WO2023231508A1 - 废锂离子电池电解液高效回收的方法 - Google Patents
废锂离子电池电解液高效回收的方法 Download PDFInfo
- Publication number
- WO2023231508A1 WO2023231508A1 PCT/CN2023/081684 CN2023081684W WO2023231508A1 WO 2023231508 A1 WO2023231508 A1 WO 2023231508A1 CN 2023081684 W CN2023081684 W CN 2023081684W WO 2023231508 A1 WO2023231508 A1 WO 2023231508A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrolyte
- salt solution
- washing
- dimethyl carbonate
- ion battery
- Prior art date
Links
- 239000003792 electrolyte Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 25
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 22
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 30
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000012266 salt solution Substances 0.000 claims abstract description 19
- 238000005406 washing Methods 0.000 claims abstract description 17
- 239000000047 product Substances 0.000 claims abstract description 15
- 238000004821 distillation Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 239000012074 organic phase Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000000706 filtrate Substances 0.000 claims abstract description 6
- 150000003839 salts Chemical class 0.000 claims abstract description 4
- 239000002699 waste material Substances 0.000 claims description 12
- 239000008346 aqueous phase Substances 0.000 claims description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 9
- 229910052744 lithium Inorganic materials 0.000 claims description 9
- 239000013078 crystal Substances 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 8
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 5
- 235000002639 sodium chloride Nutrition 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 2
- 235000011164 potassium chloride Nutrition 0.000 claims description 2
- 239000001103 potassium chloride Substances 0.000 claims description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 claims description 2
- 235000011151 potassium sulphates Nutrition 0.000 claims description 2
- 239000011780 sodium chloride Substances 0.000 claims description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 2
- 235000011152 sodium sulphate Nutrition 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
- 239000012071 phase Substances 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract description 7
- -1 carbonate ester Chemical class 0.000 abstract description 5
- 150000001768 cations Chemical class 0.000 abstract description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 238000005809 transesterification reaction Methods 0.000 abstract description 2
- 230000003197 catalytic effect Effects 0.000 abstract 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 10
- 239000012634 fragment Substances 0.000 description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 3
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 3
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 3
- OJURWUUOVGOHJZ-UHFFFAOYSA-N methyl 2-[(2-acetyloxyphenyl)methyl-[2-[(2-acetyloxyphenyl)methyl-(2-methoxy-2-oxoethyl)amino]ethyl]amino]acetate Chemical compound C=1C=CC=C(OC(C)=O)C=1CN(CC(=O)OC)CCN(CC(=O)OC)CC1=CC=CC=C1OC(C)=O OJURWUUOVGOHJZ-UHFFFAOYSA-N 0.000 description 3
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- 238000005292 vacuum distillation Methods 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- ZFTFAPZRGNKQPU-UHFFFAOYSA-N dicarbonic acid Chemical compound OC(=O)OC(O)=O ZFTFAPZRGNKQPU-UHFFFAOYSA-N 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/54—Reclaiming serviceable parts of waste accumulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
Definitions
- the invention belongs to the technical field of battery material recycling, and specifically relates to a method for efficient recycling of waste lithium-ion battery electrolyte.
- the electrolyte in lithium-ion batteries accounts for about 17% of the battery. It is generally composed of carbonate organic solvents such as ethylene carbonate (EC), dimethyl carbonate (DMC), ethyl methyl carbonate (EMC), and propylene carbonate. (PC), electrolyte lithium salt lithium hexafluorophosphate (LiPF 6 ), additives, etc.
- EC ethylene carbonate
- DMC dimethyl carbonate
- EMC ethyl methyl carbonate
- PC propylene carbonate
- additives etc.
- Electrolyte collection problem In lithium-ion batteries, the electrolyte is distributed between the positive and negative electrode sheets and the separator. When the electrolyte is poured out from the battery, most of the electrolyte is Between the pole piece and the separator, there is very little electrolyte that can be poured directly from the battery. There is no efficient and convenient collection method for electrolyte in current literature reports.
