Process for the recovery of sulfur from sulfur containing...

Details Process for the recovery of sulfur from sulfur containing... Process for the recovery of sulfur from sulfur containing...

B - Operations, Transporting

01

D

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

Patent

CA 2663991

The invention is directed to a process for the recovery of sulfur from sulfur containing gases with a high sulfur recovery efficiency of at least 99.8 %. According to the process of the invention a tail gas of a Claus-type installation with a sulfur recovery efficiency of at least 97 % and having a free oxygen concentration of 0.1-0.7 vol.% is hydrogenated, and subsequently H2S is removed from the resulting gas stream, e.g. by selectively oxidizing it at a temperature between the water dewpoint temperature and 280 °C, and cooling it to a temperature of 80-115 °C. The process of the invention enables total sulfur recovery efficiencies of at least 99.8 %.

Procédé de récupération de soufre à partir de gaz sulfureux selon une haute efficacité de récupération, d'au moins 99,8%.Selon le procédé, un gaz résiduaire d'installation du type Claus à efficacité de récupération de soufre d'au moins 97% et concentration d'oxygène libre comprise entre 0,1 et 0,7 %, en volume, est soumis à une hydrogénation, puis on effectue un retrait d'H2S à partir du flux gazeux résultant, par exemple en l'oxydant sélectivement à une température comprise entre le point de rosée de l'eau et 280° C, et le refroidissant à une température comprise entre 80 et 115 ° C. Le procédé décrit assure une efficacité de récupération totale de soufre d'au moins 99,8 %.

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