Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1995-09-07
1997-04-29
Burn, Brian M.
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
502326, C07C20922
Patent
active
056250975
ABSTRACT:
The preparation of optionally substituted diphenylamine by reaction of optionally substituted aniline with optionally substituted cyclohexanone using a supported Rh catalyst containing rhodium or a combination of rhodium with another platinum metal from the group of palladium, platinum, ruthenium or iridium and which can additionally contain chromium, manganese, alkali metal and a sulphur compound is described. The catalyst of the invention is prepared from halide-free starting materials. The Rh catalyst is distinguished by a low dependence of the initial selectivity, the selectivity in the run-in state and the running-in time on the conditions of the reductive pretreatment and requires only short running-in times to the optimum state.
REFERENCES:
patent: 4729977 (1988-03-01), Immel et al.
patent: 5196592 (1993-03-01), Immel et al.
patent: 5338885 (1994-08-01), Immel et al.
Buysch Hans-Josef
Darsow Gerhard
Klee Rudolf J.
Mendoza-Frohn Christine
Notheis Ulrich
Bayer Aktiengesellschaft
Burn Brian M.
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