Process for producing 4',4-dihydroxydiphenyl

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

1982-07-21

1984-08-14

Lone, Werren B.

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

Organic compounds

Oxygen containing

568738, 568769, 568795, C07C 3704, C07C 3912

Patent

active

044658788

ABSTRACT:
A process for producing 4,4'-dihydroxydiphenyl which comprises subjecting to alkali fusion 1 mol of 4,4'-diphenyldisulfonic acid and/or potassium 4,4'-diphenyldisulfonate together with 4 to 10 mol of potassium hydroxide and 0.1 to 2 mol of potassium sulfate. Alternatively, the process may comprise subjecting to alkali fusion 4,4'-diphenyldisulfonic acid in the presence of potassium hydroxide, controlling to 20 to 25% the potassium hydroxide concentration in the reaction mixture, and separating dipotassium salt of 4,4'-dihydroxydiphenyl.

REFERENCES:
patent: 2368361 (1945-01-01), Jenkins
patent: 4243822 (1981-01-01), Demler et al.
patent: 4324926 (1982-04-01), Demler et al.

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