Patent ID: 7919664

Claim:
A process for producing a jet fuel, comprising: a. reacting an isobutane stream with a process stream containing butene under alkylation conditions wherein the isobutane and butene are alkylated to produce an alkylate product in the presence of a chloroaluminate ionic liquid catalyst having the general formula RR′R″NH + Al 2 Cl 7 − , wherein RR′ and R″ are alkyl groups containing 1 to 12 carbons; wherein the reacting step additionally includes adjusting over time a level of a halide containing additive provided to an ionic liquid reactor where the reacting occurs; wherein the adjusting over time of the level of the halide containing additive improves a selectivity of the chloroaluminate ionic liquid catalyst to provide increased yield of the jet fuel; and b. separating out the jet fuel from the alkylate product, wherein the jet fuel meets the boiling point, flash point, smoke point, heat of combustion, and freeze point requirements for Jet A-1 fuel.