| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a gasoline composition having low exhaust gas (NOx) performance and a low incidence of depositing on the combustion chamber without any change in the octane value or distillation characteristics. <P>SOLUTION: The method for manufacturing a gasoline composition in which the research octane number is at least 96 and less than 105, is characterized in that 1 to 40 vol% of a pyrolysis-modified gasoline base material having the properties (1) through (7), 25 to 50 vol% of a light catalytically cracked gasoline base material, 25 to 90 vol% of a catalytically cracked gasoline base material containing a light catalytically cracked gasoline base material, and 0.1 to 10 vol% of a C4 hydrocarbon base material are compounded at a minimum. (1) The aromatic fraction is 90 vol% or higher; (2) the olefin fraction is 5 vol% or lower; (3) the C8 aromatic fraction is 5 to 50 vol%; (4) the aromatic fraction having 9 or more carbon atoms is 30 vol% or less; (5) the sulfur content is 20 mass ppm or less; (6) the research octane number is 110 or higher; and (7) the density at 15°C is 0.8 to 0.95 g/cm<SP POS="POST">3</SP>. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
