Method for making bisphenol A
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United States of America Patent
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Jun 5, 2007
Grant Date -
Jun 10, 2004
app pub date -
Jan 8, 2002
filing date -
Jan 23, 2001
priority date (Note) -
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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: ##STR00001## 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.
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