Process for the manufacture of polyphenols

Details Process for the manufacture of polyphenols Process for the manufacture of polyphenols

2006-05-04

2010-10-26

Davis, Brian J (Department: 1621)

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

Organic compounds

Oxygen containing

C568S727000

Reexamination Certificate

active

07820866

ABSTRACT:
An improved process for the manufacture of a polyphenol compound such as bisphenol-A by introducing into a reaction zone a phenolic compound reactant, a carbonyl compound reactant, and a catalyst promoter comprising bismethylthiopropane added to the reaction system in certain specific locations, and reacting the ingredients within the reaction zone in the presence of an acid catalyst.

REFERENCES:
patent: 2468982 (1949-05-01), Jansen
patent: 2602821 (1952-07-01), Luten, Jr. et al.
patent: 2730552 (1956-01-01), Williamson
patent: 6465697 (2002-10-01), Palmer et al.
patent: 0112615 (1984-07-01), None
patent: 63023830 (1988-02-01), None
patent: 02/059069 (2002-08-01), None
patent: 02083611 (2002-10-01), None

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