Hydrogen sulfide conversion process

C - Chemistry – Metallurgy – 01 – B

Patent

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C01B 17/05 (2006.01) B01D 53/52 (2006.01) C01B 3/04 (2006.01) C01B 3/50 (2006.01)

Patent

CA 2187648

A process for converting hydrogen sulfide which is contained in a gaseous feed stream to elemental sulfur and hydrogen. In accordance with the process, a gaseous feed stream containing hydrogen sulfide is contacted with a polar organic solvent having a quinone and a complexing agent dissolved therein. The complexing agent must have a pKb value of less than about 13Ø Reaction of the hydrogen sulfide in the gaseous feed stream with quinone results in an increased conversion of quinone to hydroquinone at low reactor temperatures and H2S partial pressures and in increased sulfur recovery. In addition, the presence of a complexing agent increases hydrogen production selectivity in the dehydrogenation of hydroquinone to quinone and hydrogen.

Procédé de conversion d'acide sulfhydrique contenu dans un courant gazeux d'alimentation en soufre élémentaire et en hydrogène. Selon ce procédé, on met en contact un courant gazeux d'alimentation contenant de l'acide suflhydrique avec un solvant organique polaire ayant une quinone et un agent complexant dissous dans celle-ci. L'agent complexant doit avoir une valeur pK¿b? inférieure à 13,0 environ. La réaction de l'acide sulfhydrique dans le courant gazeux d'alimentation avec la quinone se traduit par une augmentation de la conversion de quinone en hydroquinone à des basses températures de réaction et des pressions partielles de H¿2?S, et par une augmentation de la récupération de soufre. En outre, la présence d'un agent complexant augmente la sélectivité de production d'hydrogène dans la déshydrogénation de l'hydroquinone en quinone et en hydrogène.

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