Author:
Li Mengmeng,Li Xinyi,Zhang Hui
Abstract
A solid acid was prepared by the reaction of phosphotungstic acid (HPW)with 1-methy- limidazolium sulfobutyrolactone (MIMSB) and characterized by the methods of X-ray powder diffraction, FT-IR, potentiometric titration and SEM. Then the solid acid was employed for esterification to evaluate its acid-catalytic activity. Various reaction parameters, including catalyst dosage, reaction time, n-butanel/butyric acid molar ratio and reaction temperature were systematically examined. These results indicated that the prepared catalyst maintained the Keggin structure of the raw HPW, and had high acidity. The catalyst exhibited excellent catalytic activity in esterification of n-butyric acid and n-butanol.93. 4% conversion of n-butyric acid was obtained under the optimized reaction conditions. The catalyst also had good stability.
Publisher
Cambridge International Publishing
Reference11 articles.
1. Li Chengyuan, Liu Yuanyuan, Zheng Huayan, et al. Progress in the molecular structure and catalytic organic synthesis of heteropolyacid (salt) [J] chemical progress, 2010, 29(2):243-249.
2. Wang Desheng, Yan Liang, and Wang Xiaolai. Progress in heteroacid catalysts [J] Molecular catalysis, 2012, 26(4) :366-374.
3. Liu Li wang B,Du Y,et al .Supported H4Siw12O40/Al2O3 solid acid catalysts for dehydration of glycerol to acrolein: Evolution of catalyst structure and performance with calcination temp erature[J] .Appl catal A:Gen,2015,489:32-41.
4. Pasquale G,Vizquez P,Romanelli G,et al.catalytic upgrading of levulinic acid to ethyl levulinate using reusable silica-included wellsDawson heteropoly acid as catalyst[J]. catal commun,2012,18:115-120.
5. Pesaresi L,Brown DR,Lee A F,et al .cs -doped H4SiW12O40 catalysts for biodiesel applications [J] .Appl catal A :Gen,2009,360:50-58.