摘要
针对三次采油对表面活性剂低界面张力和高耐盐性的需求,以工业级支链十六醇为原料,与环氧乙烷聚合反应合成了支链十六醇聚氧乙烯醚(i-C16OH5EO)表面活性剂,采用吊片法和旋转滴法分别测试了i-C16OH5EO的表面活性和油水界面张力。结果表明:疏水基支链化的i-C16OH5EO表面活性较高,其临界胶束浓度(CMC)为6.3 mg/L,临界胶束浓度所对应的表面张力为27.8 m N/m;此外,i-C16OH5EO能显著降低油水界面张力,其与癸烷的界面张力达到10-3m N/m数量级,与原油的界面张力亦能达到10-2m N/m数量级,且具有较强的耐盐性。
Low interfacial tension and high salt-tolerance surfactants are now necessary for enhanced oil recovery.In the present study,branched hexadecanol polyethoxylene ester(i-C16OH5EO)was synthesized via polymerization of ethylene oxide using branched hexadecanol as starting agent.The surface activities and oil/water interfacial tension of i-C16OH5EO were determined by Wilhelmy method and spinning drop technique,respectively.Results showed that the critical micelle concentration(CMC)of i-C16OH5EO was 6.3 mg/L,and the corresponding surface tension was 27.8 mN/m.What′more,the i-C16OH5EO also showed high ability of reducing oil/water interfacial tension.The interfacial tension between decane and i-C16OH5EO aqueous(0.03%)was almost 10-3 mN/m,and the interfacial tension between crude oil and i-C16OH5EO aqueous reached 10-2 mN/m under the codition of NaCl 10%.This results indicated that the present surfactant possesses high salt-tolerance.
作者
严峰
齐亚会
方洪波
陈栋梁
刘晓云
金伟男
YAN Feng;QI Ya-hui;FANG Hong-bo;CHEN Dong-liang;LIU Xiao-yun;JIN Wei-nan(State Key Laboratory of Separation Membranes and Membrane Process,Tianjin Polytechnic University,Tianjin 300387,China;School of Chemistry and Chemical Engineering,Tianjin Polytechnic University,Tianjin 300387,China;Sinopec Petroleum Engineering Co.Ltd Dongying 257026,Shandong Province,China;Research Institute of Exploration and Development,Petro China Xinjiang Oilfield Company,Xinjiang Karamay 834000,China)
出处
《天津工业大学学报》
CAS
北大核心
2019年第1期45-49,共5页
Journal of Tiangong University
基金
天津市科技特派员项目(14JCTPJC00568)
关键词
支链型十六醇聚氧乙烯醚
合成
表面活性剂
表面张力
界面张力
branched hexadecanol polyethoxylene ester
synthesis
surfactant
surface tension
interfacial tension
