Process for conversion of phenol to hydroquinone and quinones

Details Process for conversion of phenol to hydroquinone and quinones Process for conversion of phenol to hydroquinone and quinones

2005-03-29

2005-03-29

Richter, Johann (Department: 1621)

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

Organic compounds

Oxygen containing

C568S763000, C568S771000, C552S293000

Reexamination Certificate

active

06872857

ABSTRACT:
The present invention relates to a process for the conversion of phenol to hydroquinone and quinones. More particularly this invention relates to a process for the oxidation of phenol to a mixture of 1,4-benzoquinone and hydroquinone using an oxidant in the presence of titanium superoxide as a reusable catalyst in a liquid phase condition.

REFERENCES:
patent: 4317745 (1982-03-01), Hsieh
patent: 4396783 (1983-08-01), Esposito et al.
patent: 4442036 (1984-04-01), Hsu et al.
patent: 4478752 (1984-10-01), Hsu et al.
patent: 4482493 (1984-11-01), Matsumoto et al.
patent: 5493061 (1996-02-01), Ratnasamy et al.

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