EP 4308538 A1 20240124 - NOVEL METHOD FOR CONTINUOUSLY PRODUCING METHACRYLIC ACID BY CATALYTICALLY HYDROLYZING METHYL METHACRYLATE
Title (en)
NOVEL METHOD FOR CONTINUOUSLY PRODUCING METHACRYLIC ACID BY CATALYTICALLY HYDROLYZING METHYL METHACRYLATE
Title (de)
NEUES VERFAHREN ZUR KONTINUIERLICHEN HERSTELLUNG VON METHACRYLSÄURE DURCH KATALYTISCHE HYDROLYSE VON METHYLMETHACRYLAT
Title (fr)
NOUVEAU PROCÉDÉ DE PRODUCTION EN CONTINU D'ACIDE MÉTHACRYLIQUE PAR HYDROLYSE CATALYTIQUE DE MÉTHACRYLATE DE MÉTHYLE
Publication
Application
Priority
- EP 21162491 A 20210315
- EP 2022055702 W 20220307
Abstract (en)
[origin: WO2022194590A1] The invention relates to a continuous method for producing methacrylic acid by catalytically hydrolyzing methyl methacrylate, which has been produced on the basis of C-2, C-3, or C-4 raw materials. In the process, methyl methacrylate with a high degree of purity is reacted with water in the presence of a Brönstedt catalyzer in order to form a reaction mixture containing reactants and products and is processed in a distillation column, at the head of which a condensate containing an azeotrope of MMA with methanol is generated, in the central part of which a vapor condensate is generated which contains methacrylic acid with a high degree of purity, and in the sump of which a material mixture is accumulated which contains byproducts with a high boiling temperature and little methacrylic acid.
IPC 8 full level
C07C 57/04 (2006.01); C07C 51/09 (2006.01); C07C 51/44 (2006.01)
CPC (source: EP US)
C07C 51/09 (2013.01 - EP); C07C 51/377 (2013.01 - US); C07C 51/44 (2013.01 - EP US)
Citation (search report)
See references of WO 2022194590A1
Designated contracting state (EPC)
AL 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 RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022194590 A1 20220922; CN 117043132 A 20231110; EP 4308538 A1 20240124; TW 202302513 A 20230116; US 2024034709 A1 20240201
DOCDB simple family (application)
EP 2022055702 W 20220307; CN 202280021357 A 20220307; EP 22710598 A 20220307; TW 111108775 A 20220310; US 202218550426 A 20220307