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In this work, a green and novel route to dimethyl succinate (DMS) was established, which was by direct esterification of bio-based disodium succinate using CO2 and CH3OH without using strong inorganic acids. DMS is an ideal polymer precursor to synthesize poly (butylene succinate), its large production with low cost and environment benignity could relieve the dramatically demand for biodegradable plastics. Moreover, CO2 adoption instead of inorganic acids in the reaction would be in accord with green and sustainable development concept. (See Yu-Gao Wang et al., Pages 188–195)
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In order to deeply investigate the influence mechanism of support on the dual active components (VOx/MoOx) in the selective oxidation of aromatics, supported vanadia-molybdena based catalysts had been prepared by using TiO2, MgO, ZSM-5, NaY and Mordenite as supports. VOx/MoOx supported on TiO2 shows strong interactions between active components and support, which exhibits excellent catalytic performance in the selective oxidation of 2-methylnaphthalene to 2-naphthaldehyde. In addition, V and Mo atoms can be inserted into TiO2 lattice to enhance the activity of surface oxygen species. (See Yi Yu, et al., Pages 106–116)
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The coupling process was widely used in the separation of waste liquid. Aiming at the problem that it was difficult to separate the complex mixture of methanol/acetone/water produced in the production process of polymethyl methacrylate, the distillation coupled pervaporation membrane technology was proposed to achieve efficient separation and energy-saving for the first time. Through the analysis of thermodynamic phase behavior and pressure sensitivity, the optimal schemes of separating mixtures with different compositions by pressure-swing distillation were designed. Thus, the energy-saving advantages of the coupling process in treating complex mixtures were revealed through the analysis of economy and energy consumption (See Hongru Zhang et al., Pages 12–20).
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Oxidative desulfurization (ODS) is considered to be one of the most promising technologies to realize ultra-deep desulfurization of oil. A PEHA-HPW heterogeneous catalyst for ODS was prepared by combining pentamethylene hexamine (PEHA) and phosphotungstic acid (HPW) in a simple one-step process. There is a synergistic catalytic effect between the abundant amino groups on the surface and the catalytic sites of HPW, which makes PEHA-HPW show excellent catalytic ODS activity, and quickly achieve the complete removal of dibenzothiophene to produce clean oil (See Chongfu Wu et al., Pages 140–147).
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2023年 第64卷 第12期 刊出日期:2023-12-28
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