Extraction of metals from mixtures of oxides or silicates
AssigneeThe United States of America as represented by the Secretary of the Interior
InventorCharles F. Davidson
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Abstract
Metals are extracted from mixtures of oxides or silicates by reacting the mixture at elevated temperature with a gaseous chlorinating agent comprising a mixture of water vapor and hydrogen chloride to selectively chlorinate the desired metal or metals.
Claims7
A process for extraction of lithium or calcium from a mixture of metal oxides or silicates, or oxides and silicates, consisting essentially of reacting the mixture with a chlorinating agent comprising a gaseous H.sub.2 O-HCl mixture at a temperature of about 300.degree. to 1200.degree. C. for a time sufficient to selectively convert a substantial proportion of one or both of said lithium and said calcium in the mixture to a water soluble chloride, and subsequently water leaching the metal chlorides from the mixture.
Dependencies are inferred from the claim text.