Hydrogenation catalyst for hydrocarbon oil, carrier for it, and method of hydrogenation of hydrocarbon oil
Provided are a hydrogenation catalyst for hydrocarbon oil, having markedly improved desulfurization activity, denitrogenation activity, and dearomatization activity; a carrier for the catalyst and its production; and a method of hydrogenation of hydrocarbon oil with the catalyst.
1. A method for producing a hydrogenation catalyst, which comprises impregnating a refractory inorganic oxide carrier with a solution comprising a water-soluble titanium compound, then further impregnating with an aqueous solution comprising at least one metal compound of Group 6 and at least one metal compound of Groups 8 to 10 of the Periodic Table, and thereafter heating the impregnated carrier at a temperature not higher than 300° C., wherein the titanium compound is a salt of a titanium-peroxohydroxycarboxylic acid.
2. The method for producing a hydrogenation catalyst as claimed in claim 1 , wherein the refractory inorganic oxide is alumina.
3. The method for producing a hydrogenation catalyst as claimed in claim 2 , wherein the alumina is γ-alumina having a mean pore size of between 50 and 150 angstroms.
4. The method for producing a hydrogenation catalyst as claimed in claim 1 , wherein the amount of titanium in terms of its oxide form falls between 1 and 15% by weight of the refractory inorganic oxide carrier.
5. The method for producing a hydrogenation catalyst as claimed in claim 1 , wherein the metal of Group 6 of the Periodic Table is molybdenum and the metal of Groups 8 to 10 of the Periodic Table is nickel.
6. The method for producing a hydrogenation catalyst as claimed in claim 1 , wherein the hydrogenation catalyst carries a phosphorus compound along with the metal compound of Group 6 and the metal compound of Groups 8 to 10 of the Periodic Table.
7. The method for producing a hydrogenation catalyst as claimed in claim 6 , wherein the amount of phosphorus compound in terms of its oxide form falls between 1 and 6% by weight of the catalyst.
8. The method for producing a hydrogenation catalyst as claimed in claim 1 , wherein the amount of the at least one metal compound of Group 6 in terms of its oxide form falls between 8 and 35% by weight of the catalyst.
9. The method for producing a hydrogenation catalyst as claimed in claim 1 , wherein the amount of the at least one metal compound of Groups 8 to 10 in terms of its oxide form falls between 2 and 10% by weight of the catalyst.
10. A method for producing a hydrogenation catalyst, which comprises impregnating a refractory inorganic oxide carrier with an aqueous solution comprising a salt of a titanium-peroxohydroxycarboxylic acid, then further impregnating with an aqueous solution comprising at least one metal compound of Group 6 and at least one metal compound of Groups 8 to 10 of the Periodic Table.
11. The method for producing a hydrogenation catalyst as claimed in claim 10 , wherein the amount of titanium in terms of its oxide form falls between 1 and 15% by weight of the refractory inorganic oxide carrier.
12. The method for producing a hydrogenation catalyst as claimed in claim 10 , wherein the metal of Group 6 of the Periodic Table is molybdenum and the metal of Groups 8 to 10 of the Periodic Table is nickel.
13. The method for producing a hydrogenation catalyst as claimed in claim 10 , wherein a phosphorus compound is applied to the refractory inorganic oxide carrier along with the metal compound of Group 6 and the metal compound of Groups 8 to 10 of the Periodic Table.
14. The method for producing a hydrogenation catalyst as claimed in claim 13 , wherein the amount of phosphorus compound in terms of its oxide form falls between 1 and 6% by weight of the catalyst.
15. The method for producing a hydrogenation catalyst as claimed in claim 10 , wherein the refractory inorganic oxide is alumina.
16. The method for producing a hydrogenation catalyst as claimed in claim 15 , wherein the alumina is γ-alumina having a mean pore size of between 50 and 150 angstroms.
17. The method for producing a hydrogenation catalyst as claimed in claim 10 , wherein the amount of the at least one metal compound of Group 6 in terms of its oxide form falls between 8 and 35% by weight of the catalyst.
18. The method for producing a hydrogenation catalyst as claimed in claim 10 , wherein the amount of the at least one metal compound of Groups 8 to 10 in terms of its oxide form falls between 2 and 10% by weight of the catalyst.