EP 3197860 A1 20170802 - METHOD FOR PRODUCING DIESTERS OF TEREPHTHALIC ACID WITH ENRICHMENT OF RECIRCULATED ALCOHOL
Title (en)
METHOD FOR PRODUCING DIESTERS OF TEREPHTHALIC ACID WITH ENRICHMENT OF RECIRCULATED ALCOHOL
Title (de)
VERFAHREN ZUR HERSTELLUNG VON TEREPHTHALSÄUREDIESTERN MIT RÜCKALKOHOL-ANREICHERUNG
Title (fr)
PROCÉDÉ DE PRÉPARATION DE DIESTERS D'ACIDE TÉRÉPHTALIQUE COMPORTANT UN ENRICHISSEMENT PAR RECYCLAGE DE L'ALCOOL
Publication
Application
Priority
- EP 14186137 A 20140924
- EP 15153483 A 20150202
- EP 2015071578 W 20150921
Abstract (en)
[origin: WO2016046120A1] The present invention relates to a method for producing a diester of terephthalic acid by reacting terephthalic acid with at least one alcohol. In said method, terephthalic acid is suspended in the alcohol in a dispersion tank, the pre-suspension is conducted from the dispersion tank into a reactor and is reacted in the presence of an esterification catalyst. Reaction water is distilled off with the vapors in the form of an alcohol-water azeotrope, the vapors are at least partially condensed, the condensate is separated into an aqueous phase and an organic phase and the organic phase is conducted over a column in which at least part of the vapors is conducted in a counter-current to the organic phase, and the organic phase is collected in the lower region of the column and is at least partially conducted into the dispersion tank.
IPC 8 full level
C07C 67/08 (2006.01); C07C 69/82 (2006.01)
CPC (source: CN EP RU US)
B01D 3/36 (2013.01 - US); B01J 19/0013 (2013.01 - US); B01J 19/0066 (2013.01 - US); C07C 67/08 (2013.01 - CN EP RU US); C07C 67/58 (2013.01 - US); B01J 2219/00094 (2013.01 - US)
C-Set (source: CN EP US)
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 2016046120 A1 20160331; BR 112017005850 A2 20180206; CA 2962164 A1 20160331; CN 107074721 A 20170818; CN 107074721 B 20210108; EP 3197860 A1 20170802; MX 2017003926 A 20170630; RU 2665579 C1 20180831; TW 201612152 A 20160401; US 10266477 B2 20190423; US 2017297998 A1 20171019
DOCDB simple family (application)
EP 2015071578 W 20150921; BR 112017005850 A 20150921; CA 2962164 A 20150921; CN 201580051299 A 20150921; EP 15766174 A 20150921; MX 2017003926 A 20150921; RU 2017113968 A 20150921; TW 104131410 A 20150923; US 201515513775 A 20150921