| 摘要 |
Process and apparatus for upgrading light olefinic crackate gas from a fluidized catalytic cracking unit having a riser reactor for contacting hot solid cracking catalyst with a heavy hydrocarbon feedstock, said light crackate gas containing ethene, propene and other C1-C4 lower aliphatics, comprising the steps of: reacting the light olefinic gas in contact with a fluidized bed of acid medium pore zeolite catalyst particles under oligomerization and/or aromatization conditions to produce a hydrocarbon effluent stream rich in C5+ hydrocarbons and a byproduct light gas rich in C1-C4 saturated hydrocarbons; separating the oligomerization reaction effluent stream to provide a second light gas stream and a condensed liquid hydrocarbon product stream; and recycling at least a portion of the second gas stream to the fluidized catalytic cracking unit as a lift gas for fluidizing solid cracking catalyst particles in a lower riser portion of said cracking unit. |
