丙酸甲酯水解反应动力学研究
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摘要
为了给工业中水解丙酸甲酯提供动力学支持,文中研究了以NKC-9型阳离子交换树脂为催化剂水解丙酸甲酯的动力学过程。在消除内外扩散的影响下,考察了转速、催化剂用量、反应温度以及水酯摩尔比等因素对丙酸甲酯转化率的影响,得出较优实验条件为转速400 r/min、催化剂用量为溶液总质量的7%,反应温度为343.15 K,水酯摩尔比5∶1。通过对328.15—343.15 K下的实验数据进行拟合,得到丙酸甲酯水解的动力学方程。通过实验与计算值的比较验证,此反应动力学方程合理,可用于模拟计算。
To provide the support of kinetics for hydrolyzing methyl propionate in the industry,the reaction kinetics of methyl propionate hydrolyzed in the presence of NKC-9 cationic-exchange resin catalyst was studied. Without internal and external diffusion,the influences of speed,the amount of catalyst,reaction temperature and mole ratio of the water ester on the conversion of methyl propionate were investigated. The optimal reaction conditions were as follows: speed 400 r/min,catalyst dosage 7%( mass fraction),temperature 343. 15 K,water ester mole ratio 5∶ 1.The kinetics parameters of methyl propionate hydrolysis were measured by fitting the experimental data at 328. 15-343. 15 K. By comparing the experimental and calculated values,the kinetic equation of this reaction is reasonable and can be used for simulation.
To provide the support of kinetics for hydrolyzing methyl propionate in the industry,the reaction kinetics of methyl propionate hydrolyzed in the presence of NKC-9 cationic-exchange resin catalyst was studied. Without internal and external diffusion,the influences of speed,the amount of catalyst,reaction temperature and mole ratio of the water ester on the conversion of methyl propionate were investigated. The optimal reaction conditions were as follows: speed 400 r/min,catalyst dosage 7%( mass fraction),temperature 343. 15 K,water ester mole ratio 5∶ 1.The kinetics parameters of methyl propionate hydrolysis were measured by fitting the experimental data at 328. 15-343. 15 K. By comparing the experimental and calculated values,the kinetic equation of this reaction is reasonable and can be used for simulation.
引文
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[10]李柏春,高永宽,王晓文,等.酯交换法合成仲丁醇的动力学研究[J].化学工程,2016,44(9):49-54.
[11]邓秀琴,贺小平.对甲苯磺酸催化合成醋酸仲丁酯[J].精细化工中间体,2014,44(1):57-60.
[12]刘勇,卫敏,李西营,等.强酸性阳离子交换树脂催化合成醋酸正丁酯的动力学研究[J].化学研究,2012,23(3):50-53.
[13]许保云.酯交换法合成醋酸正丁酯的催化精馏过程研究[D].天津:天津大学,2009.
[2]金秋.丙酸生产技术和市场现状[J].精细化工原料及中间体,2004(9):24-26.
[3]玄恩锋.丙酸的国内外生产现状及其应用[J].现代化工,1999,19(11):33-35.
[4]LIPPERT F,HOEHN A,SCHAEFER M,et al.Process and catalysts for carbonylation of olefins to carboxylic acids or esters or anhydrides:DE,4424710[P].1996.
[5]LIPPERT F.Process and rhodium catalyst system for preparing carboxylic acids by carbonylation of olefins in the presence of water:EP,759420[P].1997.
[6]JOHN G S.Process for the carbonylation of a reactant comprising the use of an iridium catalyst and a ruthenium or osmium promoter:GB,2298648[P].1996-09-11.
[7]SCHAEFER M,SCHULZ M.Carboxylation process and yhodium catalyst systems for producing carboxylic acids from olefins,water and carbon monoxide:WO,0063145[P].2000.
[8]李正西.丙酸的生产技术及市场[J].精细石油化工进展,2000,1(4):49-52.
[9]张红,李森.用卤仿反应合成丙酸的研究[J].化学与生物工程,2000,17(3):22-24.
[10]李柏春,高永宽,王晓文,等.酯交换法合成仲丁醇的动力学研究[J].化学工程,2016,44(9):49-54.
[11]邓秀琴,贺小平.对甲苯磺酸催化合成醋酸仲丁酯[J].精细化工中间体,2014,44(1):57-60.
[12]刘勇,卫敏,李西营,等.强酸性阳离子交换树脂催化合成醋酸正丁酯的动力学研究[J].化学研究,2012,23(3):50-53.
[13]许保云.酯交换法合成醋酸正丁酯的催化精馏过程研究[D].天津:天津大学,2009.