METHOD FOR THE HYDROTREATING OF A HYDROCARBON FRACTION HAVING A BOILING POINT OF HIGHER THAN 250°C IN THE PRESENCE OF A SULFIDE CATALYST PREPARED USING AT LEAST ONE CYCLIC OLIGOSACCHARIDE

摘要

The invention relates to a method for preparing a catalyst containing at least one Group VIII metal, at least one Group VIB metal, and at least one support, wherein the method includes, in series: i) one of the steps selected from among: i1) a step of placing a precatalyst, containing said Group VIII metal, said Group VIB metal, and said support, in contact with a cyclic oligosaccharide containing at least six glucopyranose subunits bonded at a-(1,4); a step i2) of placing the support in contact with a solution containing a precursor of said Group VIII metal, a precursor of said Group VIB metal, and a cyclic oligosaccharide containing at least six glucopyranose subunits bonded at a-(1,4); and i3) a first step of placing said support in contact with a cyclic oligosaccharide containing at least six glucopyranose subunits bonded at a-(1,4), followed by a second step of placing the solid from the first step in contact with a precursor of said Group VIII metal and a precursor of said Group VIB metal; ii) a drying step; and iii) a heat-treatment step.