PREPARATION OF (METH)ACRYLIC ACID

IN A PROCESS FOR THE PREPARATION OF (METH)ACRYLIC ACID FROM A MIXTURE WHICH CONTAINS (METH)ACRYLIC ACID AND A SOLVENT HAVING A BOILING POINT ABOVE THE BOILING POINT OF (METH)ACRYLIC ACID BY DISTILLATION OF THE MIXTURE IN A COLUMN WHICH IS CONNECTED TO AN EVAPORATOR AND HAS A STRIPPING SECTION AND A...

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Bibliographische Detailangaben
Hauptverfasser:	ULRICH HAMMON, GERHARD NESTLER, HOLGER HERBST
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY METALLURGY ORGANIC CHEMISTRY
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Zusammenfassung:	IN A PROCESS FOR THE PREPARATION OF (METH)ACRYLIC ACID FROM A MIXTURE WHICH CONTAINS (METH)ACRYLIC ACID AND A SOLVENT HAVING A BOILING POINT ABOVE THE BOILING POINT OF (METH)ACRYLIC ACID BY DISTILLATION OF THE MIXTURE IN A COLUMN WHICH IS CONNECTED TO AN EVAPORATOR AND HAS A STRIPPING SECTION AND A RECTIFYING SECTION, BETWEEN WHICH THE MIXTURE IS FED IN, AND A SIDE TAKE-OFF FOR THE (METH)ACRYLIC ACID, A POLYMERIZATIONINHIBITOR IS FED INTO THE COLUMN IN THE REGION OF THE TOP OF THE COLUMN AND IN THE REGION OF THE SIDE TAKE-OFF, THAT AMOUNT OF POLYMERIZATION INHIBITOR WHICH IS INTRODUCED IN THE REGION OF THE TOP OF THE COLUMN BEING SMALLER THAN THE AMOUNT INTRODUCED IN THE REGION OF THE SIDE TAKE-OFF.