C - Chemistry – Metallurgy – 01 – D
Patent
C - Chemistry, Metallurgy
01
D
23/168, 182/2, 2
C01D 3/16 (2006.01) B01D 15/04 (2006.01) B01J 45/00 (2006.01)
Patent
CA 2029115
A method for removing sulfate ions from an aqueous solution of an alkali metal chloride is disclosed, in which the aqueous solution of the alkali metal chloride containing sulfate ions and zirconium hydrous oxide are brought into contact with each other in a slurry form under acidic conditions to thereby cause the sulfate ions to be adsorbed to the zirconium hydrous oxide by an ion exchange reaction, the zirconium hydrous oxide adsorbing sulfate ions is separated from the aqueous solution and then dispersed in another aqueous liquid to thereby cause it to react with an alkali so as to cause sulfate ions to be desorbed into the aqueous liquid. According to this method, adsorption and desorption take place rapidly and efficiently.
Méthode d'élimination des ions sulfate d'une solution aqueuse d'un chlorure de métal alcalin prévoyant un contact, dans une bouillie et en conditions acides, entre la solution et un oxyde de zirconium hydraté; les ions sulfate sont adsorbés par l'oxyde, par échange ionique, celui-ci est séparé de la solution aqueuse et dispersé dans un autre liquide aqueux pour l'amener à réagir avec un métal alcalin de manière à provoquer la désorption du sulfate qui passe dans ce liquide. Avec cette méthode, l'adsorption et la désorption se produisent rapidement et de manière efficace.
Kano Toshiji
Kishi Takamichi
Shiga Minoru
Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
Marks & Clerk
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