Abstract: The updated development of continuous liquid-phase hydroprecessing technology is introduced, and the main characteristics of the second-generation technology and its industrial application are analyzed. The main improvent in the second-generation technology focused on the development of up-flow reactor-separator and the optimization of the process flow and design of recycle oil system. The research and calculation results show that compared with the first-generation technology, the second-generation technology has simpler process flow, smaller plot plan, lower investment and higher intrinsic safety.

Key words: continuous liquid-phase hydroprocessing, second-generation technology, up-flow reactor-separator, recycle oil system, industrial application