FIELD: chemistry.
SUBSTANCE: invention relates to a mesoporous and macroporous hydroconversion catalyst with an active phase, to a method of producing said catalyst, as well as to a method of hydrotreating a heavy hydrocarbon feedstock. Hydroconversion catalyst comprises a matrix of calcined aluminum oxide and an active hydrodehydrogenation phase comprising at least molybdenum as a group VIB metal of the Periodic Table of elements, in some cases at least nickel or cobalt as a Group VIII metal of the Periodic Table of Elements, in some cases phosphorus. Active phase is completely introduced by mixing by means of combined rubbing, with said matrix. Catalyst is characterized by specific surface area SBET more than 100 m2/g, median mesopore diameter from 12 to 25 nm, including range boundaries, median macropore diameter from 50 to 250 nm, including the range of the mesopore volume, greater than or equal to 0.65 ml/g, total pore volume greater than or equal to 0.75 ml/g, and macropore volume of 15–35 % of the total pore volume. Method of producing catalyst comprises first step of depositing in aqueous reaction medium at temperature in range of 20 to 90 °C for a period of time from 2 minutes to 30 minutes. Further, suspension is heated to temperature in range from 40 to 90 °C for time of 7 minutes to 45 minutes. Thereafter, a second step of depositing the suspension is carried out at a temperature in range from 40 to 90 °C for a period of time from 2 minutes to 50 minutes. Suspension is then filtered to obtain an aluminum oxide gel. Thereafter, aluminum oxide gel is dried to produce powder. Then, heat treatment stage of powder is performed at temperature from 500 to 1000 °C for a period of time from 2 to 10 hours, in the presence or absence of an air stream containing up to 60 vol. %. water to obtain calcined porous aluminum oxide. Thereafter, a burnt porous aluminum oxide and a solution of at least one metal precursor of the active phase is co-blended to obtain a paste. Then, produced paste is formed. Thereafter, molded paste is dried at temperature less than or equal to 200 °C, to produce dried catalyst. If necessary, the stage of thermal treatment of the dried catalyst is carried out at a temperature lying in range from 200 to 1000 °C, in the presence or absence of water. Method of hydrotreating heavy hydrocarbon feedstock consists in that hydrocarbon raw material is brought in contact with hydrogen and said catalyst.
EFFECT: invention enables to obtain a catalyst having a large volume of mesopores combined with a large volume of macropores, increased diameter of mesopores and an active phase of hydrodehydrogenation.
18 cl, 9 tbl, 8 ex
