机油在使用过程中,由于空气的氧化作用、机械杂质的混入及燃料的稀释,机油中的胶质、沥青、有机酸和机械杂质的含量不断增加,而粘度(有时升高)、闪点、燃点则显著降低,这些都促使机油降低润滑作用,以致不能继续使用。除去废机油中的氧化产物、机械杂质及燃料后,废机油仍可恢复为良好的机油。废机油再生的方法很多,我们采用了硫酸洗涤、白土接触处理、水蒸气蒸馏及 Oil in use, due to air oxidation, mechanical impurities and fuel dilution, oil in the gums, bitumen, organic acids and mechanical impurities in increasing content, and the viscosity (sometimes increased), flash point, The ignition point is significantly reduced, which all contribute to the lubricating oil to reduce lubrication, so that can not continue to use. Remove the waste oil oxidation products, mechanical impurities and fuel, the waste oil can still be restored as a good oil. There are many ways to regenerate waste oil, we use sulfuric acid washing, clay contact treatment, steam distillation and