Method for the preparation of cation exchange membranes...

C - Chemistry – Metallurgy – 08 – J

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C08J 5/22 (2006.01) H01M 2/16 (2006.01) H01M 8/02 (2006.01) H01M 8/18 (2006.01)

Patent

CA 2232586

A method of preparing a modified cation exchange membrane in which a sulfide of silver, tungsten, molybdenum or a mixture thereof is deposited within the polymer matrix, which method comprises the steps of: i) forming within the polymer matrix of the membrane a complex of silver, tungsten, molybdenum or a mixture thereof with a water soluble compound containing an -SH group; and ii) converting the complex formed in step (i) into the insoluble sulfide of silver, tungsten, molybdenum or a mixture thereof.

Procédé de préparation d'une membrane échangeuse de cations modifiée, par dépôt d'un sulfure d'argent, de tungstène, ou de molybdène ou d'un mélange de ceux-ci dans la matrice polymère. Ce procédé comporte les étapes suivantes: i) formation, dans la matrice polymère de la membrane, d'un complexe d'argent, de tungstène, de molybdène, ou d'un mélange de ceux-ci, avec un composé soluble dans l'eau contenant un groupe -SH; et ii) conversion du complexe formé à l'étape i) en sulfure insoluble d'argent, de tungstène, de molybdène ou d'un mélange de ceux-ci.

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