混合烷基苯磺酸盐的制备、评价及分析

三次采油需要大量的高性价比磺酸盐类表面活性剂。以炼油厂馏分油为主要原料，AlCl3为催化剂合成混合烷基苯，再与发烟硫酸反应制备混合烷基苯磺酸盐，并评价合成样品的综合性能。结果表明，所制备的混合烷基苯磺酸盐与胜利油田Ⅰ、Ⅱ类油藏4个区块原油的界面张力达到了5×10^-3mN/m以下，对Ⅲ类油藏原油界面张力达到3×10^-2mN/m，且具有较宽的浓度窗口、较高的耐盐性能、较低的吸附性能、与聚合物较好的配伍性能，综合性能明显优于同类产品。红外光谱、质谱和碳数分布分析结果表明其组成比石油磺酸盐复杂，更接近于原油的组成。

SYNTHESIS,EVALUATION AND ANALYSIS OF MIXED ALKYLBENZENE SULFONATES

Tertiary oil recovery requires a large number of cost-effective sulfonate surfactants. Mixed alkylbenzene sulfonates were synthesized with fuming sulphuric acid using different distillate oils as raw materials and anhydrous aluminum trichloride as catalyst. The comprehensive properties of synthetic samples were evaluated. The interfacial tension between the mixed alkylbenzene sulfonate and the typeⅠ and Ⅱ crude oil of four blocks in Shengli oil field was less than 5×10^-3 mN/m and the interfacial tension was 3×10^-2 mN/m for the type Ⅲ crude oil. Moreover, the synthesized sulfonate has a wider concentration window, higher salt tolerance, lower adsorption performance, better compatibility with polymer and better comprehensive performance than similar products. The analysis of infrared, mass spectrum and carbon distribution showed that the composition is more complex than that of petroleum sulfonate and more similar to that of crude oil.