Synthesis of vanadium phosphorus oxide catalysts by aerosol processing

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie00045a008· OSTI ID:178372

Michalakos, P M; Kung, H H ^[1]; Bellis, H E ^[2]; Brusky, P ^[3]; Li, H Q; Moser, W R ^[4]; Partenheimer, W; Satek, L C ^[5]

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1. Northwestern Univ., Evanston, IL (United States)
2. E.I. duPont de Nemours and Co., Deepwater, NJ (United States). Chemicals and Pigments Dept.
3. Battelle Columbus Div., OH (United States)
4. Worcester Polytechnic Inst., MA (United States). Dept. of Chemical Engineering
5. Amoco Chemical Co., Naperville, IL (United States)

The use of an aerosol process to prepare vanadium phosphorus oxide (VPO) catalysts for butane oxidation to maleic anhydride was investigated. Heating an aerosol created with air of an aqueous solution of NH{sub 4}VO{sub 3} and H{sub 3}PO{sub 4} with phosphorus to vanadium atomic ratio P/V = 1.2 at 700 C resulted in a material that had an average vanadium oxidation state of 4.7--5.0. After activation in a butane and oxygen mixture, a stable catalyst was obtained which showed selectivities to maleic anhydride (MA) of up to 48% at 475 C. X-ray diffraction and laser Raman spectroscopic characterization of the catalyst showed that the as-prepared sample was mostly VOPO{sub 4} {center_dot} 2H{sub 2}O, which was converted to {alpha}{sub I}-VOPO{sub 4} under reaction conditions. The catalyst was much more active than a VPO catalyst with P/V = 1.1 or 1.2 prepared by the conventional method in an aqueous medium. Thus, in spite of its lower surface area and selectivity for MA, it produced a higher yield of MA even on the basis of the weight of catalyst.

• Sponsoring Organization: USDOE
• OSTI ID: 178372
• Journal Information: Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 6 Vol. 34; ISSN IECRED; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
40 CHEMISTRY
BUTANE
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL ACTIVATION
CHEMICAL PREPARATION
OXIDATION
SURFACE AREA
VALENCE
VANADIUM PHOSPHATES