Low energy method of preparing basic copper carbonates
OwnerJeff Miller, Brian Miller +1inventors
InventorsJeff Miller, Brian Miller, Nader Mazloom
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Abstract
A method of forming basic copper carbonates includes providing an aqueous solution comprising copper (II) ammonia, and carbonic acid; and adding sufficient carbon dioxide to precipitate a basic copper carbonate from the aqueous solution.
Claims45
-10. (canceled)
A method of forming basic copper carbonate comprising:
- contacting copper (II) hydroxide with an aqueous solution comprising an amine and a sufficient amount of carbonic acid to convert at least one fourth of the copper hydroxide to basic copper carbonate;
- under conditions where the copper hydroxide is converted to basic copper carbonate;
- and recovering the basic copper carbonate.
(canceled)
A method of preparing basic copper carbonate comprising:
- (a) providing a solution of copper (II), the solution comprising copper (II), an amine, carbonic acid, and water in a reaction vessel,
- (b) adjusting the pH of the solution until basic copper carbonate is formed;
- and
- (c) recovering the basic copper carbonate.
The method according to claim 36, wherein during step (b) the molar ratio of ammonia to copper (II) in the reaction vessel ranges from about 2.7 to about 3.2;
- the temperature of the solution in the reaction vessel ranges from about 60° C. to about 75° C.;
- and the pressure in the reaction vessel ranges from about 80 psig to about 250 psig.
A method of forming azurite comprising:
- contacting copper metal with an aqueous solution comprising:
- an amine;
- carbonic acid;
- and oxygen, under conditions where the copper metal is converted into azurite;
- and recovering the azurite.
A method of forming basic copper carbonate having the formula:
- (CuCO3)x(Cu(OH)2)y, wherein y is 1 and x is greater than 1 comprising:
- contacting copper metal with an aqueous solution comprising:
- an amine;
- carbonic acid;
- and oxygen, under conditions where the copper metal is converted into basic copper carbonate having the formula:
- (CuCO3)x(Cu(OH)2)y, wherein y is 1 and x is greater than 1;
- and recovering the basic copper carbonate having the formula:
- (CuCO3)x(Cu(OH)2)y, wherein y is 1 and x is greater than 1.
Dependencies are inferred from the claim text.