| 摘要 |
PROBLEM TO BE SOLVED: To provide high quality naphthene-based base oil from a fraction having high contents of aromatics and impurities and having a boiling point higher than gasoline.SOLUTION: Various naphthene-based base oil products of high quality are obtained with a high yield by using low-priced light cycle oil (LCO) and slurry oil (SLO), which are effluents from a fluid catalytic cracking (FCC) process and whose aromatic content and impurity content are high, as raw materials and by first performing hydrotreatment to reduce the content of impurities (sulfur, nitrogen, polycyclic aromatic compounds, various metal components and the like) in a feedstock, subsequently performing hydrodewaxing, and performing fractionation after hydrofinishing the dewaxed fraction. |
