Process for producing cyclohexanone

Details Process for producing cyclohexanone Process for producing cyclohexanone

1978-10-16

1980-04-29

Konopka, P. E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252444, 260586P, 568749, B01J 2118, B01J 2358, C07C 4500

Patent

active

042005531

ABSTRACT:
In a process for producing cyclohexanone comprising hydrogenating phenol in the liquid phase in the presence of a catalyst composed of a carrier having deposited thereon a layer of palladium and an alkali metal compound as a promoter, the improvement wherein the carrier consists of carbon particles having diameters of 5 to 300 microns and the catalyst is admixed with 0.1 to 10 parts by weight, per part of catalyst, of carbon particles having diameters less than 5 microns. This improvement effectively reduces long-term accumulation of catalyst poisons on the catalyst, including catalyst poisons that are by-products of the hydrogenation reaction.

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patent: 3542863 (1970-11-01), Zimmershied
patent: 3692845 (1972-09-01), Cheema et al.
patent: 3959382 (1976-05-01), Yeh et al.
patent: 3965187 (1976-06-01), Little et al.

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