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公开(公告)号：US10693171B2
公开(公告)日：2020-06-23
申请号：US16074080
申请日：2017-01-16
申请人： INSTITUTE OF PROCESS ENGINEERING, CHINESE ACADEMY OF SCIENCES , BEIJING ZHONGKAIHONGDE TECHNOLOGY CO., LTD
发明人： Qingshan Zhu , Haitao Yang , Chuanlin Fan , Wenheng Mu , Jibin Liu , Cunhu Wang , Qixun Ban
摘要： A system and method for preparing a high-purity vanadium electrolyte, comprising preparing a low-valence vanadium oxide with vanadium oxytrichloride by ammonium salt precipitation and fluidization reduction, and preparing the high-purity vanadium electrolyte at a low temperature by adding a sulfuric acid solution and clean water under the conditions of ultrasound-assisted dissolution and activation. Efficient utilization of heat is achieved through heat exchange between the ammonium salt and the reduction tail gas and heat exchange between the reduction product and fluidized nitrogen gas. Ammonia gas in the reduction tail gas is recovered for precipitation of vanadium to achieve the recycling of ammonia gas. An internal member is arranged in the reduction fluidized bed to realize the precise regulation of the valence state of the reduction product. Furthermore, ultrasound-assisted dissolution and activation are employed to prepare the vanadium electrolyte at a low temperature, thereby improving the activity of the electrolyte.
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公开(公告)号：US10707515B2
公开(公告)日：2020-07-07
申请号：US16073908
申请日：2017-01-16
申请人： INSTITUTE OF PROCESS ENGINEERING, CHINESE ACADEMY OF SCIENCES , BEIJING ZHONGKAIHONGDE TECHNOLOGY CO., LTD
发明人： Haitao Yang , Qingshan Zhu , Chuanlin Fan , Qixun Ban
摘要： A system and method for producing a high-purity and high-activity vanadium electrolyte, comprising converting high-purity vanadium oxytrichloride into an ammonium salt in a fluidized bed by gas phase ammoniation, then in another fluidized bed, reducing the ammonium salt into a low-valence vanadium oxide having an average vanadium valence of 3.5, adding clean water and sulfuric acid for dissolution, and further performing activation by ultrasound to obtain a 3.5-valence vanadium electrolyte which can be directly used in a new all-vanadium redox flow battery stack. The method of producing an ammonium salt containing vanadium in the fluidized bed by gas phase ammoniation is of short process and high efficiency. Precise regulation of the valence state of the reduction product is implemented by arranging an internal member in the reduction fluidized bed, and ultrasonication is used to activate the vanadium ion, thereby greatly improving the activity of the electrolyte.
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公开(公告)号：US10673088B2
公开(公告)日：2020-06-02
申请号：US16074075
申请日：2017-01-16
申请人： INSTITUTE OF PROCESS ENGINEERING, CHINESE ACADEMY OF SCIENCES , BEIJING ZHONGKAIHONGDE TECHNOLOGY CO., LTD
发明人： Chuanlin Fan , Qingshan Zhu , Haitao Yang , Wenheng Mu , Jibin Liu , Cunhu Wang , Qixun Ban
摘要： A system and method for producing a 3.5-valence high-purity vanadium electrolyte, comprising hydrolyzing high-purity vanadium oxytrichloride into vanadium pentoxide in a fluidized bed, and reducing vanadium pentoxide into a low-valence vanadium oxide having an average vanadium valence of 3.5 adding water and a sulfuric acid solution under a microwave field applied externally for dissolution at a low temperature, to obtain a 3.5-valence high-purity vanadium electrolyte. The preparation of vanadium pentoxide by means of gas-phase hydrolysis in the fluidized bed is of short process and high efficiency. By providing an internal member within the reduction fluidized bed, the precise regulation of the valence state of the reduction product is achieved, and the special chemical effect of the microwave field is used to promote dissolution of the vanadium oxide and activate the vanadium ions, thereby greatly improving the activity of the electrolyte.
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公开(公告)号：US10125024B2
公开(公告)日：2018-11-13
申请号：US15547068
申请日：2016-01-28
申请人： INSTITUTE OF PROCESS ENGINEERING,CHINESE ACADEMY OF SCIENCES , BEIJING ZHONGKAIHONGDE TECHNOLOGY CO., LTD
发明人： Qingshan Zhu , Haitao Yang , Chuanlin Fan , Wenheng Mu , Jibin Liu , Cunhu Wang , Qixun Ban
IPC分类号： C01G31/00 , C01G31/02 , B01D3/14 , B01F15/02 , B01J6/00 , B01J8/26 , B01L5/04 , C01B21/06 , C01G31/04
摘要： The present invention provides a system and method for purifying and preparing vanadium pentoxide powder. Industrial grade vanadium pentoxide is converted to vanadium oxytrichloride by low temperature fluidizing chlorination, wherein chlorinating gas is preheated via heat exchange between fluidizing gas and chlorination flue gas, and an appropriate amount of air is added to enable a part of carbon powder to combust so as to achieve a balanced heat supply during the chlorination, thereby increasing the efficiency of chlorination and ensuring good selectivity in low temperature chlorination. The vanadium oxytrichloride is purified by rectification, and then subjected to fluidized gas phase ammonification, thereby obtaining ammonium metavanadate, and further obtaining a high-purity vanadium pentoxide powder product through fluidized calcination. The system and method have advantages of favorable adaptability to raw material, no discharge of contaminated wastewater, low energy consumption and chlorine consumption in production, stable product quality etc.
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