Dihydric phenol recovery process

Details Dihydric phenol recovery process Dihydric phenol recovery process

1982-09-29

1987-06-02

Lone, Werren B.

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

Organic compounds

Oxygen containing

568570, 568576, 568771, C07C 3708

Patent

active

046706097

ABSTRACT:
An improved process for the manufacture of a dihydric phenol such as hydroquinone wherein a dialkylbenzene is oxidized to a dihydroperoxide, the dihydroperoxide being extracted from the oxidate by a caustic solution, leaving an organic phase for recycle to the oxidizer, the improvement comprising decreasing the caustic concentration in the recycle organic phase and increasing the dihydroperoxide concentration of the recycle phase by washing the organic phase from the caustic extract with an aqueous phase removed from the oxidizer, separating the organic phase from the aqueous phase and subsequently introducing the organic phase to the oxidizer.

REFERENCES:
patent: 3882600 (1975-05-01), Miller
patent: 3923908 (1975-12-01), Suda et al.
patent: 3968171 (1976-07-01), Burkholder
patent: 3978142 (1976-08-01), Burkholder
patent: 4049723 (1977-09-01), Tanaka et al.
patent: 4053520 (1977-10-01), Miller
patent: 4271321 (1981-06-01), Voges
"Process for the Production of Hydroquinone", by J. Ewers, H. W. Voge and G. Maleck, Erdoel Kohle Erdgas, Petrochem. Br. Chem., vol. 28, No. 1, 1975, pp. 34+.

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