Abstract: The 800kt/a propane deasphalting unit of a petrochemical company adopts the ROSE technology to utilize the potential energy and thermal energy from the effluents with high temperature and pressure. The extraction column and supercritical separation tower use high efficiency structured packings. The heat transfer oil is used for heating. An innovative structure of the heater and a high efficiency energy saving burner are used. Using the same vacuum residue and propane solution, the comprehensive energy consumption of 800 kt/a propane deasphalting unit adopting ROSE technology is 21.7% lower than that of the comparative 250 kt/a unit.