Process for the recovery of precious metals from used and/or...

Details Process for the recovery of precious metals from used and/or... Process for the recovery of precious metals from used and/or...

C - Chemistry, Metallurgy

22

B

C22B 11/00 (2006.01) C22B 3/06 (2006.01) C22B 7/00 (2006.01)

Patent

CA 2712320

Process for recovering precious metals from catalytic carriers comprising at least the following stages : - Stage 1: treatment of the carriers with at least one aqueous and/or alcoholic composition - Stage 2: treatment of the carriers with an acid solution containing at least sulphuric acid but weak in nitric acid - Stage 3: treatment of the carriers with an acid solution containing nitric acid and hydrochloric acid.

L'invention porte sur un procédé de récupération de métaux précieux à partir de supports catalytiques. Ce procédé comprend au moins les étapes suivantes : - Étape 1 : traitement des supports à l'aide d'au moins une composition aqueuse et/ou alcoolique - Étape 2 : traitement des supports à l'aide d'une solution acide contenant au moins de l'acide sulfurique mais à faible teneur en acide nitrique - Étape 3 : traitement des supports à l'aide d'une solution acide contenant de l'acide nitrique et de l'acide chlorhydrique.

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