EP 3024809 A1 20160601 - A METHOD TO OBTAIN BISPHENOL A
Title (en)
A METHOD TO OBTAIN BISPHENOL A
Title (de)
VERFAHREN ZUR GEWINNUNG VON BISPHENOL A
Title (fr)
PROCÉDÉ POUR OBTENIR DU BISPHÉNOL A
Publication
Application
Priority
- PL 40481913 A 20130722
- PL 2014000071 W 20140702
Abstract (en)
[origin: WO2015012705A1] The subject of the invention is a two- and three-step method to obtain Bisphenol A. Bisphenol A is obtained by condensing phenol with acetone in the presence of an acidic ion-exchange resin in which part of its sulfonic groups have been neutralized with 2,2-dimethyl-l,3-thiazolidine or cysteamine, in a single reactor which is divided into three reaction zones by filtration-slot nozzles whereupon Bisphenol A is separated from the resulting post-reaction mixture by way of one- or two-step suspension-crystallization, adduct decomposition and distilling-off of phenol. In an embodiment of the invention, the resulting Bisphenol A is subjected to falling-film fractional crystallization.
IPC 8 full level
C07C 37/20 (2006.01); C07C 39/16 (2006.01)
CPC (source: EP)
C07C 37/20 (2013.01); C07C 37/84 (2013.01)
Citation (search report)
See references of WO 2015012705A1
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2015012705 A1 20150129; EP 3024809 A1 20160601; PL 221981 B1 20160630; PL 404819 A1 20150202
DOCDB simple family (application)
PL 2014000071 W 20140702; EP 14744653 A 20140702; PL 40481913 A 20130722