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US 4,378,245 AGranted
Distillation process for separating silver and copper chlorides
AssigneeStandard Oil Company (Indiana)
InventorJerry E. Dobson
Life of this patent
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AssigneeStandard Oil Company (Indiana)
InventorJerry E. Dobson
Estimating the term…
Purification of cuprous chloride is accomplished by distillation wherein cuprous chloride is recovered as the overhead product, and substantially all of the silver chloride and other impurities present report to the bottoms. Typical impurities in copper ore leach liquors include chlorides of silver, calcium, arsenic, bismuth, iron, nickel, lead, antimony, selenium, tellurium, silicon, mercury, manganese, tin, aluminum, magnesium, chromium, cobalt, cadmium, molybdenum, zinc and titanium, most of which may be excluded in large part by crystallization of cuprous chloride. Measurable amounts of these impurities, however, report to the crystals, and silver tends to co-precipitate with the copper in major amounts. Distillation accomplishes a high degree of copper-silver separation and substantial elimination of other impurities from the copper.
A process for separating cuprous chloride from a mixture comprising cuprous chloride and silver chloride comprising subjecting the mixture to distillation within suitable processing conditions so as to effect the separation.
A process for recovering cuprous chloride from a chloride solution comprising cuprous chloride and silver chloride comprising:
A process for separating cuprous chloride from a chloride solution comprising cuprous chloride and silver chloride and one or more impurities selected from the group consisting of calcium chloride, arsenic chloride, bismuth chloride, iron chloride, nickel chloride, antimony chloride, selenium chloride, tellurium chloride, silicon chloride, mercury chloride, manganese chloride, tin chloride, aluminum chloride, magnesium chloride, chromium chloride, cobalt chloride, cadmium chloride, molybdenum chloride, zinc chloride and titanium chloride comprising:
A process for purifying cuprous chloride crystals comprising subjecting the cuprous chloride to distillation under processing conditions so as to recover a substantial portion of the cuprous chloride as the overhead product while isolating at least a portion of the impurities in the liquid bottoms, wherein the distillation is performed at a pressure of less than 400 mm Hg.
A process for recovering copper from copper sulfide concentrates comprising:
A process for recovering copper from copper-containing ore concentrates comprising:
Dependencies are inferred from the claim text.