Title: Method of stripping base metals from fused salts

Abstract: Base metal chlorides are recovered from fused alkali metal or alkaline earth metal halide salts by precipitation with at least one reagent selected from the group consisting of hydrogen, hydrogen sulfide or aluminum. Advantageously, the bulk of the base metals are precipitated by combinations of hydrogen sulfide and hydrogen to produce a precipitate having a controlled sulfur content that is molten at temperatures between about 750.degree. C. and 900.degree. C., and final salt cleaning is achieved by precipitating residual base metals with aluminum. The melting point of the precipitate is also controlled by the ratio of nickel to other base metals in the salt.

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Inventors: Bell, Malcolm Charles Evert (Sudbury, CA, US)
Eerkes, Thijs (Mississauga, CA, US)
Sridhar, Ramamritham (Mississauga, CA, US)

Application Number: 482249
Filing Date: 1974-06-24
Publication_date: 1977-07-26
Assignee: The International Nickel Company, Inc. (New York, NY)
Primary Class(es): 75/437 75/627, 75/629, 75/640, 423/561.1
Other Classes:
US Patent Ref:

1737888	Dec, 1929	McIntosh	75/85.
2990270	Jun, 1961	Lefever	75/82.
3291597	Dec, 1966	Mellgren	75/63.
3802870	Apr, 1974	Bell	75/82.

Other Refs:
Primary Examiner: Andrews, M. J.
Assistant Examiner:
Attorney: Leff; Miriam W., MacQueen; Ewan C.