公开(公告)号：US20180237312A1

公开(公告)日：2018-08-23

申请号：US15753093

申请日：2016-10-20

申请人： LE SYSTEM CO., LTD.

发明人： Kanji SATO ,  Akira SAKUMA ,  Takeo KOBORI ,  Hideki FURUKAWA ,  Keiji HIRANO ,  Tatsuaki NAKANISHI

IPC分类号： C01G31/02 ,  C22B3/44 ,  C22B34/22 ,  C22B7/02 ,  H01M8/0202 ,  H01M8/18

CPC分类号： C01G31/02 ,  C01G31/00 ,  C22B3/44 ,  C22B7/02 ,  C22B34/22 ,  H01M8/02 ,  H01M8/0202 ,  H01M8/18 ,  H01M8/182 ,  Y02E60/528 ,  Y02P10/234

摘要： An object of the disclosure is to provide a method of efficiently producing a highly-pure vanadium electrolytic solution from a combustion residue that is discharged from facilities such as refineries and power plants and contains uncombusted carbon. The method of producing a vanadium electrolytic solution for redox flow cell (RFB) includes a vanadium eluate generation step of obtaining a vanadium eluate in which vanadium is dissolved. The vanadium is contained in a combustion residue obtained after combustion of a fossil fuel. The method further includes a precipitation step of mixing a sulfide precipitant into the vanadium eluate to precipitate a solid substance of precipitate in a reduction state and a wet oxidation step including a process of adding dilute sulfuric acid to the solid substance separated from the solution to generate a vanadium sulfate solution.