EP 2018362 A1 20090128 - PROCESS FOR PREPARING ALPHA-HYDROXYCARBOXYLIC ESTERS
Title (en)
PROCESS FOR PREPARING ALPHA-HYDROXYCARBOXYLIC ESTERS
Title (de)
VERFAHREN ZUR HERSTELLUNG VON ALPHA-HYDROXYCARBONSÄUREESTERN
Title (fr)
PROCÉDÉ DE FABRICATION D'ESTERS D'ACIDES ALPHA-HYDROXYCARBOXYLIQUES
Publication
Application
Priority
- EP 2007052951 W 20070328
- DE 102006022896 A 20060515
- DE 102007011706 A 20070308
- US 89378807 P 20070308
Abstract (en)
[origin: WO2007131829A1] The continuous process for preparing alpha-hydroxycarboxylic esters, in which the reactants reacted are alpha-hydroxycarboxamide with an alcohol in the presence of a catalyst to obtain a product mixture which comprises alpha-hydroxycarboxylic ester, ammonia, unconverted alpha-hydroxycarboxamide, and also alcohol and catalyst; wherein reactant streams comprising, as reactants, an alpha-hydroxycarboxamide, an alcohol and a catalyst are fed into a pressure reactor; the reactant streams are reacted with one another in the pressure reactor at a pressure in the range from 1 bar to 100 bar; and the product mixture is depleted in alcohol and ammonia, wherein ammonia is distilled off at a pressure which is constantly kept greater than 1 bar without the aid of additional stripping media. The continuous process is particularly advantageously employable on the industrial scale.
IPC 8 full level
C07C 67/20 (2006.01); C07C 67/54 (2006.01); C07C 69/675 (2006.01)
CPC (source: EP KR US)
C07C 67/20 (2013.01 - EP KR US); C07C 67/54 (2013.01 - EP KR US); C07C 69/675 (2013.01 - KR); Y02P 20/10 (2015.11 - EP US)
Citation (search report)
See references of WO 2007131829A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
WO 2007131829 A1 20071122; CA 2652315 A1 20071122; EP 2018362 A1 20090128; JP 2009537471 A 20091029; JP 5517610 B2 20140611; KR 101365790 B1 20140220; KR 20090009869 A 20090123; MX 2008014641 A 20081127; TW 200812957 A 20080316; TW I414512 B 20131111; US 2009182167 A1 20090716; US 8569539 B2 20131029
DOCDB simple family (application)
EP 2007052951 W 20070328; CA 2652315 A 20070328; EP 07727424 A 20070328; JP 2009510374 A 20070328; KR 20087027958 A 20070328; MX 2008014641 A 20070328; TW 96116683 A 20070510; US 29803407 A 20070328