Halogenation of lead sulfide

Details Halogenation of lead sulfide Halogenation of lead sulfide

1978-06-01

1979-11-06

Vertiz, O. R.

Chemistry of inorganic compounds

Halogen or compound thereof

Binary compound containing metal

423 94, C01G 2116

Patent

active

041736230

ABSTRACT:
Lead sources, and particularly lead sulfide concentrates, are halogenated utilizing a halogen gas in a dry atmosphere at a relatively low temperature to selectively halogenate the lead. The process is improved by effecting the halogenation in a fluidized state in a fluidized bed reactor, the fluidized state of the lead sulfide being accomplished by introducing a mixture of halogen gas and an oxygen-containing gas at a rate sufficient to maintain the lead sulfide in the desired fluidized state. Thereafter, metallic lead may be obtained by leaching the halogenated mixture with brine, filtering to separate elemental sulfur and residue from soluble lead halide. The soluble lead halide is then crystallized and the desired metallic lead is obtained by fused salt electrolysis.

REFERENCES:
patent: 2007510 (1934-07-01), Thornton
patent: 3098074 (1963-07-01), Schoppe
patent: 3304249 (1967-02-01), Katz
patent: 4011146 (1977-03-01), Coltrinari et al.

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