Hydrogenation catalyst for hydrocarbon oil and process for hydrogenation using the catalyst
A hydrogenation catalyst for a hydrocarbon oil, includes an inorganic porous support composed of at least the oxides of aluminum, phosphorus, and silicon, and supporting at least one active metal selected from the metals of Group 8 of the periodic table, at least one active metal selected from the metals of Group 6 of the periodic table, and phosphorus, the phosphorus chemical shift value of the inorganic support determined by 31 P-CPMAS-NMR having the peak within the range of 0 to −20 ppm. The catalyst can achieve an extremely high level of hydrogenation wherein the hydrocarbon is decreased in sulfur content to 10 ppm by mass or less and in nitrogen content to 3 ppm by mass or less.
1. A hydrogenation catalyst for a hydrocarbon oil, comprising an inorganic porous support composed of at least the oxides of aluminum, phosphorus, and silicon, and supporting at least one active metal selected from the metals of Group 8 of the periodic table, at least one active metal selected from the metals of Group 6 of the periodic table, and phosphorus, the phosphorus chemical shift value of the inorganic support determined by 31 P-CPMAS-NMR having the peak within the range of 0 to −20 ppm.
2. The hydrogenation catalyst according to claim 1 , wherein the phosphorus chemical shift value of the catalyst determined by 31 P-CPMAS-NMR has the peak within the range of 0 to −20 ppm.
3. The hydrogenation catalyst according to claim 1 , wherein the surface area and pore volume of the catalyst sought by the BET method using nitrogen are 295 m 2/ g or smaller and 0.50 ml/g or smaller, respectively.
4. The hydrogenation catalyst according to claim 1 , wherein the content of phosphorus contained in the inorganic porous support is from 0.5 to 10 percent by mass in terms of oxide on the basis of the weight of the support.
5. The hydrogenation catalyst according to claim 1 , wherein the total amount of the Group 8 metal and the Group 6 metal supported on the support is 24 percent by mass or more in terms of oxide on the basis of the weight of the catalyst.
6. A process for hydrogenating a hydrocarbon oil, comprising hydrogenating a hydrocarbon oil using the hydrogenation catalyst according to claim 1 .
7. The process according to claim 6 , wherein the hydrocarbon oil contains a gas oil fraction.
8. The process according to claim 6 , wherein the sulfur and nitrogen contents of the resulting oil produced by hydrogenating the hydrocarbon oil are 10 ppm by mass or less and 2 ppm by mass of less, respectively.
9. The process according to claim 6 , wherein the content of aromatic compounds having two or more rings of the resulting oil produced by hydrogenating the hydrocarbon oil is 4 percent by volume or less.