Abstract: The flow diagram of the hydrocracking unit in original design in SINOPEC Maoming Company composed of steam strip followed by fractionation to produce heavy naphtha, jet fuel, diesel, and tail oil. The diesel cut was used as blending component of diesel pool of the plant. As the market changes, the unit was planned to be revamped to maximize the production of jet fuel and 5# industrial grade white oil instead of diesel blending cut. Two solutions were suggested: (?) increasing the temperature of diesel side stripper feed, (ii) adding new side line in fractionation column. The results indicate that the qualified 5# industrial grade white oil can be produced by both solutions but the latter is preferred, by which premium grade 5# white oil can be produced.

Key words: hydrocracking, industrial grade white oil, revamping, application effect