Process for preparing purified bis(3,5-dialkyl-4-hydroxyphenyl)

Details Process for preparing purified bis(3,5-dialkyl-4-hydroxyphenyl) Process for preparing purified bis(3,5-dialkyl-4-hydroxyphenyl)

1981-05-01

1983-05-17

Daus, Donald G.

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

Organic compounds

Sulfur containing

528171, C07C14710

Patent

active

043841430

ABSTRACT:
Purified bis(3,5-dialkyl-4-hydroxyphenyl) sulfone useful for production of improved carbonate polymer is described. This sulfone is precipitated by deammoniation of an aqueous solution and then removed from the supernatant solution. This produces a product having minimal phenol sulfonic impurities. It may be employed to form carbonate polymer having improved physical properties.

REFERENCES:
patent: 3277183 (1966-10-01), Heller et al.
patent: 3383421 (1968-05-01), Fox et al.
patent: 3737409 (1973-06-01), Fox

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