CN107180991B - Method for recycling waste lithium batteries - Google Patents

Method for recycling waste lithium batteries Download PDF

Info

Publication number
CN107180991B
CN107180991B CN201710311098.6A CN201710311098A CN107180991B CN 107180991 B CN107180991 B CN 107180991B CN 201710311098 A CN201710311098 A CN 201710311098A CN 107180991 B CN107180991 B CN 107180991B
Authority
CN
China
Prior art keywords
aniline
waste lithium
positive electrode
electrode material
lithium batteries
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710311098.6A
Other languages
Chinese (zh)
Other versions
CN107180991A (en
Inventor
时鹏辉
王旭
赵磊
秦欣
邱海俊
杨玲霞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai University of Electric Power
Original Assignee
Shanghai University of Electric Power
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai University of Electric Power filed Critical Shanghai University of Electric Power
Priority to CN201710311098.6A priority Critical patent/CN107180991B/en
Publication of CN107180991A publication Critical patent/CN107180991A/en
Application granted granted Critical
Publication of CN107180991B publication Critical patent/CN107180991B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • 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

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)
  • Manufacture And Refinement Of Metals (AREA)
  • Processing Of Solid Wastes (AREA)
  • Primary Cells (AREA)

Abstract

The invention relates to a method for recycling waste lithium batteries, which comprises the following steps of (1) placing the waste lithium batteries in protective gas for disassembly to obtain active positive electrode materials; (2) collecting active fractionsCleaning the electrode material with deionized water and ethanol; (3) drying and recycling the cleaned material; (4) at room temperature, adding a proper amount of dried material into aniline solution, and adding a certain amount of potassium hydrogen persulfate composite salt to generate SO4 －And oxidizing and degrading aniline. Compared with the prior art, the method has short time effect and simple operation, and solves the problems of environmental pollution caused by waste lithium batteries and secondary pollution caused by metal extraction on one hand; on the other hand, the method is used for treating the sewage which is difficult to degrade, thereby saving the treatment cost and creating the environmental benefit.

