FLUIDIZED CATALYTIC CONVERSION METHOD FOR MAXIMIZING PRODUCTION OF PROPYLENE

• Main Authors: LUO, Yibin, DU, Lingyin, XU, Youhao, HAN, Yueyang, SHU, Xingtian, WANG, Xieqing, ZUO, Yanfen, ZHANG, Yunpeng
• Format: Patent
• Language: English; French; German
• Published: 01.11.2023
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; LUBRICANTS; METALLURGY; MINERAL WAXES; ORGANIC CHEMISTRY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE

Disclosed is a fluidized catalytic conversion method for maximizing the production of propylene, comprising the steps of: 1) contacting a heavy feedstock oil with a catalytic conversion catalyst having a temperature of 650 °C or higher for reaction; 2) contacting a hydrocarbon oil feedstock having an olefin content of 50 wt% or more with the catalytic conversion catalyst after the reaction of step 1); 3) separating a first catalytic cracking distillate oil and a second catalytic cracking distillate oil from the resulting reaction products; 4) separating an olefin-rich stream from the first catalytic cracking distillate oil; and 5) recycling the olefin-rich stream. The method can effectively improve the yield of propylene and realize an effective utilization of petroleum resources.