HYDRODESULFURIZATION CATALYST FOR DIESEL OIL AND HYDROTREATING METHOD FOR DIESEL OIL

摘要

A hydrodesulfurization catalyst supports one or more metals selected from elements in Group 6 of the Periodic table, one or more metals selected from elements in Group 9 or Group 10 of the same, phosphorus, and an organic acid on a composite oxide support having a specific content of both alumina and HY zeolite having a specific crystallite size. The catalyst includes 10% to 40% by mass of the Group 6 metal, 1% to 15% by mass of the Group 9 or Group 10 metal, and 1.5% to 8% by mass of phosphorus in terms of an oxide based on the catalyst. The catalyst includes 0.8% to 7% by mass of carbon derived from an organic acid and for 1 mole of the Group 9 or Group 10 element metal in terms of an element based on the catalyst, and includes 0.2 to 1.2 moles of the organic acid.

主权项

1. A hydrodesulfurization catalyst for diesel oil which supports one or more metals selected from the group consisting of elements in Group 6 of the long periodic table, one or more metals selected from the group consisting of elements in Group 9 or 10 of the long periodic table, phosphorus, and an organic acid on a composite oxide support containing 80% by mass to 99.5% by mass of alumina, and 0.5% by mass to 20% by mass of HY zeolite, the catalyst comprising:
10% by mass to 40% by mass of one or more metals selected from the group consisting of elements in Group 6 in terms of an oxide based on the catalyst; 1% by mass to 15% by mass of one or more metals selected from the group consisting of elements in Group 9 or 10 in terms of an oxide based on the catalyst; 1.5% by mass to 8% by mass of phosphorus in terms of an oxide based on the catalyst; 0.8% by mass to 7% by mass of carbon derived from the organic acid in terms of an element based on the catalyst; and 0.2 moles to 1.2 moles of the organic acid per 1 mole of one or more metals selected from the group consisting of elements in Group 9 or 10 of the long periodic table, wherein a specific surface area measured by a nitrogen adsorption method is from 110 m2/g to 300 m2/g, a pore volume measured by a mercury penetration method is from 0.3 ml/g to 0.6 ml/g, an average pore diameter measured by a mercury penetration method is from 6.5 nm to 14 nm, and the HY zeolite has (a) a SiO2/Al2O3 (molar ratio) of 3 to 10, (b) a crystal lattice constant of 2.435 nm to 2.465nm, (c) a molar ratio of Al in the zeolite framework to total Al of 0.2 to 0.9, and (d) a crystallite diameter of 30 nm to 100 nm.