Patent ID: 6913688

Claim:
A process for hydrodesulfurizing olefinic naphtha feedstreams and retaining a substantial amount of the olefins, which feedstream boils in the range of about 50° F. (10° C.) to about 450° F. (232° C.) and contains substantial amounts of organically bound sulfur and olefins, which process comprises: a) hydrodesulfurizing the feedstream in a first sulfur removal stage in the presence of a hydrogen and a hydrodesulfurization catalyst, at hydrodesulfurization reaction conditions including temperatures from about 232° C. (450° F.) to about 427° C. (800° F.), pressures of about 60 to 800 psig, and hydrogen treat gas rates of about 1000 to 6000 standard cubic feet per barrel, to convert at least about 50 wt. % of the organically bound sulfur to hydrogen sulfide and to produce a first product stream containing from about 100 to about 1,000 wppm organically bound sulfur; b) fractionating said product stream into a light fraction and a heavy fraction, wherein the fractionation cut point is at a temperature such that the light fraction contains less about 100 wppm of organically bound sulfur and some hydrogen sulfide and the heavy fraction contains the remainder of the organically bound sulfur; c) stripping the light fraction of at least a portion of its hydrogen sulfide; d) conducting the stripped light fraction away from the process; e) conducting the heavy fraction to a second sulfur removal stage wherein at least a portion of the remaining organically bound sulfur is removed.