Process for obtaining a ?diesel cut? fuel by the oligomerization of olefins or mixtures thereof

摘要

2-10C olefins are oligomerized in presence of a synthetic zeolite to obtain a stream containing 5-24C oligomerized hydrocarbons. The obtained stream is distilled and the separated 12-24C hydrocarbon stream is hydrogenated to produce a diesel cut fuel having a cetane number of greater than or equal to 48 and having a content of aromatics lower than or equal to 0.4 weight%. 2-10C olefins are oligomerized in presence of synthetic zeolite containing silicon, titanium and aluminum oxide at 180-300[deg]C, at a pressure of greater than 40 atm and at a weight hourly space velocity of greater than or equal to 1 hour -> 1> to obtain a stream consisting of 5-24C oligomerized hydrocarbons. The obtained stream is distilled to separate 12-24C hydrocarbon stream from 5-12C hydrocarbon stream. The separated 12-24C hydrocarbon stream is hydrogenated to produce a diesel cut fuel having a cetane number of greater than or equal to 48 and having a content of aromatics of lower than or equal to 0.4 weight%. The synthetic zeolite contains silica to aluminum in the molar ratio of 100-300, and silica to titania in the molar ratio of greater than 41.