A process for the recovery of sulphur from a hydrogen...

Details A process for the recovery of sulphur from a hydrogen... A process for the recovery of sulphur from a hydrogen...

B - Operations, Transporting

01

D

B01D 53/86 (2006.01) C01B 17/04 (2006.01)

Patent

CA 2341479

The invention is directed to a process for the recovery of sulphur from a hydrogen sulphide containing gas, which process comprises: i) oxidising part of the hydrogen sulphide in a gaseous stream with oxygen or an oxygen containing gas in an oxidation stage to sulphur dioxide; ii) reacting the product gas of this oxidation stage in at least two catalytic stages, in accordance with the Claus equation: 2 H2S + SO2 ==> 2 H2O + 3/n Sn iii) catalytically reducing SO2 in the gas leaving the last of said at least two catalytic stages, wherein the catalytic reduction takes place in a catalyst bed downstream from the last Claus catalytic stage.

L'invention concerne un procédé de récupération de soufre à partir d'un gaz contenant de l'hydrogène sulfuré, ce procédé comprenant les étapes suivantes consistant: i) à oxyder une partie de l'hydrogène sulfuré dans un courant gazeux, au moyen d'oxygène ou d'un gaz contenant de l'oxygène, dans une étape d'oxydation servant à produire du dioxyde de soufre; ii) à faire réagir le gaz produit dans cette étape d'oxydation, dans au moins deux étapes catalytiques, en fonction de l'équation de Claus: 2 H¿2?S + SO¿2? ==> 2 H¿2?O + 3/n S¿n?; iii) à réduire de manière catalytique SO¿2? dans le gaz quittant la dernière de ces deux étapes au moins, la réduction catalytique s'effectuant dans un lit de catalyse situé en aval de la dernière étape catalytique de Claus.

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