US PATENT SUBCLASS 423 / 32
.~.~.~ With ammonia or ammonium containing 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}
32.~.~.~ With ammonia or ammonium containing compound {1}
33  DF  .~.~.~.~> Specified temperature

DEFINITION

Classification: 423/32

(under subclass 27) Processes in which one of the active leaching ingredients is ammonia or an ammonium compound.

SEE OR SEARCH CLASS

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

103, for a process of obtaining a pure elemental metal and which includes the step of leaching with ammonia or an ammonium compound.