Abstract: High wax content paraffin-base vacuum residue was refined by solvent deasphalting process to obtain deasphalted oil, and then treated by hydrotreating-isodewaxing-hydrofinishing process, and vacuum distillation to obtain high value-added lube base oil series products. Research results showed that by controlling high pressure hydrogenation depth and adjusting the distillation cutting point, a series of base oils of 90BS, HVIH14, HVIH8, HVIH4, and HVIH2 could be produced. The total yield, based on deasphalted oil feedstocks, could reach around 75%, while total yield was about 34% based on vacuum residue. The differential utilization of vacuum residue can be realized.

Key words: vacuum residue, solvent deasphalting, high pressure hydrotreating, lubricating base oil