Patent ID: 7439410
Filing Date: 2008-10-21
Classification: C07C

Abstract:
1. An alkylation process comprising: a) producing an alkylate and forming a first C b) separating by distillation in a first distillation zone the alkylate from isobutane and the first C c) recycling at least a portion of the isobutane separated in step b) to step a), wherein steps a), b), and c) define a flow cycle loop; d) at least intermittently withdrawing a purge comprising the first C e) producing isobutane and forming a second C f) separating by distillation in a second distillation zone isobutane from the first C3-minus paraffin and the second C g) passing at least a portion of the isobutane separated in step f) to at least one point in the flow cycle loop; wherein the C