化工进展

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HZSM-5分子筛催化合成癸二酸二丁氧基乙酯

王筠翔1,陈慕华1,2,刘 准2,曹惠庆2,朱新宝1,2   

  1. 1南京林业大学化工学院,江苏 南京 210037;2江苏省醇醚工程技术研究中心,江苏 无锡 214441
  • 出版日期:2012-12-05 发布日期:2012-12-05

Synthesis of bis(2-butoxyethyl) sebacate catalyzed by HZSM-5

WANG Junxiang1,CHEN Muhua1,2,LIU Zhun2,CAO Huiqing2,ZHU Xinbao1,2   

  1. 1School of Chemical Engineering, Nanjing Forestry University, Nanjing 210037,Jiangsu, China; 2 Jiangsu Alcohol Ethers Engineering Technology Research Center , Wuxi 214441 Jiangsu, China
  • Online:2012-12-05 Published:2012-12-05

摘要: 以癸二酸和乙二醇单丁醚为原料,用HZSM-5分子筛催化合成环保耐寒性增塑剂癸二酸二丁氧基乙酯。考察了催化剂的硅铝比、催化剂用量、带水剂用量、原料配比、反应时间对酯化率的影响。最佳工艺条件为:醇酸摩尔比为2.5∶1,催化剂用量为酸质量的5%,带水剂用量为酸质量的15%,反应时间为3.5 h,反应温度为170~200 ℃,该工艺条件下酯化率可达91.91%。经过5次使用后,酯化率仍在90%以上。同时建立了该酯化合成的表观动力学模型,得到反应速率方程为: 。

关键词: 分子筛, 酯化反应, 动力学

Abstract: The environment-friendly frost resisting plasticizer ( bis(2-butoxyethyl) sebacate ) was synthesized by reaction of sebacic acid(SA) with 2-butoxyethanol(EB) using HZSM-5 as catalyst. The effects of Si/Al ratio, dosage of catalyst, dosage of water-entrainer, raw materials ratio and reaction time on the yield were investigated. The optimal reaction conditions were as follows:n(EB)∶n(SA)=2.5∶1, catalyst (5% of mass of SA), water-entrainer (15% of mass of SA), reaction time (3.5 h) and reaction temperature (170~200℃), the esterification rate was 91.91%. After five times of repeated use, the esterification yield still maintained above 90% over HZSM-5. The apparent kinetics model of esterification was established, and the equation of reaction rate was: .

Key words: zeolite, esterification, kinetics

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