- Carbonate recovery problem The carbonates reported in the current literature are all carbonate products obtained by direct vacuum distillation. However, the carbonate product obtained by vacuum distillation is not a single carbonate, but a mixture of several carbonates, which is difficult to carry out. It is difficult to sell in the market if it is reused.
- the present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention proposes a method for efficient recovery of electrolyte from waste lithium ion batteries, which can collect electrolyte economically and efficiently, and the distilled carbonate product has high purity.
- a method for efficient recovery of spent lithium-ion battery electrolyte which includes the following steps:
- the electrolyte contains the following components: lithium salt 1-2mol/L, dimethyl carbonate 40-60v%, ethyl methyl carbonate 5-25v%, ethylene carbonate Ester 10-25v%, propylene carbonate 0-10v%.
- the lithium salt is lithium hexafluorophosphate.
- the salt solution in step S1, is a neutral salt solution. Further, the salt in the salt solution is selected from one or more of sodium chloride, sodium sulfate, potassium chloride or potassium sulfate.
- step S1 the mass concentration of the salt solution is 5-25%, and the liquid-solid ratio of the salt solution to the crushed material is (2-8): 1L/kg.
- step S1 the washing is performed at a stirring speed of 60-400 r/min.
- the washing time is 5-30 minutes.
- step S2 the aqueous phase is returned to step S1 for the washing.
- step S2 the standing time for layering is 0.5-3h.
- step S3 the volume ratio of the organic phase to methanol is 1: (0.2-1).
- step S3 the crude dimethyl carbonate product is frozen and crystallized, and then the obtained dimethyl carbonate crystals are heated and melted to obtain pure dimethyl carbonate. Further, the temperature of the freeze crystallization is -5 ⁇ 3°C.
- step S3 before the distillation, the temperature is raised to 55-80°C under normal pressure for 1-3 hours.
- the residual liquid after distillation enters the next lithium extraction process.
- the residual liquid after distillation can also be used to separate and purify by-products such as ethylene glycol and propylene glycol by distillation.
- the main component of the electrolyte in lithium-ion batteries is carbonate.
- carbonates are insoluble in water and the density of carbonate is very close to the density of water. It is miscible with water and will neither dissolve in water nor stratify with water. It will be in water. Forms small droplets and is difficult to separate from water.
- the present invention uses a certain concentration of salt solution for washing.
- Solutes that do not react with the electrolyte are dissolved in the salt solution, so that the water The density of the phase becomes larger, and the density of the electrolyte is smaller than that of the water phase, so that the electrolyte can stratify with the water phase and float on top of the water phase to achieve stratification of the electrolyte and water; at the same time, part of the salt is dissolved in the salt solution during the washing process.
- Some metal cations enter the organic phase, and under the catalysis of the metal cations, carbonate and methanol undergo a transesterification reaction to generate dimethyl carbonate.
- the partial reaction formula is as follows: (CH 2 O) 2 CO (ethylene carbonate) + 2CH 3 OH ⁇ (CH 3 O) 2 CO+HOCH 2 CH 2 OH, C 4 H 6 O 3 (propylene carbonate)+2CH 3 OH ⁇ (CH 3 O) 2 CO+CH 3 CHOHCH 2 OH, the generated ethylene glycol and
- the boiling points of propylene glycol and other carbonates are higher than 100°C, while the boiling point of dimethyl carbonate is only 90°C. Therefore, the crude dimethyl carbonate product can be evaporated under temperature control, and the dimethyl carbonate can subsequently be purified by freezing crystallization. .
- the invention can collect the electrolyte cost-effectively and efficiently, and the distilled carbonate product has high purity and can be sold in the market.
- Figure 1 is a process flow diagram of the present invention.
