US PATENT SUBCLASS 423 / 76
.~.~.~ Titanium, zirconium, or hafnium

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  DF  .~ Group IVB metal (Ti, Zr, or Hf) {11}
75  DF  .~.~ Volatizing {1}
76.~.~.~ Titanium, zirconium, or hafnium {3}
77  DF  .~.~.~.~> Removing undesirable matter from vapor
78  DF  .~.~.~.~> Specified physical form of feed solids
79  DF  .~.~.~.~> Contacting feed solids with chlorine gas

DEFINITION

Classification: 423/76

(under subclass 75) Processes in which titanium, zirconium or hafnium is volatized in elemental or compound form.

(1) Note. This subclass includes processes where an impure chloride is purified by distillation of the Group IVB metal chloride.