US PATENT SUBCLASS 423 / 29
.~.~.~ With a cyanide compound

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  DF  .~ Group IB metal (Cu, Ag, or Au) {10}
27  DF  .~.~ Leaching, washing, or dissolving {6}
29.~.~.~ With a cyanide compound {2}
30  DF  .~.~.~.~> And pressurizing
31  DF  .~.~.~.~> And agitating

DEFINITION

Classification: 423/29

(under subclass 27) Processes in which one of the active leaching ingredients is a cyanide.

SEE OR SEARCH THIS CLASS, SUBCLASS:

371+, for a cyanide compound, per se, or the process of preparing such a compound where the starting material is substantially a pure substance.

SEE OR SEARCH CLASS

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

105, for the process of obtaining a pure elemental metal and which includes the step of leaching with a cyanide compound.