Molybdenum-based catalyst for gas phase olefin oxidn. - to carbonyl cpds., having high selectivity

Novel catalyst for the prepn. of unsatd. carbonyl cpds. by the gas phase oxidn. of olefins, contains Mo in the oxide form and opt. other Gp. 6B elements, together with >=1 element of Gp. 4A, 5A and 8B. The atomic ratio of the elements present is Mo 12; opt. Cr + W + U =6; Gp. 4A elements, i.e. Si...

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Hauptverfasser:	NOVAK,VLASTIMIL, JELINEK,JAROMIR,DR, SOKOL,LUDVIK
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Novel catalyst for the prepn. of unsatd. carbonyl cpds. by the gas phase oxidn. of olefins, contains Mo in the oxide form and opt. other Gp. 6B elements, together with >=1 element of Gp. 4A, 5A and 8B. The atomic ratio of the elements present is Mo 12; opt. Cr + W + U =6; Gp. 4A elements, i.e. Si, Ge, Sn, Pb 0.5-10; Gp. 5A elements i.e. P, As, Sb, Bi 0.1-10; Gp. 8B elements i.e. Fe, Co, Ni 0.1-10. There is also present a Mg cpd. or a cellulose deriv., or hexamethylene tetramine in a mol. ratio to Mo of 0.0005-2:12. The catalyst has high activity, improved mechanical props., porosity and low bulk density compared with known catalysts. It is partic. suitable for the selective oxidn. of propylene to acrolein and acrylic acid.