Recovery of noble metals from aqueous process streams in the...

Details Recovery of noble metals from aqueous process streams in the... Recovery of noble metals from aqueous process streams in the...

C - Chemistry, Metallurgy

07

F

C07F 9/38 (2006.01) B01J 39/00 (2006.01) C02F 1/42 (2006.01)

Patent

CA 2587384

This invention generally relates to processes for recovering solubilized noble metals from aqueous process streams, in particular, aqueous process streams generated in the preparation of an N-(phosphonomethyl)glycine product, for example, by noble metal-catalyzed oxidation of an N- (phosphonomethyl)iminodiacetic acid substrate. The process includes contacting the aqueous process stream with a noble metal adsorption media such as an ion exchange resin to remove solubilized noble metal from the process stream.

Procédés de récupération de métaux nobles solubilisés à partir d'écoulements aqueux, plus particulièrement d'écoulements aqueux générés dans la préparation d'un produit de N-(phosphonométhyl)glycine, par exemple par oxydation à catalyse de métal noble d'un substrat acide N-(phosphonométhyl)iminodiacétique. Le procédé consiste à mettre en contact l'écoulement aqueux avec un milieu d'absorption de métal noble, notamment une résine d'échange d'ions afin de retirer le métal noble solubilisé de l'écoulement.

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