Catalytic oxidation of 1-butene and butadiene. Study of MoO/sub 3/-TiO/sub 2/ catalysts
Oxide catalysts containing 0-90Vertical Bar3< molybdena and titanium oxide were prepared by impregnation of anatase (I-series), coprecipitation of hydroxides (C-series), and decomposition of the tartarc acid complexes of the two metals (A-series). The oxidation of butene and butadiene to maleic anhydride followed the Mars-Van Krevelen mechanism. The selectivities for maleic anhydride on the C and I-series catalysts were highest at low (5-10Vertical Bar3<) molybdena contents, but conversions were low and the homogeneity and reproducibility of the catalysts were poor. For the A-series catalysts, best results were obtained with alumina-supported catalysts containing 15.6Vertical Bar3< atom Vertical Bar3< molybdenum, which gave 60Vertical Bar3< conversion of 1-butene with 53Vertical Bar3< selectivity for butadiene, furan, and maleic anhydride and a 40Vertical Bar3< yield of maleic anhydride, and had a 60Vertical Bar3< selectivity in the butadiene oxidation. The I-series catalysts, but not the other two series, deactivated with time on stream at 400/sup 0/C, apparently by a slow dehydration process. The activity of the I-series catalysts increased with halide treatment, but the effect of halide on A-series catalysts was insignificant.
- Research Organization:
- Univ. of Poitiers
- OSTI ID:
- 7101585
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 57:2; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKENES
BUTADIENE
BUTENES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
DATA
DIENES
ELEMENTS
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
KINETICS
METALS
MOLYBDENUM
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLYENES
QUANTITY RATIO
REACTION KINETICS
SYNTHESIS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
YIELDS