Oxidation of O-xylene on potassium vanadates
Journal Article
·
· J. Catal.; (United States)
Nine catalysts, prepared by either solid-state reaction or a ''wet'' method, were characterized by X-ray diffraction and tested for the oxidation of o-xylene at 320/sup 0/-450/sup 0/C. The catalysts had various K/sub 2/O/V/sub 2/O/sub 5/ ratios and one was supported on TiO/sub 2/. A mixture of pure V/sub 6/O/sub 13/ and TiO/sub 2/ was also studied. In the reaction medium, the catalysts reduced to form V/sub 6/O/sub 13/ and sphase. The reduced catalysts contained approx. 5-24Vertical Bar3< vanadium(IV). The degree of reduction was lower in the catalysts prepared by the wet method. The main product of o-xylene oxidation was phthalic anhydride except from the two catalysts with the highest potassium content, which yielded tolualdehyde as the main product. Smaller amounts of phthalide and maleic anhydride were also produced. A correlation between activities, selectivities, and catalyst compositions suggested that V/sub 6/O/sub 13/ is the active component and that the presence of sphase inhibits its oxidation to V/sub 2/O/sub 5/, which occurred in the absence of sphase.
- Research Organization:
- Res. Lab. Catal. Surface Chem., Acad. Sci. Pol.
- OSTI ID:
- 6682863
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 58:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Journal Article
·
Sat Nov 30 23:00:00 EST 1996
· Journal of Catalysis
·
OSTI ID:468679
Oxidation of o-xylene to phthalic anhydride over V{sub 2}O{sub 5}/TiO{sub 2} catalysts. III. Study of organic residue formed on the catalyst surface
Journal Article
·
Sun Sep 01 00:00:00 EDT 1996
· Journal of Catalysis
·
OSTI ID:494280
Comparison of V/sub 2/O/sub 5//TiO (ANATASE) and V/sub 2/O/sub 5//TiO/sub 2/ (rutile): Promoting effect of the support
Conference
·
Fri Feb 28 23:00:00 EST 1986
· Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)
·
OSTI ID:5400044
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALI METAL COMPOUNDS
ALKYLATED AROMATICS
AROMATICS
CATALYSTS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CORRELATIONS
DATA
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
POTASSIUM COMPOUNDS
QUANTITY RATIO
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TESTING
XYLENES
YIELDS
400201* -- Chemical & Physicochemical Properties
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALI METAL COMPOUNDS
ALKYLATED AROMATICS
AROMATICS
CATALYSTS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CORRELATIONS
DATA
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
POTASSIUM COMPOUNDS
QUANTITY RATIO
STRUCTURAL CHEMICAL ANALYSIS
SYNTHESIS
TESTING
XYLENES
YIELDS