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公开(公告)号：US20210108286A1
公开(公告)日：2021-04-15
申请号：US16499173
申请日：2018-03-28
发明人： Junichi ARAKAWA , Yasufumi HAGA , Junichi ITO
摘要： A method for recovering lithium from lithium ion battery scrap according to this invention comprises subjecting lithium ion battery scrap to a calcination step, a crushing step, and a sieving step sequentially carried out, wherein the method comprises, between the calcination step and the crushing step, between the crushing step and the sieving step, or after the sieving step, a lithium dissolution step of bringing the lithium ion battery scrap into contact with water and dissolving lithium contained in the lithium ion battery scrap in the water to obtain a lithium-dissolved solution; a lithium concentration step of solvent-extracting lithium ions contained in the lithium-dissolved solution and stripping them to concentrate the lithium ions to obtain a lithium concentrate; and a carbonation step of carbonating the lithium ions in the lithium concentrate to obtain lithium carbonate.
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公开(公告)号：US20230304130A1
公开(公告)日：2023-09-28
申请号：US18312311
申请日：2023-05-04
发明人： Junichi ARAKAWA , Yasufumi HAGA , Junichi ITO
CPC分类号： C22B26/12 , B02C23/20 , C22B1/02 , C22B7/007 , C22B23/0453 , H01M10/0525 , H01M10/54 , B09B3/80 , B02C2201/06
摘要： A method for recovering lithium from lithium ion battery scrap according to this invention comprises subjecting lithium ion battery scrap to a calcination step, a crushing step, and a sieving step sequentially carried out, wherein the method comprises, between the calcination step and the crushing step, between the crushing step and the sieving step, or after the sieving step, a lithium dissolution step of bringing the lithium ion battery scrap into contact with water and dissolving lithium contained in the lithium ion battery scrap in the water to obtain a lithium-dissolved solution; a lithium concentration step of solvent-extracting lithium ions contained in the lithium-dissolved solution and stripping them to concentrate the lithium ions to obtain a lithium concentrate; and a carbonation step of carbonating the lithium ions in the lithium concentrate to obtain lithium carbonate.
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公开(公告)号：US20190084839A1
公开(公告)日：2019-03-21
申请号：US16085337
申请日：2017-03-15
发明人： Junichi ITO , Junichi ARAKAWA , Takuya YOKOTA , Naoki HIGUCHI
摘要： A method for processing lithium ion battery scrap according to this invention includes a leaching step of leaching lithium ion battery scrap to obtain a leached solution; an aluminum removal step of neutralizing the leached solution to a pH range of from 4.0 to 6.0, then performing solid-liquid separation and removing aluminum in the leached solution to obtain a first separated solution; and an iron removal step of adding an oxidizing agent to the first separated solution and adjusting the pH in a range of from 3.0 to 5.0, then performing solid-liquid separation and removing iron in the first separated solution to obtain a second separated solution.
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4.发明申请公开(公告)号：US20180087127A1
公开(公告)日：2018-03-29
申请号：US15563205
申请日：2016-03-29
发明人： Ken ADACHI , Junichi ARAKAWA , Junichi ITO
CPC分类号： C22B3/08 , B09B3/00 , B09B5/00 , C22B3/06 , C22B7/00 , C22B23/00 , C22B26/12 , C25C1/08 , H01M10/0525 , Y02P10/234 , Y02P10/236 , Y02W30/84
摘要： The present invention provides a method for removing copper from lithium ion battery scrap containing copper, comprising a leaching step of adding the lithium ion battery scrap to an acidic solution and leaching the lithium ion battery scrap under a condition that an aluminum solid is present in the acidic solution; and a copper separating step of separating copper contained in the acidic solution as a solid from the acidic solution, after the leaching step.
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公开(公告)号：US20230312369A1
公开(公告)日：2023-10-05
申请号：US17918307
申请日：2021-04-22
发明人： Junichi ARAKAWA , Kazunori TAJIRI
CPC分类号： C01G53/40 , H01M10/54 , B01D11/0492 , C01P2002/50
摘要： A method for producing mixed metal salts containing manganese ions and at least one of cobalt ions and nickel ions, the method including: an Al removal step of subjecting an acidic solution containing at least manganese ions and aluminum ions, and at least one of cobalt ions and nickel ions, to removal of the aluminum ions by extracting the aluminum ions into a solvent, the acidic solution being obtained by subjecting battery powder of lithium ion batteries to a leaching step; and a precipitation step of neutralizing an extracted residual liquid obtained in the Al removal step under conditions where a pH is less than 10.0, to precipitate mixed metal salts comprising a metal salt of manganese and a metal salt of at least one of cobalt and nickel.
