US PATENT SUBCLASS 564 / 333
.~.~.~.~.~.~ Hydrochloric acid utilized


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}
315  DF  .~.~.~ Two aryl rings or ring systems bonded directly to the same carbon {7}
330  DF  .~.~.~.~ Diamino diphenyl methanes (i.e., two phenyls, each having amino nitrogen bonded directly thereto, bonded directly to the carbon) {3}
331  DF  .~.~.~.~.~ Preparing by reacting carbonyl containing compound with amino nitrogen containing compound {2}
333.~.~.~.~.~.~ Hydrochloric acid utilized


DEFINITION

Classification: 564/333

(under subclass 331) Processes wherein the reaction is carried out in the presence of hydrochloric acid.