Process for preparing diphenylamines

Details Process for preparing diphenylamines Process for preparing diphenylamines

1976-04-15

1977-11-08

Wyman, Daniel E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252465, 252470, 252471, 252472, 252474, 260576, C07C 8754, C07C 9116, C07C 9118

Patent

active

040575810

ABSTRACT:
Diphenylamines having the formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are the same or different and are hydrogen, alkyl with up to 4 C atoms or alkoxy with up to 4 C atoms,
Are prepared by catalytically dehydrogenating the corresponding wholly or partially hydrogenated diphenylamines. The catalyst used is a nickel/chromium catalyst containing manganese and/or aluminum and/or copper and/or sulphates of the alkali metals or alkaline earth metals.

REFERENCES:
patent: 3953508 (1976-04-01), Kalopissis et al.

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