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据国际能源机构(IEA)预测,2030年我国石油消费量的80%需要依靠进口。在世界原油价格大幅攀升的局势下,大量的石油进口无疑成为我国经济发展的沉重负担,必须加大石油开采力度。目前,大庆油田所用的较好的三次采油用表面活性剂是进口的石油磺酸盐ORS-41,这种表面活性剂价格昂贵,达2万～2.5万元/t。经分析,这种进口石油磺酸盐的主要成分是各种烷基苯磺酸盐的混合物,其中单烷基苯磺酸盐占18%,二烷基苯磺酸盐占16%,因此,研究二烷基苯磺酸盐表面活性剂的性质,可为三次采油用重烷基苯磺酸盐表面活性剂的复配提供理论依据。为了研究不同结构的二烷基苯磺酸盐分子结构与其表面活性的关系,以烷基苯为原料,经过酰化、格氏反应、碘与红磷还原、磺化、中和等步骤,合成了6种二烷基苯磺酸盐,并用~1HNMR对产品进行了表征,用Wilheimy-Plate法在20℃下测定了二烷基苯磺酸盐水溶液的表面性能,结果表明,苯环在烷基链的位置影响产品的表面张力和表面吸附性能。
According to the International Energy Agency (IEA), 80% of China’s oil consumption in 2030 needs to be imported. With the sharp rise in world crude oil prices, a large amount of oil imports will undoubtedly become a heavy burden on China’s economic development and petroleum exploitation must be intensified. Currently, the better tertiary oil recovery surfactant used in Daqing Oilfield is imported petroleum sulfonate ORS-41, which is expensive, ranging from 20,000 to 25,000 yuan / t. After analysis, the main component of this imported petroleum sulfonate is a mixture of various alkyl benzene sulfonates, in which the mono-alkyl benzene sulfonate accounts for 18% and the dialkyl benzene sulfonate accounts for 16% Studying the properties of dialkylbenzene sulfonate surfactant can provide a theoretical basis for the compounding of heavy alkyl benzene sulfonate surfactant in tertiary recovery. In order to study the relationship between molecular structure and surface activity of dialkylbenzenesulfonates with different structures, alkylbenzene was used as the starting material to synthesize the alkylbenzene through acylation, Grignard reaction, reduction of iodine and red phosphorus, sulfonation and neutralization Six kinds of dialkylbenzenesulfonates were synthesized and the products were characterized by ~ 1HNMR. The surface properties of dialkylbenzene sulfonate aqueous solution were determined by Wilhelmyy-Plate method at 20 ℃. The results showed that the benzene ring in the alkane The location of the base chain affects the product’s surface tension and surface adsorption properties.