- a method for efficient recycling of waste lithium-ion battery electrolyte is:
- a method for efficient recycling of waste lithium-ion battery electrolyte is:
- a range of 1-50 should be understood to include a selection from 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 ,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44 , 45, 46, 47, 48, 49, or any number, combination of numbers, or subrange of 50, and all decimal values between the above integers, for example, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6 , 1.7, 1.8, and 1.9.
- subranges consider specifically "nested subranges" that extend from any endpoint within the range.
- nested subranges of the exemplary range 1-50 may include 1-10, 1-20, 1-30, and 1-40 in one direction, or 50-40, 50-30, 50 in another direction. -20 and 50-10. .
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
Claims (10)
- 一种废锂离子电池电解液高效回收的方法,其特征在于,包括以下步骤:S1:将废锂离子电池进行破碎,得到带电解液的破碎物料,将所述破碎物料置于盐溶液中洗涤,洗涤完成后固液分离,得到滤液;S2:所述滤液静置分层,得到水相和有机相;S3:将所述有机相与甲醇混合,在温度为60-100℃、真空度为10-80kPa的条件下蒸馏出碳酸二甲酯粗产品。
- 根据权利要求1所述的方法,其特征在于,步骤S1中,所述盐溶液为中性盐溶液;所述盐溶液中的盐选自氯化钠、硫酸钠、氯化钾或硫酸钾中的一种或几种。
- 根据权利要求1所述的方法,其特征在于,步骤S1中,所述盐溶液的质量浓度为5-25%,所述盐溶液与所述破碎物料的液固比为(2-8):1L/kg。
- 根据权利要求1所述的方法,其特征在于,步骤S1中,所述洗涤在60-400r/min搅拌速度下进行。
- 根据权利要求1所述的方法,其特征在于,步骤S1中,所述洗涤的时间为5-30min。
- 根据权利要求1所述的方法,其特征在于,步骤S2中,所述水相返回步骤S1用于所述洗涤。
- 根据权利要求1所述的方法,其特征在于,步骤S2中,所述静置分层的时间为0.5-3h。
- 根据权利要求1所述的方法,其特征在于,步骤S3中,所述有机相与甲醇的体积比为1:(0.2-1)。
- 根据权利要求1所述的方法,其特征在于,步骤S3中,将所述碳酸二甲酯粗产品进行冷冻结晶,再将所得碳酸二甲酯晶体升温融化,得到纯碳酸二甲酯。
- 根据权利要求1所述的方法,其特征在于,步骤S3中,所述蒸馏后的残液进入下一道提锂工序。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2318911.1A GB2622974A (en) | 2022-05-31 | 2023-03-15 | Method for efficiently recovering electrolyte of spent lithium-ion battery |
HU2400023A HUP2400023A1 (hu) | 2022-05-31 | 2023-03-15 | Eljárás elhasznált lítium-ion akkumulátorok elektrolitjának hatékony visszanyerésére |
MX2023015296A MX2023015296A (es) | 2022-05-31 | 2023-03-15 | Metodo para la recuperacion eficiente del electrolito de la bateria de iones de litio de desecho. |
DE112023000108.1T DE112023000108T5 (de) | 2022-05-31 | 2023-03-15 | Verfahren zur effizienten Rückgewinnung von Abfall-Lithium-Ionen-Batterie-Elektrolyt |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN202210608686.7 | 2022-05-31 | ||
CN202210608686.7A CN114865134A (zh) | 2022-05-31 | 2022-05-31 | 废锂离子电池电解液高效回收的方法 |
Publications (1)
Publication Number | Publication Date |
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WO2023231508A1 true WO2023231508A1 (zh) | 2023-12-07 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/CN2023/081684 WO2023231508A1 (zh) | 2022-05-31 | 2023-03-15 | 废锂离子电池电解液高效回收的方法 |
