Production of hydroquinone

Details Production of hydroquinone Production of hydroquinone

1975-01-17

1976-01-27

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260621H, 260625, C07C 3910

Patent

active

039352838

ABSTRACT:
Hydroquinone is made by contacting nitrobenzene in an aqueous acid medium with hydrogen at elevated temperatures and pressures in the presence of an acid resistant reducing catalyst until hydrogen absorption ceases, removing any unreduced nitrobenzene from the reaction medium, removing the catalyst from the reaction medium, thereafter maintaining the reaction medium containing the hydrogen reduction product at a temperature of 200.degree. to 300.degree.C. for a sufficient time to hydrolyze the reduction product to hydroquinone, and extracting the hydroquinone from the aqueous reaction medium.

REFERENCES:
patent: 2198249 (1956-10-01), Henke
patent: 2665313 (1954-01-01), Lisk
patent: 3383416 (1968-05-01), Benner
patent: 3862247 (1975-01-01), Greco

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