磷钨酸掺杂聚苯胺催化合成正己酸正丁酯及其动力学研究

doi:10.13218/j.cnki.csdc.2014.04.042

Abstract

Abstract: Synthesis of butyl hexanoate from hexanoic acid and n-butanol on H₃PW₁₂O₄₀/PANI was studied.Effects of reaction conditions,such as molar ratio of n-butanol to hexanoic acid,catalyst dosage and reaction time as well as the reusability of the catalyst were investigated.The kinetic data of this system were measured in a batch reactor.The optimum reaction conditions were obtained as:n(n-butanol)∶n(hexanoic acid)=4∶1;H₃PW₁₂O₄₀/PANI dosage,8% of the total mass of n-butanol and hexanoic acid;reaction time,5 h at temperature less than 126 ℃.The results showed that conversion of hexanoic acid can reach 98.88%;the conversion rate in the repeated operation remains above 98.46%;activity of the catalyst remains at 97.97% conversion after reuse of 4 times.The synthesis of butyl hexanoate is a second-order reaction on H₃PW₁₂O₄₀/PANI.The apparent activation energy is 21.87 kJ·mol^-1,and the pre-exponential factor is 1.636 L·mol^-1·min^-1.

Key words: butyl hexanoate, H₃PW₁₂O₄₀/PANI, synthesis, kinetics

CLC Number:

TQ655

LI Xiang, DING Bin, HAO Feng-ling, GUAN Chang, WANG Hai-dong, LIU Qun. Synthesis and kinetics of butyl hexanoate catalyzed by H₃PW₁₂O₄₀/PANI[J].China Surfactant Detergent & Cosmetics, 2014, 44(4): 186-189.

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Synthesis and kinetics of butyl hexanoate catalyzed by H₃PW₁₂O₄₀/PANI

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Synthesis and kinetics of butyl hexanoate catalyzed by H3PW12O40/PANI

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Synthesis and kinetics of butyl hexanoate catalyzed by H₃PW₁₂O₄₀/PANI