Abstract: Solvent refining of VGO No.5 using N-methyl-2-pyrrolidone(NMP) and furfural separately were studied. Based on the optimum operation conditions of NMP and furfural refining, simulating three stages about NMP and furfural extracting VGO No.5 and dewaxing the refined oil were carried out. The properties of refined oil and dewaxed oil were analyzed. The qualities of refined oil from single stage refining using NMP and furfural were closed to. The dewaxed oil of two can satisfy the indication of quality. For NMP refining, compared with furfural refining, the solvent to oil ratio dropped down 50% and the yield increased 7%. For simulating three stages refining using NMP, as compared to furfural, the solvent to oil ratio dropped down 50% and the yield increased 4%. The qualities of refined oils are closed to and better than these of single stage refining oils. The study show that NMP refining had a better result than furfural refining.

Key words: Lube stock, N-methyl-2-pyrrolidone, Refining, Furfural

摘要： 采用单级抽提试验，模拟工业装置连续逆流抽提（假三段试验），以沈北－大庆混合油的减五线馏分油为原料进行了ＮＭＰ和糠醛溶剂精制的对比研究。在单级抽提试验所确定出的ＮＭＰ和糠醛精制最优操作条件基础之上，进行了假三段抽提试验及ＮＭＰ精制油脱蜡试验。对单级抽提及假三段抽提所得精制油及脱蜡试验所得脱蜡油进行了各项性质分析。结果表明，在适宜操作条件下ＮＭＰ和糠醛单级抽提所得精制油质量接近，二者的脱蜡油均能满足国家质量指标要求。但ＮＭＰ精制的剂油体积比下降５０％，精制油收率提高７％。与糠醛假三段相比，ＮＭＰ假三段溶剂精制的剂油体积比下降５０％，收率提高４％。两种精制油质量基本相同，均好于适宜操作条件下单级抽提所得到的精制油的质量。同时也说明了ＮＭＰ比糠醛有更好的精制效果。

关键词: 润滑油 , ＮＭＰ , 精制 , 糠醛