SCI和EI收录∣中国化工学会会刊

›› 2017, Vol. 25 ›› Issue (2): 171-174.doi: 10.1016/j.cjche.2016.08.031

• Selected Papers from the International Chemical Separation Technology Conference (ICSTC) • 上一篇    下一篇

Removal of mercaptans from light oils using ionic liquid-NaOH aqueous solution as extractants

Jianwei Li, Xiang Li, Yan Liu, Jie Zhang   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • 收稿日期:2016-06-10 修回日期:2016-08-28 出版日期:2017-02-28 发布日期:2017-03-14
  • 通讯作者: Jie Zhang E-mail:zhangjie@mail.buct.edu.cn

Removal of mercaptans from light oils using ionic liquid-NaOH aqueous solution as extractants

Jianwei Li, Xiang Li, Yan Liu, Jie Zhang   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2016-06-10 Revised:2016-08-28 Online:2017-02-28 Published:2017-03-14

摘要: The application of ionic liquids as alternatives to conventional organic solvents in the extraction process has been investigated. In the present study, fourteen species of imidazolium-based ionic liquids were added into the NaOH (aq) to remove the mercaptans. The influences of anion species and cation alkyl chain length of the imidazolium-based ionic liquids on the performance of mercaptan removal from light oils have been discussed. The efficiency of extraction for mercaptans exhibited the order of [Ac]- > [OH]- ≈[Br]- > [BF4]-. The longer alkyl chain imidazolium-based ionic liquids contributed to enhance desulfurization rate of 1-butyl mercaptan. 100% desulfurization rate of 1-butyl mercaptan was achieved by the anion of Ac- ionic liquids and NaOH (aq) at a volume ratio of 40:1 (V(oil):V(ionic liquid)) and a short equilibrium time within 10 min.

关键词: Extraction, Ionic liquids, NaOH, Light oil, Mercaptan removal

Abstract: The application of ionic liquids as alternatives to conventional organic solvents in the extraction process has been investigated. In the present study, fourteen species of imidazolium-based ionic liquids were added into the NaOH (aq) to remove the mercaptans. The influences of anion species and cation alkyl chain length of the imidazolium-based ionic liquids on the performance of mercaptan removal from light oils have been discussed. The efficiency of extraction for mercaptans exhibited the order of [Ac]- > [OH]- ≈[Br]- > [BF4]-. The longer alkyl chain imidazolium-based ionic liquids contributed to enhance desulfurization rate of 1-butyl mercaptan. 100% desulfurization rate of 1-butyl mercaptan was achieved by the anion of Ac- ionic liquids and NaOH (aq) at a volume ratio of 40:1 (V(oil):V(ionic liquid)) and a short equilibrium time within 10 min.

Key words: Extraction, Ionic liquids, NaOH, Light oil, Mercaptan removal