Description

Method for recycling waste lithium batteries
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to a method for recycling waste lithium batteries.
Background
Batteries are widely used as energy storage devices in various electronic products and electric vehicles, and the consumption of batteries is gradually increased with the increase of public demand for electronic products. In the united states and europe, it is estimated that 80 billion batteries can be consumed each year; in japan, 60 hundred million batteries were produced and consumed in 2004 alone. In china, the amount of scrapped batteries is even more dramatic, with about 100 million discarded batteries annually weighing about 30 million tons; if the batteries are buried without any treatment, 100 hundred million m of batteries can be obtained3The water body is polluted to about 4000k m3The soil loses the function of use. The waste lithium ion batteries contain high-value metals such as cobalt, iron, aluminum, copper and the like, and are recycled by adopting a certain treatment means, so that the influence on the environment can be reduced, and the cyclic utilization of resources can be realized.
Based on sulfate radicals (SO 4)-Advanced oxidation technologies (AOPs-SRs) are a new high-efficiency water treatment technology developed in recent years to degrade refractory organic pollutants in water. Studies have shown that SO4－Not only over a wide pH range (3 to 8)Shows higher oxidation activity and SO4 under neutral condition－The redox potential of the element is close to or even higher than OH, which is extremely oxidizing. Transition metal ion catalysis PMS to generate SO4-Is one of the most widely used methods. At the same time, Cu of multiple transition metals2+、Co2+、Mn2+、Ni2+、Fe2+、Fe3+、Ru3+、Ce3+And V3+All can catalyze PMS to generate SO4-·。
At present, the research on recycling of waste lithium ion batteries mainly focuses on the extraction of metals in positive active substances in the batteries, but secondary pollution is easily caused in the extraction process. Chinese patent CN106129513A discloses a method for recovering various materials from waste lithium batteries, which comprises dividing the waste lithium batteries into positive plates, diaphragms and negative plates, and then recovering and reusing the electrode materials, binders and current collectors in the positive/negative plates. The recovery process of the patent is complex, solvents such as N, N-dimethylpropionamide and the like are used more, high-temperature stirring and mixed solvent recovery rectification are involved, toxic and harmful gases are easy to generate, the high-temperature energy consumption increases the cost, and finally, only the electrode material is obtained through separation, and the electrode material is not utilized innovatively. In order to recycle the waste lithium batteries more simply, safely, efficiently, with low cost and high benefit, an innovative recycling process is provided in the invention.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a method for recycling waste lithium batteries, which is simple and effective in technology, solves the problem of waste lithium battery treatment on one hand, and generates great environmental benefits by using a positive electrode material as a catalyst on the other hand.
The purpose of the invention can be realized by the following technical scheme:
a method for recycling waste lithium batteries comprises the following steps:
(1) placing the waste lithium battery in protective gas for disassembling to obtain an active positive electrode material;
(2) collecting active positive electrode materials, and then cleaning with deionized water and ethanol;
(3) drying and recycling the cleaned material;
(4) at room temperature, adding a proper amount of dried material into aniline solution, and adding a certain amount of potassium hydrogen persulfate composite salt to generate SO4 －Oxidative degradation of aniline.
The protective gas in the step (1) is nitrogen or inert gas, and the active positive electrode material is mainly manganese dioxide.
And (2) crushing the collected anode material uniformly, washing the anode material with absolute ethyl alcohol for 3-5 times, washing the anode material with water until the solution is neutral, stirring the anode material in the washing process, standing and precipitating the anode material for 2-10 minutes, and pouring out the supernatant.
And (3) carrying out vacuum drying on the cleaned anode material at the temperature of 50-70 ℃ for 12-24 h.
The amount of the positive electrode material added in the step (4) is 2-10 mg/100ml of aniline solution, the amount of the potassium hydrogen persulfate composite salt added is 5-20 mg/100ml of aniline solution, the pH value of the aniline solution is 6-8, and the concentration of the aniline solution is 10-30 ppm.
The method safely and simply recovers the waste lithium battery, effectively utilizes waste materials in the recovery process, is environment-friendly, uses the anode material as the catalyst, and saves the material and cost for producing the catalyst again. The anode material of the waste lithium battery is used as a heterogeneous catalyst for catalytic oxidation reaction for degrading aniline wastewater by an advanced oxidation technology based on sulfate radicals, and aniline can be degraded by 100% in only 60 minutes under a certain condition. The effect is close to the same condition, the material synthesized by the prior art is used as a heterogeneous catalyst for catalyzing the catalytic oxidation reaction time of aniline wastewater degradation by the Fenton-like technology of sulfate radicals. Compared with the existing waste lithium battery recycling technology, the method is simple, direct and green, and the SO4 is generated by combining the catalysis of the advanced oxidation technology－Degrading the polluted wastewater and obtaining environmental protection benefits.
Compared with the existing lithium battery recycling technology, the invention has the following advantages:
(1) the recovery process has very low cost, partial benefits can be obtained by recovering copper and iron in the lithium battery, and the medicament cost in the metal extraction process and the secondary waste liquid pollution caused by the medicament cost are avoided.
(2) The anode material in the lithium battery is used as a heterogeneous catalyst and can be recycled for multiple times, so that the production cost of the catalyst is saved.
(3) Catalytic generation of SO in combination with advanced oxidation technology4 －Oxidation and degradation of wastewater, and benefits in wastewater treatment.
Drawings
FIG. 1 is an X-ray diffraction diagram of a positive electrode material of a waste lithium battery.
FIG. 2 is a scanning electron microscope image of the waste lithium battery positive electrode material before and after reaction as a catalyst.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
A new method for recycling waste lithium batteries specifically comprises the following steps:
