Catalytic chlorination of 2-chlorotoluene with gaseous chlorine to 2,6-dichlorotoluene over AlCl3, FeCl3, ZnCl2, and [BMIM]Cl–nAlCl3 (–2FeCl3 and –2ZnCl _{详细信息    查看全文}

• 作者：Xiaoyan Zhu ; Yujun Fu ; Hengbo Yin ; Aili Wang…
• 刊名：Reaction Kinetics, Mechanisms and Catalysis
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：118
• 期：2
• 页码：523-536
• 全文大小：603 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Catalysis
  Industrial Chemistry and Chemical Engineering
  Physical Chemistry
  
• 出版者：Akad茅miai Kiad贸, co-published with Springer Science+Business Media B.V., Formerly Kluwer Academic
• ISSN：1878-5204
• 卷排序：118

文摘

Catalytic chlorination of 2-chlorotoluene (OCT) with Cl₂ to dichlorotoluene (DCT) over metal chlorides and Lewis acid ionic liquids was investigated. The catalytic activities of the metal chlorides for the selective chlorination of OCT to high value 2,6-DCT were in the order of AlCl₃ > FeCl₃ > ZnCl₂. When the weight ratios of AlCl₃ to OCT were 0.5:100–2:100 at 10–30 °C for 12 h, the selectivity of 2,6-DCT was kept at ca. 33 %. The catalytic activities of the ionic liquids for the selective chlorination of OCT to 2,6-DCT were in the order of [BMIM]Cl–AlCl₃ < [BMIM]Cl–2ZnCl₂ < [BMIM]Cl–2FeCl₃ < [BMIM]Cl–2.5AlCl₃ < [BMIM]Cl–2AlCl₃. When the weight ratio of [BMIM]Cl–2AlCl₃ to OCT was 2:100 at 10–30 °C for 12 h, the selectivity of 2,6-DCT was kept at ca. 34 %. As compared with the metal chlorides, the ionic liquids exhibited high catalytic activities for the chlorination of OCT to DCT, correspondingly.KeywordsMetal chlorideLewis acid ionic liquid2-ChlorotolueneChlorination2,6-Dichlorotoluene