新型Gemini表活剂的合成及其降低油水界面张力性能

以胱氨酸钠和油酰氟为原料，通过1步反应合成了一种新型阴离子Gemini表面活性剂--二油酰胺基胱氡酸钠（Sodiumdioleoylaminoeystine，SDOLC），并利用界面张力仪研究了SDOLC降低油水界面张力性能。结果表明．利用地层水配制质量分数为0．10％的SDOLC溶液，可以在低碱质量分数下与大庆油田原油达到10-2111N／m量级的界面张力Ca^2＋和Mg^2＋的存在使体系油水界面张力升高，络合剂羟基乙叉二膦酸四钠HEDP·Na4可以屏蔽Ca^2＋和Mg^2＋对界面张力的影响．增强体系的耐Ca^2＋和Mg^2＋能力，并降低碱剂的用量。

Synthesis and property of new Gemini surfactant in reducing oil-water interfacial tension

A new anionic Gemini surfactant, sodium dioleoylamino cystine （SDOLC） was synthesized by one-step reaetion of sodium cystine and oleoyl chlorine. The propery of reducing oil-water interfacial tension was investigated by interlace tensinmeter. It was found that S1）OLC solution of 0.1% content, made up by formation water, can obtain the interfaeial tension of 10^-2 mN/m magnitude of crude oil in Daqing Oilfieht at low alkali concentration. The oil-water interracial tension increases with the concentratinn of Ca^2＋ and Mg^2＋ increased, whereas this adverse effects were screened by adding complexing agent tetra sodium of 1-hydroxy ethylidene-1, l-diphosphonic acid（HEDP.Na4）. Furthermore, the presence of HEDP.Na4 improves the Ca^2＋, Mg^2＋ toleranee ability and reduces the alkali concentration fiw the SI）OLC/NaOH/HEI）P· Na4 mixed system.