Verfahren zur Herstellung von Oxydationskatalysatoren

Acrylonitrile is prepared from ammonia, propylene and oxygen in a fixed bed reactor containing a Mo, Bi and Si catalyst, the latter having been prepared by forming a homogeneous solution of ammonium molybdate, a bismuth salt, silicic acid sel and a mineral acid, preferably nitric acid, in the absenc...

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1. Verfasser:	KOENIG,HEINZ,DR
Format:	Patent
Sprache:	ger
Schlagworte:	CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Acrylonitrile is prepared from ammonia, propylene and oxygen in a fixed bed reactor containing a Mo, Bi and Si catalyst, the latter having been prepared by forming a homogeneous solution of ammonium molybdate, a bismuth salt, silicic acid sel and a mineral acid, preferably nitric acid, in the absence of phosphonic acid and/or phosphates, and if desired in the presence of one or more compounds of Be, Ca, Sn, Ba, Zn, Cd, Li, Na and/or Ag and drying and calcining the homogeneous acid solution by spraying it on to a hot solid medium of aluminium alicate, corundum, quartz, magnesium aluminate, feldspar and granite. Examples are given. Specification 967,877 is referred to.ALSO:An oxidation catalyst containing Mo, Bi and Si is prepared by forming a homogeneous acid solution of ammonium molybdate, a bismuth salt, silicic acid sol and a mineral acid, preferably HNO3, in the absence of phosphoric acid and/or phosphates but in the presence of, if desired, one or more compounds of Be, Ca, Sr, Ba, Zn, Cd, Li, Na and/or Ag and drying and calcining the homogeneous acid solution by spraying it on to a hot solid medium, e.g. aluminium silicate, corundum, quartz, magnesium aluminate, feldspar and granite. Examples are given. Specification 967,877 is referred to.