α-烯基聚醚磺酸盐的耐盐性能及应用

Salt-resistance property and application of α-olefine polyether sulfonate

以不饱和醇作引发剂利用双金属氰化物（DMC）催化加成共聚环氧丙烷、环氧乙烷,然后磺化中和成盐,研制出一种耐盐活性剂。该活性剂的耐受矿化度范围为2000～150000 mg·L^-1。该活性剂不仅能把高矿化度水的表面张力从80.5 mN·m^-1（30℃）降到37.1 mN·m^-1（30℃）,而且即使水中的Ca2＋、Mg2＋浓度高达10000 mg·L^-1时,其表面活性剂水溶液也是无色透明的,没有任何沉淀和絮状物。在某油田稠油水中矿化度高达150000 mg·L^-1的稠油降黏实验中发现,该活性剂能使含水稠油黏度从85000 mPa·s（30℃）降到14 mPa·s（30℃）,并且还能使脱水后的原油本体黏度降低一半以上。

Epoxyethylene and epoxypropylene were polymerized by double metal cyanide（DMC） with unsaturated alcohol as initiator.The obtained polyether was sulfonated,and neutralized to prepare a salt-resisting surfactant.The surfactant resisted water salinity in a range of 2000 mg·L^-1 to 150000 mg·L^-1.In addition,the surfactant exhibited significant effect on reducing the surface tension of high salinity water from 80.5 mN·m^-1 to 37.1 mN·m^-1 at 30℃.Moreover,even when the concentration of calcium or magnesium cations in the water reached 10000 mg·L^-1,the surfactant solution remained colorless and transparent without deposition and flocculation.The experiment in oil field indicated that the salt-resisting surfactant reduced the viscosity of water-containing heavy oil from 85000 mPa·s to 14 mPa·s.After demulsification,the intrinsic viscosity of the dewatered crude oil decreased by half.