Process for the preparation of basic copper carbonate

Details Process for the preparation of basic copper carbonate Process for the preparation of basic copper carbonate

1985-04-26

1987-04-21

Doll, John

Chemistry of inorganic compounds

Carbon or compound thereof

Oxygen containing

423 35, 423 42, 423429, 423604, 423DIG1, 423DIG2, 75117, 204106, C01G 300

Patent

active

046595554

ABSTRACT:
The invention relates to a process for the preparation of basic copper carbonate by reacting copper salts with alkali carbonate in aqueous solution at elevated temperatures and with stirring and subsequently isolating the copper carbonate. In this process, a waste solution from copper etching processes which contains hydrochloric acid and sodium chloride, is stirred into a 5 to 15 weight percent solution of alkali carbonate heated to 40.degree. to 70.degree. C., the pH of the solution not being allowed to fall below 6.5, and the precipitated basic copper carbonate is separated from the aqueous solution in a known manner. A light green, basic copper carbonate is obtained, which is free of copper chloride and copper oxide.

REFERENCES:
patent: 956763 (1906-02-01), Gates et al.
patent: 1011562 (1911-12-01), Bradley
patent: 1111874 (1914-09-01), Vadner
patent: 3931007 (1976-01-01), Sugano et al.
patent: 4107082 (1978-08-01), Fremont
patent: 4143231 (1979-03-01), Fremont
patent: 4303704 (1981-12-01), Courduvelis et al.
Mellor, Joseph William, A Comprehensive Treatise on Inorganic and Theoretical Chemistry, vol. III, 1946, pp. 267-280.
Hodgman, Charles D., Handbook of Chemistry and Physics, 43rd ed. (1962) Student Ed, p. 172.
Derwent publication of NL7309-042 cited as 12724v/07 to Sherwin Williams Co.

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