Process for removing molybdenum from aqueous manganese salt...

Details Process for removing molybdenum from aqueous manganese salt... Process for removing molybdenum from aqueous manganese salt...

C - Chemistry, Metallurgy

22

B

53/173

C22B 47/00 (2006.01) C01G 39/00 (2006.01) C01G 45/00 (2006.01) C22B 34/34 (2006.01)

Patent

CA 1197690

PROCESS FOR REMOVING MOLYBDENUM FROM AQUEOUS MANGANESE SALT SOLUTIONS ABSTRACT OF THE DISCLOSURE The disclosure relates to a process for removing molyb- denum from aqueous manganese(II)salt solutions by adsorbing the molybdenum on manganese dioxide and separating adsorbend and adsorbate from the purified manganese(II)salt solution. To this end, the disclosure provides for a pH value lower than 5 to be established in the manganese salt solution; for an oxidant capable of oxidizing manganese(II)compounds to manga- nese(IV)compounds to be added at temperatures between 50 and 80°C, so as to effect oxidation of a small proportion of dissolved manganese(II)salt to manganese dioxide; for resulting precipitate to be allowed to remain in contact over a period of at least 15 minutes with the manganese(II)salt solution, and for the precipitate to be separated from said solution at said tem- peratures.

417895

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