针对溶剂精制再生废润滑油环保、经济、高效的特点,应用四碳醇极性溶剂为萃取剂、聚丙烯酰胺为絮凝剂进行再生废润滑油研究,采用单因素实验方法考察工艺条件的影响,得到的最佳工艺条件为:萃取溶剂为异丁醇、精制时间15 min、精制温度25℃(室温)、剂油质量比5、絮凝剂用量1.0％.该工艺条件下再生油产率达82.1％,再生油理化指标得到明显改善,黏温指数达130以上、闪点超过200℃、酸值为0.01 mgKOH/g、残炭降低到0.01％以下,表明采用该精制工艺再生废润滑油是可行的,有一定的应用前景.%Solvent refining is not only an environmental-friendly process but also one of the cheapest and most efficient processes for waste lubricating oils recycling. In this work, single factor experimental design was adopted,four carbon alcohols were used as polar extraction solvents, polyacrylamide(PAM) was used as flocculant to regenerate waste lubricating oil. The optimal process conditions were obtained as follows: using isobutyl alcohol as extraction solvent, a solvent/oil mass ratio of 5, a PAM amount of 1. 0%,a refining time of 15 min and refining temperature of 25 °C(room temperature). The yield of the recovered oil under such conditions was 82. 1% ,some of the physicochemical properties of this recovered oil were improved significantly, such as viscosity index reached more than 130, the flash point was over 200 °C ,the content of carbon residue was less than 0. 01% and the acid number was 0. 01 mgKOH/g, which indicated that this technology for waste lubricating oil recycling is feasible and may have a promising application future.
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