Process for production of cresols

Details Process for production of cresols Process for production of cresols

1994-02-25

1995-03-21

Siegel, Alan

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

Organic compounds

Oxygen containing

568754, 568799, C07C 3708, C07C 3706

Patent

active

053997913

ABSTRACT:
There is disclosed a process for the production of cresols, including the steps of: (a) conducting oxygenation of cymene with oxygen gas or an oxygen-containing gas without any addition of an alkali, thereby obtaining a solution of oxygenation products containing tertiary and primary hydroperoxides of cymene; (b) washing the solution of oxygenation products obtained in step (a) with an aqueous alkali solution at a temperature in the range of from 10.degree. to 95.degree. C.; (c) subjecting the solution of oxygenation products obtained in step (b) to hydrogenation at a temperature in the range of from 60.degree. to 100.degree. C. to decrease the content of primary hydroperoxide in such a manner that the weight ratio of primary hydroperoxide to tertiary hydroperoxide is not greater than 1/25 (w/w); (d) subjecting the solution treated in step (c) to decomposition in the presence of a catalyst; and (e) subjecting the solution treated in step (d) to hydrogenation to obtain cresols.

REFERENCES:
patent: 4163863 (1979-08-01), Ikarashi et al.
Chem. Abs., vol. 88, 1978, p. 722 88:190380m Cresols.

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