Patent ID: 8586812

Claim:
A process for increasing distillate yield, comprising: a) separating a product from a Fischer-Tropsch unit into: i) a first hydrocarbon stream comprising C2-C8 olefins; and ii) a second hydrocarbon stream comprising a C9+ Fischer-Tropsch condensate; b) contacting the first hydrocarbon stream comprising C 2 -C 8 olefins with an ionic liquid catalyst and an alkyl halide co-catalyst in a hydrocarbon conversion zone under oligomerization conditions to oligomerize the olefins and to provide a first distillate enriched stream including one or more halogenated components; and c) removing the one or more halogenated components from the first distillate enriched stream to provide a dechlorinated distillate enriched stream; d) providing at least one of the second hydrocarbon stream comprising the C9+ Fischer-Tropsch condensate and a third hydrocarbon stream comprising C19+ paraffins; and e) contacting at least one of the second hydrocarbon stream and the third hydrocarbon stream with a hydroprocessing catalyst in a hydroprocessing zone under hydroprocessing conditions to provide a second distillate enriched stream; wherein the hydroprocessing zone includes a hydrocracking zone.