The issue of cutting and fractionating FCC gasoline

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I would like to ask for some advice: Before hydrodesulfurization of FCC gasoline, some processes involve cutting steps first (that is, separating the mixture into light and heavy components). What kind of distillation process takes place in the fractionation tower – is it equilibrium distillation, simple distillation, or multi-stage distillation via rectification? In our laboratory, only simple distillation can be carried out (the oil is heated at the bottom of the tower; it’s a batch reactor), while in industrial settings continuous production is used, which involves equilibrium distillation and multi-stage distillation via rectification; it’s also possible that batch reactors are used. I would like to ask those who work in refineries: what kind of distillation process actually takes place in fractionation towers in actual production?