Process for the preparation of p-ethylphenol

Details Process for the preparation of p-ethylphenol Process for the preparation of p-ethylphenol

1988-12-06

1990-05-22

Lone, Werren B.

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

Organic compounds

Oxygen containing

568790, 568794, C07C 3714, C07C 3711

Patent

active

049279793

ABSTRACT:
A very simple process for preparing p-ethylphenol is disclosed. It is only necessary to contact phenol with an ethylating agent in vapor phase in the presence of a specific catalyst. The catalyst can be obtained by incorporating one or more alkoxysilanes to a crystalline aluminosilicte with a constraint index of 1-15 having a silica/alumina molar ratio of 20-400, wherein the amount of said alkoxysilanes to be incorporated is not less than 1.4 wt % calculated as silicon based on the amount of said crystalline aluminosilicate. Because the specific catalyst has the narrowed or restricted entrances of the micro pores of the crystalline aluminosilicate by the alkoxysilane treatment, it is possible to prepare p-ethylphenol in a high selectivity. The product contains only a very small amount of m-ethylphenol. The p-ethylphenol product obtained by the process of the present invention can be employed directly as raw materials for practical uses such as synthetic resins and antioxidants without m-ethylphenol elimination procedure.

REFERENCES:
patent: 3702886 (1972-11-01), Argauer et al.
patent: 3706807 (1972-12-01), Etherington, Jr. et al.
patent: 3709979 (1973-01-01), Chu
patent: 3728408 (1973-04-01), Tobias
patent: 3832449 (1974-08-01), Rosinski et al.
patent: 4016245 (1977-04-01), Plank et al.
patent: 4046859 (1977-09-01), Plank et al.
patent: 4371714 (1983-02-01), Young
patent: 4391998 (1983-07-01), Wu
patent: 4532368 (1985-07-01), Swanson et al.
Catalysis by Crystalline Aluminosilicates: Characterization of Intermediate Pore-Size Zeolites by the "Constraint Index": Journal of Catalysis 67, 218-222 (1981).

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