Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1979-12-20
1982-04-06
Lewis, Michael L.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 05B, 75 72, 75101R, 75114, 75117, B22F 900
Patent
active
043233902
ABSTRACT:
Copper powder is produced from brass by reacting the brass with hydrochloric acid in an oxygen-free atmosphere at a temperature of at least 70.degree. C. until the non-copper metals and impurities of the brass are dissolved, oxidizing at least 10 percent by weight of the resulting copper to copper oxides, grinding the copper-copper oxide to a powder and removing the copper oxides of the powder to obtain a pure copper powder.
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Dunbar, R. E., General Chemistry revised edition, Littlefield, Adams & Co., Paterson, N.J., p. 170 (1964).
Abrams, R. B., "The Dezincification of Brass" Trans. of the Am. Electrochemical Soc., pp. 39-50 (1923).
Colegate, G. T., "Dezincification" Metal Industry, (12/24/48) pp. 507-509.
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Frahm, Jr. Veryl H.
Kruesi Paul R.
Lewis Michael L.
Southern Foundry Supply Company
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