초록 ▼

A process for the hydrotreatment of a heavy hydrocarbon fraction containing sulfur and metal impurities comprises at least two steps: a first step using a catalyst comprising a low proportion of at least one metal of groups V, VI and VIII, said catalyst being in the form of a plurality of juxtaposed

A process for the hydrotreatment of a heavy hydrocarbon fraction containing sulfur and metal impurities comprises at least two steps: a first step using a catalyst comprising a low proportion of at least one metal of groups V, VI and VIII, said catalyst being in the form of a plurality of juxtaposed agglomerates each formed of a plurality of acicular plates, the plates of each agglomerate being generally oriented radially with respect to one another and with respect to the center of the agglomerate, the carrier of this catalyst being preferably inert; and a second step using a catalyst which could be of the same type but with a higher proportion of metals. This process is useful for the conversion of crude oils, straight run hydrocarbon residues, deasphalted oils, asphalts dissolved in aromatic distillates and coal hydrogenates.

대표청구항 ▼

A process for the hydrotreatment of a heavy hydrocarbon fraction containing sulfur impurities and metal impurities, comprising the steps of: (a) passing said hydrocarbon fraction in admixture with hydrogen, under hydrodemetallation conditions, over a catalyst comprising a carrier and from 0.1 to 5%

A process for the hydrotreatment of a heavy hydrocarbon fraction containing sulfur impurities and metal impurities, comprising the steps of: (a) passing said hydrocarbon fraction in admixture with hydrogen, under hydrodemetallation conditions, over a catalyst comprising a carrier and from 0.1 to 5% by weight, calculated as metal oxides, of at least one metal or compound of a metal from at least one of groups V, VI and VIII, said catalyst being in the form of a plurality of juxtaposed conglomerates each formed of a plurality of acicular plates, the plates of each conglomerate being generally oriented radially with respect to one another and with respect to the center of the conglomerate, wherein said catalyst contains a major proportion of wedge-shaped mesopores, and has an improved resistance to pore mouth plugging compared with bimodal or monomodal porous catalysts; and (b) treating the effluent from step (a) with hydrogen, under hydrodesulfuration conditions, in contact with a catalyst containing a carrier and from 7 to 30% by weight, calculated as metal oxides, of at least one metal or compound of a metal from at least one of groups V, VI and VIII.