Chemistry: electrical and wave energy – Processes and products
Patent
1977-09-16
1978-11-07
Williams, Howard S.
Chemistry: electrical and wave energy
Processes and products
C25C 334
Patent
active
041244575
ABSTRACT:
Metallic lead is obtained from lead sulfide ores or concentrates by subjecting the concentrate to a drying step followed by halogenating the dried concentrate in a dry atmosphere at a temperature in the range of 90.degree. to about 120.degree. C. Thereafter the halogenated mixture is subjected to a water wash and leached with a brine solution. The brine solution is then filtered to separate elemental sulfur and residue from the solubilized lead halide, the latter being then crystallized and subjected to fused salt electrolysis to recover metallic lead.
REFERENCES:
patent: 607287 (1898-07-01), Larsen
patent: 1346642 (1920-07-01), Elmore
patent: 1943340 (1934-01-01), Mitchell
patent: 3961941 (1976-06-01), Baker
Stauter John C.
Um Richard T.
Hoatson Jr. James R.
Nelson Raymond H.
Page II William H.
UOP Inc.
Williams Howard S.
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