| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing a gasoline base material which has a sulfur content of≤10 ppm by mass and can be used as a base material for sulfur-free gasoline by subjecting catalytically cracked gasoline to hydrodesulfurization while suppressing the reduction in the octane value to the extent causing no trouble in practical use; and to provide gasoline containing the gasoline base material obtained by the same. SOLUTION: The method for producing the gasoline base material includes: a first process for subjecting catalytically cracked gasoline to hydrodesulfurization so that the hydrogenation ratio of olefins contained in the catalytically cracked gasoline becomes≤25 mol%, the content of total sulfur becomes≤20 ppm by mass, the content of sulfur originating in thiophenes and benzothiophenes becomes≤5 ppm by mass, and the content of sulfur originating in thiacyclopentanes becomes≤0.1 ppm by mass, based on the mass of product oil; and a second process for further subjecting the product oil in the first process to hydrodesulfurization so that the total of the hydrogenation ratios of olefins in the first process and this process becomes≤30 mol%, the content of total sulfur becomes≤10 ppm by mass, and the content of sulfur originating in thiols becomes≤5 ppm by mass, based on the mass of product oil. COPYRIGHT: (C)2009,JPO&INPIT
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