Abstract: Sulfur containing compounds in FCC gasoline could be removed by alkylation with olefins and then enriched in the heavy fraction by distillation. Based on the reaction conditions obtained in laboratory research, catalytic distillation process for alkylation desulfurization of FCC gasoline was investigated by using catalytic distillation tower. Test results showed that with resin catalyst, under atmospheric pressure, bottom feeding mode, reflux mass ratio of 2.0, reaction temperature in the range of 96-117 ℃, test results of 2 016 h continuous operation showed that the sulfur content of gasoline at the top of the tower was in the range of 30－40 μg/g with an average desulfurization rate of 91.14%, the performance of the catalyst was stable.

Key words: catalytic distillation, alktylation, FCC gasoline, desulfurization