C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
C22B 34/34 (2006.01) C01G 39/00 (2006.01) C01G 39/06 (2006.01) C22B 3/34 (2006.01) C22B 3/44 (2006.01) C22B 34/22 (2006.01)
Patent
CA 2448027
Process for selectively removing molybdenum from liquid mixtures containing it, in a quantity greater than (200) mg/l, together with vanadium characterized in that it comprises the following steps: bringing the liquid mixture to a pH of less than (3); adding a solution of an alkaline xanthate to the solution so that the molar ratio molybdenum/alkaline xanthate ranges from (1/4) to (1/8), maintaining the pH constant by means of the addition of an inorganic acid; stirring the mixture causing the precipitation of the molybdenum present in the mixture.
L'invention concerne un procédé permettant d'extraire, de manière sélective, le molybdène contenu dans des mélanges liquides, dans une quantité supérieure à 200 mg/l, ainsi que le vanadium. Ce procédé se caractérise en ce qu'il consiste à amener ce mélange liquide à un pH inférieur à 3, à ajouter une solution d'un xanthate alcalin à la présente solution, de sorte que le rapport molaire molybdène/xanthate alcalin soit compris entre (1/4) et (1/8), tout en maintenant le pH constant par l'ajout d'un acide inorganique, puis à agiter ce mélange jusqu'à la précipitation du molybdène présent dans ce dernier.
Panariti Nicoletta
Sentimenti Emilio
Eni S.p.a.
Enitecnologie S.p.a.
Robic
Snamprogetti S.p.a.
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