HZSM-5分子筛固体酸催化合成邻苯二甲酸二丁酯的研究  

Study on the Synthesis of Dibutyl Phthalate Catalyzed by Solid Acid of HZSM-5

作　　者：高会奇 蔺志平[1] 刘恺[1] 张朋飞 张凯 葛旭升 Gao Huiqi;Lin Zhiping;Liu Kai;Zhang Pengfei;Zhang Kai;Ge Xusheng(Baoding University,Hebei,071000)

机构地区：[1]保定学院,河北071000

出　　处：《当代化工研究》2023年第11期184-187,共4页Modern Chemical Research

基　　金：保定学院教育教学改革研究与实践项目“应用型本科高校有机化学实验室开放管理的实践探索研究”(项目编号:JG202035)。

摘　　要：本文以邻苯二甲酸酐和正丁醇为原料,HZSM-5分子筛固体酸为催化剂,通过酯化反应合成邻苯二甲酸二丁酯(DBP)。探究了醇酐摩尔比、反应温度、反应时间、HZSM-5分子筛固体酸催化剂的用量以及催化剂的重复性五个因素对邻苯二甲酸二丁酯产率的影响,最后通过傅里叶变换红外光谱仪(IR)及核磁共振氢谱(1H NMR)对产物进行了表征。确定了最佳合成条件:邻苯二甲酸酐0.04mol,醇酐摩尔比为3.75:1、反应温度140℃、反应时间1.5h、HZSM-5分子筛固体酸0.4g,产率最高为74.10%。该催化剂稳定性好,重复使用四次催化产率仍高达67.90%。HZSM-5分子筛固体酸代替浓硫酸作催化剂具有产物易纯化分离、副产物少、污染少而且催化剂可以重复使用等优点,符合绿色化学的理念。In this paper,dibutyl phthalate(DBP)was synthetized by esterification with the molecular sieve HZSM-5 as catalyst,phthalic anhydride and n-butanol as raw materials.The effects of molar ratio of alcohol to anhydride,reaction temperature,reaction time,the dosage of HZSM-5 molecular sieve and the reuse of catalyst on the esterification rate were investigated,the structure of product was characterized by Fourier transform infrared spectroscopy(IR)and Proton Nuclear Magnetic Resonance spectroscopy(1H NMR).The best synthetic conditions were determined and the yield of BDP reached 74.10%after the mixture of phthalic anhydride(0.04 mol)and alcohol(0.15 mol,3.75 equiv)was heated to 140℃for 1.5 hours with HZSM-5 molecular sieve(0.4 g)as catalyst.The activity of the catalyst after being reused four times reduced to 67.90%,which revealed the good stability of the catalyst.Compared with sulfuric acid,solid acid of HZSM-5 molecular sieve as catalyst has the advantages of easy purification and separation of products,less by-products,less pollution and the catalyst can be reused,which conforms to the concept of green chemistry.

关 键 词：HZSM-5分子筛固体酸 邻苯二甲酸酐 正丁醇 邻苯二甲酸二丁酯 

分 类 号：TQ414.1[化学工程]