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用相图方法研究轻柴油／海水微乳的形成。体系相图由水或人工海水（盐度分别为S＝0，10，115，29．471和41．071）／柴油／表面活性剂（AS、CTAB或BRIJ35）／助表面活性剂（正丁醇）在40℃时构成。本文分别研究了表面活性剂类型，油、醇、表面活性剂三者配比及海水盐度对微乳形成的影响。研究结果表明：三种表面活性剂中CATB，酸与表面活性剂的重量比值大于0．43，含油量≤25％，最适宜于形成微乳；形成微乳区面积分数随柴油含量增加而减少，也随海水盐度增加而减少，微乳区总面积分数随海水盐度变化率CTAB＞AS＞BRIJ35，三种表面活性剂体系的微乳区总面积分数依次为CTAB＞AS＞BRIJ35；在含紫油量＞50％时，三体系主要形成的W／O微乳区，在柴油含量≤25％时，对于CTAB体系可形成O／W至W／O连续变化微乳区，对于AS体系，可形成W／O和O／W两个独立的微乳区，而对于BRIJ35体系只形成W／O微乳区。
Study on the Formation of Light Diesel / Seawater Microemulsion Using Phase Diagram Method. The phase diagram is composed of water or artificial seawater (salinity S = 0, 10, 115, 29.471 and 41.071, respectively) / diesel / surfactant (AS, CTAB or BRIJ35) / cosurfactant Alcohol) at 40 ° C. In this paper, the effects of surfactant type, oil, alcohol, surfactant ratio and seawater salinity on the formation of microemulsion were studied. The results show that the weight ratio of CATB to acid and surfactant in the three surfactants is more than 0.43 and the oil content is less than or equal to 25%, which is most suitable for the formation of microemulsion. The microemulsion area fraction decreases with the increase of diesel oil content , But also decreased with the increase of seawater salinity. The total microemulsion fraction increased with the change of seawater salinity CTAB> AS> BRIJ35. The total microemulsion area fractions of the three surfactant systems were CTAB> AS> BRIJ35. With the amount of purple oil> 50%, the W / O microemulsion mainly formed by the three systems can form O / W to W / O continuous microemulsion for the CTAB system when the diesel content is less than 25%. For the AS system , Can form two separate micro-emulsion regions of W / O and O / W, while only a W / O micro-emulsion region is formed for BRIJ35 system.