杂多酸盐催化合成柠檬酸三丁酯研究

doi:10.3969/j.issn.1673-5854.2016.04.005

Abstract

Abstract: Three kinds of heteropolyacid salts, i.e., 1-(3-sulfonic group) propyl-3-methyl imidazolium phosphomolybdate ([MIMPS]₃PMo₁₂O₄₀), 1-(3-sulfonic group) propyl-3-methyl imidazolium phosphotungstate ([MIMPS]₃PW₁₂O₄₀) and 1-(3-sulfonic group) propyl-3-methyl pyridine phosphotungstate ([PyPS]₃PW₁₂O₄₀), were synthesized.And the tributyl citrate (TBC) was synthesized with these three kinds of heteropolyacid salts as catalyst, in which [MIMPS]₃PMo₁₂O₄₀ performed the best catalytic property.The effects of various reaction conditions were investigated with [MIMPS]₃PMo₁₂O₄₀ as catalyst.The results showed that the esterification rate 98.3% was obtained under the optimum esterification conditions as follows: n(butanol):n(citric acid)=4.5:1.0, reaction temperature 130℃, reaction time 3.5h and the weight of catalyst 5%.The catalysis could be reused five times with the esterification rate still above 94%.

Key words: heteropolyacid salt, tributyl citrate, esterification, catalysis

CLC Number:

TQ35

JIANG Guang-ping, WANG Hong-bo, LUO Feng. Synthesis of Tributyl Citrate Catalyzed by Heteropolyacid Salt[J]. bce, 2016, 50(4): 26-30.

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Synthesis of Tributyl Citrate Catalyzed by Heteropolyacid Salt

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