We provide alkylation process units, one comprising: a) a hydrogenation reactor that produces a regenerated catalyst effluent; b) a fractionation unit that separates the effluent into gas and light hydrocarbon; c) a connection between the fractionation unit for transmitting the gas to the hydrogenation reactor; and d) a connection between the fractionation unit and an alkylation reactor to transmit the light hydrocarbon to the alkylation reactor. The other comprising: a) a separator, connected between the hydrogenation reactor and a fractionation unit; that separates the effluent into gas and liquid; and wherein the fractionation unit separates a hydrocarbon stream from the liquid into a light hydrocarbon comprising a hydrogen chloride and an extracted conjunct polymer naphtha; b) a connection between the separator and the hydrogenation reactor for transmitting the gas to the hydrogenation reactor; and c) a connection between the fractionation unit and an alkylation reactor to transmit the light hydrocarbon.