Process for preparing cyclohexanones by hydrogenation of the cor

Details Process for preparing cyclohexanones by hydrogenation of the cor Process for preparing cyclohexanones by hydrogenation of the cor

1998-06-29

2000-01-18

Geist, Gary

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

568376, 568799, 568814, C07C 4529

Patent

active

060159278

ABSTRACT:
Substituted or unsubstituted cyclohexanones are advantageously prepared by hydrogenation of the corresponding phenols in the presence of a palladium-on-carbon catalyst at from 100 to 250.degree. C. and from 1 to 20 bar of hydrogen pressure if the reaction is carried out in the presence of straight-chain, branched or cyclic alkanes having a boiling point at atmospheric pressure of over 70.degree. C. as solvents. This makes it possible to obtain substituted or unsubstituted cyclohexanones in short hydrogenation times and in high yields using low-toxicity, physically problem-free solvents which are easy to handle from a safety point of view.

REFERENCES:
patent: 2829166 (1958-04-01), Joris et al.
patent: 3076810 (1963-02-01), Duggan et al.
patent: 3998884 (1976-12-01), Gibson
patent: 4200553 (1980-04-01), Van Peppen et al.
patent: 4304943 (1981-12-01), Bjornson
Nishimura et al, Bull.Chem.Soc.Jpn., 65, 2955-2959, 1992.

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