Process for the preparation of para-benzoquinone

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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568772, C07C 4516, C07C 4964

Patent

active

042083397

ABSTRACT:
p-Benzoquinone is prepared by oxidizing phenol with molecular oxygen or with a gas in which oxygen is present, in the liquid phase, in the presence of cuprous or cupric ions. The improvement resides in carrying out the reaction in the presence of a metal, in the metallic form, which is selected from the group consisting of nickel, iron, tin, cobalt, chromium, molybdenum, magnesium and copper. The resultant p-benzoquinone is useful as an industrial source of hydroquinone, which is employed in photography.

REFERENCES:
patent: 3549670 (1970-12-01), Spousta
patent: 3870731 (1975-03-01), Hutchings
patent: 3935247 (1976-01-01), Kothari

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