CATALYST FOR REDUCTIVE ALKYLATION OF 4-AMINO-DIPHENYLAMINE WITH ACETONE AND HYDROGEN INTO N-ISOPROPYL-N'-PHENYL-P-PHENYLENEDIAMINE AND METHOD OF PREPARATION THEREOF Russian patent published in 2002 - IPC

FIELD: organic synthesis catalysts. SUBSTANCE: catalyst containing 3-41 wt % cupric oxide and 59-67 wt % alumina is prepared by mixing aqueous solutions of cupric nitrate, aluminum nitrate, and ammonium carbonate followed by filtration of suspension, washing and granulation of resulting paste, drying, and grinding of granules into powder. The latter is calcined at 355-469 C for 4 h. EFFECT: avoided use of environmental unsafe components and increased activity and selectivity of catalyst. 2 cl, 1 tbl, 5 ex