Sulfur oxide removing additives and methods for partial...

B - Operations – Transporting – 01 – D

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B01D 53/86 (2006.01) C10G 25/00 (2006.01) C10L 3/10 (2006.01)

Patent

CA 2667995

The sulfur oxide removing additive suitable for a FCC unit at low oxygen environment condition is described. The SOx removing additive includes one or more sorbents and one or more oxidation catalysts. The sorbent includes a source of Al and a divalent component. The divalent component is selected from a group consisting of magnesium, calcium, and combinations of two or more. The oxidation catalyst includes a source of cerium. The SOx removing additive is substantially free of vanadium. Also described is a method of removing the sulfur oxide content of a sulfur oxide-containing gas from an FCC unit. The method includes contacting the gas with a SOx removing additive at a low oxygen environment condition.

La présente invention concerne un additif d'élimination d'oxyde de soufre approprié pour une unité de craquage catalytique fluide (CCF) dans des conditions d'environnement à faible teneur en oxygène. L'additif d'élimination de SOx comprend un ou plusieurs sorbants et un ou plusieurs catalyseurs d'oxydation. Le sorbant comprend une source d'Al et un composant divalent. Le composant divalent est choisi dans le groupe constitué par le magnésium, le calcium et des combinaisons de deux ou plus. Le catalyseur d'oxydation comprend une source de cérium. L'additif d'élimination de SOx est sensiblement dépourvu de vanadium. La présente invention concerne également un procédé d'élimination de la teneur en oxyde de soufre d'un gaz contenant de l'oxyde de soufre dans une unité de CCF. Le procédé comprend la mise en contact du gaz avec un additif d'élimination de SOx dans des conditions d'environnement à faible teneur en oxygène.

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