US PATENT SUBCLASS 423 / 571
.~.~ Reacting a sulfide

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.~.~ Reacting a sulfide {3}
572  DF  .~.~.~> With steam to form hydrogen sulfide
573.1  DF  .~.~.~> Hydrogen sulfide {4}
577  DF  .~.~.~> Reacting metal sulfide with sulfur dioxide

DEFINITION

Classification: 423/571

(under subclass 567.1) Processes which include the step of using as a reactant a compound having the sulfide (S2-) ion.

(1) Note. The sulfide may be provided from any source, e.g., ores (pyrites), gas streams, etc.