Methods and compositions for desulfurization of hydrocarbon...

C - Chemistry – Metallurgy – 10 – G

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C10G 25/00 (2006.01) B01J 20/08 (2006.01) B01J 20/34 (2006.01) C10G 25/03 (2006.01) C10G 25/05 (2006.01) C10G 29/04 (2006.01) C10G 29/16 (2006.01)

Patent

CA 2525824

Sulfur is removed from a hydrocarbon fuel via contact with a desulfurization agent in the absence of added hydrogen; the desulftuization agent is then regenerated (wherein sulfur is released) by exposing it to oxygen. The sulfur removal and regeneration processes each can be carried out at relatively moderate temperatures, e.g., from 300 to 600~C, and pressure, e.g., about 0.79 to about 3.5 MPa; and the desulfurization agent can include a transition metal oxide, such as molybdenum oxide. The process can also include the additional steps of cracking the hydrocarbon, separating high-boiling and low-boiling fractions from the reaction product and contacting the lower-boiling fraction with a secondary desulfurization agent.

Selon l'invention, le soufre est éliminé d'un combustible hydrocarboné par contact avec un agent de désulfuration. L'agent de désulfuration est ensuite régénéré (et le soufre libéré) par exposition de l'agent à l'oxygène. Les processus d'élimination du soufre et de régénération peuvent être effectués, chacun pour ce qui le concerne, à des températures et une pression relativement modérés, par exemple des températures comprises entre 300 et 6000 ·C et une pression d'environ 0,79 à 3,5 MPa; et l'agent de désulfuration peut comprendre un oxyde d'un métal de transition, tel que l'oxyde de molybdène. Ces processus peuvent également comprendre des étapes supplémentaires de craquage de l'hydrocarbure, de séparation des fractions à haut point d'ébullition et à bas point d'ébullition du produit de la réaction, et de placement de la fraction à point d'ébullition inférieur au contact d'un second agent de désulfuration.

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