| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a catalytically cracked gasoline base having a reduced sulfur content and a process for producing the same, and to provide an unleaded gasoline composition that ensures satisfactory operating characteristics using the catalytically cracked gasoline base. Ž<P>SOLUTION: The process for producing the catalytically cracked gasoline base comprises subjecting a stock oil having a specific sulfur content, a specific nitrogen content and a specific metal content to catalytic cracking and then subjecting the catalytically cracked oil to fractional distillation to produce a catalytically cracked gasoline base comprising a catalytically cracked naphtha having a 5 vol.% distillation temperature of 35-55°C, a 95 vol.% distillation temperature of 150-210°C, a total sulfur content of ≤25 mass ppm and a proportion of thiophenes as a sulfur compound in the total sulfur content being ≥20 mass% in terms of the sulfur content. The unleaded gasoline composition having an extremely low sulfur content (a sulfur content of ≤10 mass ppm) is produced by compounding 30-90 vol.% of the catalytically cracked gasoline base and 70-10 vol.% of the other gasoline base. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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