Method for making tris(hydroxyphenyl) compounds using ion exchange resins

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United States of America Patent

PATENT NO 5969167
SERIAL NO

08953057

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Abstract

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An improved method for the preparation of tris(4-hydroxyphenyl) compounds is provided. In particular, an improved method for preparing 1, 1, 1-tris(4'-hydroxyphenyl)ethane is provided which comprises heating a mixture comprising phenol and 4-hydroxy acetophenone in the presence of effective amounts of an ion exchange catalyst and a mercaptan as a copromoter such that the resulting 1, 1, 1-tris(4'-hydroxyphenyl)ethane is substantially free of various reaction impurities.

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Patent Owner(s)

Patent OwnerAddress
SABIC INNOVATIVE PLASTICS IP B V4612 PX BERGEN OP ZOOM

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chakrapani, Srinivasan Pune, IN 22 272
Kissinger, Gaylord M Evansville, IN 22 197
Mendiratta, Ashok K Westlake, OH 19 316
Ranade, Vishnu R Pune, IN 1 2
Sivaram, Swaminathan Pune, IN 41 146
Sybert, Paul D Evansville, IN 48 973
Wadgonkar, Prakash P Pune, IN 1 2

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