New FCC process minimize gasoline olefin, increases propylene

02/10/2003
An FCC process called flexible dual-riser fluid catalytic cracking (FDFCC) can minimize gasoline olefins and increase propylene significantly.Using available FCC catalysts, the FDFCC unit produces a gasoline with 10-35 vol % olefins, while increasing propylene yield by about 6 wt % points vs. conventional FCC units.These conclusions are based on demonstration trial runs of a 120,000- tonne/year (tpy) FDFCC unit, which was revamped from an existing residue fluid catalytic cracking unit (RFCCU).The FDFCC process, developed by Luoyang Petrochemical Engineering Corp. (LPEC), an affiliate of China Petroleum & Chemical Corp. (Sinopec), is designed to minimize olefins in catalytically cracked ga...
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