Mechanism of phthalic anhydride formation in the oxidation of n-pentane on a vanadium-phosphorus oxide catalyst

Zazhigalov, V. A.; Cheburakova, E. V.; Gansior, M.; Stoch, J.

doi:10.1134/s0023158406060012

Cited by 9 publications

(3 citation statements)

References 27 publications

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“…Pentane has been similarly transformed to phthalic anhydride in addition to MA (91)(92)(93)(94)(95)(96)(97). Pentane has been similarly transformed to phthalic anhydride in addition to MA (91)(92)(93)(94)(95)(96)(97).…”

Section: Selective Oxidationmentioning

confidence: 99%

Vanadium Phosphate Materials as Selective Oxidation Catalysts

Dummer

Bartley

2011

Advances in Catalysis

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Section: Selective Oxidationmentioning

confidence: 99%

Vanadium Phosphate Materials as Selective Oxidation Catalysts

Dummer

Bartley

2011

Advances in Catalysis

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“…[6][7][8][9][10][11][12][13][14] The catalytic performance of both VO(PO 3 ) 2 and (VO) 2 P 2 O 7 catalysts have been evaluated in gas-phase reactions such as oxidations, oxidative dehydrogenations, and ammoxidations. [15][16][17][18][19][20][21][22][23] However, VO(PO 3 ) 2 showed poor catalytic performance in gas-phase oxidation of n-butane to maleic anhydride when compared to the high catalytic activity of (VO) 2 P 2 O 7 . The poor catalytic performance of VO(PO 3 ) 2 in n-butane oxidation, due to low activity and selectivity, has limited its application in other chemical reactions.…”

Section: Introductionmentioning

confidence: 99%

Structural Characteristics, Stability, and Activity of (VO)₂P₂O₇ and VO(PO₃)₂ Catalysts in p‐Cymene Liquid‐Phase Oxidation

Makgwane¹,

Ferg²,

Zeelie³

2010

ChemCatChem

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The post‐reaction structural characteristics of VO(PO3)2 and (VO)2P2O7 catalysts and their reusability in liquid‐phase oxidation of p‐cymene to tertiary cymene hydroperoxide (TCHP) are investigated and characterized. The VO(PO3)2 structure remains unchanged after being used for extended reaction times, whereas (VO)2P2O7 undergoes structural changes back to its precursor phase, VOHPO4⋅0.5 H2O, that affect its catalytic properties. The structure of the (VO)2P2O7 that has undergone phase changes is successfully restored by calcination under N2 flow at 750 °C for 2 h. Fresh and used catalysts show different particle morphologies, indicating that the reaction medium influences the microstructure. Both catalysts show considerable reusability with (VO)2P2O7 showing slight gradual deactivation. Taking into account the characterization and catalytic results obtained, the slight (VO)2P2O7 deactivation can probably be ascribed to the adsorption of organic compounds on the catalyst surface, which appears to initiate structural transformation of the (VO)2P2O7 catalyst under oxidation reaction conditions for extended reaction times. The VO(PO3)2 and (VO)2P2O7 catalysts showed to be effective for synthesis of the industrially important intermediate TCHP, a precursor to p‐cresol in liquid‐phase oxidation reactions.

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“…Cheburakava, E. et al (2007) [19] presented the effect of metal doped on VPO catalyst with acid sites. The PA selectivity can be achieved by increase the number of Lewis acidity but that also decrease the selectivity of MA.…”

Section: Goh C Et Al (2008)mentioning

confidence: 99%

Effect of transition metals promoted on Vanadium phosphorus oxide (VPO) catalysts in the partial oxidation of n-pentane

Pisuttangkul

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Vanadium phosphorus oxide (VPO) catalysts have been employed in partial oxidation of n-butane and n-pentane. In this study, VPO catalysts were synthesized by refluxing vanadyl phosphate dihydrate (VOPO4•2H2O) with isobutanol and modified with transition metals promoters such as Co, Bi, Fe, and Mn at the mass ratio of M/V 0.35. In the first part, Mn was found to be the best metal to improve the performances of VPO catalyst in n-pentane oxidation. Then the Mn-VPO catalysts were prepared with different ratios of Mn/V loadings at 0.25, 0.35, 0.45, 0.55, and 0.65. All the catalysts were calcined at 300ᵒC for 8 h to generate the vanadyl pyrophosphate ((VO)2P2O7) phase which is the active phase of VPO catalysts and was confirmed by the XRD results. As shown by SEM results, all the synthesized catalysts showed the rosette-shape morphologies of vanadyl pyrophosphate. The transition metal promoted catalysts presented the formation of V4+ state which provided a better catalytic performance with 42.7-55.8% n-pentane conversion, 28.9-62.5% MA selectivity, and 8-13.1% PA selectivity. The optimum ratio of Mn/V was determined to be at 0.45

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Mechanism of phthalic anhydride formation in the oxidation of n-pentane on a vanadium-phosphorus oxide catalyst

Cited by 9 publications

References 27 publications

Vanadium Phosphate Materials as Selective Oxidation Catalysts

Vanadium Phosphate Materials as Selective Oxidation Catalysts

Structural Characteristics, Stability, and Activity of (VO)₂P₂O₇ and VO(PO₃)₂ Catalysts in p‐Cymene Liquid‐Phase Oxidation

Effect of transition metals promoted on Vanadium phosphorus oxide (VPO) catalysts in the partial oxidation of n-pentane

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Mechanism of phthalic anhydride formation in the oxidation of n-pentane on a vanadium-phosphorus oxide catalyst

Cited by 9 publications

References 27 publications

Vanadium Phosphate Materials as Selective Oxidation Catalysts

Vanadium Phosphate Materials as Selective Oxidation Catalysts

Structural Characteristics, Stability, and Activity of (VO)2P2O7 and VO(PO3)2 Catalysts in p‐Cymene Liquid‐Phase Oxidation

Effect of transition metals promoted on Vanadium phosphorus oxide (VPO) catalysts in the partial oxidation of n-pentane

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Structural Characteristics, Stability, and Activity of (VO)₂P₂O₇ and VO(PO₃)₂ Catalysts in p‐Cymene Liquid‐Phase Oxidation