废润滑油再生分子蒸馏窄分技术应用研究

Study on precise distills in waste oil regeneration by molecular distillation

针对废润滑油再生过程设计了多级分子蒸馏新工艺,进行了基础油馏分的窄分技术研究。以汽修厂废内燃机油为实验材料进行了工艺验证,并在沙特石化产品公司废润滑油处理量3万t/a的再生厂中成功运用。分析结果显示,三级分子蒸馏馏分代表性指标分别符合MVI100、MVI250和MVI350基础油技术标准,总体收率92.1%。实践表明,废润滑油再生分子蒸馏窄分工艺可靠,能够得到多种优质的基础油产品,且具有较高的得率,为进一步完善分子蒸馏技术在废润滑油再生中的工业化应用提供了基础。

The new technology of multi-stage molecular distillation is introduced for waste oil regeneration process, in which the precise distills of base oil is studied. It is proved to be effective by experiment with the material of waste engine oil from engine maintenance workshop, also successfully applied in the waste oil regeneration plant of Petroleum Products Company- Saudi Arabia with the treatment capacity of 30 kt/a. The cut from different molecular distillation stages is found to be comparable with typical standards of MVI100,MVI250 and MVI350, respectively, and the overall yield of 92.1% is got in the process. The practice shows that a sound method to get a high yield of good base oils proves to be reliable. It enhances the industrial application in waste oil regeneration with molecular distillation.