Decolorization of dihydroxydiphenyl sulfone

Details Decolorization of dihydroxydiphenyl sulfone Decolorization of dihydroxydiphenyl sulfone

1990-02-01

1991-06-18

Ceperley, Mary E.

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

Organic compounds

Sulfur containing

C07C31504

Patent

active

050250906

ABSTRACT:
Trivalent phosphorous compounds (e.g., phosphorous acid and dialkyl phosphites) if present in small amount during the reaction of phenol with a sulfonating agent or a phenol sulfonic acid yield a dihydroxydiphenyl sulfone product that is less colored.

REFERENCES:
patent: 2752398 (1956-06-01), Riley
patent: 4154964 (1979-05-01), Balg
patent: 4696774 (1987-09-01), Telschow
patent: 4822916 (1989-04-01), Aaronson et al.
patent: 4933494 (1990-06-01), Tubota et al.
Derwent Abstract of Japanese Patent 58-206,551 published Dec. 1, 1983.
Derwent Abstract of Japanese Patent 57-35,559 published Feb. 26, 1982 and English translation.

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