FIELD: chemistry.
SUBSTANCE: invention relates to a method for hydroconversion of heavy oil selected from crude oil, heavy crude oil, asphalt from tar sands, distillation residues, distillation heavy fractions, deasphalted distillation residues, plant oils, oils obtained from coal and oil shale, oils obtained by thermal decomposition of wastes, polymers, biomass, involving feeding heavy oil into a hydroconversion zone, said hydroconversion being carried out in one or more fluidised-bed reactors in which hydrogen is fed, in the presence of a suitable heterogeneous supported hydrogenation catalyst which is made of a support and an active phase which consists of a mixture of sulphides, one of which is obtained from a group VIB metal and at least one more is obtained from a group VIII metal, and a suitable hydrogenation catalyst which is a Mo or W sulphide-based catalyst, which is nanodispersed in said heavy oil, and feeding a stream from the hydroconversion zone into a separation zone in which the separated liquid fraction containing the nanodispersed catalyst is recycled into the fluidised-bed reactor(s).
EFFECT: high degree of hydrodenitrogenation and hydrodesulphurisation, high output of the diesel fraction.
15 cl, 1 dwg, 1 ex, 2 tbl
