Solvothermal synthesis of micro-cuboid MoV2O8 for vapor-phase ammoxidation of p-chlorotoluene

Tang, Wanjun; Liu, Yunyi; Ding, Shuang; Zhao, Dongmei; Li, Tingcheng; Xie, Guangyong

doi:10.1007/s11164-022-04801-x

Cited by 8 publications

(3 citation statements)

References 39 publications

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“…Cr, Ti, Mo or P) on carriers (e.g. silica or alumina) or as bulk systems [5][6][7][8][9][10][11][12][13][14][15]. V-Cr-O based composite oxides are known to be highly e cient for selective gas-phase ammoxidation of various chloro-substituted toluenes.…”

Section: Introductionmentioning

confidence: 99%

Effect of metal oxide contents on the structure and performance of spray dried CrVO4/SiO2 catalysts for the ammoxidation of chlorotoluenes

Tong,

Huang,

Tang

et al. 2024

Preprint

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This work aims at developing a customized ammoxidation catalyst through optimizing the metal oxide content in CrVO4/SiO2 catalysts. Various amounts of Cr-V-O with 1:1 molar ratio of Cr/V were successfully loaded on SiO2 via spray drying method with colloidal silica as the binder. Polarized light microscope (PLM) illustrated that the CrVO4/SiO2 particles presented as well dispersed microspheres in the micro size (20-80 μm). X-ray diffraction spectroscopy (XRD) confirmed the formation of monoclinic CrVO4 phase wherein the metal oxide content was ranged from 30 to 70 weight percent. FT-IR spectra indicated that the introduction of metal oxide had no obvious effects on the skeletal structure of SiO2. X-ray photoelectron spectroscopy (XPS) analysis revealed that the valence state of V and Cr was hardly affected with increasing the metal oxide content. Performances of the obtained CrVO4/SiO2 catalysts with different metal oxide contents were investigated via the ammoxidation of a model compound namely; para-chlorotoluene. As a result of catalytic test, the CrVO4/SiO2 catalyst with 60% metal oxide content exhibited the best catalytic performance. In addition, this catalyst was an efficient and selective catalyst toward ammoxidation reactions of toluene, ortho- and meta-chlorotoluenes.

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Section: Introductionmentioning

confidence: 99%

Effect of metal oxide contents on the structure and performance of spray dried CrVO4/SiO2 catalysts for the ammoxidation of chlorotoluenes

Tong,

Huang,

Tang

et al. 2024

Preprint

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“…Aromatic nitriles, including chlorobenzonitriles, are very useful commodities and ne chemicals [1][2][3]. To avoid some toxic chemicals involved the production of aromatic nitriles on an industrial scale, catalytic ammoxidation of methyl aromatics and heteroaromatics has been explored as a preferred route [4][5][6][7][8][9][10][11][12]. Different types of catalysts have been developed during the last years.…”

Section: Introductionmentioning

confidence: 99%

“…Different types of catalysts have been developed during the last years. Vanadium-based oxides are preferentially used as bulk or supported catalysts for ammoxidation reactions [6][7][8][9][10][11][12][13][14]. Among them, VPO composite oxide catalysts have attracted much attention due to their excellent catalytic performances in the reaction of C4 ole ns to produce maleic anhydride [15,16] and the partial oxidation of propane to produce acrylic acid [17,18].…”

Section: Introductionmentioning

confidence: 99%

Catalytic performances of VPO/SBA-15 catalysts for ammoxidation of dichlorotoluenes

Zhao,

Tang,

You

et al. 2023

Res Chem Intermed

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Vanadium phosphorus oxide (VPO) was immobilized on SBA-15 via a facile impregnation process. The structure and VPO species on SBA-15 were characterized by XRD, TEM, BET, FTIR and XPS techniques. It was found the VPO/SBA-15 catalysts maintained the two-dimensional hexagonal structure of SBA-15, and the supported VPO species existed in a highly dispersed amorphous state. VPO/SBA-15 catalyst was tested for the ammoxidation of dichlorotoluenes (DCT) to corresponding dichlorobenzonitriles (DCN) in a lab-scale tube reactor. Compared with VPO/SiO 2 (large-pore silica-supported VPO), VPO/SBA-15 exhibited appreciable enhancement in the catalytic performance due to the unique channel structure of SBA-15.The yield and selectivity toward 2,4-DCN increased by 7% and 6%, while toward the sterically hindered 2,6-DCN increased by 7% and 13%, respectively.

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Hydrothermal Synthesis of Monoclinic CrVO4 Nanoparticles and Catalytic Ammoxidation of 2-chlorotoluene

Liu¹,

Zhao²,

Tang³

et al. 2023

Catal Lett

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Solvothermal synthesis of micro-cuboid MoV2O8 for vapor-phase ammoxidation of p-chlorotoluene

Cited by 8 publications

References 39 publications

Effect of metal oxide contents on the structure and performance of spray dried CrVO4/SiO2 catalysts for the ammoxidation of chlorotoluenes

Effect of metal oxide contents on the structure and performance of spray dried CrVO4/SiO2 catalysts for the ammoxidation of chlorotoluenes

Catalytic performances of VPO/SBA-15 catalysts for ammoxidation of dichlorotoluenes

Hydrothermal Synthesis of Monoclinic CrVO4 Nanoparticles and Catalytic Ammoxidation of 2-chlorotoluene

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