Abstract: The refining of vehicle waste lubricant oil using the furfural as the main solvent and sodium dodecyl benzene sulfonate as the cosolvent were studied. The influence of mixed solvent ratio, extraction temperature and other factors on the yield and quality of recovery refined oil are also investigated. It turns out that when the temperature is 80 ℃, the catalyst oil ratio is 1.5, the additive precentage of sodium dodecyl benzene sulfonate is 0.025%, the properties of refined oil with high yield[KG*3](91.26%)[KG*3]is[KG*3]listed[KG*3]as follows: the viscosity index is 116.83, the refractometer index on 25 ℃ is 1.441, the chromatic is 2.0, the condensation point -19 ℃, w(carbon residue) is 0.496%. The refined lubricated oil after adding some additive can meet the requirements of lubricant oil, and can be reused.

Key words: Waste oil, Solvent refined, Furfural, Sodium dodecyl benzene sulfonate

摘要： 研究了以糠醛作为主溶剂、添加十二烷基苯磺酸钠作为助溶剂时，剂油体积比、温度、助溶剂质量分数等因素对精制油收率、粘度指数、折光率等性质的影响。结果表明：在温度为８０℃、剂油体积比为１．５、ｗ（助溶剂）为０．０２５％时，所得回收精制油的粘度指数为１１６．８３，２５℃折光率为１．４４１，色度为２．０，凝点为－１９℃，ｗ（残炭）为０．４９６％，回收精制油收率为９１．２６％。车用废润滑油回收精制后再配以适当的添加剂，可作为符合标准的润滑油使用。　

关键词: 废润滑油, 溶剂精制, 　糠醛, 十二烷基苯磺酸钠