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A method for producing an aviation fuel oil base, including: a first step of obtaining a first generated oil by hydrotreating a feedstock by bringing a feedstock which includes an oxygen-containing hydrocarbon compound derived from an animal or vegetable oils and fat into contact with a first dual f

A method for producing an aviation fuel oil base, including: a first step of obtaining a first generated oil by hydrotreating a feedstock by bringing a feedstock which includes an oxygen-containing hydrocarbon compound derived from an animal or vegetable oils and fat into contact with a first dual functional catalyst which has dehydrogenation and hydrogenation functions and which includes a metal of group 6B of the periodic table, a metal of group 8, and an amorphous solid acidic substance, in the presence of hydrogen; and a second step of obtaining a second generated oil including an aviation fuel oil base by hydroisomerizing the first generated oil by bringing the first generated oil into contact with a second dual functional catalyst which has dehydrogenation and hydrogenation functions and which includes a metal of the group 8 of the periodic table and a crystalline solid acidic substance, in the presence of hydrogen.

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1. A method for producing an aviation fuel oil base, comprising: first obtaining a first generated oil by hydrotreating a feedstock which contains an oxygen-containing hydrocarbon compound derived from an animal or vegetable oils and fat by bringing the feedstock into contact with a first dual funct

1. A method for producing an aviation fuel oil base, comprising: first obtaining a first generated oil by hydrotreating a feedstock which contains an oxygen-containing hydrocarbon compound derived from an animal or vegetable oils and fat by bringing the feedstock into contact with a first dual functional catalyst which has dehydrogenation and hydrogenation functions and which comprises a metal of group 6B of the periodic table, a metal of group 8, and an amorphous solid acidic substance, in the presence of hydrogen, wherein the feedstock contains 1 to 100 mass ppm in terms of sulfur atoms of a sulfur-containing hydrocarbon compound, and wherein the sulfur content included in the first generated oil is 10 mass ppm or less; andthen obtaining a second generated oil comprising an aviation fuel oil base by hydroisomerizing the first generated oil by bringing the first generated oil into contact with a second dual functional catalyst which has dehydrogenation and hydrogenation functions and which comprises a metal of group 8 of the periodic table and a crystalline solid acidic substance, in the presence of hydrogen;wherein the cracking ratio is no greater than 20 mass % when obtaining the second generated oil by hydroisomerizing the first oil. 2. The method for producing an aviation fuel oil base according to claim 1, wherein the metal of group 6B of the periodic table in the first dual functional catalyst is molybdenum and/or tungsten, and the metal of group 8 of the periodic table in the first dual functional catalyst is cobalt and/or nickel, andwherein the method comprises sulfiding the first dual functional catalyst, before the bringing the feedstock into contact with a first dual functional catalyst. 3. The method for producing an aviation fuel oil base according to claim 1, wherein the crystalline solid acidic substance in the second dual functional catalyst is a crystalline substance comprising at least one crystal selected from the group consisting of a one-dimensional, 10-member ring aluminosilicate having an MEL structure, a TON structure, an MTT structure, and an MRE structure, and a silicoaluminophosphate having an AEL structure. 4. The method for producing an aviation fuel oil base according to claim 1, wherein the crystalline solid acidic substance in the second dual functional catalyst comprises a one-dimensional, 10-member ring aluminosilicate and/or a silicoaluminophosphate, anda total content of the one-dimensional, 10-member ring aluminosilicate and the silicoaluminophosphate is 65 to 85 mass %. 5. The method for producing an aviation fuel oil base according to claim 3, wherein the one-dimensional, 10-member ring aluminosilicate comprises at least one selected from the group consisting of ZSM-11, ZSM-22, ZSM-23, and ZSM-48, and the silicoaluminophosphate comprises at least one selected from the group consisting of SAPO-11 and SAPO-34. 6. The method for producing an aviation fuel oil base according to claim 1, wherein a hydroisomerization ratio exceeds 90 mass %. 7. An aviation fuel oil composition, containing a first aviation fuel oil base obtained by the method for producing an aviation fuel oil base according to claim 1 and a second aviation fuel oil base produced from a petroleum-based feedstock, wherein a content of the first aviation fuel oil base is 5 to 50 mass % and a content of the second aviation fuel oil base is 50 to 95 mass %. 8. The method for producing an aviation fuel oil base according to claim 4, wherein the one-dimensional, 10-member ring aluminosilicate comprises at least one selected from the group consisting of ZSM-11, ZSM-22, ZSM-23, and ZSM-48, and the silicoaluminophosphate comprises at least one selected from the group consisting of SAPO-11 and SAPO-34. 9. An aviation fuel oil composition, containing a first aviation fuel oil base obtained by the method for producing an aviation fuel oil base according to claim 1 and a second aviation fuel oil base produced from a petroleum-based feedstock, wherein a content of the first aviation fuel oil base is 5 to 50 mass % and a content of the second aviation fuel oil base is 50 to 95 mass %.