Integrated process for gasoline or aromatics production

Abstract

A process for increasing the yields of hydrocarbon components to gasoline blending pools from a hydrocarbon feedstock is presented. The process includes separating a naphtha feedstock to components to a first stream that are more readily processed in a cracking unit and to components in a second stream that are more readily processed in a reforming unit. The process includes the ability to convert components from the cracking stream to the reforming stream.

1 . A process for converting a treated hydrocarbon feedstream, comprising:
 passing the treated hydrocarbon feedstream to a separation unit to generate an extract stream enriched in normal paraffins, and a raffinate stream having a reduced normal hydrocarbon content;   passing the extract stream to an extract separation system to generate an extract overhead stream comprising nC5 and nC6 compounds, an extract intermediate stream comprising nC7 to nC11 compounds, and an extract bottoms stream comprising desorbent;   passing the raffinate stream to a raffinate separation system to generate a raffinate overhead stream comprising iC5 and iC6 compounds, an intermediate raffinate stream comprising aromatics and non-normal hydrocarbons, and a raffinate bottoms stream comprising desorbent; and   passing the intermediate raffinate stream to a reforming unit to generate an aromatics stream.   
     
     
         2 . The process of  claim 1  further comprising:
 passing a hydrocarbon feedstream to a fractionation unit to generate an overhead stream comprising C4 and lighter hydrocarbons, and a bottoms stream comprising C5+ hydrocarbons; 
 hydrotreating the bottoms stream to generate the treated hydrogenated stream; 
 passing the treated hydrogenated stream to the separation unit. 
 
     
     
         3 . The process of  claim 2  further comprising passing the overhead stream to a cracking unit. 
     
     
         4 . The process of  claim 1  further comprising passing the extract intermediate stream to a cracking unit. 
     
     
         5 . The process of  claim 1  further comprising passing a portion of the extract overhead stream to an isomerization unit to generate an isomerized stream comprising C5 and C6 compounds. 
     
     
         6 . The process of  claim 5  further comprising passing the isomerized stream to the separation unit. 
     
     
         7 . The process of  claim 1  further comprising passing a portion of the extract overhead stream to a cracking unit. 
     
     
         8 . The process of  claim 7  wherein the hydrocarbon feedstream is a naphtha feedstream. 
     
     
         9 . The process of  claim 7  wherein the cracking unit is a naphtha cracking unit. 
     
     
         10 . The process of  claim 1  further comprising passing the raffinate overhead stream to a gasoline blending pool. 
     
     
         11 . The process of  claim 1  wherein the separation unit is an adsorption separation system. 
     
     
         12 . A process for converting a naphtha feedstream, comprising:
 fractionating the naphtha feedstream to generate a naphtha overhead stream comprising C4 and lighter hydrocarbons, and a naphtha bottoms stream comprising C5+ hydrocarbons;   hydrotreating the naphtha bottoms stream to generate a hydrotreated stream having a reduced acetylene, diolefins, sulfur and nitrogen content;   passing the hydrogenated stream to a separation unit to generate an extract stream enriched in normal hydrocarbons and a raffinate stream;   passing the extract stream to a extraction separation system to generate an extract overhead stream comprising nC5 and nC6 compounds, an extract intermediate stream comprising nC7 to nC11 compounds, and an extract bottoms stream comprising desorbent;   passing the raffinate stream to a raffinate separation system to generate a raffinate overhead comprising iC5 and iC6 compounds, an intermediate raffinate stream comprising aromatics and non-normal hydrocarbons, and a raffinate stream comprising desorbent;   passing the intermediate extract stream and the naphtha overhead stream to a naphtha cracking unit to generate light olefins; and   passing the intermediate raffinate stream to a reforming unit to generate an aromatics stream.   
     
     
         13 . The process of  claim 12  further comprising passing a portion of the extract overhead stream to an isomerization unit to generate an isomerized stream comprising C5 and C6 compounds. 
     
     
         14 . The process of  claim 13  further comprising passing the isomerized stream to the separation unit. 
     
     
         15 . The process of  claim 12  further comprising passing a portion of the extract overhead stream to the naphtha cracking unit. 
     
     
         16 . The process of  claim 12  further comprising passing the raffinate overhead stream to a gasoline blending pool. 
     
     
         17 . The process of  claim 12  further comprising passing the extract bottoms stream to the separation unit. 
     
     
         18 . The process of  claim 12  wherein the separation unit is an adsorption separation system. 
     
     
         19 . The process of  claim 12  further comprising passing the raffinate bottoms stream to the separation unit. 
     
     
         20 . The process of  claim 12  wherein the naphtha cracking unit is a steam cracking unit.