Fuel oil base and aviation fuel composition containing same

Abstract

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.