Synthesis and characterization of new VPO catalysts for partial n-butane oxidation to maleic anhydride

Journal Article · Fri Mar 01 04:00:00 EST 1991 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(91)90081-E· OSTI ID:5598575

Batis, N H; Batis, H ^[1]; Ghorbell, A; Vedrine, J C; Volta, J C ^[2]

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1. Faculte des Sciences, Tunis (Tunisia)
2. Institut de Recherches sur la Catalyse, Villeurbanne (France)

In order to try to control the V{sup 4+}/V{sup 5+} ratio of VPO catalysts for butane oxidation to maleic anhydride, a new method of preparation of these catalysts has been developed: it consists of the reaction of VC1{sub 3} (V{sup 3+}) with V{sub 2}O{sub 5} (V{sup 5+}) for the preparation of the precursor. Two series of catalysts have been prepared in aqueous and organic media. The V{sup 3+}/V{sup 5+} ratio has been varied and its influence on the physicochemical features and on the catalytic properties of the catalysts has been studied. The best catalysts in both preparation media correspond to V{sup 3+}/V{sup 5+} = 1 in the starting material. Catalysts have been characterized using X-ray diffraction, infrared spectroscopy, UV diffuse reflectance, Raman spectroscopy, {sup 31}P MAS NMR, and XPS techniques. The combination of all these techniques let the authors to conclude that the best catalyst consisted of an oxidized surface ({gamma}-VOPO{sub 4}) (V{sup 5+}) in interaction with reduced matrix ((VO){sub 2}P{sub 2}O{sub 7}) (V{sup 4+}).

• OSTI ID: 5598575
• Journal Information: Journal of Catalysis; (USA), Journal Name: Journal of Catalysis; (USA) Vol. 128:1; ISSN 0021-9517; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALKANES
ANHYDRIDES
AQUEOUS SOLUTIONS
BUTANE
CARBOXYLIC ACIDS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
DICARBOXYLIC ACIDS
DIFFRACTION
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELECTRON SPECTROSCOPY
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
INFRARED SPECTRA
ISOTOPES
LASER SPECTROSCOPY
LIGHT NUCLEI
MAGNETIC RESONANCE
MALEIC ACID
MIXTURES
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ODD-EVEN NUCLEI
OPTICAL PROPERTIES
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS 31
PHOSPHORUS COMPOUNDS
PHOSPHORUS ISOTOPES
PHOSPHORUS OXIDES
PHOTOELECTRON SPECTROSCOPY
PHYSICAL PROPERTIES
RADIATIONS
RAMAN SPECTROSCOPY
REFLECTIVITY
RESONANCE
SCATTERING
SOLUTIONS
SOLVENTS
SPECTRA
SPECTROSCOPY
STABLE ISOTOPES
SURFACE PROPERTIES
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
ULTRAVIOLET RADIATION
VANADIUM CHLORIDES
VANADIUM COMPOUNDS
VANADIUM OXIDES
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY