Development of the CF-4 10W/30 diesel engine oil from the regenerative base oil

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.