US PATENT SUBCLASS 423 / 23
.~ Group IB metal (Cu, Ag, or Au)

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

1  DF  TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND {15}
23.~ Group IB metal (Cu, Ag, or Au) {10}
24  DF  .~.~> Ion exchanging or liquid-liquid extracting
25  DF  .~.~> Sorbing or magnetic separating
26  DF  .~.~> Flotation
27  DF  .~.~> Leaching, washing, or dissolving {6}
42  DF  .~.~> Forming insoluble substance in liquid {1}
44  DF  .~.~> Volatizing copper, silver, or gold
45  DF  .~.~> Sulfating
46  DF  .~.~> Halogenating
47  DF  .~.~> Desulfurizing or de-arsenating
48  DF  .~.~> Forming sulfide or matte

DEFINITION

Classification: 423/23

(under subclass 1) Processes wherein the compound comprises copper, silver or gold.

SEE OR SEARCH CLASS

75, Specialized Metallurgical Processes, Compositions for Use Therein, Consolidated Metal Powder Compositions, and Loose Metal Particulate Mixtures,

100, 117 and 118, for hydrometallurgical processes wherein

the metal values recovered consist of copper, silver or gold in elemental form.

556, Organic Compounds,

110+, for organo-metallo compounds containing copper, silver or gold or the processes for preparing such compounds. 588, Hazardous or Toxic Waste Destruction or Containment, appropriate subclasses for the destruction or containment of hazardous or toxic waste being volatilized or containing (Cu, Ag, or Au) halogens, oxygen sulfur, or nitrogen.