Process for the production of o-phenylphenol

Details Process for the production of o-phenylphenol Process for the production of o-phenylphenol

1975-02-18

1977-01-11

Morgenstern, Norman

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260586C, C07C 4500, C07C 3706

Patent

active

040026930

ABSTRACT:
A method of preparing an o-phenyl phenol from a cyclohexanone which comprises the steps of forming an o-cyclohexenyl cyclohexanone from the cyclohexanone by condensing the cyclo-hexanone in the presence of an inherently sulphur-free condensation catalyst, and then dehydrogenating the resulting o-cyclohexenyl cyclohexanone by contacting the o-cyclohexenyl cyclohexanone with a dehydrogenation catalyst in the presence of sufficient sulphur in the form of elemental sulphur or an organo-sulphur compound to improve the selectivity of the dehydrogenation catalyst with respect to the formation of o-phenyl phenol.

REFERENCES:
patent: 1862000 (1932-06-01), Britton et al.
patent: 1879337 (1932-09-01), Laage
patent: 2503641 (1950-04-01), Taylor et al.
patent: 3637870 (1972-01-01), Berthoux et al.
Freifelder, "Practical Catalytic Hydrogenation," pp. 35-39, John Wiley & Sons (1971).
Plesek, "Coll. Czech. Chem. Comm.," vol. 21, pp. 375-381, (1956).

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