US PATENT SUBCLASS 423 / 360
.~.~.~ With exchanging heat between catalyst and synthesis or effluent gas

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

351  DF  NITROGEN OR COMPOUND THEREOF (EXCEPT AMMONIUM SALT OF NON-NITROGEN ACID) {5}
352  DF  .~ Ammonia or ammonium hydroxide {6}
359  DF  .~.~ From elemental hydrogen and nitrogen {3}
360.~.~.~ With exchanging heat between catalyst and synthesis or effluent gas

DEFINITION

Classification: 423/360

(under subclass 359) Processes including the step of exchanging heat values between a catalyst used in the process and the mixture of gases either prior to, or subsequent to, the reaction.