PROCESS FOR PRODUCING GASOLINE BASE AND GASOLINE

摘要

A process comprising: a first step in which catalytically cracked gasoline is hydrodesulfurized so that olefins contained in the catalytically cracked gasoline come to have a degree of hydrogenation of 25 mol% or lower and the catalytically cracked gasoline comes to have a total sulfur content not higher than 20 mass ppm of the product oil to be yielded, a content of sulfur derived from thiophene compounds and benzothiophene compounds not higher than 5 mass ppm of the product oil, and a content of sulfur derived from thiacyclopentane compounds not higher than 0.1 mass ppm of the product oil; and a second step in which the product oil obtained in the first step is further hydrodesulfurized so that the sum of the degree of olefin hydrogenation in the first step and the degree of olefin hydrogenation in this step is 30 mol% or less and the product oil comes to have a total sulfur content not higher than 10 mass ppm of the product oil and a content of sulfur derived from thiol compounds not higher than 5 mass ppm of the product oil.