Optimizing the Process Conditions for the Production of Lube Base Oil From Heavy Distillate

In order to meet the increasing process demand of heavy crude, the deep processing of heavy oils, especially the vacuum residue, may be a best choice. The authors selected ketone-benzol dewaxing, furfural refining, clay finishing (AFC); and furfural refining, ketone-benzol dewaxing, clay finishing (FAC) were selected to process base oils. Elemental analysis, n-d-M method, and ¹H nuclear magnetic resonance were used to investigate the structure characteristics of base oils. Experimental data show that the FAC process conditions are more rigorous than AFC process, the yield of AFC process is higher than that of FAC process, but their base oils have their advantages and disadvantages.