Catalytic process for the conversion of toluene to equimolar amo

Details Catalytic process for the conversion of toluene to equimolar amo Catalytic process for the conversion of toluene to equimolar amo

1978-11-03

1981-04-07

Lone, Werren B.

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

Organic compounds

Carboxylic acid esters

560241, 562542, 562607, 568302, 568448, 568484, 568602, 568716, 568763, C07C 6705

Patent

active

042608082

ABSTRACT:
Equimolar amounts of phenol and formaldehyde may be prepared from oxygen and toluene. The catalytic oxidation of toluene, when carried out in the presence of acetic anhydride, forms phenyl acetate and methylene diacetate. Pyrolysis of these two intermediates yields phenol and formaldehyde.
Significant improvements in this process are achieved when the first stage of the reaction is carried out in the presence of MoO.sub.3.
In a further embodiment of this invention it has been found that Group VIII dithiosemibenzil compounds, particularly nickel dithiosemibenzil, serves as a superior promoter for the toluene oxidation reaction.
In still a further embodiment of this invention it has been found that persulfate promoters such as potassium persulfate, persulfuric acid, or Caro's dry acid are particularly effective promoters for the toluene oxidation reaction.
In a like manner, hydroquinone or resorcinol may be obtained from cresyl acetates.

REFERENCES:
patent: 1595299 (1962-08-01), Hale
patent: 2456597 (1948-12-01), Schlesman
patent: 3590081 (1971-06-01), Ishida et al.
patent: 3804906 (1974-04-01), McAvoyv
patent: 4056572 (1977-11-01), Bashkirov et al.
patent: 4191839 (1980-04-01), Lyons
Grozhan et al., Doklady Akad. Nauk, SSS 204 N 4,872 (1972).
Shuikin et al., Chem. Abstract, V. 56, p. 3390 (1962).

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