US PATENT SUBCLASS 75 / 388
.~ Preparing for amalgamation, preparing and amalgamating, or breaking amalgam to produce free metal

Current as of: June, 1999
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75 /   HD   SPECIALIZED METALLURGICAL PROCESSES, COMPOSITIONS FOR USE THEREIN, CONSOLIDATED METAL POWDER COMPOSITIONS, AND LOOSE METAL PARTICULATE MIXTURES

330  DF  PROCESSES {9}
388.~ Preparing for amalgamation, preparing and amalgamating, or breaking amalgam to produce free metal {3}
389  DF  .~.~> And displacing with a metal other than Mercury(Hg)
390  DF  .~.~> Utilizing a Halogen containing agent
391  DF  .~.~> Utilizing a Nitrogen(N) containing agent

DEFINITION

Classification: 75/388

Preparing for amalgamation, preparing and amalgamating or breaking amalgam to produce free metal:

(under subclass 330) Process which is a (1) preparatory chemical process for producing an intermediate for

amalgamation, (2) preparatory chemical process followed by amalgamation or (3) chemical or physiochemical process of breaking the amalgam thus formed to liberate the desired free metal (e.g., sublimation of mercury, dissolution or displacement of the metal from the amalgam, etc.).

(1) Note. The term amalgamation under this subclass and subclasses indented hereunder is restricted to a species of amalgamation which requires the use of liquid metal (e.g., mercury, lead, zinc, alloy, etc.) to collect, to alloy or to adhere to a desired free metal without heat-melting the desired free metal.

SEE OR SEARCH CLASS

205, Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions, appropriate subclasses for electrolytic treatment of noble metal containing material or solutions thereof.

209, Classifying, Separating, and Assorting Solids, for the "so called" amalgamation processes for separation, per se, of metals (e.g., noble metal, etc.) from metal containing materials (e.g., ore, etc.).

423, Chemistry of Inorganic Compounds, for chemical processes of treating noble metal containing materials and including treating amalgam or amalgamation steps that result in a metal compound as a product and without a free metal product.