Use of Microwave Irradiation to Synthesize Solketal from Glycerol and Acetone

IF 0.7 Q4 ENGINEERING, CHEMICAL

Catalysis in Industry Pub Date : 2024-05-27 DOI:10.1134/S2070050424700053

V. A. Bolotov, A. E. Kibilyuk, V. N. Parmon, V. N. Panchenko, M. N. Timofeeva

引用次数: 0

Abstract

It has been shown that solketal can be synthesized from glycerol and acetone irradiation in the presence of montmorillonite (MM) modified with an aqueous solution of 0.25 mol/L of HCl (0.25M HCl/MM). The reaction has been studied in a methanol solution at an acetone/glycerol molar ratio of 2.45–7.53, a catalyst concentration of 1.2–2.8 wt % (based on glycerol weight), and 30–56°C. It has been shown that solketal is the major product with a selectivity of 96.1–99.2%. The maximum solketal yield of 91.3% with a 98.6% selectivity is obtained within 15 min of reaction at an acetone/glycerol molar ratio of 7.53, a catalyst loading of 2.3 wt % (based on glycerol weight), and 56°C. The catalytic properties of 0.25M HCl/MM in the reaction under microwave and thermal heating conditions have been compared. It has been shown that the solketal yield in the reaction under MW irradiation is 2 times higher than that in the process with thermal heating.

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利用微波辐照从甘油和丙酮合成 Solketal

摘要研究表明，在用 0.25 摩尔/升盐酸水溶液（0.25M HCl/MM）修饰过的蒙脱石（MM）存在下，可以用甘油和丙酮辐照合成索酮醛。在丙酮/甘油摩尔比为 2.45-7.53、催化剂浓度为 1.2-2.8 wt %（基于甘油重量）、温度为 30-56°C 的甲醇溶液中对该反应进行了研究。结果表明，溶酮醛是主要产物，选择性为 96.1-99.2%。在丙酮/甘油摩尔比为 7.53、催化剂负载量为 2.3 wt %（以甘油重量为基准）、温度为 56°C 的条件下，反应 15 分钟内可获得 91.3% 的最高溶酮醛产率和 98.6% 的选择性。比较了 0.25M HCl/MM 在微波和热加热条件下反应的催化特性。结果表明，在微波辐照下反应的溶酮产量是热加热工艺的 2 倍。

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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.