Patent ID: 6814856
Filing Date: 2004-11-09
Classification: C10G

Abstract:
A process for converting a gas oil cut into a high cetane number fuel which is dearomatised and desulphurised, said process comprisingat least one first step (a) in which hydrogenation is performed to produce a hydrogenated product, wherein said gas oil cut is passed, in the presence of hydrogen, over a catalyst comprising an amorphous mineral support, at least one metal or compound of a metal from group VIB of the periodic table in a quantity, expressed as the weight of metal with respect to the weight of finished catalyst, of about 0.5% to 40%, at least one non noble metal or compound of a non noble metal from group VIII of the periodic table in a quantity, expressed as the weight of metal with respect to the weight of finished catalyst, of about 0.01% to 30%, and phosphorous or at least one phosphorous compound in a quantity, expressed as the weight of phosphorous pentoxide with respect to the weight of the support, of about 0.001% to 20%; and at least one second step (b) in which hydrocracking is performed to produce an effluent containing light compounds, wherein said hydrogenated product from the first step is passed, in the presence of hydrogen, over a catalyst comprising a mineral support which is partly zeolitic, at least one metal or compound of a metal from group VIB of the periodic table in a quantity, expressed as the weight of metal with respect to the weight of finished catalyst, of about 0.5% to 40% and at least one non noble metal or compound of a non noble metal from group VIII in a quantity, expressed as the weight of metal with respect to the weight of finished catalyst, of about 0.02% to 20%, and then separating said light compounds from the hydrocracking effluent, wherein said gas oil cut introduced into the hydrogenation step has an initial boiling point of at least 150Â° C., at least 90 wt % of which boils at at most 370Â° C., wherein total conversion of the gas oil cut in the hydrocracking and hydrogenation steps is less than 50% w/w.