PRODUCTION OF ACRYLIC OR METHACRYLIC ACID

PURPOSE:The gas-phase oxidation of acrolein or methacrolein with molecular oxygen at elevated temperature is conducted in the presence of a catalyst of long life to produce both of the titled compounds in high yield. CONSTITUTION:The gas phase oxidation of an unsaturated aldehyde such as acrolein or...

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Bibliographische Detailangaben
Hauptverfasser:	OODAN KIYOUJI, FUJINAGA MASATAKA, SUZUKI KENICHI, NUNOGAMI TOSHIHIKO, BANDOU YASUO
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:The gas-phase oxidation of acrolein or methacrolein with molecular oxygen at elevated temperature is conducted in the presence of a catalyst of long life to produce both of the titled compounds in high yield. CONSTITUTION:The gas phase oxidation of an unsaturated aldehyde such as acrolein or methacrolein is conducted with molecular oxygen at elevated temperature in the presence of a catalyst of the formula (X is potassium and/or cesium; a-i are atomic numbers where when a is 12, b is 0.3-5, c is 0.005-5, d is 0.05-5, e is 0.05-5, f is 0-5, g is 0.05-3, h is 0.005-5 and i is 37-89). The conversion of acrolein and the selectivity of methacrolein is increased. Especially, the catalyst containing potassium and/or cesium increases the yield of mathacrylic acid by leaps and bounds.