Country Status (6)
Country | Link |
---|---|
CN (1) | CN114865134A (zh) |
DE (1) | DE112023000108T5 (zh) |
GB (1) | GB2622974A (zh) |
HU (1) | HUP2400023A1 (zh) |
MX (1) | MX2023015296A (zh) |
WO (1) | WO2023231508A1 (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114759286A (zh) * | 2022-05-30 | 2022-07-15 | 清华大学深圳国际研究生院 | 一种锂离子电池废旧电解液的回收方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114865134A (zh) * | 2022-05-31 | 2022-08-05 | 广东邦普循环科技有限公司 | 废锂离子电池电解液高效回收的方法 |
CN115528338A (zh) * | 2022-09-16 | 2022-12-27 | 广东邦普循环科技有限公司 | 一种从锂离子电池电解液中回收锂的方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4181676A (en) * | 1977-09-07 | 1980-01-01 | Bayer Aktiengesellschaft | Process for the preparation of dialkyl carbonates |
CN106659947A (zh) * | 2014-06-18 | 2017-05-10 | 罗地亚经营管理公司 | 用于回收电解质盐的方法 |
CN108923092A (zh) * | 2018-06-29 | 2018-11-30 | 惠州市宙邦化工有限公司 | 一种废旧锂离子电池电解液处理方法 |
CN111454152A (zh) * | 2020-06-22 | 2020-07-28 | 东营市海科新源化工有限责任公司 | 电子级碳酸二甲酯的制备方法及其制备装置 |
CN112531227A (zh) * | 2019-09-17 | 2021-03-19 | 天津理工大学 | 一种废旧锂离子电池中电解液的无害化回收处理方法 |
CN114865134A (zh) * | 2022-05-31 | 2022-08-05 | 广东邦普循环科技有限公司 | 废锂离子电池电解液高效回收的方法 |
-
2022
- 2022-05-31 CN CN202210608686.7A patent/CN114865134A/zh active Pending
-
2023
- 2023-03-15 MX MX2023015296A patent/MX2023015296A/es unknown
- 2023-03-15 DE DE112023000108.1T patent/DE112023000108T5/de active Pending
- 2023-03-15 WO PCT/CN2023/081684 patent/WO2023231508A1/zh active Application Filing
- 2023-03-15 GB GB2318911.1A patent/GB2622974A/en active Pending
- 2023-03-15 HU HU2400023A patent/HUP2400023A1/hu unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4181676A (en) * | 1977-09-07 | 1980-01-01 | Bayer Aktiengesellschaft | Process for the preparation of dialkyl carbonates |
CN106659947A (zh) * | 2014-06-18 | 2017-05-10 | 罗地亚经营管理公司 | 用于回收电解质盐的方法 |
CN108923092A (zh) * | 2018-06-29 | 2018-11-30 | 惠州市宙邦化工有限公司 | 一种废旧锂离子电池电解液处理方法 |
CN112531227A (zh) * | 2019-09-17 | 2021-03-19 | 天津理工大学 | 一种废旧锂离子电池中电解液的无害化回收处理方法 |
CN111454152A (zh) * | 2020-06-22 | 2020-07-28 | 东营市海科新源化工有限责任公司 | 电子级碳酸二甲酯的制备方法及其制备装置 |
CN114865134A (zh) * | 2022-05-31 | 2022-08-05 | 广东邦普循环科技有限公司 | 废锂离子电池电解液高效回收的方法 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114759286A (zh) * | 2022-05-30 | 2022-07-15 | 清华大学深圳国际研究生院 | 一种锂离子电池废旧电解液的回收方法 |
Also Published As
Publication number | Publication date |
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CN114865134A (zh) | 2022-08-05 |
DE112023000108T5 (de) | 2024-05-29 |
GB202318911D0 (en) | 2024-01-24 |
MX2023015296A (es) | 2024-01-22 |
GB2622974A (en) | 2024-04-03 |
HUP2400023A1 (hu) | 2024-06-28 |
GB2622974A8 (en) | 2024-05-15 |
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