用酸活化蒙脱土控制其催化甘油丙酮合成索酮的行为

IF 0.7 Q4 ENGINEERING, CHEMICAL

Catalysis in Industry Pub Date : 2022-06-22 DOI:10.1134/S2070050422020040

O. N. Kovalenko, I. I. Simentsova, V. N. Panchenko, M. N. Timofeeva

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引用次数: 0

摘要

研究了0.125 ~ 0.5 M Н2SO4、HCl和HNO3对含95%蒙脱土(MM)天然粘土(Mukhartalinskii沉积物)的酸活化对其物理化学性质和催化性能的影响，以甘油和丙酮为原料合成溶胶[(2,2-二甲基1,3-二氧基)甲醇]。对索酮的反应速率和选择性取决于酸的种类和浓度。溶胶的产率和反应速率均随酸浓度的增加而增加，这与Brønsted酸位数目的增加有关。系统的效率按MM/HCl >毫米/硝酸比;MM/H2SO4随表面酸度降低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Acid Activation of Montmorillonite as a Way of Controlling Its Catalytic Behavior in the Synthesis of Solketal from Glycerol and Acetone

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Acid Activation of Montmorillonite as a Way of Controlling Its Catalytic Behavior in the Synthesis of Solketal from Glycerol and Acetone

The effect of acid activation with 0.125–0.5 M Н₂SO₄, HCl, and HNO₃ on the physicochemical properties and catalytic performance of natural clay (the Mukhartalinskii deposit) containing 95% montmorillonite (MM) was investigated in the synthesis of solketal [(2,2-dimethyl 1,3-dioxolan-4-yl)methanol] from glycerol and acetone. The reaction rate and selectivity toward solketal are shown to depend on the type and concentration of acid. Both the yield of solketal and the reaction rate rose with increasing acid concentration, which correlates with the increase in the number of Brønsted acid sites. The efficiency of the system was found to diminish in the order MM/HCl > MM/HNO₃ > MM/H₂SO₄ as the surface acidity decreased.

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来源期刊

Catalysis in Industry ENGINEERING, CHEMICAL-

CiteScore

1.30

自引率

14.30%

发文量

期刊介绍： The journal covers the following topical areas: Analysis of specific industrial catalytic processes: Production and use of catalysts in branches of industry: chemical, petrochemical, oil-refining, pharmaceutical, organic synthesis, fuel-energetic industries, environment protection, biocatalysis; technology of industrial catalytic processes (generalization of practical experience, improvements, and modernization); technology of catalysts production, raw materials and equipment; control of catalysts quality; starting, reduction, passivation, discharge, storage of catalysts; catalytic reactors.Theoretical foundations of industrial catalysis and technologies: Research, studies, and concepts : search for and development of new catalysts and new types of supports, formation of active components, and mechanochemistry in catalysis; comprehensive studies of work-out catalysts and analysis of deactivation mechanisms; studies of the catalytic process at different scale levels (laboratory, pilot plant, industrial); kinetics of industrial and newly developed catalytic processes and development of kinetic models; nonlinear dynamics and nonlinear phenomena in catalysis: multiplicity of stationary states, stepwise changes in regimes, etc. Advances in catalysis: Catalysis and gas chemistry; catalysis and new energy technologies; biocatalysis; nanocatalysis; catalysis and new construction materials.History of the development of industrial catalysis.