Process for producing 4,4'-dihydroxybiphenyl

Details Process for producing 4,4'-dihydroxybiphenyl Process for producing 4,4'-dihydroxybiphenyl

1980-10-14

1982-07-20

Trousof, Natalie

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

Organic compounds

Oxygen containing

568750, C07C 3702, C07C 3772, C07C 3784

Patent

active

043407684

ABSTRACT:
4,4'-Dihydroxybiphenyl is produced by hydrolyzing 4,4'-dibromobiphenyl in the presence of a copper compound catalyst in an alkaline aqueous solution; extracting by-products from the alkaline aqueous solution with an alcohol or ketone which forms an organic phase; neutralizing or acidifying the alkaline aqueous solution with an acid; extracting the reaction product with the specific solvent; and crystallizing the reaction product from the extracted solution to obtain 4,4'-dihydroxybiphenyl having high purity.

REFERENCES:
patent: 2675412 (1954-04-01), Herbert et al.
patent: 2948758 (1960-08-01), Filar
patent: 3155734 (1964-11-01), Merkel
patent: 3413341 (1968-11-01), Bursack et al.
patent: 3894095 (1975-07-01), Pietzsch et al.
patent: 4113974 (1978-09-01), Mark et al.

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