Global Patent Index - EP 2630119 A4

EP 2630119 A4 20140423 - USE OF AN ACETIC ACID WASH TO PREPARE LOW-SULFATE 5-SULFOISOPHTHALIC ACID, MONO-LITHIUM SALT

Title (en)

USE OF AN ACETIC ACID WASH TO PREPARE LOW-SULFATE 5-SULFOISOPHTHALIC ACID, MONO-LITHIUM SALT

Title (de)

VERWENDUNG EINER ESSIGSÄURESTRÖMUNG ZUR HERSTELLUNG VON 5-SULFOISOPHTHALINSÄURE UND EINEM MONO-LITHIUM-SALZ MIT GERINGEM SCHWEFELANTEIL

Title (fr)

UTILISATION D'UN LAVAGE À L'ACIDE LACTIQUE POUR PRÉPARER UN SEL MONOLITHIÉ DE L'ACIDE 5 SULFO-ISOPHTALIQUE PAUVRE EN SULFATE

Publication

EP 2630119 A4 20140423 (EN)

Application

EP 11834767 A 20110329

Priority

  • US 2010053186 W 20101019
  • US 2011030252 W 20110329

Abstract (en)

[origin: WO2012054097A1] 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.

IPC 8 full level

C07C 303/32 (2006.01); C07C 303/44 (2006.01); C07C 309/58 (2006.01)

CPC (source: EP)

C07C 303/32 (2013.01); C07C 303/44 (2013.01)

C-Set (source: EP)

  1. C07C 303/32 + C07C 309/58
  2. C07C 303/44 + C07C 309/58

Citation (search report)

  • [E] WO 2011049940 A2 20110428 - FUTUREFUEL CHEMICAL CO [US], et al
  • [A] DATABASE WPI Week 200880, Derwent World Patents Index; AN 2008-N70392, XP002721622
  • See also references of WO 2012054097A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

WO 2012054097 A1 20120426; WO 2012054097 A8 20130530; CA 2815049 A1 20120426; EP 2630119 A1 20130828; EP 2630119 A4 20140423; JP 2014502956 A 20140206; JP 5760089 B2 20150805; MX 2013004254 A 20130603

DOCDB simple family (application)

US 2011030252 W 20110329; CA 2815049 A 20110329; EP 11834767 A 20110329; JP 2013534897 A 20110329; MX 2013004254 A 20110329