RECYCLE OF UNCONVERTED HYDROCRACKED RESIDUAL TO HYDROCRACKER AFTER REMOVAL OF UNSTABLE POLYNUCLEAR HYDROCARBONS

摘要

ABSTRACT OF THE DISCLOSUREHydrocracking and separating process for upgradingunconverted residuals 80 as to increase liquid yields whileat the same time decrease fouling of the hydrocrackingreactor upon recycling of the upgraded residual to thehydrocracker. The unconverted residual from thehydrocracking unit is treated in a separation stage with alight hydrocarbon solvent so as to remove the polynuclearhydrocarbons from the residual prior to recycling.