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US 3,944,653 AGranted
Process for preparing high purity antimony trichloride and antimony oxide from stibnite ores
AssigneeOccidental Petroleum Corporation
InventorsRobert D. Stewart, John R. McKinley
Life of this patent
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Abstract
Antimony sulfide contained in an antimony sulfide bearing ore, such as stibnite, is converted to high purity antimony trichloride by reacting the antimony sulfide bearing ore with a source of chlorine to form high purity antimony trichloride and sulfur or hydrogen sulfide as separable by-products. The high purity antimony trichloride may be hydrolyzed to form high purity antimony oxide.
Claims14
A gas-liquid phase process for the production of antimony trichloride from antimony sulfide bearing ores and concentrates in particle form which comprises:
- a. reacting antimony sulfide contained in a melt of antimony trichloride in at least one reaction zone with gaseous hydrogen chloride at a temperature above the melting point and below the boiling point of antimony trichloride to form molten antimony trichloride and hydrogen sulfide;
- and
- b. purifying the formed antimony trichloride by fractional distillation, wherein the antimony trichloride is distilled and collected from an antimony trichloride containing distillable mass resulting from the reaction of antimony sulfide with hydrogen chloride.
Dependencies are inferred from the claim text.