Patent ID: 8236171

Claim:
A process for improving the properties as a fuel of hydrotreated hydrocarbon blends by increasing the cetane index and reducing the density and T95 which comprises: contacting said hydrotreated hydrocarbon blends with hydrogen, in the presence of a catalytic system, comprising: a) one or more metals selected from the group consisting of Pt, Pd, Ir, Ru, Rh and Re, and b) a silico-aluminate of an acidic nature selected from the group consisting of a zeolite belonging to the MTW family and a completely amorphous micro-mesoporous silico-alumina, wherein the completely amorphous silico-alumina has a molar ratio SiO 2 /Al 2 O 3 ranging from 30 to 500, a surface area greater than 500 m 2 /g, a pore volume ranging from 0.3 to 1.3 ml/g, and an average pore diameter lower than 40 Å wherein said hydrotreated hydrocarbon blends comprise one or more benzonaphthene compounds and wherein the contacting converts at least a portion of the benzonaphthene compounds to one or more alkylbenzene compounds.