Method for recovering metallic nickel from ferric chloride waste

Details Method for recovering metallic nickel from ferric chloride waste Method for recovering metallic nickel from ferric chloride waste

1992-12-31

1994-02-08

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

156642, C22B 346

Patent

active

052845052

ABSTRACT:
Nickel ion contained in a ferric chloride waste liquid is recovered as metallic nickel by the following method. Firstly, the ferric chloride waste liquid is added with metallic iron and then heated and stirred to precipitate the metallic nickel. Thereafter the sludge containing this metallic nickel precipitate and the suspension are separated. Then, after the ferric chloride waste liquid is poured into the sludge and then heated and stirred so as to dissolve an iron constituent of the sludge and react it with the ferric chloride waste liquid, the suspension and the sludge are separated. After that, the sludge after the concentration process is taken out.

REFERENCES:
patent: 4940337 (1990-07-01), Nakaji et al.

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