SCI和EI收录∣中国化工学会会刊

Chin.J.Chem.Eng. ›› 2018, Vol. 26 ›› Issue (12): 2636-2640.doi: 10.1016/j.cjche.2018.03.010

• Energy, Resources and Environmental Technology • Previous Articles     Next Articles

Effect of monovalent anions on cationic Gemini micro-emulsion

Yinglu Gu, Shuang Chen, Hui'e Liu, Yubin Wang, Pingping Zhou   

  1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum(East China), Qingdao 266580, China
  • Received:2017-12-27 Revised:2018-03-07 Online:2018-12-28 Published:2019-01-09
  • Contact: Shuang Chen E-mail:chsh1030@163.com
  • Supported by:

    Supported by China Petroleum Science and Technology Innovation Fund (2017D-5007-0601), State Key Laboratory of Heavy Oil Processing and China University of Petroleum (East China) 2018 Graduate Engineering Innovation Project Found (SLKZZ-2017002).

Abstract: Micro-emulsion usually consists of water, oil, surfactants and co-surfactants, and each component has an effect on the phase behavior and solubilization of the micro-emulsion. When the surfactant in the micro-emulsion system is quaternary ammonium cationic Gemini surfactant, the surfactant mainly combines with the anions in the salt. With the increase of salt concentration, the phase transformation of Winsor I → Winsor Ⅲ → Winsor Ⅱ occurred, but the optimum salinity and salt width are different because of the type of salt. The effects of 5 different kinds of monovalent anions, including C6H5SO3-, I-, Br-, NO3- and Cl-, on the phase behavior and solubilization of quaternary ammonium cationic Gemini micro-emulsion are researched by Winsor phase diagram. It is found that the effects of organic anions C6H5SO3- and I- on the phase behavior and solubilization of quaternary ammonium cationic Gemini micro-emulsion are most significant, and the effects of Br-, NO3- and Cl- are less significant. Meanwhile, when the optimum solubilization is achieved, the amount of sodium benzoate is the least, indicating that the organic anion has stronger self-organization behavior with quaternary ammonium cationic Gemini surfactants.

Key words: Gemini surfactant, Monovalent anions, Micro-emulsion, Phase behavior, Solubilization