EP 2432757 A1 20120328 - METHOD FOR PURIFYING CARBOXYLIC ACIDS CONTAINING HALOGEN COMPOUNDS
Title (en)
METHOD FOR PURIFYING CARBOXYLIC ACIDS CONTAINING HALOGEN COMPOUNDS
Title (de)
VERFAHREN ZUR REINIGUNG VON HALOGENVERBINDUNGEN ENTHALTENDEN CARBONSÄUREN
Title (fr)
PROCÉDÉ DE PURIFICATION D'ACIDES CARBOXYLIQUES CONTENANT DES COMPOSÉS HALOGÉNÉS
Publication
Application
Priority
- EP 2010056927 W 20100519
- EP 09160841 A 20090520
- EP 10723049 A 20100519
Abstract (en)
[origin: WO2010133651A1] In a method for purifying carboxylic acids containing halogen compounds, the carboxylic acid is distilled in the presence of a heavy auxiliary base, the halide of which is liquid at the boiling point of the carboxylic acid. The auxiliary base binds the hydrogen halide contained in the carboxylic acid and/or separated from halogen compounds under a thermal effect, thus lowering the vapor pressure of the hydrogen halide such that the hydrogen halide is retained at the bottom of the distillation apparatus and does not spill over into the distillate. The fact that halide of the auxiliary base is liquid prevents the formation of solid deposits in the distillation apparatus. The carboxylic acid optionally also contains at least one light component.
IPC 8 full level
C07C 51/44 (2006.01); C07C 51/50 (2006.01); C07C 53/02 (2006.01); C07C 53/08 (2006.01)
CPC (source: EP US)
C07C 51/44 (2013.01 - EP US); C07C 51/50 (2013.01 - EP US)
Citation (search report)
See references of WO 2010133651A1
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 SE SI SK SM TR
DOCDB simple family (publication)
WO 2010133651 A1 20101125; CN 102428066 A 20120425; EP 2432757 A1 20120328; JP 2012527429 A 20121108; US 2012067715 A1 20120322
DOCDB simple family (application)
EP 2010056927 W 20100519; CN 201080021729 A 20100519; EP 10723049 A 20100519; JP 2012511284 A 20100519; US 201013321405 A 20100519