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公开(公告)号：US20230193422A1
公开(公告)日：2023-06-22
申请号：US17917520
申请日：2021-04-22
发明人： Junichi ARAKAWA , Kazunori TAJIRI
IPC分类号： C22B3/00 , C01F7/00 , C01G45/00 , C01G45/02 , C01G51/00 , C01G51/04 , C01G53/00 , C01G53/04 , C22B3/04 , C22B21/00 , C22B47/00 , C22B3/32 , H01M10/54
CPC分类号： C22B23/0415 , C01F7/00 , C01G45/003 , C01G45/02 , C01G51/003 , C01G51/04 , C01G53/003 , C01G53/04 , C22B3/04 , C22B21/0023 , C22B47/00 , C22B3/32 , H01M10/54 , C01P2006/40
摘要： A method for producing a mixed metal solution containing manganese ions and at least one of cobalt ions and nickel ions, the method including: an Al removal step of subjecting an acidic solution containing at least manganese ions and aluminum ions, and at least one of cobalt ions and nickel ions, to removal of the aluminum ions by extracting the aluminum ions into a solvent while leaving at least a part of the manganese ions in the acidic solution in an aqueous phase, the acidic solution being obtained by subjecting battery powder of lithium ion batteries to a leaching step; and a metal extraction step of bringing an extracted residual liquid obtained in the Al removal step to an equilibrium pH of 6.5 to 7.5 using a solvent containing a carboxylic acid-based extracting agent, extracting at least one of the manganese ions and at least one of the cobalt ions and the nickel ions into the solvent, and then back-extracting the manganese ions and at least one of the cobalt ions and nickel ions.
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公开(公告)号：US20210108285A1
公开(公告)日：2021-04-15
申请号：US16499170
申请日：2018-03-28
发明人： Junichi ARAKAWA
摘要： A method for recovering lithium according to this invention comprises separating sodium from a lithium-containing solution containing lithium ions and sodium ions to recover lithium, wherein the method comprises a solvent extraction step including: at least three-stage extraction process having a first extraction process, a second extraction process, and a third extraction process; and a lithium back extraction stage of back extracting the lithium ions from a solvent that have undergone the at least three-stage extraction process; and wherein, in the extraction process, the solvent undergoes the first extraction process, the second extraction process, and the third extraction process in this order, and a solution as the lithium-containing solution undergoes the respective processes in opposite order to the order of the solvent.
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公开(公告)号：US20200044295A1
公开(公告)日：2020-02-06
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 , C22B3/44 , C22B3/06 , C22B7/00 , C22B23/00 , C22B15/00 , C22B21/00 , C22B26/12 , H01M10/0525
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：US20190106768A1
公开(公告)日：2019-04-11
申请号：US16085242
申请日：2017-03-15
发明人： Junichi ITO , Junichi ARAKAWA , Takuya YOKOTA , Naoki HIGUCHI
摘要： A method for processing lithium ion battery scrap includes a leaching step of leaching lithium ion battery scrap and subjecting the resulting leached solution to solid-liquid separation to obtain a first separated solution; an iron removal step of adding an oxidizing agent to the first separated solution and adjusting a pH of the first separated solution in a range of from 3.0 to 4.0, then performing solid-liquid separation and removing iron in the first separated solution to obtain a second separated solution; and an aluminum removal step of neutralizing the second separated solution to a pH range of from 4.0 to 6.0, then performing solid-liquid separation and removing aluminum in the second separated solution to obtain a third separated solution.
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10.发明申请公开(公告)号：US20180073098A1
公开(公告)日：2018-03-15
申请号：US15563478
申请日：2016-03-29
发明人： Junichi ARAKAWA , Junichi ITO , Takuya YOKOTA
CPC分类号： C22B3/08 , C01G45/02 , C01G49/02 , C22B3/44 , C22B7/00 , C22B7/007 , C22B23/00 , C22B47/00 , H01M10/54 , Y02P10/234 , Y02W30/84
摘要： The present invention provides a method for removing iron from an iron-containing solution containing an iron ion, comprising adding a lithium ion battery cathode material containing manganese to an acidic sulfuric acid solution to obtain a cathode material-containing solution, and then precipitating a manganese ion as manganese dioxide in a mixed solution obtained by mixing the iron-containing solution with the cathode material-containing solution while precipitating the iron ion contained in the iron-containing solution as a solid.
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