The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 1984
Filed:
Nov. 26, 1982
Eberhard Preisler, Erftstadt-Liblar, DE;
Bernhard Hofmann, Hurth-Knapsack, DE;
Gerhard Nolte, Erftstadt-Lechenich, DE;
Hoechst Aktiengesellschaft, , DE;
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.