化工学报 ›› 2014, Vol. 65 ›› Issue (1): 176-181.DOI: 10.3969/j.issn.0438-1157.2014.01.022

• 催化、动力学与反应器 • 上一篇    下一篇

1,1,1,3,3-五氯丙烷合成的反应动力学

许晓涛, 张未星   

  1. 浙江大学化学工程与生物工程学系, 浙江 杭州 310027
  • 收稿日期:2013-05-26 修回日期:2013-09-20 出版日期:2014-01-05 发布日期:2014-01-05
  • 通讯作者: 张未星
  • 作者简介:许晓涛(1988-),男,硕士研究生。

Kinetics of synthesis of 1,1,1,3,3-pentachloropropane

XU Xiaotao, ZHANG Weixing   

  1. Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, China
  • Received:2013-05-26 Revised:2013-09-20 Online:2014-01-05 Published:2014-01-05

摘要: 以铁粉为催化剂前体,磷酸二丁酯为助催化剂,对四氯化碳与氯乙烯合成1,1,1,3,3-五氯丙烷的调聚反应动力学进行了研究。考察了铁粉用量、助催化剂用量及反应温度对反应的影响。研究结果表明:在反应物料比n(CCl4):n(VnCl)=1:0.25,反应温度353~388 K范围内该反应为一级反应,反应活化能为69.15 kJ·mol-1,得到了氯乙烯消耗速率的动力学方程。动力学研究结果表明,在无催化剂条件下反应遵循纯自由基机理,而在催化剂存在条件下反应遵循非链式氧化还原机理。

关键词: 1,1,1,3,3-五氯丙烷, 合成, 反应动力学, 铁粉, 磷酸二丁酯, 自由基

Abstract: The telomerization reaction kinetics of synthesis of 1,1,1,3,3-pentachloropropane promoted with iron powder as catalyst precursor and dibutyl phosphate as co-catalyst was studied. The effects of reaction temperature, amount of iron powder and co-catalyst on the reaction were investigated. It was found that the telomerization reaction was of first order and activation energy was 69.15 kJ·mol-1. A reaction kinetic equation was presented. This reaction followed a free radical reaction mechanism in the absence of catalyst, but followed a non-chain redox mechanism in the presence of catalyst.

Key words: 1,1,1,3,3-pentachloropropane, synthesis, reaction kinetics, iron powder, dibutyl phosphate, radical

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