US PATENT SUBCLASS 423 / 572
.~.~.~ With steam to form hydrogen 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  DF  .~.~ Reacting a sulfide {3}
572.~.~.~ With steam to form hydrogen sulfide

DEFINITION

Classification: 423/572

(under subclass 571) Processes which include the step of reacting water in its vapor or gaseous state with the sulfide to form the compound hydrogen sulfide (H2[end subscrpt]S) as an intermediary in the production of sulfur.