Isolation of 4,4'-dichlorodiphenyl sulfone

Details Isolation of 4,4'-dichlorodiphenyl sulfone Isolation of 4,4'-dichlorodiphenyl sulfone

1988-01-25

1989-10-10

Ceperley, Mary E.

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

Organic compounds

Sulfur containing

C07C14706

Patent

active

048733725

ABSTRACT:
A process for the isolation of 4,4'-dichlorodiphenyl sulfone from a mixture of dichlorodiphenyl sulfones in which the ratios of the masses of 2,4'-dichlorodiphenyl sulfone and 3,4'-dichlorodiphenyl sulfone to the mass of 4,4'-dichlorodiphenyl sulfone are respectively from 0.5% to 20% and from 0.5% to 30% by treating the mixture with an alkanol at temperatures of from 20.degree. C. to 250.degree. C., cooling, and separating the pure 4,4'-dichlorodiphenyl sulfone that precipitates.

REFERENCES:
patent: 3855312 (1974-03-01), Horner
patent: 4016210 (1977-04-01), Horner et al.
patent: 4242527 (1980-12-01), Mark et al.
M. Farberov et al., English Language Abstract of U.S.S.R. 833,957, May 30, 1981.
Y. Morita et al., Chem. Abstracts vol. 105, No. 60415k (1986).
Tokai Electro-Chemical Co., Chem. Abstracts, vol. 97, No. 127264x (1982).

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