초록 ▼

A process for the production of cyclohexane by the hydrogenation of benzene is provided wherein the reactor is operated at a pressure wherein the reaction mixture is boiling under low hydrogen partial pressure in the range of about 0.1 psia to less than 200 psia at 0 to 350 psig overhead pressure. T

A process for the production of cyclohexane by the hydrogenation of benzene is provided wherein the reactor is operated at a pressure wherein the reaction mixture is boiling under low hydrogen partial pressure in the range of about 0.1 psia to less than 200 psia at 0 to 350 psig overhead pressure. The catalyst is provided as a catalytic distillation structure such that the reaction is concurrently occurring with a distillation. The benzene is fed at a point above the bed and the hydrogen is fed below the bed. All of the overheads may be returned as reflux to provide cooling within the catalyst bed.

대표청구항 ▼

[ The invention claimed is:] [1.] In a process for the production of cyclohexane by the hydrogenation of benzene comprising the steps of:(a) feeding a first stream comprising benzene to a distillation column reactor containing a bed of hydrogenation catalyst;(b) feeding a second stream comprising hy

[ The invention claimed is:] [1.] In a process for the production of cyclohexane by the hydrogenation of benzene comprising the steps of:(a) feeding a first stream comprising benzene to a distillation column reactor containing a bed of hydrogenation catalyst;(b) feeding a second stream comprising hydrogen to said distillation column reactor at a point below said bed;(c) contacting the benzene and hydrogen at a hydrogen partial pressure of from 0.1 to 200 psia, in the presence of a hydrogenation catalyst thereby reacting a portion of the benzene with a portion of the hydrogen to form a reaction mixture containing cyclohexane and, unreacted hydrogen and unreacted benzene;(d) maintaining the pressure in the distillation column reactor such that a portion of the reaction mixture is boiling;(e) removing gaseous overheads, components from the reaction mixture and hydrogen from the distillation column reactor;(f) condensing a portion of the overheads from the distillation column reactor; and(g) returning a portion of the condensed overheads to the distillation column reactor as reflux,wherein the improvement comprises feeding said first stream at a point above said bed of hydrogenation catalyst.