Research On New Process Of Waste Lubricating Oil Regeneration

At present,there are many kinds of waste lubricating oil regeneration processes,such as catalytic hydrogenation and sulfuric acid white clay refining process.However,some of the higher costs are not suitable for China's national conditions,and some will produce more contaminated impurities such as acid slag,which will not meet environmental protection requirements.The objective of this study is to find a waste lubricating oil regeneration process with simple operation,low cost,low pollution and high recovery rate.Under the requirements of green chemistry,waste will be turned into treasure and resources that can be recycled.This paper proposes a new process for the regeneration of waste lubricating oil into lubricating base oil.The process has three stages.First,removing the mechanical impurities and large particle impurities in the waste lubricating oil by pretreatment.Second,most of the colloid and asphaltene in the waste lubricating oil are removed by hot extraction sedimentation,and the solvent is distilled off under reduced pressure.Finally,the activated clay is used to further purify the waste lubricating oil.The performance evaluation of the finally obtained lubricating base oil basically conforms to the standard of the brand HVI-100 lubricating oil.The total recovery rate of the process is about 63.48%,and it costs 1314.6? to refinery one metric ton of waste lubricating oil.Comparing the infrared(IR)spectrum of the waste lubricating oil with that of the finally obtained lubricating base oil,the IR spectrum shows that the effective component of the lubricating base oil are basically unchanged,but the impurity content is reduced,which proves the effectiveness of the new process.