EP 2421816 A2 20120229 - METHOD FOR PRODUCING METHYLENE DIPHENYL DIAMIN (MDA) PAST THE AMINAL STAGE
Title (en)
METHOD FOR PRODUCING METHYLENE DIPHENYL DIAMIN (MDA) PAST THE AMINAL STAGE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON METHYLENDIPHENYLDIAMIN (MDA) ÜBER DIE STUFE DES AMINALS
Title (fr)
PROCÉDÉ DE PRODUCTION DE MDA EN PASSANT PAR L'ÉTAPE DE L'AMINAL
Publication
Application
Priority
- EP 2010055126 W 20100419
- EP 09158207 A 20090420
- EP 10715797 A 20100419
Abstract (en)
[origin: WO2010121990A2] The invention relates to a method for producing methylene diphenyl diamine (MDA) comprising the following steps a) to c): a) converting formaldehyde and aniline to an aminal, (b) removing water from the aminal obtained in step a), wherein a water content of 0 to 5 wt. % based on the aminal is set, and c) adding an acid catalyst to the aminal with a water content of 0 to 5 wt. %, characterized in that in step a) formaldehyde is used as a highly concentrated formaldehyde with a CH2O content > 50 wt. % and the formaldehyde is produced by the oxidative dehydrogenation of methanol.
IPC 8 full level
C07C 209/62 (2006.01); C07C 209/78 (2006.01); C07C 211/50 (2006.01)
CPC (source: EP KR US)
C07C 209/62 (2013.01 - EP KR US); C07C 209/78 (2013.01 - EP KR US); C07C 211/55 (2013.01 - KR)
Citation (search report)
See references of WO 2010121990A2
Designated contracting state (EPC)
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 2010121990 A2 20101028; WO 2010121990 A3 20101223; CN 102405208 A 20120404; CN 102405208 B 20150225; EP 2421816 A2 20120229; JP 2012524046 A 20121011; KR 20110138288 A 20111226; US 2012035396 A1 20120209; US 8710267 B2 20140429
DOCDB simple family (application)
EP 2010055126 W 20100419; CN 201080017676 A 20100419; EP 10715797 A 20100419; JP 2012505185 A 20100419; KR 20117027565 A 20100419; US 201013265271 A 20100419