磺酸盐与磺酸盐表面活性剂协同作用研究

Studies on the Synergism between Sulfonate and Sulfonate Surfactant

李文宏 张永强 李兆国 郭 勇 王立成

Li Wenhong Zhang Yongqiang Li Zhaoguo Guo Yong Wang Licheng

为获得具有性能优良的表面活性剂，研究了磺酸盐与磺酸盐表面活性剂在降低油水界面张力方面的协同作用。选取了十二烷基苯磺酸钠（C12ΦS）与4-(7'-十四烷基)苯磺酸钠 (7C14ΦS)、4-(8'-十八烷基)苯磺酸钠 (8C18ΦS)，绘制了磺酸盐及复配体系的烷烃扫描曲线，考察了表面活性剂的亲水亲油性能、复配比例对协同作用的影响及磺酸盐及复配体系降低原油界面张力的能力。证实了磺酸盐与磺酸盐复配协同作用源自亲水亲油性能的改善，亲油性磺酸盐8C18ΦS与亲水性磺酸盐C12ΦS、7C14ΦS复配，可以获得具有适中亲水亲油性能的复配体系，实现协同降低界面张力作用，通过适当的磺酸盐表面活性剂复配可使长庆油田原油与1%NaCl水溶液的界面张力降低至超低值。图5参10

In order to obtain the surfactant with good performance, the synergism between sulfonate and sulfonate surfactant for lowering interfacial tension at oil/water interface was studied. The dodecyl alkylbenzene sulfonate（C12ΦS）, 4-(7'- tetradecyl) benzene sulfonate (7C14ΦS) and 4-(8'-octadecyl) benzene sulfonate (8C18ΦS) and two branched alkylbenzene sulfonates were selected, the alkane scanning curves of the sulfonates and their mixtures were obtained, the effects of hydrophilic-lipophilic abilities of sulfonates and mixing ratio on synergism were investigated, and the tensions of sulfonates and their mixtures against crude oil were measured. Experiment results showed that the synergism between sulfonates derived from the amelioration of the hydrophilic-lipophilic ability, when the hydrophilic sulfonate was mixed with the lipophilic sulfonate, a surfactant mixture with a moderate hydrophilic-lipophilic ability could be produced, and synergism action decreasing interfacial tension could be achieved. After adding proper complex sulfonate surfactants, the interfacial tension between the crude oil of Changqing oilfield and the 1% NaCl solutions could decrease to be a ultra-low value.