A PROCESS FOR PURIFICATION OF CRUDE METHYL METHACRYLATE

A PROCESS FOR PURIFICATION OF CRUDE METHYL METHACRYLATE

A process for purifying a crude methyl methacrylate (MMA) stream is described, typically from one or more depolymerised (co)polymers comprising methyl methacrylate (MMA). The stream comprises MMA at a level of at least 80 wt% and ethyl acrylate (EA). The process includes the steps of:- fractionally...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HJALMARSSON, Lars Anders Nicklas, CLARKE, Adam James
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:A process for purifying a crude methyl methacrylate (MMA) stream is described, typically from one or more depolymerised (co)polymers comprising methyl methacrylate (MMA). The stream comprises MMA at a level of at least 80 wt% and ethyl acrylate (EA). The process includes the steps of:- fractionally crystallising the said MMA stream to provide a fractionally crystallised MMA stream having a reduced EA content relative to the MMA stream immediately prior to fractional crystallisation.