(1) placing the waste lithium battery in protective gas, disassembling the waste lithium battery by using a disassembling machine, classifying the disassembled material according to the material, and collecting the anode material mainly containing manganese dioxide.
(2) Crushing the collected positive electrode material into fine particles, washing with absolute ethyl alcohol for 3 times, washing with water until the solution is neutral, stirring in the washing process, standing for precipitation, and pouring out the supernatant.
(3) And (3) drying the cleaned positive electrode material for 24 hours in vacuum at the temperature of 60 ℃.
(4) 3mg of manganese dioxide material was added to 100ml of a pH 7 aniline solution of 20ppm in volume, and 10mg of oxone complex salt was added.
Fig. 1 is an X-ray diffraction diagram of a positive electrode material mainly composed of manganese dioxide, and it can be seen from fig. 1 that the main component is manganese dioxide and carbon is present, and the positive electrode material of the spent lithium battery contains a large amount of impurities due to intercalation and deintercalation of lithium ions during use of the lithium battery, and the crystallinity of manganese dioxide is not so good.
Fig. 2 is a scanning electron microscope image of the cathode material before and after the reaction as the catalyst, and it can be seen from fig. 2 that the surface of the catalyst becomes smooth before and after the reaction, which is caused by shaking friction during the reaction process, and the front and back shapes do not change significantly, indicating that the catalyst has a certain stability.
Example 2
The method takes manganese dioxide as a main anode material as a heterogeneous catalyst, is used for a catalytic oxidation reaction for degrading aniline wastewater by an advanced oxidation technology based on sulfate radicals, and comprises the following specific processes:
100ml of aniline waste water having a concentration of 20ppm was taken in a 250ml Erlenmeyer flask, 10mg of oxone complex salt was added, followed by 5mg of catalyst. The pH of the solution was adjusted to neutral with 185mg of disodium hydrogen phosphate and 152mg of sodium dihydrogen phosphate. Placing the conical flask on a constant-temperature water bath shaker at 25 ℃ for stirring reaction, taking a sample at intervals by taking an oxidant as a timing zero point, immediately adding methanol with the same volume for quenching, filtering by using a 0.22um filter membrane, determining by using a High Performance Liquid Chromatograph (HPLC), and calculating the degradation efficiency of the degraded aniline according to the relationship between the concentration of aniline in the solution and the absorbance: 60 minutes are needed for 100 percent degradation of aniline, and the catalyst can be recycled for multiple times.
Comparative example
alpha-MnO synthesized by using the prior art2The catalyst is used as a heterogeneous catalyst for catalyzing the catalytic oxidation reaction for degrading aniline by using an advanced oxidation technology based on sulfate radicals, and the specific process is as follows:
100ml of aniline waste water having a concentration of 20ppm was taken in a 250ml Erlenmeyer flask, 10mg of oxone complex salt was added, followed by 5mg of catalyst. The pH of the solution was adjusted to neutral with 185mg of disodium hydrogen phosphate and 152mg of sodium dihydrogen phosphate. Placing the conical flask on a constant-temperature water bath shaker at 25 ℃ for stirring reaction, taking a sample at intervals by taking an oxidant as a timing zero point, immediately adding methanol with the same volume for quenching, filtering by using a 0.22um filter membrane, determining by using a High Performance Liquid Chromatograph (HPLC), and calculating the degradation efficiency of the degraded aniline according to the relationship between the concentration of aniline in the solution and the absorbance: 100% degradation of aniline takes 60 minutes. The catalytic effect of the manganese dioxide is basically consistent with that of manganese dioxide in waste lithium batteries.
By comparing the above example 2 with the comparative example, the anode material of the waste lithium battery is used as the catalyst and the synthesized alpha-MnO2The catalytic effect is basically consistent. This demonstrates that the method of the invention has practical effects, saves the cost of synthesizing the catalyst, achieves resource utilization, and produces economic and environmental benefits.
Example 3
A method for recycling waste lithium batteries comprises the following steps:
(1) placing the waste lithium battery in nitrogen for disassembling to obtain an active positive electrode material, wherein manganese dioxide is taken as a main material;
(2) crushing the collected positive electrode material uniformly, washing with absolute ethyl alcohol for 3 times, then washing with water until the solution is neutral, stirring in the washing process, standing for precipitating for minutes, and pouring out the supernatant;
(3) vacuum drying the cleaned anode material at the temperature of 50 ℃ for 24 hours;
(4) adding 2mg of dried material into 100ml of aniline solution at room temperature, wherein the pH value of the aniline solution is 6 and the concentration is 10ppm, and adding 5mg of potassium hydrogen persulfate composite salt to generate SO4 －Oxidative degradation of aniline.
Example 4
A method for recycling waste lithium batteries comprises the following steps:
(1) placing the waste lithium battery in nitrogen for disassembling to obtain an active positive electrode material, wherein manganese dioxide is taken as a main material;
(2) crushing the collected positive electrode material uniformly, washing with absolute ethyl alcohol for 4 times, then washing with water until the solution is neutral, stirring in the washing process, standing for precipitating for minutes, and pouring out the supernatant;
(3) vacuum drying the cleaned anode material at the temperature of 60 ℃ for 24 hours;
(4) at room temperature, 10mg of the dried material was added to 100ml of an aniline solution having a pH of 7 and a concentration of 20ppm, and 5mg of oxone complex salt was added to produce SO4 －Oxidative degradation of aniline.
Example 5
A method for recycling waste lithium batteries comprises the following steps:
(1) placing the waste lithium battery in inert gas for disassembling to obtain an active positive electrode material, wherein manganese dioxide is taken as a main material;
(2) crushing the collected positive electrode material uniformly, washing with absolute ethyl alcohol for 5 times, then washing with water until the solution is neutral, stirring in the washing process, standing for precipitating for minutes, and pouring out the supernatant;
(3) vacuum drying the cleaned anode material at the temperature of 70 ℃ for 12 h;
(4) at room temperature, 10mg of the dried material was added to 100ml of an aniline solution having a pH of 8 and a concentration of 30ppm, and 20mg of oxone complex salt was added to produce SO4 －Oxidative degradation of aniline.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.

