EP 1098867 A1 20010516 - METHOD FOR PRODUCING ACRYLIC ACID
Title (en)
METHOD FOR PRODUCING ACRYLIC ACID
Title (de)
VERFAHREN ZUR HERSTELLUNG VON ACRYLSÄURE
Title (fr)
PROCEDE DE PRODUCTION D'ACIDE ACRYLIQUE
Publication
Application
Priority
- DE 19833049 A 19980722
- EP 9905204 W 19990721
Abstract (en)
[origin: DE19833049A1] In a process for production of acrylic acid by catalytic gas-phase oxidation of a 3C feedstock, the gaseous product is worked up by condensation followed by crystallization of acrylic acid by evaporation under vacuum, both the mother liquor from crystallization and the evaporated solution being at least partly recycled to the condensation stage. The production of acrylic acid comprises: (a) catalytic gas-phase oxidation of 3C alkanes, alkenes, alkanols and/or alkanals and/or precursors thereof to acrylic acid, (b) condensation of the gaseous product mixture, (c) crystallization of acrylic acid by partial evaporation of the solution obtained under vacuum, (d) separation of the crystals from the mother liquor, (e) recycling at least part of the mother liquor from (d) to stage (b) and (f) recycling at least part of the evaporated solution from (c) to stage (b).
IPC 1-7
IPC 8 full level
C07C 51/225 (2006.01); C07C 51/43 (2006.01); C07C 57/05 (2006.01); C07C 57/07 (2006.01)
CPC (source: EP KR US)
C07C 51/43 (2013.01 - EP KR US)
Citation (search report)
See references of WO 0005188A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DE 19833049 A1 20000127; BR 9912344 A 20010417; CN 1311766 A 20010905; EP 1098867 A1 20010516; ID 27390 A 20010405; JP 2002521353 A 20020716; JP 4520637 B2 20100811; KR 20010072021 A 20010731; US 6433222 B1 20020813; WO 0005188 A1 20000203
DOCDB simple family (application)
DE 19833049 A 19980722; BR 9912344 A 19990721; CN 99809126 A 19990721; EP 9905204 W 19990721; EP 99939391 A 19990721; ID 20010163 A 19990721; JP 2000561145 A 19990721; KR 20017000929 A 20010120; US 76498501 A 20010122