Abstract: MIP-CGP special catalyst was used in a 3.0 Mt/a gas oil catalytic cracking unit to carry out industrial test of blending desulphurized residue in a large proportion. Based on the main operating parameters, properties of raw materials and products, material balance and energy consumption during the blending period, the operation of the device was analyzed and summarized. The results showed that the reaction temperature and catalyst scorch were well controlled whenthe large proportion of desulfurized residue was blendedin the MIP process FCC unit,the goal of long-term operationwas realized, the energy consumption of the unit was effectively reduced, and the processing load of the unit was increased,which provided an effective way to increase the load of the residue hydrogenation unit and the whole plant.

Key words: gas oil, catalytic cracking, blending, desulfuried residue, load, benefits