EP 2238099 A1 20101013 - IMPROVED METHOD FOR PREPARING (METH)ACRYLIC ANHYDRIDE
Title (en)
IMPROVED METHOD FOR PREPARING (METH)ACRYLIC ANHYDRIDE
Title (de)
VERBESSERTES VERFAHREN ZUR HERSTELLUNG EINES (METH)ACRYLANHYDRIDS
Title (fr)
PROCEDE AMELIORE DE PREPARATION D'ANHYDRIDE (METH)ACRYLIQUE
Publication
Application
Priority
- FR 2009050113 W 20090127
- FR 0850802 A 20080208
Abstract (en)
[origin: WO2009098422A1] The present invention relates to an improved method for preparing (meth)acrylic anhydride (A(M)A2O) by transanhydrification between (meth)acrylic acid and acetic anhydride in the presence of at least one polymerization inhibitor, in which reaction to the point of partial conversion of the reagents is carried out, followed by continuous distillation. With the method according to the invention, it is possible to produce I1A(M)A2O of very high purity under improved productivity conditions compared to existing methods while eliminating problems of reactor fouling.
IPC 8 full level
C07C 51/56 (2006.01); C07C 51/573 (2006.01); C07C 57/04 (2006.01)
CPC (source: EP US)
C07C 51/56 (2013.01 - EP US); C07C 51/573 (2013.01 - EP US)
Citation (search report)
See references of WO 2009098422A1
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 TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
FR 2927329 A1 20090814; FR 2927329 B1 20100416; BR PI0908437 A2 20151208; CN 101939283 A 20110105; CN 101939283 B 20130717; EP 2238099 A1 20101013; JP 2011511048 A 20110407; KR 20100111314 A 20101014; US 2010317892 A1 20101216; US 8097757 B2 20120117; WO 2009098422 A1 20090813
DOCDB simple family (application)
FR 0850802 A 20080208; BR PI0908437 A 20090127; CN 200980104301 A 20090127; EP 09708209 A 20090127; FR 2009050113 W 20090127; JP 2010545529 A 20090127; KR 20107019348 A 20090127; US 86303309 A 20090127