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Author(s): |
Shui-jin Yang, College of Chemistry and Environmental Engineering, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Hubei Normal University, Huangshi, China
Guo-jun Yin, College of Chemistry and Environmental Engineering, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Hubei Normal University, Huangshi, China
Yi-jun Zhang, College of Chemistry and Environmental Engineering, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Hubei Normal University, Huangshi, China
De-yan Han, College of Chemistry and Environmental Engineering, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Hubei Normal University, Huangshi, China
Yan-jun Hu, College of Chemistry and Environmental Engineering, Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, Hubei Normal University, Huangshi, China |
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Abstract: |
A new environmental friendly catalyst, H4SiW12O40/MCM-48 was prepared. Catalytic activities of H4SiW12O40/MCM-48 in synthesizing 2-methyl-2-ethoxycarbonylmethyl-1,3-dioxolane, 2,4-dimethyl-2- ethoxycarbonylmethyl-1,3-dioxolane, cyclohexanone ethylene ketal, cyclohexanone 1,2-propanediol ketal, butanone ethylene ketal, butanone 1,2-propanediol ketal, 2-phenyl-1,3-dioxolane, 4-methyl-2-phenyl-1, 3-dioxolane, 2-propyl-1,3-dioxolane, 4-methyl-2-propyl-1,3-dioxolane were reported. It has been demonstrated that H4SiW12O40/MCM-48 is an excellent catalyst. Various factors concerned in these reactions have been investigated. The optimum conditions have been found, that is, the molar ratio of aldehyde / ketone to glycol is 1/1.6, the mass ratio of the catalyst used to the reactants is 0.6%, and the reaction time is 45 min. Under these conditions, the yield of 2-methyl-2-ethoxycarbonylmethyl-1,3-dioxolane is 78.2%, and 2,4-dimethyl-2-ethoxycarbonylmethyl-1,3-dioxolane is 86.7%, the yield of cyclohexanone ethylene ketal is 83.1%, and cyclohexanone 1,2-propanediol ketal is 87.2%, the yield of butanone ethylene ketal is 52.2%, and butanone 1,2-propanediol ketal is 91.9%, the yield of 2-phenyl-1,3-dioxolane is 83.7%, and 4-methyl-2-phenyl-1,3-dioxolane is 82.9%, the yield of 2-propyl-1,3-dioxolane is 87.5%, and 4-methyl-2-propyl-1,3-dioxolane is 86.2%.
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