Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vb metal
Patent
1995-11-06
1996-12-24
Valentine, Donald R.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group vb metal
423 68, 252512, 252 622, 252500, C01G 3100, H01B 100
Patent
active
055871321
ABSTRACT:
A method for producing an electrolytic solution containing vanadium as positive and negative electrode active material, the electrolytic solutions being suitable for a redox battery which comprises: the steps of (1) a vanadium compound is dissolved in a solvent under an alkaline or neutral condition, a polyvanadate compound is precipitated and isolated by thermal polymerization of vanadium ions under an acidic condition; (2) a part of the polyvanadate compound is baked in an inert or oxidizing gas atmosphere so as to remove ammonium ions; (3) a trivalent vanadium compound is formed by treating another part of the polyvanadate compound under a reductive atmosphere; (4) a trivalent vanadium electrolytic solution is formed by dissolving the trivalent vanadium compound in an acid solution; and (5) vanadium pentoxide and a part of the trivalent vanadium compound are reacted by mixing so that mixed electrolytic solutions of V.sup.4+ and V.sup.3+ are formed. According to the present invention, a high purity vanadium electrolytic solution can be economically produced even from vanadium pentoxide and ammonium metavanadate raw materials containing large quantities of impurities.
REFERENCES:
patent: 4645651 (1987-02-01), H ahn et al.
patent: 4786567 (1988-11-01), Skyllas-Kazacos et al.
patent: 4814150 (1989-03-01), Corigliano et al.
patent: 5250158 (1993-10-01), Kaneko et al.
patent: 5318865 (1994-06-01), Kaneko et al.
patent: 5368762 (1994-11-01), Sato et al.
Patent Abstracts of Japan, vol. 18, No. 102 (E-1511), Feb. 18, 1994, and Derwent Abstracts, AN-92-292723 [36], JP-A-05-303973, Nov. 16, 1993.
Akahoshi Toshiaki
Nakajima Masato
Nomura Yutaka
Sato Kanji
Sawahata Masatoshi
Kashima-Kita Electric Power Corporation
Valentine Donald R.
LandOfFree
Method for producing high purity vanadium electrolytic solution does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing high purity vanadium electrolytic solution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing high purity vanadium electrolytic solution will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1176954