Bifunctional phenyl monophosphonic/sulfonic acid ion...

B - Operations – Transporting – 01 – D

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B01D 11/00 (2006.01) B01J 39/04 (2006.01) B01J 39/20 (2006.01) B01J 49/00 (2006.01) C02F 1/42 (2006.01) C08F 2/00 (2006.01) C08J 5/20 (2006.01)

Patent

CA 2336355

A cross-linked water-insoluble ion exchange resin comprised of polymerized monomers having a phenyl ring is disclosed. A contemplated resin contains: (i) polymerized phenyl ring-containing monomers having a phosphonic acid ligand linked to the phenyl ring; (ii) about 2 to about 5 millimoles per gram (mmol/g) of phosphorous as phosphonic acid ligands; and (iii) a sufficient amount of a sulfonic acid ligand such that the ratio of mmol/g of phosphonic acid to mmol/g sulfonic acid is up to 3:1. A process for removing polyvalent metal cations from aqueous solution, and a process for removing iron (III) cations from acidic copper (II) cation-containing solutions that utilize the contemplated resin or other resins are disclosed.

La présente invention concerne une résine échangeuse d'ions réticulée, insoluble dans l'eau, constituée de monomères à noyau phényle polymérisés. Une résine de l'invention contient (i) des monomères à noyau phényle polymérisés, le noyau phényle étant lié à un ligand d'acide phosphonique, (ii) ces ligands contenant environ de 2 à environ 5 millimoles par gramme (mmole/g) de phosphore, et (iii) une quantité suffisante de ligands d'acide sulfonique, telle que le rapport molaire en poids d'acide phosphonique et d'acide sulfonique soit de 3:1. L'invention concerne aussi un procédé d'élimination de cations métalliques polyvalents d'une solution aqueuse, et un procédé d'élimination de cations fer(III) d'une solution contenant des cations de cuivre (II) acide qui utilise la résine de l'invention ou d'autres résines.

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