Method for manufacturing an aviation fuel oil composition

Abstract

To provide an aviation fuel oil composition which has excellent life cycle characteristics and achieves excellent specific fuel consumption. The aviation fuel oil composition according to the present invention includes: a first base which is a fraction having a boiling range of 140 to 280° C. obtained through a step of hydrotreating a first feedstock containing a sulfur-containing hydrocarbon compound and an oxygen-containing hydrocarbon compound derived from an animal or vegetable oil and fat or a second feedstock which is an oil blend of the first feedstock and a petroleum-based base obtained by refining a crude oil; and a second base which is a fraction having a boiling range of 140 to 280° C. obtained from a heavy oil cracking apparatus.

1 . A method for manufacturing an aviation fuel oil composition comprising:
 obtaining a first base oil, which is a fraction having a boiling range of 140 to 280° C., by hydrotreating a first raw oil feedstock containing a sulfur-containing hydrocarbon compound and an oxygen-containing hydrocarbon compound derived from an animal or vegetable oil and fat or a second feedstock which is an oil blend of the first feedstock and a petroleum-based base obtained by refining a crude oil,   wherein the hydrotreating is performed in the presence of hydrogen under conditions of a hydrogen pressure of 2 to 13 MPa, a liquid hourly space velocity of 0.1 to 3.0 h −1 , a hydrogen/oil ratio of 150 to 1500 NL/L, and a reaction temperature of 150° to 480° C. by using a catalyst prepared by supporting one or more metals selected from 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, and further wherein a recycled oil is incorporated into the feedstock during the hydrotreating and the content of the recycled oil is 0.5- to 5-fold by mass based on the oxygen-containing hydrocarbon compound derived from an animal or vegetable oil and fat;   further isomerizing a hydrogenated oil, obtained by the hydrotreating of the first or second feedstock, in the presence of hydrogen under the conditions of a hydrogen pressure of 2 to 13 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 150 to 380° C. by using a catalyst prepared by supporting a metal selected from 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;   obtaining a second base oil, which is a fraction having a boiling range of 140 to 280° C. and has a density at 15° C. of 800 kg/m 3  or more and 840 kg/m 3  or less, by cracking a heavy oil in a heavy oil cracking apparatus; and   mixing the first base oil with the second base oil to obtain an aviation fuel oil composition.   
     
     
         2 - 4 . (canceled) 
     
     
         5 . The method for manufacturing an aviation fuel oil composition according to  claim 1 , further comprising obtaining a third base oil which comprises an aviation fuel oil base obtained by refining a crude oil, a synthetic aviation fuel oil base, or a mixture thereof; and
 further adding the third base oil into the aviation fuel oil composition.   
     
     
         6 . The method for manufacturing an aviation fuel oil composition according to  claim 1 , further comprising adding one or more additives selected from an antioxidant, an antistatic, a metal deactivator, and an anti-icing agent into the aviation fuel oil composition. 
     
     
         7 . The method for manufacturing an aviation fuel oil composition according to  claim 1 , wherein the aviation fuel oil composition satisfies standard values of JIS K2209 “Aviation Turbine Fuels”.