US PATENT SUBCLASS 423 / 69
.~ Group IVB metal (Ti, Zr, or Hf)

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}
69.~ Group IVB metal (Ti, Zr, or Hf) {11}
70  DF  .~.~> Ion exchanging or liquid-liquid extracting
71  DF  .~.~> Forming compound containing plural metals {1}
73  DF  .~.~> Separating Group IVB metals from each other
74  DF  .~.~> Utilizing fluidized bed
75  DF  .~.~> Volatizing {1}
80  DF  .~.~> Chemically converting for physical solid-solid separation
81  DF  .~.~> Treating with nitrogen or nitrogenous compound
82  DF  .~.~> Treating with sulfur or halogen containing acid {1}
84  DF  .~.~> Treating with compound containing alkali metal or alkaline earth metal
85  DF  .~.~> Forming insoluble compound containing Group IVB metal
86  DF  .~.~> Dissolving or leaching of iron

DEFINITION

Classification: 423/69

(under subclass 1) Processes wherein the compound comprises titanium, zirconium, or hafnium.

SEE OR SEARCH CLASS

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

84+, for a process in which Ti, Zr, or Hf is reduced to metallic state from a compound thereof after a treatment to separate such compounds from mixtures.

588, Hazardous or Toxic Waste Destruction or Containment, appropriate subclasses for the treatment of hazardous or toxic containing Ti, Zr, or Hf.