JP7588863B2 - 廃リチウムイオン電池からリチウムを回収する方法 - Google Patents
廃リチウムイオン電池からリチウムを回収する方法 Download PDFInfo
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Description
従来、前記廃リチウムイオン電池から前記有価金属を回収する際には、該廃リチウムイオン電池を加熱処理(焙焼)、粉砕、分級する等して得られた前記有価金属を含む粉末(以下、活物質粉という)からコバルト、ニッケル、マンガン、リチウムを湿式プロセスにて分離精製することが行われている(例えば、特許文献1、2参照)。
尚、本願において、廃リチウムイオン電池とは、電池製品としての寿命が消尽した使用済みのリチウムイオン電池、製造工程で不良品等として廃棄されたリチウムイオン電池、製造工程において製品化に用いられた残余の正極・負極材料等を意味する。
本発明は、かかる不都合を解消して、高い回収率でリチウムを回収することができ、資源循環が可能である廃リチウムイオン電池から有価金属を回収する方法を提供することを目的とする。
図1に示すように、本実施形態の廃リチウムイオン電池から有価金属を回収する方法(以下、回収方法と略記する)は、活物質粉1を出発物質とする。
Claims (7)
- 廃リチウムイオン電池からリチウムを回収する方法であって、
該廃リチウムイオン電池を前処理して得られた活物質粉を鉱酸中に溶解して溶解液を得る溶解工程と、
該溶解液を水酸化リチウムで中和して生成する不溶解物と溶液Aに固液分離する固液分離する中和及び固液分離工程と、
該溶液Aに有機リン化合物抽出溶媒を添加してマンガンを抽出分離すると共に溶液Bを得るマンガン抽出工程と、
該溶液Bにヒドロオキシム抽出溶媒を添加してニッケルを抽出分離すると共に溶液Cを得るニッケル抽出工程と、
該溶液Cに有機リン化合物抽出溶媒を添加してコバルトを抽出分離すると共に第1のリチウム塩水溶液を得るコバルト抽出工程と、
該第1のリチウム塩水溶液を、イオン交換膜を用いて電解して水酸化リチウム水溶液と、酸と、該第1のリチウム塩水溶液よりも希薄な第2のリチウム塩水溶液とを得る膜電解工程と、
該水酸化リチウム水溶液の一部を該溶解液、マンガン抽出工程、ニッケル抽出工程、及びコバルト抽出工程の少なくとも1つに添加する水酸化リチウムとして用い、該酸を該鉱酸として用いる工程を含む、廃リチウムイオン電池から有価金属を回収する方法。 - 請求項1に記載された廃リチウムイオン電池から有価金属を回収する方法において、前記第2のリチウム塩水溶液を濃縮し、前記第1のリチウム塩水溶液に添加することを特徴とする廃リチウムイオン電池から有価金属を回収する方法。
- 請求項1又は2に記載された廃リチウムイオン電池から有価金属を回収する方法において、前記鉱酸は、塩酸、硫酸、及び硝酸からなる群から選択される少なくとも1種であること特徴とする廃リチウムイオン電池から有価金属を回収する方法。
- 請求項1又は2に記載された廃リチウムイオン電池から有価金属を回収する方法において、前記鉱酸は塩酸であることを特徴とする廃リチウムイオン電池から有価金属を回収する方法。
- 請求項1又は2に記載された廃リチウムイオン電池から有価金属を回収する方法において、イオン交換膜を用いて前記第1のリチウム塩水溶液を電解して得られた塩素と水素とを反応させて生成した塩酸を前記鉱酸として用いることを特徴とする廃リチウムイオン電池から有価金属を回収する方法。
- 請求項1又は2に記載された廃リチウムイオン電池から有価金属を回収する方法において、前記膜電解工程に用いる電力は、再生可能エネルギーによって得られた電力であること特徴とする廃リチウムイオン電池から有価金属を回収する方法。
- 請求項6に記載された廃リチウムイオン電池から有価金属を回収する方法において、前記再生可能エネルギーによって得られた電力は、太陽光発電によって得られた電力又は風力発電によって得られた電力であること特徴とする廃リチウムイオン電池から有価金属を回収する方法。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US18/840,705 US20250167328A1 (en) | 2021-09-30 | 2023-04-07 | Method for recovering lithium from waste lithium ion batteries |
| PCT/JP2023/014342 WO2023195533A1 (ja) | 2021-09-30 | 2023-04-07 | 廃リチウムイオン電池からリチウムを回収する方法 |
| KR1020247027228A KR20240137028A (ko) | 2021-09-30 | 2023-04-07 | 폐 리튬이온전지로부터 리튬을 회수하는 방법 |
| CA3244502A CA3244502A1 (en) | 2021-09-30 | 2023-04-07 | METHOD FOR RECOVERING LITHIUM FROM USED LITHIUM-ION BATTERIES |
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| CN120810052B (zh) * | 2025-09-12 | 2025-11-21 | 浙江沃乐科技股份有限公司 | 一种废旧锂电电解液全回收的装置和方法 |
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