Process for the purification of dihydroxybiphenyls

Details Process for the purification of dihydroxybiphenyls Process for the purification of dihydroxybiphenyls

1990-10-01

1992-02-11

Lone, Werren B.

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

Organic compounds

Oxygen containing

568724, 568748, C07C 3768, C07C 3784

Patent

active

050877682

ABSTRACT:
A process for the purification of dihydroxybiphenyls, preferably 4,4'-dihydroxybiphenyl, by acylation of the preparation medium of the dihydroxybiphenyl and selective precipitation of the biphenyl diester (diacetylbiphenyl), followed by conversion of the biphenyl diester to dihydroxybiphenyl.

REFERENCES:
patent: 2278634 (1942-04-01), Barnes
patent: 2829175 (1958-04-01), Bowman et al.
patent: 3383395 (1968-05-01), Schmulke
patent: 4170711 (1979-10-01), Orlando et al.
patent: 4885407 (1989-12-01), Fox et al.

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