US PATENT SUBCLASS 423 / 574.1
.~.~.~.~ With sulfur dioxide

Current as of: June, 1999
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423 /   HD   CHEMISTRY OF INORGANIC COMPOUNDS

511  DF  SULFUR OR COMPOUND THEREOF {4}
567.1  DF  .~ Elemental sulfur {5}
571  DF  .~.~ Reacting a sulfide {3}
573.1  DF  .~.~.~ Hydrogen sulfide {4}
574.1.~.~.~.~ With sulfur dioxide {3}
574.2  DF  .~.~.~.~.~> In inorganic liquid
575  DF  .~.~.~.~.~> Utilizing organic solvent or absorbent
576  DF  .~.~.~.~.~> Utilizing promotor containing silica or aluminum

DEFINITION

Classification: 423/574.1

With sulfur dioxide:

(under subclass 573.1) Processes including a step of reacting the hydrogen sulfide with sulfur dioxide.