Abstract: In order to produce low-carbon olefins and high octane gasoline with low olefin content, the enhanced MIP-CGP technology developed by SINOPEC Research Institute of Petroleum Processing Co., Ltd. was used to increase the yield of isoalkanes and propylene in newly built 2.0 Mt/a heavy oil catalytic cracking unit in PetroChina Daqing Petrochemical Company. The inferior heavy oil from Russian crude and Daqing crude were processed by using a special CGP-C (DQ) catalyst. The calibration results indicated that the cracking conditions were more severe for the inferior paraffin oil and residue fractions of Russian crude with poor cracking performance. The enhanced MIP-CGP technology was used to process 63.34% of inferior heavy oil from Russian crude. The optimal reaction temperature was 530 ℃ and the mass ratio of catalyst to oil was 7.5. The yield of LPG was 26.73% (including propylene yield of 8.83%), the total yield of liquid products was 80.82%, the olefin volume fraction of stabilized gasoline was 24.20%, and the research octane number was 93.0, which could meet the requirements of the assessment technical indicators. At the same time, CGP-C (DQ) catalyst had the characteristics of strong catalytic activity, high propylene selectivity and good vanadium resistance.

Key words: catalytic cracking, MIP-CGP technology, Russian crude, stabilized gasoline, propylene