TWO STAGE DEEP NAPHTHA DESULFURIZATION WITH REDUCED MERCAPTAN FORMATION

Selective and deep desulfurization of a high sulfur content mogas naphtha, with reduced product mercaptans and olefin loss, is achieved by a two stage, vapor phase hydrodesulfurization process with interstage separation of at least 80 vol. % of the H2S formed in the first stage from the first stage,...

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Main Authors MCKNIGHT, CRAIG A, GREELEY, JOHN PETER, COOK, BRUCE RANDALL, WINTER, WILLIAM EDWARD JR, HALBERT, THOMAS RISHER, BRIGNAC, GARLAND BARRY, DEMMIN, RICHARD ALAN
Format Patent
LanguageEnglish
French
Published 21.12.2010
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Summary:Selective and deep desulfurization of a high sulfur content mogas naphtha, with reduced product mercaptans and olefin loss, is achieved by a two stage, vapor phase hydrodesulfurization process with interstage separation of at least 80 vol. % of the H2S formed in the first stage from the first stage, partially desulfurized naphtha vapor effluent fed into the second stage. At least 70 wt. % of the sulfur is removed in the first stage and at least 80 wt. % of the remaining sulfur is removed in the second stage, to achieve a total at least 95 wt. % feed desulfurization, with no more than a 60 vol. % feed olefin loss. The second stage temperature and space velocity are preferably greater than in the first. The hydrodesulfurization catalyst preferably contains a low metal loading of Co and Mo metal catalytic components on an alumina support.
Bibliography:Application Number: CA20002392003