Patent ID: 9260670
Filing Date: 2016-02-16
CPC Classification: C10G

Claim Text:
1. A process for the selective hydrogenation of diolefins and sulphur compounds contained in a pyrolysis gasoline feedstock, comprising a diolefin concentration exceeding 3 wt % and an organic sulfur concentration exceeding 50 ppmw, wherein said process comprises: introducing a hydrocarbon stream that comprises said pyrolysis gasoline feedstock into a reactor that contains a single hydrotreating reaction stage comprising hydrotreating catalyst and operated at selective hydrogenation conditions, wherein said hydrocarbon stream is contacted with said hydrotreating catalyst; yielding from said reactor a reactor effluent comprising a reduced diolefin concentration of less than 10 ppmw, a reduced organic sulfur concentration of less than 3 ppmw, and an aromatics content of at least 90 wt % of a reactor inlet aromatics content; separating said reactor effluent into a portion of said reactor effluent and a remaining portion of said reactor effluent; and introducing as a recycle said portion of said reactor effluent into said reactor wherein the weight ratio of said recycle to said hydrocarbon stream is greater than 1:1.