Patent ID: 7923594
Filing Date: 2011-04-12
Classification: C10G

Abstract:
1. An alkylation process, comprising: a. providing an isoparaffin feed that comprises at least 50 wt % C5+; b. providing a hydrocarbon stream that comprises at least 20 wt % C5+ olefins; and c. contacting the isoparaffin feed and the hydrocarbon stream with an acidic haloaluminate ionic liquid catalyst in an alkylation zone under alkylation conditions wherein a middle distillate is produced; d. adjusting over time a level of a halide containing additive provided to the alkylation zone to improve a selectivity of the acidic haloaluminate ionic liquid catalyst; wherein the middle distillate has less than 10 ppm sulfur and less than 3 wt % olefin, prior to any optional hydrofinishing; and wherein the acidic haloaluminate ionic liquid catalyst has the general formula RR′ R″ N H+ Al