US PATENT SUBCLASS 75 / 587
.~.~.~.~ Countercurrent liquid-liquid extraction of molten Nonferrous 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}
392  DF  .~ Producing or treating free metal {10}
414  DF  .~.~ At 300 degrees C or greater (e.g., pyrometallurgy, etc.) {7}
585  DF  .~.~.~ Nonferrous {25}
587.~.~.~.~ Countercurrent liquid-liquid extraction of molten Nonferrous metal

DEFINITION

Classification: 75/587

Countercurrent liquid-liquid extraction of molten Nonferrous metal:

(under subclass 585) Process in which a molten metal is introduced into a separating column and is flowed countercurrent to a contaminated metal that contains over 50 percent by weight Nonferrous metal to purify the contaminated metal.