Preparation of 4,4' dichlorodiphenyl sulfone

Details Preparation of 4,4' dichlorodiphenyl sulfone Preparation of 4,4' dichlorodiphenyl sulfone

1988-01-25

1989-10-03

Ceperley, Mary E.

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

Organic compounds

Sulfur containing

C07C14706

Patent

active

048718769

ABSTRACT:
A process for the preparation of 4,4-dichlorodiphenyl sulfone by heating a mixture of (a) chlorobenzene, (b) chlorosulfonic acid or sulfur trioxide, and (c) thionyl chloride or phosgene to temperatures up to 220.degree. C., more than the stoichiometric amount (based on the amount of chlorobenzene) of chlorosulfonic acid or sulfur trioxide and less than the stoichiometric amount of thionyl chloride or phosgene being employed.

REFERENCES:
patent: 3701806 (1972-10-01), Keogh et al.
patent: 3855312 (1974-12-01), Horner
patent: 4172852 (1979-10-01), Ark et al.
patent: 4558161 (1985-12-01), Morita et al.
J. Am. Chem. Soc., 76 (1954), p. 5491, P. Kovacic et al.

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