以磷钨酸为催化剂的丁二酸二丁酯的合成及其动力学研究.pdf

文档介绍：第 21 卷第 4 期高校化学工程学报
2007 年 8 月 Journal of Chemical Engineering of Chinese Universities Aug. 2007
文章编号:1003-9015(2007)04-0627-06
以磷钨酸为催化剂的丁二酸二丁酯的合成及其动力学研究

孙晓波, 黄强, 任珂, 封洋, 刘国际
(郑州大学化工学院, 河南郑州 450002)

摘要:采用磷钨酸为催化剂、甲苯为带水剂,以丁二酸和丁醇合成丁二酸二丁酯。利用均匀设计实验考察醇酸摩尔
比、带水剂用量、催化剂用量、反应时间因素对收率的影响,筛选出最佳工艺条件:醇酸摩尔比为 :1;催化剂用量
为酸质量的 %;带水剂用量为体系总质量的 22%;反应时间为 2 h,丁二酸二丁酯收率可达 %以上。对实验
数据进行回归处理,获得不同反应条件下动力学参数,结果表明,该酯化反应服从二级不可逆动力学模型。反应表观
−1 −1 −1
活化能 Ea = kJ⋅mol ,指前因子 k0 =×108 mol ⋅L⋅min 。
关键词:丁二酸二丁酯;合成;均匀设计;动力学
中图分类号:; 文献标识码:A

Study on Synthesis of Dibutyl inate Catalyzed by Phosphtungstic Acid
and its Reaction ics

SUN Xiao-Bo, HUANG Qiang, REN Ke, FENG Yang, LIU Guo-ji
(Department of Chemical Engineering, Zhengzhou University, Zhengzhou 450002, China)

Abstract: Dibutyl inate was synthesized by using inate acid and n-butanol as reactants,
phosphotungstic acid as catalyst and toluene as azeotropic agent. The optimum synthesis conditions affecting
the yield of dibutyl inate, such as the amount of catalyst, molecular ratio of n-butanol to inate acid,
amount of azeotropic agent used and reaction time, were investigated by the experiments according to uniform
design. The results indicate that % yield of dibutyl inate could be obtained with following optimal
reaction conditions: the m