Method of recovering nickel from a spent fat hardening catalyst

Details Method of recovering nickel from a spent fat hardening catalyst Method of recovering nickel from a spent fat hardening catalyst

1982-02-11

1983-11-15

Konopka, P. E.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Iron group metal

252412, 252413, 2604125, 260418, 423150, 429223, C01G 5304, C01G 5310, C11C 1300, B01J 2394

Patent

active

044155417

ABSTRACT:
The invention relates to a method of recovering nickel from a spent fat hardening catalyst which consists of finely divided nickel metal on a carrier for example of infusorial earth and/or synthetic material and suspended in fat. The fat is saponified by means of an alkali solution to form a dissolved soap composition which is separated from the nickel metal and the carrier. The nickel metal is then leached out from the carrier and recovered in the form of nickel sulphate. Soap can be salted out of the dissolved soap composition and be used for cleaning purposes in industry, and the carrier can be washed and re-used. During the recovery waste solutions from the alkaline accumulator industry may appropriately be used so that only sulphuric acid is needed as a process chemical. The nickel sulphate solution recovered can be used, for example, as a raw material for the production of active nickel hydroxide mass for alkaline accumulators.

REFERENCES:
patent: 1022347 (1912-04-01), Wilbuschewitsch
patent: 1381558 (1921-06-01), Hoskins
patent: 3640897 (1972-02-01), Restaino
patent: 3752706 (1973-08-01), Melin
patent: 4185026 (1980-06-01), Smith et al.

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