Additive-containing anionic clays for reducing sox emissions...

Details Additive-containing anionic clays for reducing sox emissions... Additive-containing anionic clays for reducing sox emissions...

C - Chemistry, Metallurgy

01

F

C01F 7/00 (2006.01) B01J 23/00 (2006.01) C10G 11/04 (2006.01)

Patent

CA 2679477

A process is disclosed for the preparation of an additive-containing anionic clay generally comprising the steps of: a) milling a physical mixture of a divalent metal compound and a trivalent metal compound, b) calcining the milled physical mixture at a temperature in the range of about 200 to about 8000C, and c) rehydrating the calcined mixture in aqueous suspension to form the additive-containing anionic clay, wherein an additive is optionally present in the physical mixture of step (a) and present in the aqueous suspension of step (c), and the additive is essentially free of vanadium.

Cette invention concerne un procédé permettant de préparer une argile anionique contenant un additif, lequel procédé comprend les étapes qui consistent a) broyer un mélange physique constitué d'un composé métallique divalent et d'un composé métallique trivalent, b) à calciner le mélange physique broyé à une température comprise entre environ 200 et 800°C, et c) à réhydrater le mélange calciné dans une suspension aqueuse afin de former une argile anionique contenant un additif, un additif étant éventuellement contenu dans le mélange physique cité à l'étape (a) et dans la suspension aqueuse citée à l'étape (c), lequel additif est essentiellement exempt de vanadium.

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