US PATENT SUBCLASS 564 / 420
.~.~.~.~.~ By direct hydrogenation


Current as of: June, 1999
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564 /   HD   ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES

*  DD  ORGANIC COMPOUNDS (Class 532, Subclass 1) {1}
1  DF  .~ AMINO NITROGEN CONTAINING (E.G., UREA, SULFONAMIDES, NITROSAMINES, OXYAMINES, ETC., AND SALTS THEREOF) {37}
305  DF  .~.~ Benzene ring containing {24}
415  DF  .~.~.~ Forming amine group directly by reduction {1}
416  DF  .~.~.~.~ Of nitro or nitroso {4}
420.~.~.~.~.~ By direct hydrogenation {2}
421  DF  .~.~.~.~.~.~> Group VI metal containing catalyst utilized
422  DF  .~.~.~.~.~.~> Group VIII metal containing catalyst utilized {1}


DEFINITION

Classification: 564/420

(under subclass 416) Processes wherein the nitro or nitroso group is reduced by addition of hydrogen.