Process for converting olefins to gasoline, distillate and alkylate liquid hydrocarbons

摘要

A continuous process for upgrading C3-C4 hydrocarbon feed containing olefins to produce heavier liquid hydrocarbons comprising converting a major portion of C3-C4 olefins in an oligomerization zone by contacting a shape selective medium pore zeolite catalyst at elevated temperature and pressure to make distillate and olefinic gasoline; fractionating the oligomerization stage effluent to provide distillate and gasoline product and a C3-C4 intermediate stream containing isobutane and unconverted propene and butylene; and combining the C3-C4 intermediate stream with a portion of C3-C4 feed and further converting the combined streams in an alkylation zone to make heavier paraffinic hydrocarbons. The olefin feed may be produced by catalytically converting methanol or similar oxygenated hydrocarbons in a known process.