METHOD FOR PRODUCING HYDROXYALKYL(METH)ACRYLIC ACID ESTERS BY OXIDATIVE SPLITTING OF METHACROLEIN ACETALS

METHOD FOR PRODUCING HYDROXYALKYL(METH)ACRYLIC ACID ESTERS BY OXIDATIVE SPLITTING OF METHACROLEIN ACETALS

A process can be used for producing hydroxyalkyl (meth)acrylate esters, in particular hydroxyethyl methacrylate (HEMA). The process involves a first reaction of (meth)acrolein with at least one polyhydric alcohol, in particular ethylene glycol, in the presence of a first catalyst C1, wherein a first...

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Bibliographische Detailangaben
Hauptverfasser: ZSCHUNKE, Florian, RÜHLING, Andreas, AIT AISSA, Belaid, KRILL, Steffen
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:A process can be used for producing hydroxyalkyl (meth)acrylate esters, in particular hydroxyethyl methacrylate (HEMA). The process involves a first reaction of (meth)acrolein with at least one polyhydric alcohol, in particular ethylene glycol, in the presence of a first catalyst C1, wherein a first reaction product containing a cyclic acetal is obtained. The process then involves a second reaction of the first reaction product with oxygen in the presence of a second catalyst C2, wherein a second reaction product containing at least one hydroxyalkyl (meth)acrylate ester is obtained. After the first reaction, water and optionally further components, in particular (meth)acrolein and/or the polyhydric alcohol, e.g. ethylene glycol, are at least partially removed from the first reaction product.