Method for producing aviation fuel oil base and aviation fuel oil composition

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;
• and
• then 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.