FIELD: chemistry.
SUBSTANCE: hydrotreating catalyst including: a carrier particle including a porous, heat-resistant inorganic oxide and a selenium component, wherein the said carrier particle further includes, at least, one hydrogenating metal component. The carrier particle includes a mixture of the said inorganic heat-resistant oxide and the said selenium component. Moreover, the said mixture is calcined to form a calcined selenium-containing carrier before the inclusion of the said, at least, one hydrogenating metal component therein. The concentration of the selenium-containing component in the carrier particle is in the range of or about of 0.05 wt % to or up to about 2.85 wt % of the dry inorganic heat-resistant oxide of the calcined carrier particle and in terms of elemental selenium. The said, at least, one hydrogenating metal component comprises a Group VIII metal-component in the form of a nickel component or a cobalt component and a Group VIB metal in the form of a molybdenum component or a tungsten component. The method of producing the above-described hydroprocessing catalyst includes the following steps: preparing a carrier particle comprising a porous inorganic heat-resistant oxide; including a selenium compound in the said carrier particle to form a selenium-containing carrier; calcining the said selenium-containing carrier to form a calcined selenium-containing carrier including the said porous inorganic heat-resistant oxide and a selenium component. The concentration of the selenium-containing component on the carrier particle is in the range of or about of 0.05 wt % to or up to about 2.85 wt % of the dry inorganic heat-resistant oxide of the calcined carrier particle and based on elemental selenium, the inclusion of, at least, one hydrogenating metal comprising a Group VIII metal component in the form of a nickel component or a cobalt component and a Group VIB metal component, molybdenum or tungsten component to the said calcined selenium-containing carrier to form a carrier comprising selenium and the included metal including the said inorganic heat-resistant oxide and the selenium component; and calcining the said carrier containing selenium and the included metal including the said heat-resistant inorganic oxide and the selenium component; and calcining the carrier containing the selenium and the included metal, in order to provide the said hydrotreating catalyst. The hydrotreating method consists in contacting a hydrocarbon feedstock with the said hydrotreating catalyst under the conditions of a hydrotreating process. The claimed invention also discloses a method for improving the properties of a hydrotreating catalyst including a porous inorganic heat-resistant oxide carrier and, at least, one hydrogenating metal component comprising: including the selenium component into the said porous inorganic heat-resistant oxide carrier, calcining the said selenium-containing carrier to form the calcined selenium-containing carrier. The concentration of the selenium-containing component in the carrier particle is in the range of or about of 0.05 wt % to or up to about 2.85 wt % of the dry inorganic heat-resistant oxide of the calcined carrier particle and in terms of elemental selenium. The said, at least, one hydrogenating metal component comprises a Group VIII metal component in the form of a nickel component or a cobalt component and a Group VIB metal in the form of a molybdenum component or a tungsten component.
EFFECT: production of hydrotreating catalysts having improved desulfurization activity.
10 cl, 1 dwg, 5 tbl, 4 ex
