Patents by Inventor Junichi Arakawa
Junichi Arakawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 11961980Abstract: 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 theType: GrantFiled: March 29, 2018Date of Patent: April 16, 2024Assignee: JX METALS CORPORATIONInventors: Junichi Arakawa, Yasufumi Haga, Junichi Ito
-
Publication number: 20230312369Abstract: 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.Type: ApplicationFiled: April 22, 2021Publication date: October 5, 2023Applicant: JX Nippon Mining & Metals CorporationInventors: Junichi ARAKAWA, Kazunori TAJIRI
-
Publication number: 20230304130Abstract: 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.Type: ApplicationFiled: May 4, 2023Publication date: September 28, 2023Applicant: JX NIPPON MINING & METALS CORPORATIONInventors: Junichi ARAKAWA, Yasufumi HAGA, Junichi ITO
-
Patent number: 11702719Abstract: 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.Type: GrantFiled: March 28, 2018Date of Patent: July 18, 2023Assignee: JX NIPPON MINING & METALS CORPORATIONInventors: Junichi Arakawa, Yasufumi Haga, Junichi Ito
-
Publication number: 20230193422Abstract: 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.Type: ApplicationFiled: April 22, 2021Publication date: June 22, 2023Applicant: JX Nippon Mining & Metals CorporationInventors: Junichi ARAKAWA, Kazunori TAJIRI
-
Patent number: 11434545Abstract: 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.Type: GrantFiled: March 28, 2018Date of Patent: September 6, 2022Assignee: JX NIPPON MINING & METALS CORPORATIONInventor: Junichi Arakawa
-
Publication number: 20210108285Abstract: 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.Type: ApplicationFiled: March 28, 2018Publication date: April 15, 2021Applicant: JX NIPPON MINING & METALS CORPORATIONInventor: Junichi ARAKAWA
-
Publication number: 20210108286Abstract: 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.Type: ApplicationFiled: March 28, 2018Publication date: April 15, 2021Applicant: JX NIPPON MINING & METALS CORPORATIONInventors: Junichi ARAKAWA, Yasufumi HAGA, Junichi ITO
-
Patent number: 10865462Abstract: 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.Type: GrantFiled: March 15, 2017Date of Patent: December 15, 2020Assignee: JX NIPPON MINING & METALS CORPORATIONInventors: Junichi Ito, Junichi Arakawa, Takuya Yokota, Naoki Higuchi
-
Patent number: 10807879Abstract: 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.Type: GrantFiled: March 15, 2017Date of Patent: October 20, 2020Assignee: JX NIPPON MINING & METALS CORPORATIONInventors: Junichi Ito, Junichi Arakawa, Takuya Yokota, Naoki Higuchi
-
Publication number: 20200044295Abstract: 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 theType: ApplicationFiled: March 29, 2018Publication date: February 6, 2020Applicant: JX NIPPON MINING & METALS CORPORATIONInventors: Junichi ARAKAWA, Yasufumi HAGA, Junichi ITO
-
Patent number: 10443111Abstract: 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.Type: GrantFiled: March 29, 2016Date of Patent: October 15, 2019Assignee: JX NIPPON MINING & METALS CORPORATIONInventors: Junichi Arakawa, Junichi Ito, Takuya Yokota
-
Patent number: 10400304Abstract: 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.Type: GrantFiled: March 29, 2016Date of Patent: September 3, 2019Assignee: JX NIPPON MINING & METALS CORPORATIONInventors: Ken Adachi, Junichi Arakawa, Junichi Ito
-
Publication number: 20190106768Abstract: 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.Type: ApplicationFiled: March 15, 2017Publication date: April 11, 2019Applicant: JX NIPPON MINING & METALS CORPORATIONInventors: Junichi ITO, Junichi ARAKAWA, Takuya YOKOTA, Naoki HIGUCHI
-
Publication number: 20190084839Abstract: 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.Type: ApplicationFiled: March 15, 2017Publication date: March 21, 2019Applicant: JX NIPPON MINING & METALS CORPORATIONInventors: Junichi ITO, Junichi ARAKAWA, Takuya YOKOTA, Naoki HIGUCHI
-
Publication number: 20180087127Abstract: 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.Type: ApplicationFiled: March 29, 2016Publication date: March 29, 2018Applicant: JX NIPPON MINING & METALS CORPORATIONInventors: Ken ADACHI, Junichi ARAKAWA, Junichi ITO
-
Publication number: 20180073098Abstract: 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.Type: ApplicationFiled: March 29, 2016Publication date: March 15, 2018Applicant: JX NIPPON MINING & METALS CORPORATIONInventors: Junichi ARAKAWA, Junichi ITO, Takuya YOKOTA
-
Patent number: 6067101Abstract: A power source circuit having a charge circuit for charging a chargeable battery includes a charge function having a circuit for detecting a battery voltage of the battery after the passage of a predetermined period at a charge voltage rising stage since the start of charging, a device for judging the life of the battery by comparing a detected result of the detecting circuit with a reference value, and a device for stopping the charge of the battery in accordance with the judgment of a battery failure by the judging device.Type: GrantFiled: June 20, 1994Date of Patent: May 23, 2000Assignee: Canon Kabushiki KaishaInventors: Junichi Arakawa, Makoto Kashimura, Toshihiko Bekki, Hideo Horigome, Kazuyuki Masumoto
-
Patent number: 5697717Abstract: A printer has an electric power supply controller which controls electric power supplied to an indicator indicating a state of the printer so as to prolong a driving time of the printer, which is driven by a battery. When the apparatus is set to an on-line state using an on-line key, electric power is initially supplied to an on-line LED, which indicates the apparatus is in the on-line state. Afterwards, when a predetermined time period has passed, the supply of electric power is cut off to the on-line LED, whereby the consumption of electric power supplied to the indicator can be minimized.Type: GrantFiled: September 27, 1995Date of Patent: December 16, 1997Assignee: Canon Kabushiki KaishaInventors: Yuichi Kaneko, Tetsuhito Ikeda, Akira Kuribayashi, Junichi Arakawa, Hideo Horigome
-
Patent number: 5673070Abstract: A battery-driven recording apparatus records a plurality of lines by recording-scan by using a recording head having a plurality of recording elements. A capacity of a battery is detected, and when the capacity of the battery is lowered, the number of lines to be recorded in one recording scan is reduced.Type: GrantFiled: December 22, 1993Date of Patent: September 30, 1997Assignee: Canon Kabushiki KaishaInventors: Hideki Nakanishi, Junichi Arakawa, Hideo Horigome, Yuichi Kaneko, Tetsuhito Ikeda, Akira Kuribayashi