Apparatus and process for treating an aqueous solution...

B - Operations – Transporting – 01 – D

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B01D 15/08 (2006.01) B01D 15/38 (2006.01) C02F 1/42 (2006.01)

Patent

CA 2703819

Apparatus, process and article for treating an aqueous solution containing a chemical contaminant. The process includes contacting an aqueous solution containing a chemical contaminant with an aggregate composition comprising an insoluble rare earth-containing compound to form a solution depleted of chemical contaminants. 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 a cerium carbonate, cerium oxalate and/or a cerium salt. The aggregate composition can include more than 10.01% by weight of the insoluble rare earth-containing compound, and in a particular embodiment consists essentially of one or more cerium oxides, and optionally a binder and/or flow aid. Although intended for a variety of fluid treatment applications, such applications specifically include removing or detoxifying chemical contaminants in water.

L'invention porte sur un appareil, un procédé et un article pour le traitement d'une solution aqueuse contenant un contaminant chimique. Le procédé comprend la mise en contact d'une solution aqueuse contenant un contaminant chimique avec une composition d'agrégat comprenant un composé insoluble à teneur en terre rare afin de former une solution appauvrie en contaminants chimiques. Le composé insoluble à teneur en terre rare peut comprendre un ou plusieurs éléments parmi le cérium, le lanthane ou le praséodyme. Un composé insoluble à teneur en cérium approprié peut être issu d'un carbonate de cérium, d'un oxalate de cérium et/ou d'un sel de cérium. La composition d'agrégat peut comprendre plus de 10,01 % en poids du composé insoluble à teneur en terre rare et, dans un mode de réalisation particulier, consiste essentiellement en un ou plusieurs oxydes de cérium, et facultativement un liant et/ou un adjuvant d'écoulement. Bien que l'invention soit destinée à une diversité d'applications de traitement de fluides, de telles applications comprennent de façon spécifique l'élimination ou la détoxification de contaminants chimiques dans l'eau.

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