Process for the alkylation of benzene

摘要

A process for the alkylation of benzene contained in a light naphtha is disclosed wherein the process comprises the steps of: (a) feeding (1) a naphtha stream containing benzene, olefins, diolefins, acetylenes and organic sulfur compounds and (2) hydrogen to a first distillation column reactor where said organic sulfur compounds are hydrogenated to H2S which is removed as overheads along with light ends, and C5 and heavier materials are removed as bottoms, (b) feeding said bottoms containing benzene and olefins and additional hydrogen to a second distillation column reactor where said olefins, diolefins and acetylenes are hydrogenated to alkanes and the C6 and lighter material is separated as a second overheads from the C7 and heavier material which is taken as bottoms; (c) feeding said second overheads along with an olefin selected from the group consisting of ethylene and propylene to a third distillation column reactor where benzene reacts with said olefin to produce an alkylated product and said alkylated product is separated as a third bottoms from the remainder of said C5 and C6 material which is taken as overheads from said third distillation column reactor. A process for the alkylation of benzene contained in a light naphtha is disclosed wherein the process comprises the steps of: (a) feeding (1) a naphtha stream containing benzene, olefins, diolefins, acetylenes and organic sulfur compounds and (2) hydrogen to a first distillation column reactor where said organic sulfur compounds are hydrogenated to H2S which is removed as overheads along with light ends, and C5 and heavier materials are removed as bottoms, (b) feeding said bottoms containing benzene and olefins and additional hydrogen to a second distillation column reactor where said olefins, diolefins and acetylenes are hydrogenated to alkanes and the C6 and lighter material is separated as a second overheads from the C7 and heavier material which is taken as bottoms; (c) feeding said second overheads along with an olefin selected from the group consisting of ethylene and propylene to a third distillation column reactor where benzene reacts with said olefin to produce an alkylated product and said alkylated product is separated as a third bottoms from the remainder of said C5 and C6 material which is taken as overheads from said third distillation column reactor.