无机-有机双修饰的杂多酸催化剂上苯与双氧水羟基化制苯酚（英文）

Various catalysts, including the heteropolyacid(HPA) H4PMo11VO40, its cesium salts, and inorganic–organic dual modified HPA catalyst, were prepared and characterized by Fourier transform infrared spectroscopy(FT-IR), nuclear magnetic resonance(13C NMR), N2 adsorption, acid–base titration, electron s...

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Published in:中国化学工程学报：英文版 2014 (Z1), p.1220-1225
Main Author: 景丽 张富民 钟依均 朱伟东
Format: Article
Language:English
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Heteropolyacids
Hydrophobic
Hydroxylation
interaction
Liquid-phase
oxidation
Phenols
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description Various catalysts, including the heteropolyacid(HPA) H4PMo11VO40, its cesium salts, and inorganic–organic dual modified HPA catalyst, were prepared and characterized by Fourier transform infrared spectroscopy(FT-IR), nuclear magnetic resonance(13C NMR), N2 adsorption, acid–base titration, electron spin resonance(ESR) and X-ray diffraction(XRD) techniques as well as elemental analysis. These prepared catalysts were used in the hydroxylation of benzene to phenol by H2O2 as oxidant. The inorganic–organic dual modified HPA Cs2.5(MIMPS)1.5PMo11VO40, prepared by partially exchanging Cs+with protons in H4PMo11VO40 and followed by the immobilization of 3-(1-methylimidazolium-3-yl)propane-1-sulfonate(MIMPS), led to a liquid–solid biphasic catalysis system in the hydroxylation, which showed the best catalytic performance in terms of reusability and catalytic activity. The high reusability of Cs2.5(MIMPS)1.5PMo11VO40 in the heterogeneous hydroxylation was probably due to its high resistance in leaching of bulk HPA into the reaction medium. The slightly enhanced catalytic activity for the catalyst was due to the acid sites available from MIMPS beneficial to the hydroxylation.
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subjects Heteropolyacids
Hydrophobic
Hydroxylation
interaction
Liquid-phase
oxidation
Phenols
title 无机-有机双修饰的杂多酸催化剂上苯与双氧水羟基化制苯酚（英文）
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