废机油在预处理后,采用分子蒸馏设备对其进行了蒸馏分离,得到的轻组分再进行加氢精制,生成再生润滑油。元素分析显示精制前后硫含量下降约66.3%。以再生润滑油与68#机械油调和成再生基础油,作为柴油机油的基础油。实验结果表明,再生基础油的抗磨性较好,这与再生基础油中残存的少量抗磨剂有关。再生基础油的抗氧化安定性不佳,是由于精制过程中脱除了油品中的抗氧化成分—含硫多环化合物,可通过添加苯三唑衍生物T551等金属减活型抗氧剂来改善。再生基础油的起泡性较大,需加大抗泡剂用量。研制的CF-4 10W/30柴油机油,其抗磨性、倾点等优于参比油,其它性能相当,完全可以作为商用柴油机油使用。
The molecular distillation equipment was used to separate the waste oil which was pretreated.The light fraction then was hydro treated to produce the regenerative lubricating oil.Elemental analysis shows that the sulfur content in the oil was decreased by about 66.3% after the hydro fining.The regenerative base oil was obtained by blending some 68# mechanical oil into the regenerative lubricating oil.The experimental results showed that the abrasion resistance of the base oil is good,because there remains a small amount of the anti-wear agent after the regeneration process.The base oil’s oxidation stability is poor,due to the antioxidants-sulfur-containing polycyclic compounds was removed in the hydro fining process,which can be improved by adding metal deactivation agent like T551-a derivative of benzotriazole.The regenerative base oil is easy to foaming,which can be reduced by increasing the addition amount of anti-foam agent.The abrasion resistance and pour point of the developed CF-4 10W/30 diesel engine oil are better than the reference oil and other performances are equivalent to theirs.So the developed diesel engine oil can be used as an alternative of the commercial engine oil.
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