Aspects of selective oxidation and ammoxidation mechanisms over bismuth molybdate catalysts--2. Allyl alcohol as a probe for the allylic intermediate
Pulse reactor experiments were conducted on the reactions of unlabeled or deuterium- or oxygen-18-labeled allyl alcohols over molybdenum trioxide and various bismuth molybdates in the absence or presence of oxygen and ammonia. The allyl alcohol apparently adsorbed on oxidation sites to form acrolein via allyl molybdates, and on Broensted acid sites to form diallyl ether via an allyl carbonium ion. The bismuth enhanced ..cap alpha..-hydrogen abstraction, which was the rate-determining step in the oxidation. The product distributions provided evidence that the selective oxidation of propylene to acrolein proceeds via a m-allyl molybdate which collapses to an O o-allyl molybdate prior to the second hydrogen abstraction, and that the analogous N o-complex in ammoxidation undergoes two hydrogen abstractions to form acrylonitrile. Detailed reaction schemes are developed.
- Research Organization:
- Stand. Oil Co. (Ohio)
- OSTI ID:
- 6319918
- Journal Information:
- J. Catal.; (United States), Vol. 63:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Selective propylene oxidation and ammoxidation mechanism of bismuth molybdate catalysts
A DFT Investigation of the Mechanism of Propene Ammoxidation over α-Bismuth Molybdate
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALCOHOLS
OXIDATION
BISMUTH COMPOUNDS
CATALYTIC EFFECTS
MOLYBDATES
MOLYBDENUM OXIDES
ALLYL RADICALS
BROENSTED ACIDS
CHEMICAL REACTION KINETICS
EXPERIMENTAL DATA
PULSED REACTORS
REACTION INTERMEDIATES
TRACER TECHNIQUES
ALKYL RADICALS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ACIDS
ISOTOPE APPLICATIONS
KINETICS
MOLYBDENUM COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADICALS
REACTION KINETICS
REACTORS
REFRACTORY METAL COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)
400201 - Chemical & Physicochemical Properties