Method for producing biphenols from monophenols

Details Method for producing biphenols from monophenols Method for producing biphenols from monophenols

2006-04-05

2010-06-15

Nazario-Gonzalez, Porfirio (Department: 1621)

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

Organic compounds

Oxygen containing

C568S730000, C568S722000, C568S727000, C568S803000

Reexamination Certificate

active

07737310

ABSTRACT:
A process for preparing biphenols of the general formula Iby reaction of monophenols of the general formula IIwhere the radicals R1, R2 and R3 are each, independently of one another, hydrogen, alkyl, aryl or arylalkyl having from 1 to 10 carbon atoms, in the presence of an oxidant in a reactor, whereina) the reactor comprises no stationary internals which act as baffles,b) a total of not more than 0.6 mol of oxidant is used per one mol of monophenol, andc) the oxidant is introduced either continuously or discontinuously in a plurality of portions over a period of from 10 minutes to 24 hours, with the amount of oxidant introduced per unit time not being constant over the total period of time but instead being varied.

REFERENCES:
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patent: 5981772 (1999-11-01), Foo et al.
patent: 6077979 (2000-06-01), Qiu
patent: 03/045883 (2003-06-01), None
patent: WO 03/045883 (2003-06-01), None
patent: 2004069779 (2004-08-01), None
patent: 2004076464 (2004-09-01), None

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