Its use in the hydrogenation of the hydrocarbon conversion processes and benzene by treatment in a distillation zone including the extraction of the stabilizing distillate to be combined in the reaction zone

摘要

PROBLEM TO BE SOLVED: To improve a hydrocarbon conversion by withdrawing a liquid distillate from a distillation column at a downstream from a position of withdrawing a vapor distillate when a hydrocarbon feedstock is treated by circulating part thereof to a hydrogenation reactor located at the outside of the distillation column thereby forming the vapor distillate at the top of the distillation column and the liquid distillate at the bottom. ;SOLUTION: When a hydrocarbon feedstock is treated by introduction from a duct 1 into a distillation column 2 thereby causing a top vapor distillate and a bottom liquid distillate to be formed, the liquid is withdrawn through a duct 15 and transferred to a hydrogenation reactor 3 wherein part of the hydrocarbon is subjected to conversion reaction, followed by re-introduction into the distillation column 2 through a duct 17 where distillation is continued. Under this condition, a liquid distillate, which is a light reformate, is withdrawn from the distillation column 2 from a duct 18, which is located at a position lower than a withdrawal level (from a duct to a duct 13) of a vapor distillate.;COPYRIGHT: (C)1999,JPO