Abstract: The high value added products were prepared by high pressure hydrogenation-isomerization dewaxing- hydrofinishing and then precision fractionation process using naphthenic heavy vacuum gas oil as feedstock. The test results showed that by controlling the hydroprocess depth and the cutting temperature of precision fractionation, the high value added rubber plasticizer, transformer oil and light white oil could be obtained. The product distribution can be adjusted according to market demand, leading to maximized benefits of enterprises.

Key words: vacuum gas oil, hydrogenation, precision fractionation