| 摘要 |
Process for obtaining a "diesel cut" fuel having a CN cetane number equal to or greater than 48 and a content of aromatics lower than 0.4% by weight starting from olefins or their mixtures, characterized in that it comprises the following steps: oligomerizing said olefins having from 2 to 10 carbon atoms in the presence of synthetic zeolites containing silicon, titanium and aluminum oxides, having a molar ratio SiO2/Al2O3 ranging from 100 to 300, a molar ratio SiO2/TiO2 greater than 41 and a extraframework titanium oxide content which is zero or less than 25% with respect to the whole titanium oxide present, at a temperature ranging from 180 to 300° C., at a pressure greater than 40 atm and a WHSV space velocity equal to or greater than 1 h-1, in order to obtain a stream essentially consisting of oligomerized C5-C24 hydrocarbons; distilling the stream obtained from the oligomerization in order to separate a C12-C24 hydrocarbon stream from a C5-C12 hydrocarbon stream; hydrogenating the separated C12-C24 hydrocarbon stream.
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