Process for selective methylation of phenols

Details Process for selective methylation of phenols Process for selective methylation of phenols

1975-09-04

1976-05-25

Morgenstern, Norman

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252462, 252475, 260624C, 260626R, 260626T, C07C 3716

Patent

active

039593940

ABSTRACT:
Phenols such as phenol, o-cresol, m-cresol, p-cresol, xylenols, ethylphenol, propylphenol, and butylphenol are selectively methylated in ortho-position with methanol in the vapour phase at an elevated temperature, for example, 300.degree. to 500.degree.C, under a pressure of 0.5 to 20 atmospheres absolute at a space velocity of 100 to 2000 hr.sup..sup.-1 in the presence of a three-component catalyst consisting of cerium oxide, magnesium oxide and germanium oxide, or a four-component catalyst consisting of cerium oxide, magnesium oxide, germanium oxide and tin oxide.

REFERENCES:
patent: 3347936 (1967-10-01), Froitzheim et al.
patent: 3645915 (1972-02-01), Stiles
patent: 3701811 (1972-10-01), Nicklin
patent: 3790641 (1974-02-01), Oshima et al.

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