Title:
USE OF AN ACETIC ACID/WATER SOLVENT MIXTURE FOR THE PREPARATION OF LOW-SULFATE 5-SULFOISOPHTHALIC ACID, MONO-LITHIUM SALT FROM 5-SULFOISOPHTHALIC ACID
Document Type and Number:
WIPO Patent Application WO/2011/049940
Kind Code:
A3
Abstract:
There is disclosed a process for making a mono-lithium salt of 5-sulfoisophthalic acid (LiSIPA) having less than 200 ppm sulfate. The process uses a reaction mixture of acetic acid, water, a lithium cation producing compound, and 5-sulfoisophthalic acid. The reaction mixture is heated to reflux, cooled, filtered and washed to obtain a high quality LiSIPA having less than 200 ppm sulfate. Also disclosed is a high quality mono-lithium salt of 5-sulfoisophthalic acid having less than 200 ppm sulfate.
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Inventors:
OSTER TIMOTHY A (US)
COLEMAN MICHAEL TODD (US)
COLEMAN MICHAEL TODD (US)
Application Number:
PCT/US2010/053186
Publication Date:
September 15, 2011
Filing Date:
October 19, 2010
Export Citation:
Assignee:
FUTUREFUEL CHEMICAL CO (US)
OSTER TIMOTHY A (US)
COLEMAN MICHAEL TODD (US)
OSTER TIMOTHY A (US)
COLEMAN MICHAEL TODD (US)
International Classes:
C07C303/22; C07C303/44; C07C309/58
Foreign References:
| US20020169273A1 | 2002-11-14 | |||
| US20070088133A1 | 2007-04-19 | |||
| US6133382A | 2000-10-17 | |||
| US20040242838A1 | 2004-12-02 |
Other References:
See also references of EP 2491012A4
Attorney, Agent or Firm:
BAKER, Stanley (P.O. Box 418, Fayetteville AR, US)
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