METHOD FOR PURIFIYING SORBATE

WIPO Patent Application WO/2017/201664

A1

Disclosed is a method of removing residual sorbic acid from a crude mixture containing a sorbate and sorbic acid comprising the steps of contacting a mixture comprising sorbic acid and a sorbate with a macroporous ion exchange resin functionalized with ammonium hydroxide groups at a concentration of at least 1.01 equivalents based on the equivalents of acids in the mixture to reduce the concentration of the sorbic acid in the mixture by at least 50％; then separating the ion exchange resin from the mixture to forma purified disorbate with a reduced concentration of sorbic acid. The method provides an efficient way of purifying and recovering sorbates, which are useful as low VOC coalescents for coatings formulations.

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ARUMUGAM SELVANATHAN (US)
ELL JOHN (US)
WANG WEI (US)
ZHANG STEVEN (CN)

PCT/CN2016/083102

November 30, 2017

May 24, 2016

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ROHM & HAAS (US)
DOW GLOBAL TECHNOLOGIES LLC (US)
ARUMUGAM SELVANATHAN (US)
ELL JOHN (US)
WANG WEI (US)
ZHANG STEVEN (CN)

C07C69/602; C07C67/08; C07C67/48; C07C67/56

WO2015124458A1	2015-08-27
WO2016061756A1	2016-04-28

US20150361290A1

2015-12-17

SHANGHAI PATENT & TRADEMARK LAW OFFICE, LLC (CN)

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