US PATENT SUBCLASS 423 / 82
.~.~ Treating with sulfur or halogen containing acid

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}
82.~.~ Treating with sulfur or halogen containing acid {1}
83  DF  .~.~.~> Forming metallic iron or insoluble iron containing compound

DEFINITION

Classification: 423/82

(under subclass 69) Processes which include the step of reacting or contacting the mixture with an acid which contains sulfur or a halogen, e.g., H2[end subscrpt]S, H2SO4[end subscrpt], HC1, etc.