Claims (1)

1. A method for recycling waste lithium batteries is characterized by comprising the following steps:
(1) the method comprises the following steps of (1) placing a waste lithium battery in protective gas for disassembling to obtain an active positive electrode material, wherein the active positive electrode material mainly comprises manganese dioxide;
(2) crushing the collected positive electrode material uniformly, washing with absolute ethyl alcohol for 3-5 times, washing with water until the solution is neutral, stirring in the washing process, standing for precipitation for 2-10 minutes, and pouring out the supernatant;
(3) drying and recycling the cleaned material;
(4) at room temperature, adding a proper amount of dried material into aniline solution, and adding a certain amount of potassium hydrogen persulfate composite salt to generate SO4 －Oxidative degradation of aniline, 100% degradation of aniline requiring 60 minutes;
the amount of the positive electrode material added in the step (4) is 2-10 mg/100ml of aniline solution;
the amount of the potassium hydrogen persulfate composite salt added in the step (4) is 5-20 mg/100ml of aniline solution;
the pH value of the aniline solution in the step (4) is 6-8;
the concentration of the aniline solution in the step (4) is 10-30 ppm;
the protective gas in the step (1) is nitrogen or inert gas;
and (3) carrying out vacuum drying on the cleaned anode material at the temperature of 50-70 ℃ for 12-24 h.
CN201710311098.6A 2017-05-05 2017-05-05 Method for recycling waste lithium batteries Active CN107180991B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710311098.6A CN107180991B (en) 2017-05-05 2017-05-05 Method for recycling waste lithium batteries

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710311098.6A CN107180991B (en) 2017-05-05 2017-05-05 Method for recycling waste lithium batteries

Publications (2)

Publication Number Publication Date
CN107180991A CN107180991A (en) 2017-09-19
CN107180991B true CN107180991B (en) 2020-10-23

Family

ID=59832378

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710311098.6A Active CN107180991B (en) 2017-05-05 2017-05-05 Method for recycling waste lithium batteries

Country Status (1)

Country Link
CN (1) CN107180991B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108147566B (en) * 2017-12-22 2021-09-07 上海第二工业大学 Method for catalytically degrading organic wastewater by adopting waste lithium ion battery anode material
CN109244498A (en) * 2018-09-19 2019-01-18 上海电力学院 A kind of recycling and reusing method of waste and old lithium ion battery
CN111530466B (en) * 2020-05-11 2021-10-15 湖南大学 Method for removing antibiotics in water body by using catalyst activated permonosulfate prepared from waste lithium batteries
CN113555615A (en) * 2021-06-29 2021-10-26 昆明理工大学 Method for preparing high-efficiency PMS activator from waste lithium ion battery and application
CN114335781A (en) * 2021-12-27 2022-04-12 上海电力大学 Method for extracting precious metal from waste lithium battery

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130323142A1 (en) * 2011-02-15 2013-12-05 Sumitomo Chemical Company, Limited Method for recovering active material from waste battery material

