US PATENT SUBCLASS 423 / 471
.~.~ Recovery or purification


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

462  DF  HALOGEN OR COMPOUND THEREOF {10}
470  DF  .~ Ammonium halide {1}
471.~.~ Recovery or purification


DEFINITION

Classification: 423/471

(under subclass 470) Products or processes in which the ammonium halide is obtained by separation or purification from a mixture (usually waste material).

SEE OR SEARCH THIS CLASS, SUBCLASS:

237, for a process of preparing an ammonium halide from the ammonia in waste gas where the main intent is to purify the gas, the halide being recovered as a by-product and the recovery being of secondary importance.