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US 4,732,751 AGranted
High purity lithium oxide process
AssigneeLithium Corporation of America
InventorDennis J. Salmon
Life of this patent
Estimating the term…
Abstract
A process for producing high purity lithium oxide comprising decomposing lithium peroxide at a temperature of 350.degree. to 450.degree. C., in an inert atmosphere in the substantial absence of water to produce impure lithium oxide followed by heating the impure lithium oxide under moderate vacuum at 900.degree. C. or more for at least one hour to obtain high purity lithium oxide of 99% or greater purity.
Claims3
A process for producing high purity lithium oxide from lithium peroxide containing lithium carbonate or lithium hydroxide or a mixture thereof comprising the steps of:
- (a) decomposing lithium peroxide containing up to 16% by weight of lithium carbonate or lithium hydroxide or a mixture thereof at a temperature of 350.degree. to 450.degree. C., in an inert, anhydrous atmosphere to produce impure lithium oxide;
- and
- (b) heating the impure lithium oxide containing up to 25% by weight of lithium carbonate or lithium hydroxide or a mixture thereof under a pressure of not more than 0.2 kilo Pascals at 900.degree. C. or more for at least one hour to obtain high purity lithium oxide of 99% or greater purity.
Dependencies are inferred from the claim text.