Kinetic analysis of 1-butene oxidation to maleic anhydride (MA) with a polyfunctional catalyst
Kinetic analysis of 1-butene oxidation to maleic anhydride (MA) with a polyfunctional catalyst, a phosphorus/vanadium oxide (PVO) with P/V ratios of 1.3:1 or 1.4:1, carried out in a pulse microreactor or a continuous-flow integral microreactor, suggested the presence of two different types of active sites on the catalyst surface responsible for 1-butene oxidation to butadiene (the main intermediate) and oxidation of the latter to MA. Carbon oxides are formed at both types of active sites. Butadiene is probably formed via a redox mechanism involving lattice oxygen, whereas the second stage, which is considerably more selective, involves adsorbed oxygen species. The selectivity of the first stage was improved by adding a bismuth molybdate (2:1 Bi/Mo) at 1:2 by wt to the PVO. This modification also increased considerably the over-all reaction rate and MA yield, which approached that obtained in oxidation of pure butadiene.
- Research Organization:
- Inst. Technol. Chim. Spec. Bologna
- OSTI ID:
- 6199787
- Journal Information:
- Ind. Eng. Chem., Prod. Res. Dev.; (United States), Vol. 18:4
- Country of Publication:
- United States
- Language:
- English
Similar Records
Oxidation of butene to maleic anhydride--1. Kinetics and mechanism
Vanadium-phosphorus-oxygen industrial catalysts for C/sub 4/ hydrocarbon selective oxidation to maleic anhydride
Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ANHYDRIDES
CHEMICAL REACTION YIELD
BUTADIENE
OXIDATION
BUTENES
CATALYSTS
SURFACE PROPERTIES
PHOSPHORUS
CATALYTIC EFFECTS
VANADIUM OXIDES
ADDITIVES
BISMUTH
CHEMICAL REACTION KINETICS
CHEMICAL REACTORS
MOLYBDATES
OXYGEN
PULSE TECHNIQUES
QUANTITY RATIO
REACTION INTERMEDIATES
SPECIFICITY
ALKENES
CHALCOGENIDES
CHEMICAL REACTIONS
DIENES
ELEMENTS
HYDROCARBONS
KINETICS
METALS
MOLYBDENUM COMPOUNDS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLYENES
REACTION KINETICS
REFRACTORY METAL COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
VANADIUM COMPOUNDS
YIELDS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)
400201 - Chemical & Physicochemical Properties