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101538655B (en) * 2009-04-28 2011-11-23 合肥工业大学 MnO recovery from waste lithium manganate battery positive electrode material 2 And applications thereof
WO2011079409A1 (en) * 2009-12-28 2011-07-07 深圳市雄韬电源科技股份有限公司 Method of recycling and reusing spent lithium iron phosphate power battery
CN103663666A (en) * 2013-12-30 2014-03-26 武汉大学 Method for carrying out cooperative oxidation treatment on organic wastewater by potassium permanganate and potassium hydrogen persulfate
CN104190434A (en) * 2014-08-22 2014-12-10 哈尔滨工业大学 Preparation of Fe3O4-MnO2 composite catalyst and method for removing organic dye in printing and dyeing wastewater by using Fe3O4-MnO2 composite catalyst
CN105576314A (en) * 2015-12-18 2016-05-11 山东精工电子科技有限公司 Recycling method of positive electrode piece of lithium ion battery
CN106241880B (en) * 2016-06-21 2018-04-06 中国石油大学(华东) Method for recovering high-purity manganese dioxide from waste dry batteries and application
CN106475090A (en) * 2016-10-13 2017-03-08 中国人民解放军后勤工程学院 A kind of Mn3O4‑MnO2Nano composite material preparation method and applications

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130323142A1 (en) * 2011-02-15 2013-12-05 Sumitomo Chemical Company, Limited Method for recovering active material from waste battery material

Also Published As

Publication number Publication date
CN107180991A (en) 2017-09-19

Similar Documents

Publication Publication Date Title
CN107180991B (en) Method for recycling waste lithium batteries
CN110783658B (en) Ex-service power ternary lithium battery recovery demonstration process method
CN111883869A (en) Method for recycling lithium by using graphite cathode of waste power battery and preparing graphene by using lithium
CN105731624B (en) Method for treating reverse osmosis concentrated water by utilizing heterogeneous Fenton-like reaction catalytic oxidation
CN111905720B (en) Application of waste battery anode material in catalyst, catalyst and preparation method thereof
CN105601074B (en) A kind of electroplating sludge cooperates with the high-efficiency resource recycling new method of processing with carbon dioxide
CN105727938A (en) Method for preparing VOCs (volatile organic compounds) from anodes of waste lithium manganese batteries
CN103641212A (en) Method for preparing graphite felt cathode material for treating organic wastewater
CN110734058A (en) method for recovering graphite catalyst from lithium battery and application thereof
EP4407747A1 (en) Method for preparing active negative electrode material by recycling battery powder leaching residues
CN113184926B (en) Method for preparing Ni-Cu LDH material by using electroplating sludge and application
CN106241880A (en) Method for recovering high-purity manganese dioxide from waste manganese dry batteries and application
CN111477986B (en) Method for preparing ternary lithium ion battery precursor by electrolyzing sodium sulfate waste liquid
CN115069269B (en) CoMoS x O y Electrocatalyst, preparation method thereof and application thereof in electro-active persulfate system degradation of organic pollutants
CN111900507A (en) Method for recycling retired lithium iron phosphate battery
CN112007644A (en) Salt template method-based two-dimensional Fe/Fe preparation method by recovering Fenton sludge3O4Method for preparing photocatalyst
Wang et al. The generation of carbon/oxygen double defects in FeP/CoP-NC enhanced by β particles for photic driving degradation of levofloxacin
CN110649346A (en) Cyclic preparation method of lithium battery positive electrode material
CN114054027A (en) Graphite material modified red mud Fenton catalyst with magnetic separation performance and preparation method and application thereof
CN111018208A (en) Method for treating electroplating wastewater and sludge
Chen et al. Recycling the Spent LiNi1− x− yMnxCoyO2 Cathodes for High‐Performance Electrocatalysts toward Both the Oxygen Catalytic and Methanol Oxidation Reactions
CN110607531A (en) Cyclic electrochemical conversion treatment method and device for gas containing hydrogen sulfide and carbon dioxide
CN207811464U (en) A kind of high ammonia-nitrogen wastewater heavy metal pretreatment system
CN109461984B (en) Method for recovering valuable metals in waste lithium ion batteries
CN113078382A (en) Lithium battery recovery processing method

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant