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公开(公告)号：US12113187B2
公开(公告)日：2024-10-08
申请号：US18498037
申请日：2023-10-31
发明人： Kaihua Xu , Liangxing Jiang , Jian Yang , Kun Zhang , Chenwei Li , Yongan Chen , Yanqing Lai
摘要： The present invention provides a method for recovering valuable metals from waste lithium ion batteries. The method comprises: short-circuit discharging, dismantling, crushing, roasting, and screening on waste lithium ion batteries to obtain active electrode powders; using alkaline solution to wash the active electrode powders, then filtering to remove copper and aluminum; drying the activated electrode powder after alkaline washing treatment, mix the dried activated electrode powder with starch and concentrated sulfuric acid and stir evenly to obtain the mixed material; calcining the mixed material with controlling the atmosphere; taking out the product obtained from calcination and using deionized water to extract the leachate and leaching residue with valence metal ions, and then obtaining the leachate after filtering. The present invention can reduce the concentration of impurity ions in the leaching solution, improve the purity and comprehensive recovery rate of valuable metals, and reduce the recovery cost.
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2.发明公开公开(公告)号：US20240279773A1
公开(公告)日：2024-08-22
申请号：US18559248
申请日：2023-09-08
发明人： Peng GAO , Shuai YUAN , Jilai NING , Yuexin HAN , Yanjun LI , Yongsheng SUN , Wenbo LI
摘要： A mixed rare earth concentrate mineral and suspended mineral phase transformation-clean leaching system and a use method thereof are provided. The system comprises a Venturi dryer, a multi-stage separator, a suspension preheating decomposition furnace, a multi-state fluidization sealing valve, a mineral phase transformation machine, a ball mill, a multi-stage acid leaching tank, an alkali leaching tank and a neutralization tank. The use method comprises the steps: after preheating mixed rare earth concentrate mineral powder, placing the preheated mixed rare earth concentrate mineral powder in a suspension preheating decomposition furnace for preheating decomposition to enable the powder to be in the suspension state, after cyclone separation, enabling the powder to enter a mineral phase transformation machine for mineral phase transformation, after ball milling, performing acid washing, performing alkali decomposition on acid leached residues, performing acid leaching twice on acid liquor, and neutralizing leached products to obtain neutralization residues.
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公开(公告)号：US11961980B2
公开(公告)日：2024-04-16
申请号：US16499122
申请日：2018-03-29
发明人： Junichi Arakawa , Yasufumi Haga , Junichi Ito
IPC分类号： H01M10/54 , B09B3/00 , B09B5/00 , C01G45/02 , C01G49/02 , C22B1/02 , C22B3/00 , C22B3/06 , C22B3/44 , C22B7/00 , C22B15/00 , C22B21/00 , C22B23/00 , C22B26/12 , H01M10/0525
CPC分类号： H01M10/54 , B09B3/00 , B09B5/00 , C01G45/02 , C01G49/02 , C22B1/02 , C22B3/06 , C22B3/44 , C22B7/00 , C22B7/007 , C22B15/00 , C22B15/0086 , C22B21/00 , C22B23/00 , C22B23/0415 , C22B26/12 , H01M10/0525 , Y02P10/20 , Y02W30/84
摘要： The present invention relates to a method for treating lithium ion battery scrap containing Li, Ni, Co, Mn, Al, Cu and Fe, the method comprising carrying out a calcination step, a crushing step and a sieving step in this order, and after the steps, the method comprising: a leaching step of leaching the lithium ion battery scrap by adding it to an acidic solution to leave at least a part of Cu as a solid; a Fe/Al removal step comprising allowing a leached solution obtained in the leaching step to pass through a Fe removal process for separating and removing Fe by addition of an oxidizing agent and an Al removal process for separating and removing a part of Al by neutralization in any order; an Al/Mn extraction step of extracting and removing a residue of Al and Mn from a separated solution obtained in the Fe/Al removal step by solvent extraction; a Co recovery step of extracting and back-extracting Co from a first extracted solution obtained in the Al/Mn extraction step by solvent extraction and recovering the Co by electrolytic winning; a Ni recovery step of extracting and back-extracting, by solvent extraction, a part of Ni from a second extracted solution obtained by the solvent extraction in the Co recovery step and recovering the Ni by electrolytic winning; a Li concentration step of extracting and back-extracting, by solvent extraction, a residue of Ni and Li from a third extracted solution obtained by the solvent extraction in the Ni recovery step and repeating the operations of the extracting and the back-extracting to concentrate Li; and a Li recovery step of carbonating Li in a Li concentrated solution obtained in the Li concentration step to recover the Li as lithium carbonate.
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公开(公告)号：US11945728B2
公开(公告)日：2024-04-02
申请号：US17044727
申请日：2019-04-03
发明人： Sateesh Daggupati , Sachchit Majhi , Sukumar Mandal , Asit Kumar Das , Vipulkumar Rameshbhai Panchotia , Mehul Bharatbhai Joshi , Gopal Ravichandran , Praveen Kumar Chinthala , Swapan Kumar Ghosh , Ajit Vishwanath Sapre
摘要： A process for obtaining vanadium component in the form of vanadium oxide from gasifier slag is disclosed. The process comprises pulverizing the slag to obtain pulverized slag, which is blended with water and an alkali salt to obtain a slurry. The slurry is dried and then roasted in the presence of air to obtain a roasted slag. The roasted slag is leached to obtain a first filtrate comprising the vanadium component. The first filtrate is reacted with a magnesium salt to remove a silica component in the form of a precipitate. The silica free second filtrate is reacted with an ammonium salt to obtain ammonium metavanadate, which is further calcined to obtain the significant amount of vanadium pentoxide (V2O5).
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公开(公告)号：US20240084418A1
公开(公告)日：2024-03-14
申请号：US18272833
申请日：2021-12-14
发明人： Yu Yamashita
摘要： A method capable of inexpensively recovering valuable metals is provided. The method for recovering a valuable metal includes: a preparation step of preparing a charge containing at least lithium (Li) and a valuable metal; an oxidation and reductive melting step of subjecting the charge to an oxidation treatment and a reductive melting treatment to produce a reduced product containing a molten alloy and a slag, the molten alloy containing the valuable metal; and a slag separation step of separating the slag from the reduced product to recover the molten alloy, in which the mole ratio of lithium (Li) to aluminum (Al) (Li/Al ratio) in the slag is 0.15 or more and less than 0.40, and the mole ratio of calcium (Ca) to aluminum (Al) (Ca/Al) in the slag is 0.15 or more.
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公开(公告)号：US20240079666A1
公开(公告)日：2024-03-07
申请号：US18272336
申请日：2022-01-14
发明人： Veena SAHAJWALLA , Rumana HOSSAIN
CPC分类号： H01M10/54 , C22B1/02 , C22B5/10 , C22B23/021
摘要： The present disclosure broadly relates to a process for recovering cobalt from lithium-ion batteries using thermal techniques.
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7.发明公开公开(公告)号：US20240039068A1
公开(公告)日：2024-02-01
申请号：US18260236
申请日：2022-06-06
申请人： GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD. , HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD. , HUNAN BRUNP EV RECYCLING CO., LTD.
发明人： Bo LI , Changdong LI , Dingshan RUAN , Ruokui CHEN , Yanchao QIAO , Donglian BAO
摘要： Disclosed are a method for selectively extracting lithium from a retired battery and an application of the method. According to the method, on the basis of an ion exchange effect between a divalent manganese ion and a lithium ion, a positive electrode material and a divalent manganese salt are mixed according to a certain proportion and prepared into a slurry, and the divalent manganese salt and the positive electrode material are fully mixed by means of a ball milling process, such that a lattice structure of the positive electrode material is effectively damaged, thereby reducing activation energy of exchange of the divalent manganese ion and the lithium ion and greatly reducing reaction energy required by a subsequence lithium extraction process. A mixed material after ball milling is roasted at a lower temperature such that the bivalent manganese in the manganese salt occupies a lithium position in a layered structure, and manganese-lithium replacement is directly performed to obtain a pure lithium-containing leaching solution. The present method greatly improves the leaching rate and selectivity of lithium. The present invention uses a mode of first performing ball-mill mixing and then performing roasting, and thus has low power consumption, high safety, good leaching rate and selectivity of lithium, and wide application prospects.
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8.发明公开公开(公告)号：US20240030509A1
公开(公告)日：2024-01-25
申请号：US18265860
申请日：2021-12-30
申请人： GUANGDONG BRUNP RECYCLING TECHNOLOGY CO., LTD. , HUNAN BRUNP RECYCLING TECHNOLOGY CO., LTD. , HUNAN BRUNP VEHICLES RECYCLING CO., LTD.
发明人： Haijun YU , Yingsheng ZHONG , Yinghao XIE , Xuemei ZHANG , Changdong LI
摘要： A method for removing impurities from a waste lithium battery safely through pyrolysis. The method may include: (1) performing primary roasting on electrode fragments of a waste lithium battery, quenching, and then layered screening to obtain a current collector fragment and an electrode material; (2) mixing and grinding the electrode material and a grinding aid, soaking the mixture in an alkali liquor, filtering and taking out filter residues to obtain electrode powder, and (3) performing secondary roasting on the electrode powder to obtain a positive electrode material.
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9.发明公开公开(公告)号：US20230399721A1
公开(公告)日：2023-12-14
申请号：US18250499
申请日：2021-10-14
发明人： Koichi HIROTA , Eiichiro IWANO , Kazuaki SAKAKI
摘要： A method for collecting a heavy rare earth element from a heavy rare earth element-containing molten salt electrolysis residue and recycling the heavy rare earth element, the method includes: a step of mixing coarse particles of the molten salt electrolysis residue with a fluorinating material followed by firing, to fluorinate the coarse particles of the molten salt electrolysis residue; a step of pulverizing the coarse particles of the fluorinated molten salt electrolysis residue to obtain a powder of the molten salt electrolysis residue; and a step of mixing the powder of the molten salt electrolysis residue with R, an R-M alloy, or an R-M-B alloy (wherein R is one or more types of rare earth elements selected from the group consisting of Y, La, Ce, Nd, Pr, Sm, Gd, Dy, Tb, and Ho, M is a transition metal such as Fe or Co, and B is boron), heating and melting the mixture, separating a molten alloy from slag, and selectively extracting the heavy rare earth element into the molten alloy. Provided are a method for recycling a heavy rare earth element that is capable of efficiently recycling a heavy rare earth element that is rare in an alloy form similar to a product, and a method for recycling a rare earth magnet by using an alloy obtained by the recycling method.
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公开(公告)号：US20230279522A1
公开(公告)日：2023-09-07
申请号：US18315623
申请日：2023-05-11
发明人： Hirotaka ARIYOSHI , Isao TOMITA , Hiroshi ABE
CPC分类号： C22B26/12 , B09B3/80 , C01D15/08 , C22B1/02 , C22B3/06 , C22B3/44 , H01M10/0525 , H01M10/54 , C01P2002/72 , C01P2006/40
摘要： A method for dissolving a lithium compound according to the present invention includes bringing a lithium compound into contact with water or an acidic solution, and feeding, separately from the lithium compound, a carbonate ion to the water or the acidic solution to produce carbonic acid, and allowing the carbonic acid to react with the lithium compound to produce lithium hydrogen carbonate.
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