Nickel-containing leachate having low aluminum content

Details Nickel-containing leachate having low aluminum content Nickel-containing leachate having low aluminum content

1988-12-28

1989-08-29

Stoll, Robert L.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

75 2, 75115, 75119, 423123, 423128, 423131, 423140, 423145, 423146, 423150, C22B 2304

Patent

active

048613711

ABSTRACT:
A nickel-containing ore is leached with sulfuric acid to dissolve nickel and associated metallic values into the sulfuric acid to form a leachate, the sulfuric acid further containing a source of the monovalent cations sodium, potassium or ammonium to suppress solubilization of aluminum ions in the ore. The leaching process is conducted at elevated temperatures of from about 200.degree. C. to about 300.degree. C., and at elevated pressures. In such leaching process, the monovalent cations are present in the leaching liquid prior to the initiation of leaching, to achieve an aluminum content of the leachate of less than about 0.5 grams per liter.

REFERENCES:
patent: 3130043 (1964-04-01), Lichty
patent: 3436176 (1969-04-01), Spedden et al.
patent: 3798304 (1974-03-01), Weston
patent: 4098870 (1978-07-01), Fekete et al.
patent: 4195065 (1980-03-01), Duyvesteyn
patent: 4415542 (1983-11-01), Queneau et al.
patent: 4511540 (1985-04-01), Crussard et al.
patent: 4541868 (1985-09-01), Lowenhaupt
U.S. Bureau of Mines Publication RI 7162 by H. G. Iverson and H. Leitch, "Alumina Extraction by Autoclave Precipitation of Basic Sodium Aluminum Sulfate", Aug. 1968.

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