US PATENT SUBCLASS 423 / 237
.~.~ Ammonia

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

210  DF  MODIFYING OR REMOVING COMPONENT OF NORMALLY GASEOUS MIXTURE {11}
235  DF  .~ Nitrogen or nitrogenous component {3}
237.~.~ Ammonia {1}
238  DF  .~.~.~> Utilizing liquid as reactant

DEFINITION

Classification: 423/237

(under subclass 235) Processes in which the component is ammonia (NH3).

SEE OR SEARCH THIS CLASS, SUBCLASS:

236, for processes of separating ammonia from a gas mixture which also includes a carbon containing nitrogen compound (e.g., a mixture of ammonia and hydrogen cyanide).

SEE OR SEARCH CLASS

95, Gas Separation: Processes, for processes of separating ammonia from a gaseous fluid mixture by physical means only. See particularly

43+, for selective diffusion of gases, subclasses 90+ for solid sorption, and subclasses 149+ for liquid contacting.