Exxonmobil Research and Engineering Company

Brij N Gupta

Thomas R Halbert

Garland B Brignac

John P Greeley

Robert Charles Welch

John G Matragrano

William E Winter

John C Coker

Chu Siang Loo

A process for the selective hydrodesulfurization of naphtha streams containing sulfur and olefins. A substantially olefins-free naphtha stream is blended with an olefins/sulfur-containing naphtha stream and hydrodesulfurized resulting in the substantial removal of sulfur without excessive olefin saturation.

Selective hydrodesulfurization of naphtha streams

A process for the selective hydrodesulfurization of olefinic naphtha streams containing a substantial amount of organically bound sulfur and olefins. The olefinic naphtha stream is selectively hydrodesulfurized in a first sulfur removal stage and resulting product stream, which contains hydrogen sulfide and organosulfur is fractionated at a temperature to produce a light fraction containing less than about 100 wppm organically bound sulfur and a heavy fraction containing greater than about 100 wppm organically bound sulfur. The light fraction is stripped of at least a portion ofits hydrogen sulfide and can be collected or passed to gasoline blending. The heavy fraction is passed to a second sulfur removal stage wherein at least a portion of any remaining organically bound sulfur is removed.

Multi-stage hydrodesulfurization of cracked naphtha streams with interstage fractionation

Growing community of inventors

Thornhill, Canada

Brij N Gupta