John D Coker

US Patent:

6913688, Jul 5, 2005

Filed:

Oct 18, 2002

Appl. No.:

10/274021

Inventors:

John C. Coker - Baytown TX, US
Garland B. Brignac - Clinton LA, US
Thomas R. Halbert - Baton Rouge LA, US
John G. Matragrano - Baton Rouge LA, US
Brij Gupta - Thornhill, CA
Robert C. Welch - Baton Rouge LA, US

Assignee:

ExxonMobil Research and Engineering Company - Annandale NJ

International Classification:

C10G065/00

US Classification:

208210, 208209, 208213, 208216 R, 208 59, 208217

Abstract:

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.