Process for removing molybdenum from aqueous manganese salt solutions

US4462912A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Eberhard Preisler · Lechenich, DE
• Bernhard Hofmann · Peißenberg, DE
• Gerhard Nolte · Lechenich, DE

Key dates

• Filing date: Nov 26, 1982
• Grant date: Jul 31, 1984
• Expiry date: Nov 26, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/912
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The disclosure relates to a process for removing molybdenum 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 manganese(IV)compounds to be added at temperatures between 50.degree. and 80.degree. 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 temperatures.