Patent ID: 8623104
Filing Date: 2014-01-07
Classification: C10L

Abstract:
1. A method of producing a gas oil composition comprising steps of: preparing a gas oil composition (C) comprising an FT synthetic base oil in an amount of 60 percent by volume or more on the basis of the total amount of the gas oil composition (C); (Step 1) adding to the gas oil composition (C) by line-blending, forced-stirring or leaving to stand a lubricity improver comprising a fatty acid and/or a fatty acid ester in an amount of 20 mg/L or more and 300 mg/L or less in terms of the active component on the basis of the total amount of the gas oil composition (C), subsequently (Step 2) adding to the gas oil composition (C) by line-blending, forced-stirring or leaving to stand a cold flow improver comprising an ethylene vinyl acetate copolymer and/or a compound with a surface active effect in an amount of 20 mg/L or more and 1000 mg/L or less in terms of the active component on the basis of the total amount of the gas oil composition (C); and adding to the gas oil composition (C) by line-blending, forced-stirring or leaving to stand a detergent which is at least one compound selected from the group consisting of a polyether amine compound, a polybutenyl amine compound, and an alkenyl succinimide compound, wherein the detergent is added in an amount of 20 mg/L or more and 500 mg/L or less on the basis of the total amount of the gas oil composition (C); wherein the gas oil composition has a sulfur content of 5 ppm by mass or less, an aromatic content of 1 percent by volume or less, an oxygen content of 100 ppm or less, a density at 15° C. of 760 kg/m