Bifunctional crown ether-based cation-exchange stationary...

B - Operations – Transporting – 01 – D

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Details

B01D 15/08 (2006.01) B01D 15/36 (2006.01) B01J 39/26 (2006.01) B01J 45/00 (2006.01)

Patent

CA 2283262

In accordance with the present invention, an improved bifunctional cation- exchange composition has been formed which comprises synthetic resin support particles and both crown ether and non-crown ether functional groups attached thereto. The compositions of the present invention provide for novel, enhanced cation separation capabilitites, and depending upon the type of functional groups emplyed, permit effective separation of cations which elute at approximately the same time off standard and commonly used cation-exchange columns. The presently described bifunctional cation-exchange compositions also permit the effective separation of one cation from a mixture comprising another cation that is present at a significantly greater concentration. Formed articles and methods employing the bifunctional cation-exchange composition are also provided.

On a formé une compositions bifonctionelle d'échange de cations améliorée qui contient des particules de support de résine synthétique et des groupes fonctionnels éther couronne et éther non couronne qui sont attachés aux particules de support. Les compositions de cette invention se caractérisent par des capacités de séparation cationique nouvelles et améliorées et, suivant le type de groupes foncitonnels employés, elles permettent de séparer efficacement des cations qui s'éluent approximativement au même moment que dans les colonnes échangeuses de cations classiques qu'on utilise communément. Les compositions bifonctionnelles d'échange de cations de cette invention permettent également de séparer efficacement un cation présent dans un mélange contenant un autre cation qui est lui-même présent à une concentration significativement supérieure. On décrit également des articles formés avec cette composition et des procédés dans lesquels on utilise cette composition bifonctionnelle d'échange de cations.

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