Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
USE OF AN ACETIC ACID WASH TO PREPARE LOW-SULFATE 5-SULFOISOPHTHALIC ACID, MONO-LITHIUM SALT
Document Type and Number:
WIPO Patent Application WO/2012/054097
Kind Code:
A8
Abstract:
There is disclosed a process for making a mono-lithium salt of 5-sulfoisophthalic acid (LiSIPA) having less than 500 ppm sulfate. The process uses a reaction mixture of water, a lithium cation producing compound, and 5-sulfoisophthalic acid. The reaction mixture is heated to reflux, cooled, filtered and washed with acetic acid to obtain a high quality LiSIPA having less than 500 ppm sulfate. Also disclosed is a high quality, non-purified reaction product containing a mono-lithium salt of 5-sulfoisophthalic acid and having less than 500 ppm sulfate.

Inventors:
OSTER TIMOTHY A (US)
COLEMAN MICHAEL TODD (US)
Application Number:
PCT/US2011/030252
Publication Date:
May 30, 2013
Filing Date:
March 29, 2011
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
FUTURE FUEL CHEMICAL COMPANY (US)
OSTER TIMOTHY A (US)
COLEMAN MICHAEL TODD (US)
International Classes:
C07C303/32; C07C303/44; C07C309/58
Attorney, Agent or Firm:
BAKER, Stanley (P.O. Box 418, Fayetteville AR, US)
Download PDF: