EP 0923523 A2 19990623 - METHOD OF PREPARING ACRYLIC ACID AND METHACRYLIC ACID
Title (en)
METHOD OF PREPARING ACRYLIC ACID AND METHACRYLIC ACID
Title (de)
VERFAHREN ZUR HERSTELLUNG VON ACRYLSÄURE UND METHACRYLSÄURE
Title (fr)
PROCEDE DE PRODUCTION D'ACIDE ACRYLIQUE ET D'ACIDE METHACRYLIQUE
Publication
Application
Priority
- DE 19627850 A 19960710
- EP 9703629 W 19970709
Abstract (en)
[origin: DE19627850A1] A method of preparing acrylic acid or methacrylic acid comprises the following steps: (a) preparation of a gaseous reaction mixture which contains acrylic acid or methacrylic acid, essentially having the composition of a reaction mixture of catalytic gas-phase oxidation of C3/C4 alkanes, alkenes, alkanols and/or alkanals and/or precursors thereof to form acrylic acid or methacrylic acid, (b) absorption of the reaction product with a solvent mixture consisting of at least one lactame dissolved in at least one polar organic solvent, and (c) distillation of the reaction product-bearing solvent mixture to obtain a crude acrylic acid or crude methacrylic acid and the solvent mixture.
IPC 1-7
IPC 8 full level
C07C 57/05 (2006.01); C07C 51/44 (2006.01); C07C 51/48 (2006.01); C07C 57/07 (2006.01)
CPC (source: EP KR)
C07C 51/48 (2013.01 - EP); C07C 57/04 (2013.01 - KR); Y02P 20/582 (2015.11 - EP)
Citation (search report)
See references of WO 9801411A2
Designated contracting state (EPC)
BE DE ES FR GB IT NL
DOCDB simple family (publication)
DE 19627850 A1 19980115; BR 9710231 A 19990810; CA 2259994 A1 19980115; CN 1227537 A 19990901; EP 0923523 A2 19990623; ID 18425 A 19980409; JP 2000514076 A 20001024; KR 20000023679 A 20000425; WO 9801411 A2 19980115; WO 9801411 A3 19980625
DOCDB simple family (application)
DE 19627850 A 19960710; BR 9710231 A 19970709; CA 2259994 A 19970709; CN 97197178 A 19970709; EP 9703629 W 19970709; EP 97936631 A 19970709; ID 972394 A 19970710; JP 50480698 A 19970709; KR 19997000136 A 19990109