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US 7,776,306 B2Granted
Low energy method of preparing basic copper carbonates
AssigneePeninsula Copper Industries Incorporated
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.
Claims26
A continuous method of preparing basic copper carbonate comprising:
- (a) providing an aqueous solution of copper (II), the aqueous 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;
- (c) recovering the basic copper carbonate from the aqueous solution by subjecting the aqueous solution to filtration;
- (d) transferring the aqueous solution which remains after the recovery of basic copper carbonate in step (c) into a second vessel;
- (e) removing carbon dioxide from the aqueous solution which remains after the recovery of basic copper carbonate in step (c);
- (f) introducing a copper metal-containing material into the aqueous solution which remains after the removal of carbon dioxide in step (e);
- (g) oxidizing the copper metal-containing material to provide a replenished copper (II) solution;
- and
- (h) introducing the replenished copper (II) solution into the reaction vessel.
6 more elements
Dependencies are inferred from the claim text.