FIELD: chemistry.
SUBSTANCE: invention relates to a catalyst for hydrogenating hydrocarbons, comprising polyunsaturated and / or aromatic compounds, a method of producing said catalyst and a hydrogenation method. Catalyst comprises calcined oxide matrix comprising predominantly aluminium oxide, and an active phase comprising nickel, wherein the active phase, through complete comulling, is introduced into the calcined oxide matrix, comprising predominantly aluminium oxide. Said matrix has content of calcined aluminium oxide of 90 wt. % or more with respect to total weight of said matrix. Nickel content ranges from 5 to 65 wt. % per element relative to total weight of catalyst. Active phase does not contain a group VIB metal. Nickel particles have a diameter varying from 1.5 to 15 nm. In the catalyst, the median mesopore diameter is in range of 8 to 25 nm, the median macropore diameter ranges from 300 to 1500 nm, the volume of mesopores determined by mercury porosimetry ranges from 0.30 to 0.55 ml/g, and total pore volume determined by mercury porosimetry ranges from 0.34 to 0.85 ml/g and macropore volume is in range of 10 to 40 % of total pore volume. Method of producing the catalyst includes the following steps: a) step of converting into aqueous solution an acid precursor of aluminium; b) a step for controlling pH by adding to the suspension obtained at step a) at least one basic precursor; c) a step for co-precipitation of the suspension obtained at the output of step b), by adding to the suspension at least one basic precursor and at least one acid precursor; d) a step of filtering the obtained suspension to obtain aluminium oxide gel; e) a step of drying aluminium oxide gel to obtain a powder; f) a step for thermal treatment of the obtained powder; g) a step for plasticising calcined porous aluminium oxide; h) a step of moulding the obtained paste; i) a step of drying the moulded paste.
EFFECT: method enables to obtain a catalyst in which distribution of pores, as well as size of nickel particles are adapted to hydrogenation reactions to facilitate diffusion of reactants into pores and further reaction thereof with the active phase.
12 cl, 2 tbl, 7 ex
