COMBINED METHOD FOR HYDROGENATION AND CATALYTIC CRACKING OF RESIDUAL OIL

摘要

A combined method for hydrogenation and catalytic cracking of residual oil is provided. In the method, the hydrogenation of a residual oil raw material is performed in the presence of hydrogen and a hydrogenation catalyst; the effluent of the hydrogenation is subjected to gas-liquid separation to obtain a gas phase and a liquid phase; the gas phase is circularly used for hydrogenation; the liquid phase is directly fed to a catalytic cracking device without fractionation; after dry gases, liquefied gases and the catalytic cracking of gasoline are separated from the effluent of the catalytic cracking reaction, the catalytic cracking heavy fraction is obtained and mixed with a hydrogenating raw material to undergo hydrogenation. Compared with the prior art, the method can produce gasoline with a maximum yield and can save equipment investment, make full use of reaction heat energy and reduce production energy consumption at the same time.