A process for gas sweetening

C - Chemistry – Metallurgy – 01 – B

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C01B 17/04 (2006.01) B01D 53/52 (2006.01)

Patent

CA 2745890

A process for treating a gas stream comprising hydrogen sulphide, the process comprising the steps of : (i) mixing a first gas stream comprising hydrogen sulphide with a second stream comprising sulphur dioxide to produce a combined stream, whereby elemental sulphur is produced by a reaction between the hydrogen sulphide and the sulphur dioxide; (ii) removing elemental sulphur, and optionally water, from the combined stream; and (iii) oxidising at least some of the elemental sulphur to form sulphur dioxide for use in the second stream, wherein, the reaction is conducted at a temperature of from 15 to 155 °C and a pressure of at least 3 MPa.

La présente invention concerne un procédé de traitement d'un flux gazeux comportant du sulfure d'hydrogène, le procédé comprenant les étapes suivantes: (i) le mélange d'un premier flux gazeux comportant du sulfure d'hydrogène avec un second flux gazeux comportant du dioxyde de soufre pour produire un flux combiné, permettant la production de soufre élémentaire par une réaction entre le sulfure d'hydrogène et le dioxyde de soufre; (ii) l'élimination du soufre élémentaire, et éventuellement de l'eau, depuis le flux combiné; et (iii) l'oxydation d'au moins une partie du soufre élémentaire pour former du dioxyde de soufre destiné à être utilisé dans le second flux, la réaction étant effectuée à une température comprise entre 15 et 155°C et une pression égale ou supérieure à 3 MPa.

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