Preparation of purified hydroquinone and forming of same

Details Preparation of purified hydroquinone and forming of same Preparation of purified hydroquinone and forming of same

2007-06-27

2011-12-06

Davis, Brian J (Department: 1621)

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

Organic compounds

Oxygen containing

C568S750000, C568S751000, C568S752000, C568S763000

Reexamination Certificate

active

08071817

ABSTRACT:
Purified hydroquinone is prepared and formed from raw compounds essentially containing hydroquinone associated with very small quantities of impurities including resorcinol and pyrogallol, and includes a distillation purification step in which the resorcinol and pyrogallol are eliminated, directly followed by a step in which the purified hydroquinone is formed.

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International Search Report dated Nov. 15, 2007 issued in PCT/FR2007/001079.

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