Disproportionation of xylenols with phenol to form cresols

Details Disproportionation of xylenols with phenol to form cresols Disproportionation of xylenols with phenol to form cresols

1976-03-26

1977-11-29

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260621E, 260624E, C07C 3904

Patent

active

040605604

ABSTRACT:
Xylenols are disproportionated with phenol over catalysts such as tungsten oxide promoted magnesium oxide, preferably in the presence of water. The reaction selectively removes methyl groups ortho to the hydroxyl group. Catalysts which can be used are magnesium oxide promoted with zinc oxide, tungsten oxide, and uranium oxide.

REFERENCES:
patent: 2295675 (1942-09-01), Meharg et al.
patent: 3417149 (1968-12-01), Neworth et al.
patent: 3446856 (1969-05-01), Hamilton
patent: 3479410 (1969-11-01), Hamilton
patent: 3998892 (1976-12-01), Leach
Jelineh, "Chem. Abstracts", vol. 55, 7357 (1961).

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