System for extracting soluble heavy metals from liquid...

B - Operations – Transporting – 01 – J

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B01J 39/08 (2006.01) B01D 15/36 (2006.01) B01J 20/26 (2006.01) B01J 20/32 (2006.01) B01J 45/00 (2006.01) C02F 1/28 (2006.01) C02F 1/42 (2006.01) C22B 3/42 (2006.01)

Patent

CA 2306964

A process for removing ions of dissolved heavy metals and complex heavy metals comprises providing a treatment zone in which is contained an extraction material having an activated surface that has an affinity for heavy metal ions and complex heavy metal ions. The activated surface is the reaction product of a polyamine with a covalently anchored trifunctional hydrocarbylsilyl that yields non-crosslinked amino groups to which functional chelator groups can be covalently attached. The activated surface of the extraction material is formed by first hydrating the extraction material surface and then silanizing the hydrated surface with a short chain trifunctional silane having a hydrocarbon substituent containing 1-6 carbon atoms and a terminal leaving group, and then reacting a polyamine with the hydrocarbylsilyl from the silanization of the hydrated surface so as to form an aminohydrocarbyl polymer covalently bound to the extraction material surface.

Procédé permettant d'éliminer les ions de métaux lourds et de métaux lourds complexes dissous, selon lequel une zone de traitement contient une matière d'extraction qui possède une surface activée ayant une affinité pour les ions de métaux lourds et les ions de métaux lourds complexes. Ladite surface activée est le produit de réaction d'une polyamine avec un hydrocarbylsilyle trifonctionnel ancré de manière covalente qui produit des groupes amino non réticulés auxquels peuvent être attachés de manière covalente des groupes chélateurs fonctionnels. La surface activée de la matière d'extraction est formée d'abord par hydratation de la surface de la matière d'extraction, puis par silanisation de la surface hydratée à l'aide d'un silane trifonctionnel à chaîne courte ayant un substituant hydrocarbure contenant 1 à 6 atomes de carbone et un groupe terminal labile, et enfin par mise en réaction d'une polyamine avec l'hydrocarbylsilyle provenant de la silanisation de la surface hydratée de façon à former un polymère aminohydrocarbyle lié de manière covalente à la surface de la matière d'extraction.

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