US PATENT SUBCLASS 423 / 139
.~.~ Ion exchanging or liquid-liquid extracting

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}
138  DF  .~ Iron group metal (Fe, Co, or Ni) {7}
139.~.~ Ion exchanging or liquid-liquid extracting

DEFINITION

Classification: 423/139

(under subclass 138) Processes which include the step of (1) attracting and retaining a component of the mixture by contact with an ion exchange substance, or (2) selectively dissolving a component in one of two immiscible liquids to effect a separation; see Glossary.