Abstract: A series of experiments for DCC-PLUS technology was carried out on pilot plant unit. Results showed that as compared with DCC technology, the yields of LPG, propylene and butylenes in DCC-PLUS process were enhanced significantly, at the same time, the yields of dry gas and coke were reduced; the induction period of gasoline reached 529 min. The improvement in product slates and product selectivity was even more significant when processing residue blended feedstock with DCC-PLUS technology.

Key words: catalytic cracking, propylene, butylenes, butylenes