Aggregate composition for treating a contaminanted fluid

B - Operations – Transporting – 01 – J

Patent

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Details

B01J 20/02 (2006.01) B01J 20/30 (2006.01) C02F 1/28 (2006.01) C02F 1/52 (2006.01)

Patent

CA 2703821

An aggregate composition and process for making the aggregate composition. The aggregate composition includes an insoluble rare earth-containing compound and a polymer binder. The insoluble rare earth-containing compound can include one or more of cerium, lanthanum, or praseodymium. A suitable insoluble cerium- containing compound can be derived from cerium carbonate or a cerium salt. In a specific embodiment, the aggregate composition consists essentially of one or more cerium oxides, the polymer binder and optionally a flow aid. A process for making the composition includes mixing the insoluble rare earth-containing compound with a polymer binder to form a mixture, and subjecting the mixture to mechanical, chemical and/or thermal treatment to adhere the rare earth compound to the polymer binder. The aggregate composition can be used in a variety of fluid treatment applications to remove one or more chemical and biological contaminants in a fluid.

L'invention concerne une composition agrégée et un procédé de fabrication de ladite composition. La composition agrégée contient un composé insoluble comprenant des terres rares, et un liant polymérique. Le composé insoluble comprenant des terres rares peut contenir un ou plusieurs éléments parmi le cérium, le lanthanum ou le praséodymium. Un composé insoluble adapté contenant du cérium peut être dérivé d'un carbonate de cérium ou d'un sel de cérium. Dans un mode de réalisation spécifique, la composition agrégée contient essentiellement un ou plusieurs oxydes de cérium, un liant polymérique et, éventuellement, un adjuvant d'écoulement. Le procédé de fabrication de la composition consiste à mélanger le composé insoluble comprenant des terres rares avec un liant polymérique pour former un mélange, et à soumettre le mélange à un traitement mécanique, chimique et/ou thermique pour faire adhérer le composé à terres rares au liant polymérique. La composition agrégée peut être utilisée dans diverses applications de traitement fluidique destinées à éliminer un ou plusieurs polluants chimiques et biologiques d'un fluide.

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