Selective two stage leaching of nickel from nickel-copper matte

Details Selective two stage leaching of nickel from nickel-copper matte Selective two stage leaching of nickel from nickel-copper matte

1980-06-18

1982-04-06

Hearn, Brian E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 48, 423150, 204112, C25C 106, C22B 1514

Patent

active

043235417

ABSTRACT:
A finely-ground nickel-copper matte is leached using an acid at a minimum temperature of approx. 80.degree. C. and under oxidizing conditions in order to produce a nickel sulfate solution and a nickel-cooper sulfide residue, which is separated from the solution and thereafter the nickel-copper sulfide residue is leached using acid in an autoclave at a minimum temperature of 110.degree. C. and under oxidizing conditions in order to produce an additional quantity of nickel sulfate solution and a copper sulfide precipitate.

REFERENCES:
patent: 1756092 (1930-04-01), Lathe
patent: 3293027 (1966-12-01), Mackiw
patent: 3741752 (1973-06-01), Evans
patent: 3962051 (1976-01-01), Symens
patent: 4042474 (1977-08-01), Saarinen
patent: 4093526 (1978-06-01), Blanco
patent: 4100043 (1978-07-01), Chou
patent: 4130626 (1978-12-01), Hoover

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