FUEL OIL BASE AND AVIATION FUEL COMPOSITION CONTAINING SAME
The aviation fuel oil base of the present invention is obtained by hydrotreating an oil to be treated containing an oxygen-containing hydrocarbon compound derived from an animal or vegetable oils and fat and a sulfur-containing hydrocarbon compound and then hydroisomerizing the resultant hydrotreated oil, wherein a yield of a fraction having a boiling range of 140 to 300° C. is 70 mass % or more; an isoparaffin content is 80 mass % or more; a content of isoparaffin having 2 or more branches is 17 mass % or more; an aromatic content is less than 0.1 vol %; an olefin content is less than 0.1 vol %; a sulfur content is less than 1 mass ppm; and an oxygen content is less than 0.1 mass %.
1 . An aviation fuel oil base obtained by hydrotreating an oil to be treated containing an oxygen-containing hydrocarbon compound derived from an animal or vegetable oils and fat and a sulfur-containing hydrocarbon compound and then hydroisomerizing the resultant hydrotreated oil in the presence of hydrogen, wherein
a yield of a fraction having a boiling range of 140 to 300° C. is 70% by mass or more;
an isoparaffin content is 80% by mass or more;
a content of isoparaffin having 2 or more branches is 17% by mass or more;
an aromatic content is less than 0.1 vol %;
an olefin content is less than 0.1 vol %;
a sulfur content is less than 1 mass ppm; and
an oxygen content is less than 0.1% by mass.
2 . The aviation fuel oil base according to claim 1 , wherein the oil to be treated contains a petroleum-based base.
3 . The aviation fuel oil base according to claim 1 , wherein the hydrotreatment is a step of hydrotreating the oil to be treated by using a catalyst prepared by supporting at least one metal selected from the elements of groups 6A and 8 of the periodic table on a support formed of a porous inorganic oxide composed of two or more elements selected from aluminum, silicon, zirconium, boron, titanium, and magnesium, under conditions of a hydrogen pressure of 2 to 13 MPa, a liquid hourly space velocity of 0.1 to 3.0 a hydrogen/oil ratio of 150 to 1500 NL/L, and a reaction temperature of 150 to 480° C. in the presence of hydrogen.
4 . The aviation fuel oil base according to claim 1 , wherein the hydroisomerization is a step of isomerizing a hydrotreated oil obtained by the hydrotreatment by using a catalyst prepared by supporting a metal selected from the elements of group 8 of the periodic table on a support formed of a porous inorganic oxide composed of a substance selected from aluminum, silicon, zirconium, boron, titanium, magnesium, and zeolite, under conditions of a hydrogen pressure of 1 to 5 MPa, a liquid hourly space velocity of 0.1 to 3.0 h −1 , a hydrogen/oil ratio of 250 to 1500 NL/L, and a reaction temperature of 200 to 360° C. in the presence of hydrogen.
5 . An aviation fuel composition containing an aviation fuel oil base according to claim 1 and having a sulfur content of 10 mass ppm or less and a freezing point of −47° C. or less.
6 . The aviation fuel oil composition according to claim 5 , containing at least one additive selected from an antioxidant, an antistatic, a metal deactivator, and an anti-icing agent.
7 . The aviation fuel oil composition according to claim 5 , satisfying a standard value of an aviation turbine fuel defined by JIS K2209.