US PATENT SUBCLASS 423 / 550
.~.~.~.~.~ Ammonia from waste gas

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

511  DF  SULFUR OR COMPOUND THEREOF {4}
512.1  DF  .~ Oxygen containing {11}
544  DF  .~.~ Sulfate {7}
545  DF  .~.~.~ Ammonium containing {4}
549  DF  .~.~.~.~ Employing sulfuric acid as reactant {1}
550.~.~.~.~.~ Ammonia from waste gas

DEFINITION

Classification: 423/550

(under subclass 549) Processes wherein sulfuric acid is contacted with waste gases containing ammonia to form ammonium sulfate.