by Steward et al., Metal Finishing, 11/85, pp. 15-45.
"Environmental Update . . . ", P.C. FAB, 5/85, pp. 12-30.
"Two Cation Exchange Columns . . . ", Chem. Processing, 8/84, pp. 102-103.
"Impact . . . ", by Mabbett et al., Metal Finishing, 4/85, pp. 25-60.

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