METHOD OF INHIBITING POLYMERIZATION AND FOULING IN ACRYLIC ACID AND ACRYLATE PROCESSES

A method of decarboxylating maleic acid to acrylic acid, the method comprising the step of contacting a solution comprising maleic acid with at least 500 ppm of an N-oxyl compound at a temperature of at least 120°C. The preferred N-oxyl compound is 4-hydroxy-TEMPO, in some cases in combination with...

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Bibliographische Detailangaben
Hauptverfasser:	BROOKS, WILLIAM, C, FRUCHEY, OLAN, S, YANG, EDMUND, J, ROUNDY, ROGER, L, REEVES, CHRISTOPHER, T
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	A method of decarboxylating maleic acid to acrylic acid, the method comprising the step of contacting a solution comprising maleic acid with at least 500 ppm of an N-oxyl compound at a temperature of at least 120°C. The preferred N-oxyl compound is 4-hydroxy-TEMPO, in some cases in combination with at least one of Mn(II) and Cu(II).