Method for removing sulphur compounds from a residual gas...

C - Chemistry – Metallurgy – 01 – B

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

Patent

CA 2135907

A residual gas is processed by hydrogenation and hydrolysis (1) to combine the sulphur compounds into a single compound H2S, cooling (4, 10) to a temperature within a range THETA -180 DEG C, where THETA is the dew point of the water in the gaseous effluent from the hydrogenation and hydrolysis step, and selective catalytic oxidation (2a) of the H2S into sulphur at a temperature within the range THETA -180 DEG C, wherein a sulphur deposit is formed on the catalyst and the sulphur-loaded catalyst is periodically regenerated (2b), followed by cooling of the regenerated catalyst within the range THETA -180 DEG C to enable reuse in the catalytic oxidation step.

Le gaz résiduaire est soumis à un traitement comportant une phase d'hydrogénation et d'hydrolyse (1) pour amener les composés soufrés sous l'unique forme d'H2S, un refroidissement (4, 10) à une température dans l'intervalle .theta. à 180°C, .theta. étant le point de rosée de l'eau de l'effluent gazeux issu de la phase d'hydrogénation et d'hydrolyse, et d'hydrolyse, et une oxydation catalytique (2a) de l'H2S en soufre à des températures dans l'intervalle .theta. à 180°C conduisant à un dépôt du soufre formé sur le catalyseur et régénération périodique du catalyseur chargé de soufre (2b), puis refroidissement du catalyseur régénéré dans l'intervalle .theta. à 180°C pour une réutilisation dans la phase d'oxydation catalytique.

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