Maximizing aromatics production from hydrocracked naphtha

摘要

A gasoline blending components production system useful for producing both aromatics and gasoline blending components from naphtha. The production system includes a light hydrocracked naphtha splitter, a medium hydrocracked naphtha splitter, a naphtha hydrotreater, an isomerization unit, a continuous catalytic reformer and aromatics complex. The production system is operable to produce both refined benzene and para-xylene products in addition to medium hydrocracked naphtha, isomerate, a C7s cut and a C9+ cut, which are useful for gasoline blending without additional treatment. A method for producing gasoline blending components while maximizing aromatic production includes introducing both stabilized hydrocracked naphtha to the light hydrocracked naphtha splitter and straight run naphtha to the naphtha hydrotreater. Operating the production system produces three types of hydrocracked naphtha: a light hydrocracked naphtha, a medium hydrocracked naphtha and a heavy hydrocracked naphtha. Light and heavy hydrocracked naphtha are directed to the naphtha hydrotreater.

主权项

1. A method for producing gasoline blending components while maximizing aromatic production using naphtha, the method comprising the steps of:
introducing stabilized hydrocracked naphtha to a light hydrocracked naphtha splitter of a gasoline blending components production system; introducing straight run naphtha to a naphtha hydrotreater (NHT) of the gasoline blending components production system; operating the gasoline blending components production system such that the light hydrocracked naphtha splitter forms both a light hydrocracked naphtha and a light hydrocracked naphtha splitter bottoms from the stabilized hydrocracked naphtha, the light hydrocracked naphtha passes into the NHT and the light hydrocracked naphtha splitter bottoms passes into a medium hydrocracked naphtha splitter, the medium hydrocracked naphtha splitter forms both a medium hydrocracked naphtha and a heavy hydrocracked naphtha from the light hydrocracked naphtha splitter bottoms, where the medium hydrocracked naphtha product is useful for gasoline blending without additional treatment, the heavy hydrocracked naphtha passes into the NHT, and an isomerate, a benzene product, a para-xylene product, a C7s cut and a C9+ cut form from the introduced straight run naphtha, the light hydrocracked naphtha and the heavy hydrocracked naphtha, where the isomerate, the C7s cut, and the C9+ cut are useful for gasoline blending without additional treatment, where the gasoline blending components production system includes: the light hydrocracked naphtha splitter that is operable to produce a light hydrocracked naphtha and a light hydrocracked naphtha splitter bottoms from the received stabilized hydrocracked naphtha; the medium hydrocracked naphtha splitter that couples to the light hydrocracked naphtha splitter and that is operable to produce a medium hydrocracked naphtha product and a heavy hydrocracked naphtha from the received light hydrocracked naphtha splitter bottoms; the naphtha hydrotreater (NHT) that couples to both the light hydrocracked naphtha splitter and the medium hydrocracked naphtha splitter and that is operable to hydrotreat a naphtha feed for producing and separating a sweetened light hydrotreated naphtha and a sweetened heavy hydrotreated naphtha from the received straight run naphtha, the light hydrocracked naphtha and the heavy hydrocracked naphtha; an isomerization unit that couples to both the NHT and an aromatics complex operable to produce a refined benzene product, a refined para-xylene product, a C7s cut product, a C9+ cut product and a raffinate and that is operable to produce an isomerate from the received sweetened light hydrotreated naphtha and the raffinate; a continuous catalytic reformer (CCR) that couples to the NHT and that is operable to produce a reformate from the received sweetened heavy hydrotreated naphtha using one or more processes selected from naphthene dehydrogenation, naphthene hydrodecyclization, paraffin isomerization, demethylation and hydrocracking from the received sweetened heavy hydrotreated naphtha; and the aromatics complex that couples to the CCR.