Production of hydroquinone

Details Production of hydroquinone Production of hydroquinone

C - Chemistry, Metallurgy

07

C

260/618.3

C07C 37/00 (2006.01) C01C 1/24 (2006.01) C07C 39/08 (2006.01) C07C 209/36 (2006.01)

Patent

CA 1040659

ABSTRACT OF THE DISCLOSURE 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 main- taining the reaction medium containing the hydrogen reduction product at a temperature of 200 to 300°C. for a sufficient time to hydrolyze the reduction product to hydroquinone, and extracting the hydroquinone from the aqueous reaction medium.

243700

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