表面活性剂DPS的性能优化研究

Research of Performance Optimization for DPS Surfactant

孔德彬 李宜强 岳增存 向建安 杨怀军 刘天洋

KONG Debin LI Yiqiang YUE Zengcun XIANG Jian’an YANG Huaijun LIU Tianyang

为了明确各种助剂对石油磺酸盐界面活性的影响进而优化表面活性剂性能，通过对表面活性剂DPS分离提纯，在提取物石油磺酸盐添加不同类型、不同浓度的无机盐、碱、醇，测定各混合溶液与原油的界面张力，研究了影响石油磺酸盐表面活性剂界面活性的三个主要因素，给出了表面活性剂DPS的优化配方GDPS，并与原表 面活性剂DPS进行了对比。研究结果表明，不同类型的碱、无机盐和醇在一定浓度下可以分别使石油磺酸盐溶液与原油间的界面张力达到10-3、10-2和10-1mN/m数量级。优化后表面活性剂GDPS中的最佳助剂为碳酸钠、氯化钠、正辛醇，加量分别为0.8%、8%和0.2%。与原表面活性剂DPS相比，优化后表面活性剂GDPS溶液与原油间的界面张力值降低了一个数量级，达到最低界面张力的最小质量分数降低了20%。图5 参10

For figuring out the effects of different assistants on petroleum sulfonate and optimizing the performance of DPS surfactant，GDPS surfactant were obtained through the process of separation of DPS surfactant（petroleum sulfonate）and remixing with different kind of alkali，inorganic salt and alcohols in a range of concentrations. The interfacial tension between the mixed solution and crude oil were measured to probe the effects of different assistants on petroleum sulfonate. The more effective formulation of GDPS surfactant and its difference with original DPS surfactant was given. The experiment results showed that the oil-water interfacial tension could be decreased to 10-3，10-2 and 10-1mN/m after adding alkali，inorganic salt and alcohols in a certain concentration into the petroleum sulfonate solution，respectively. The better assistants for GDPS surfactant were sodium carbonate， sodium chloride and n-octyl alcohol with the optimum mass fraction of 0.8%，8% and 0.2%，respectively. Compared with original DPS surfactant，the optimized GDPS surfactant could make the interfacial tension decrease by one order of magnitude. The minimum concentration of GDPS surfactant reached the lowest interfacial tension value reduced in the fraction of 20%.

10.19346/j.cnki.1000-4092.2016.04.024