Process for the preparation of pure 4,4'-dihydroxybiphenyl

Details Process for the preparation of pure 4,4'-dihydroxybiphenyl Process for the preparation of pure 4,4'-dihydroxybiphenyl

1991-05-28

1993-03-23

Lone, Werren B.

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

Organic compounds

Oxygen containing

568724, 568717, 568747, 568748, C07C 3914, C07C 3770

Patent

active

051966050

ABSTRACT:
In a process for the preparation of 4,4'-dihydroxybiphenyl of high purity 4,4'-dibromobiphenyl is hydrolized in the presence of a copper compound catalyst, the insoluble materials comprising the catalyst is filtered off from the product mixture, 4,4'-dihydroxybiphenyl is precipitated by adjusting the pH and crude 4,4'-dihydroxybiphenyl separated from the product mixture is fractionally distilled to obtain substantially pure 4,4'-dihydroxybiphenyl.

REFERENCES:
patent: 3413341 (1968-11-01), Bursack
patent: 4340768 (1982-07-01), Jinbo et al.
patent: 4853487 (1989-08-01), Nonn
patent: 4891452 (1990-01-01), Nonn et al.

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