Pressure oxidation process for the production of molybdenum...

C - Chemistry – Metallurgy – 01 – G

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C01G 39/02 (2006.01) C01G 39/00 (2006.01)

Patent

CA 2202352

Molybdenum trioxide is produced from molybdenite by a pressure oxidation process comprising of the steps of forming an aqueous slurry of molybdenite, pressure oxidizing the slurry to form soluble and insoluble molybdenum species, converting the insoluble molybdenum species to soluble molybdenum species by alkaline digestion, separating the soluble molybdenum species from insoluble residue contaminants (if present), removing the molybdenum species from the aqueous media through solvent extraction, and recovering the molybdenum values as molybdenum trioxide from the organic solvent. Low grade molybdenite concentrates, including concentrator slimes containing talc and sericite, can be used as a feed. The process produces technical grade molybdenum trioxide.

Procédé de fabrication de trioxyde de molybdène à partir de molybdénite par oxydation sous pression consistant à former une boue épaisse aqueuse de molybdénite, à oxyder ladite boue pour former des produits à base de molybdène solubles et insolubles, à convertir les produits insolubles en solubles par digestion alcaline, à séparer les produits solubles des résidus contaminants (si présents), à extraire les produits à base de molybdène du milieu aqueux par extraction par solvant, et à récupérer les produits molybdéniques sous forme de trioxyde de molybdène dans le solvant organique. Les concentrés à faible teneur en molybdène, y compris les boues de concentrateur contenant du talc et de la séricite peuvent servir d'alimentation. Le procédé donne un trioxyde de molybdène de qualité industrielle.

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