Method for making bisphenol A

Details Method for making bisphenol A Method for making bisphenol A

2007-06-05

2007-06-05

Page, Thurman K. (Department: 1621)

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

Organic compounds

Oxygen containing

C568S728000

Reexamination Certificate

active

10466814

ABSTRACT:
The continuous process for manufacturing bisphenol A according to the invention, by reacting phenol and acetone in the presence of a strong acid catalyst and a co-catalyst, is carried out using as co-catalyst a dithio ether of general formula:in which the symbols R and R′ each represent a hydrogen atom, an alkyl radical or a phenyl radical, and the symbol R″ represents an optionally substituted alkyl radical.

REFERENCES:
patent: 4517387 (1985-05-01), Matsunaga et al.
patent: 5777180 (1998-07-01), June et al.
patent: 6465697 (2002-10-01), Palmer et al.
patent: 474 155 (1975-07-01), None
patent: 474155 (1976-06-01), None
“Mercaptals”, IUPAC Compendium of Chemical Terminology, Electronic Version, 1997, URL:http://goldbook.iupac.org/M03830.pdf.
“Mercaptoles”, IUPAC Compendium of Chemical Terminology, Electronic Version, 1997, URL:http://goldbook.iupac.org/M03830.pdf.

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