Process for synthesizing 4,4'-dihydroxydiphenyl sulfone

Details Process for synthesizing 4,4'-dihydroxydiphenyl sulfone Process for synthesizing 4,4'-dihydroxydiphenyl sulfone

1990-03-28

1991-08-20

Ceperley, Mary E.

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

Organic compounds

Sulfur containing

C07C31504

Patent

active

050416774

ABSTRACT:
Process for synthesizing 4,4' bisphenol sulfone involving reacting phenol and sulfuric acid in an inert reaction solvent, and maintaining the reaction solvent at temperatures of about 160 to 200.degree. C. and at a predetermined level sufficient to maintain a saturated 4,4' isomer solution and an unsaturated 2,4' isomer solution, thereby selectively yielding 4,4' bisphenol sulfone with minimal amounts of 2,4' isomer by-product.

REFERENCES:
patent: 3065274 (1962-11-01), Vegter et al.
patent: 3297766 (1967-01-01), Bradley et al.
patent: 3366692 (1968-01-01), Orem
patent: 4162270 (1979-07-01), Ogata et al.
patent: 4382147 (1983-05-01), Kitamura et al.
Hinkel et al., Chem. Society Journal (1949), p. 2854.

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