Method for separating iron from nickel and/or cadmium from a was

Details Method for separating iron from nickel and/or cadmium from a was Method for separating iron from nickel and/or cadmium from a was

1996-08-06

1998-03-17

Langel, Wayne

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

423138, 423140, C07F 1502, C07F 1504

Patent

active

057288542

ABSTRACT:
A method for separating iron for nickel and/or cadmium contained in a battery waste is composed of a first step in which the spent batteries are crushed and calcined. The calcined pieces are mixed with an acetic acid aqueous solution before acetic acid and water are removed by evaporation or distillation so as to produce a residue containing metallic acetates. Water, the residue and an oxidant are mixed such that Fe.sup.+ and Fe.sup.++ acetates are converted into a basic ferric acetate, Fe(CH.sub.3 COO).sub.2 OH, which is insoluble in water and is recovered by filtration.

REFERENCES:
patent: 3637776 (1972-01-01), Welsh
patent: 4228091 (1980-10-01), Partenheimer
patent: 4401463 (1983-08-01), Melin et al.
patent: 5407463 (1995-04-01), Van Erkel
Zhihuai Xue et al., "Separation and Recovery of Nickel and Cadmium from Spent Cd-Ni Storage Batteries and Their Process Wastes", Separation Science and Technology,27(2), 1992, pp.213-221.

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