Abstract: In order to improve the cold flow property and cetane number of diesel, a new diesel hydroupgrading process and RHC-130 catalyst were developed by SINONEC Research Institute of Petroleum Processing. The results show that different types of low solidification point diesels which meet the national V diesel standard under mild conditions can be produced, indicating a good adaptability of RHC-130 catalyst to straight run gas oil, LCO, coker gas oil and their mixed oils. The large improvements in solidification point, cetane number, and yield of diesel can be obtained. The industrial application demonstrates that the－35#, －20# or －10# diesels can be produced by adjusting reaction temperature.

Key words: solidificasion point, flow property, diesel fuel, hydroupgrading process