Vanadium recovery method, method for producing electrolytic solution for redox flow batteries, vanadium recovery device, and device for producing electrolytic solution for redox flow batteries

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United States of America Patent

PATENT NO 10844458
APP PUB NO 20180209014A1
SERIAL NO

15743838

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Abstract

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The present invention is characterized by comprising: an acid leaching step for obtaining a leach liquid by causing leaching of, by means of an acid, a metal mixture at least containing vanadium and at least one type of a divalent or trivalent metal selected from nickel, cobalt, manganese, palladium, platinum, copper, and zinc; a complex generation step for adding an ammoniacal alkaline aqueous solution to the leach liquid for adjusting the pH to 10-12 and generating, in the alkaline aqueous solution, an ammine complex of a divalent or trivalent metal ion and an anion complex of a tetravalent and/or pentavalent vanadium ion; a divalent or trivalent metal recovery step for adding a carrier having a carboxyl group to the alkaline aqueous solution in which the ammine complex and the anion complex are generated, causing the divalent or trivalent metal ion in the ammine complex to be selectively adsorbed onto the carrier, and recovering the divalent or trivalent metal ion; and a vanadium recovery step for recovering vanadium from the anion complex contained in the alkaline aqueous solution after the divalent or trivalent metal ion is recovered.

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Patent Owner(s)

  • NATIONAL UNIVERSITY CORPORATION GUNMA UNIVERSITY; NIHON KANKI INDUSTRY CO., LTD.; SUMITOMO ELECTRIC INDUSTRIES, LTD.; KAWASAKI JUKOGYO KABUSHIKI KAISHA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kannari, Naokatsu Maebashi, JP 4 18
Nishide, Tsutomu Tokyo, JP 18 310
Takarada, Takayuki Maebashi, JP 3 47

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