Catalysts for hydrodesulfurization and hydrodenitrogenation of hydrocarbon oils are provided which have high catalytic activity, excellent productivity and low pollution. The catalysts are made from an alumina carrier substance, at least one active metal element selected from the Group VI metals in
Catalysts for hydrodesulfurization and hydrodenitrogenation of hydrocarbon oils are provided which have high catalytic activity, excellent productivity and low pollution. The catalysts are made from an alumina carrier substance, at least one active metal element selected from the Group VI metals in the periodic table, at least one active metal element chosen from the Group VIII metals in the periodic table, phosphoric acid, and an additive agent. The additive agent is at least one substance selected from dihydric or trihydric alcohols having 2-10 carbon atoms per one molecule, ethers of the alcohols, monosaccharides, disaccharides, and polysaccharides. A method for preparing the catalysts is also provided and includes impregnating the alumina carrier substance with a solution mixed with a certain amount of the active metal elements, phosphoric acid and the additive agent, and drying the impregnated carrier substance at a temperature of less than 200°C.
대표청구항▼
A catalyst for hydrotreating hydrocarbon oils, comprising an impregnated alumina carrier substance having a porous surface, wherein said catalyst has been prepared by a process consisting of the steps of simultaneously impregnating an alumina carrier substance with components in a mixture to form an
A catalyst for hydrotreating hydrocarbon oils, comprising an impregnated alumina carrier substance having a porous surface, wherein said catalyst has been prepared by a process consisting of the steps of simultaneously impregnating an alumina carrier substance with components in a mixture to form an impregnated substance, and then drying said impregnated substance at a temperature of less than 200°C. such that supported active metal salts on said impregnated substance are not decomposed to form oxides, wherein said components in said mixture comprise: at least one active metal element selected from the Group VI metals in the periodic table; at least one active metal element selected from the Group VIII metals in the periodic table; phosphoric acid; and an additive agent, wherein said additive agent exhibits lower coordinate ability than alcoxycarboxylic acid and is at least one substance selected from the group consisting of dihydric or trihydric alcohols having 2-10 carbon atoms per one molecule, ethers of said alcohols, monosaccharides, disaccharides and polysaccharides, and wherein both said active metals and said at least one additive are dispersed and adsorbed on the surface of said alumina carrier substance and remain at fixed sites during drying so as to suppress aggregation of active metals when employed in a subsequent presulfurization process, and wherein said temperature is such that moisture is removed from said impregnated substance but decomposition and evaporation of the adsorbed additive is prevented. A method for preparing a hydrotreating catalyst for hydrocarbon oils consisting of the steps of: simultaneously impregnating an alumina carrier substance having a porous surface with a solution comprising: at least one active metal element selected from the Group VI metals in the periodic table; at least one active metal element selected from the Group VIII metals in the periodic table; phosphoric acid; and at least one additive selected from the group consisting of dihydric and trihydric alcohols having 2-10 carbon atoms per one molecule, ethers of said alcohols, monosaccharides, disaccharides, and polysaccharides, to form an impregnated carrier substance containing supported active metals and said at least one additive; and drying said impregnated carrier substance at a temperature of less than 200°C. at which moisture content is removed but said active metal salts are not decomposed to form oxides, wherein both said active metals and said at least one additive are dispersed and adsorbed on the porous surface of said alumina carrier substance and are fixed at sites during drying to suppress aggregation of active metals during subsequent presulfurization.
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