Hydrofluoric Acid (HF) Alkylation Units, often referred to as HF Alky units, are process units used in petroleum refining to convert isobutane and alkenes (primarily propylene or butylene) into alkylate, which is used to make gasoline. Before being transferred to the alkylation unit, the alkenes are generated in a fluidized catalytic cracking unit (FCCU). Once in the alkylation unit, the alkenes react to the isobutane while in the presence of a catalyst, causing the two subst

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