Removal of arsenic, antimony and bismuth from molten copper with

Details Removal of arsenic, antimony and bismuth from molten copper with Removal of arsenic, antimony and bismuth from molten copper with

1975-09-08

1977-03-01

Satterfield, Walter R.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 69, 75 70, 75 93E, C22B 1500

Patent

active

040100308

ABSTRACT:
Bismuth, antimony, and arsenic impurities are removed from molten copper by contacting such molten copper with sulfur hexafluoride gas, which reacts directly with the specified impurities to form gaseous fluorides.

REFERENCES:
patent: 1778292 (1930-10-01), Donahue
patent: 1809871 (1931-06-01), Smith
patent: 3490897 (1970-01-01), Dore et al.
patent: 3619177 (1971-11-01), Beck et al.
patent: 3767383 (1971-11-01), Bell et al.

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