Synthesis and Performance Evaluation of a Betaine Surfactant

¹ Xi’an Key Laboratory of Tight oil (Shale oil) Development (Xi’an Shiyou University)
² Shaanxi Key Laboratory of Carbon Dioxide Sequestration and Enhanced Oil Recovery
³ College of Petroleum Engineering, Xi’an Shiyou University Xi’an, Shaanxi, China
⁴ Oil Production Plant 11 of PetroChina Changqing Oilfiled Company, Qingyang, Gansu, China
⁵ Training Center of PetroChina Changqing Oilfield Company Xi’an, Shaanxi, China
⁶ Oil Production Plant 2 of PetroChina Changqing Oilfiled Company Qingyang, Gansu, China

^a* Corresponding author: rongjunzhang@xsyu.edu.cn
^b e-mail: 779601154@qq.com
^c e-mail: 1633044581@qq.com
^d e-mail: 263324027@qq.com
^e e-mail r: 691834708@qq.com
^f e-mail: 669212972@qq.com

Abstract

Using sodium bisulfite and epichlorohydrin as raw materials, the ring-opening reaction is carried out under the action of acatalyst to produce sodium 3-chloro-2-hydroxypropane sulfonate, followed by dodecyl tertiary amine, isopropanol, sodium hydroxide and 3-chloro-2-hydroxypropane sulfonate sodium as raw materials, under certain conditions to synthesize dodecyl hydroxy sulfobetaine surfactant. The surface tension, interfacial tension, salt resistance and emulsification properties of the synthesized surfactants were tested and evaluated. The experimental results show that the surfactant has a low critical micelle concentration and surface tension; the interfacial tension decreases with the increase of surfactant concentration. When the concentration is greater than or equal to 0.3%, the interfacial tension reaches 10-2 level; the dodecyl hydroxy sulfobetaine surfactant solution shows good salt resistance; when the concentration of dodecyl hydroxy sulfobetaine surfactant solution is 0.5%, the water separation rate in 120 minutes is the lowest and the emulsification ability is the strongest.