FIELD: chemistry.
SUBSTANCE: present invention relates to methods of hydrotreating hydrocarbon raw material, having weighted average temperature (TMP), exceeding 380 °C. Described is a method of hydrotreating at least one hydrocarbon feedstock having a weighted average temperature (TMP) greater than 380 °C, wherein method is carried out at temperature in range from 250 to 430 °C, at total pressure in range from 4 to 20 MPa, at ratio of volume of hydrogen and volume of hydrocarbon raw material in range from 200 to 2,000 litres per litre and at hour volume rate (VVH), defined as ratio of volumetric flow rate of liquid hydrocarbon material to volume of catalyst loaded into reactor, in range of 0.5 to 5 h-1, wherein method uses at least one catalyst containing at least one metal from group VIB and/or at least one metal from group VIII of periodic table of elements, and carrier containing amorphous mesoporous aluminium oxide, wherein said aluminium oxide is obtained by carrying out at least the following steps: a) at least one first step of depositing aluminium oxide in the aqueous reaction mixture based on at least one basic precursor selected from sodium aluminate, potassium aluminate, ammonia, sodium hydroxide and potassium hydroxide, and at least one acid precursor selected from aluminium sulphate, aluminium chloride, aluminium nitrate, sulphuric acid, hydrochloric acid and nitric acid, a step for heating the suspension obtained after step (a), carried out between step (a) and second precipitation step (a'), which is carried out at a temperature in range of 20 to 90 °C for a period of time from 7 to 45 minutes; a') a second deposition step which is carried out between the first deposition step a) and the heat treatment step b), said second deposition step a') is carried out by adding to the suspension at least one basic precursor and one acid precursor, b) a step for thermal treatment of the suspension obtained after step a) at a temperature in range from 50 to 200 °C for a period of time of 30 minutes to 5 hours; c) a step for filtering the suspension obtained after step b) of heat treatment, followed by performing at least one step of washing the obtained gel; d) drying aluminium oxide gel obtained after step c) to obtain powder; e) a step for forming a powder obtained after step d) to obtain a raw material; f) a step for thermal treatment of raw material obtained after step e) at a temperature in range of 500 to 1000 °C, optionally in air current containing up to 60 vol. % of water.
EFFECT: technical result is the development of a hydroprocessing method, which enables to perform improved denitrogenation of raw materials, hydrogenation of aromatic compounds contained in the raw material, and desulphurisation of the raw material.
12 cl, 6 ex, 8 tbl
