萃取-絮凝组合精制再生废润滑油

根据溶剂精制再生废润滑油环保、经济、高效的特点,采用单因素实验方法,应用极性溶剂为萃取剂、乙二胺为絮凝剂,组合精制再生废润滑油。最佳工艺条件为:萃取剂为正丁醇,精制时间为15 min,精制温度为25℃,剂/油质量比为5∶1,絮凝剂添加比例为1.0%。以该精制工艺操作,再生油性能指标得到明显改善,黏温指数达130以上,闪点达200℃,酸值为0.05 mg.g-1,灰分质量分数降低到0.01%以下,金属元素含量显著下降,再生油产率为80.6%,各项性能基本上符合HVI150基础油指标,表明该精制工艺再生废润滑油可行,应用前景广阔。

Regeneration of Waste Lubricating Oil by Extraction-flocculation Composite Refining Technique

Solvent refining is known for its low pollution,low cost and high efficiency in waste lubricating oil recycling.With the extraction solvents of polar solvents and the flocculant of 1,2-ethanediamine,the single-factor experimental method is used to regenerate waste lubricating oil.The optimal process conditions are obtained as follows:the polar solvent being n-butanol,the refine time being 15 min,the refine temperature being 25 ℃,the mass ratio of solvent to oil being 5∶ 1,and the 1,2-ethanediamine amount being 1.0%.The properties of regenerated oil are improved greatly,with viscosity index exceeding 130,the flash point reaching 200 ℃,the acid number being 0.05 mg·g-1,and the ash content decreasing below 0.01%.Metallic content decreases dramatically.Under the optimal technology conditions,the total yield of regenerated oil reaches 80.6%.The quality of the regenerated oil could reach the HVI150 standard of base oil,showing this technology of regeneration is a promising way to regenerate waste lubricating oil.