Purification of molybdenum technical oxide

C - Chemistry – Metallurgy – 01 – G

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C01G 39/02 (2006.01)

Patent

CA 2669834

A process for converting molybdenum technical oxide into a purified molybdenum trioxide product is provided, generally comprising the steps of: combining molybdenum technical oxide with an oxidizing agent and a leaching agent in a reactor under suitable conditions to effectuate the oxidation of residual MoS2, MoO2 and other oxidizable molybdenum oxide species to MoO3, as well as the leaching of any metal oxide impurities; precipitating the MoO3 species in a suitable crystal form; filtering and drying the crystallized MoO3 product; and recovering and recycling any solubilized molybdenum.

L'invention concerne un procédé pour convertir l'oxyde de molybdène technique en un produit purifié de trioxyde de molybdène, comprenant de manière générale les étapes consistant à : combiner l'oxyde de molybdène technique avec un agent oxydant et un agent de lixiviation dans un réacteur dans des conditions appropriées pour effectuer l'oxydation de MoS2, MoO2 résiduels et d'autres espèces d'oxyde de molybdène oxydables en MoO3, ainsi que la lixiviation d'impuretés d'oxyde métallique quelconques ; précipiter les espèces MoO3 en une forme cristalline appropriée ; filtrer et sécher le produit MoO3 cristallisé ; et récupérer et recycler tout le molybdène solubilisé.

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