CN103848490A - Method for removing cobalt in cobalt-containing wastewater - Google Patents
Method for removing cobalt in cobalt-containing wastewater Download PDFInfo
- Publication number
- CN103848490A CN103848490A CN201210519634.9A CN201210519634A CN103848490A CN 103848490 A CN103848490 A CN 103848490A CN 201210519634 A CN201210519634 A CN 201210519634A CN 103848490 A CN103848490 A CN 103848490A
- Authority
- CN
- China
- Prior art keywords
- cobalt
- containing wastewater
- wastewater
- present
- precipitate
- 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.)
- Granted
Links
- 229910017052 cobalt Inorganic materials 0.000 title claims abstract description 94
- 239000010941 cobalt Substances 0.000 title claims abstract description 94
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 239000002351 wastewater Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 31
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 13
- 239000007844 bleaching agent Substances 0.000 claims description 13
- 239000000460 chlorine Substances 0.000 claims description 13
- 229910052801 chlorine Inorganic materials 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000008901 benefit Effects 0.000 abstract description 8
- UBEWDCMIDFGDOO-UHFFFAOYSA-N cobalt(2+);cobalt(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Co+2].[Co+3].[Co+3] UBEWDCMIDFGDOO-UHFFFAOYSA-N 0.000 abstract description 8
- 238000001914 filtration Methods 0.000 abstract description 5
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 abstract description 5
- 239000002244 precipitate Substances 0.000 abstract description 4
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 150000002500 ions Chemical class 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 229910052751 metal Inorganic materials 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 150000001868 cobalt Chemical class 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000004062 sedimentation Methods 0.000 abstract description 2
- 239000005708 Sodium hypochlorite Substances 0.000 abstract 2
- 230000003197 catalytic effect Effects 0.000 abstract 1
- 229910021645 metal ion Inorganic materials 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 150000001869 cobalt compounds Chemical class 0.000 description 2
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003456 ion exchange resin Substances 0.000 description 2
- 229920003303 ion-exchange polymer Polymers 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- MULYSYXKGICWJF-UHFFFAOYSA-L cobalt(2+);oxalate Chemical compound [Co+2].[O-]C(=O)C([O-])=O MULYSYXKGICWJF-UHFFFAOYSA-L 0.000 description 1
- ASKVAEGIVYSGNY-UHFFFAOYSA-L cobalt(ii) hydroxide Chemical compound [OH-].[OH-].[Co+2] ASKVAEGIVYSGNY-UHFFFAOYSA-L 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
The invention provides a method for removing cobalt in cobalt-containing wastewater. The method comprises the following steps: reacting the cobalt-containing wastewater and a sodium hypochlorite solution in sunshine under the condition that the pH value is 10-12 so as to obtain a precipitate, and filtering to remove the precipitate. By utilizing the properties of sodium hypochlorite and catalytic action of sunshine, the ion cobalt in the cobalt-containing wastewater is oxidized and precipitated, the cobalt precipitate is filtered and removed, and the content of metal ion cobalt in the cobalt-containing wastewater can be effectively reduced, so that the wastewater can reach the standard to emit, and the metal cobalt can be recycled. The method provided in the invention can be used for treating the wastewater generated in the production process of various cobalt salts such as cobaltosic oxide by virtue of wet preparation, the sedimentation effect is good, novel pollutants are not introduced, and the method is low in cost, simple in operation and suitable for industrialization and has high economic benefits and social benefits.
Description
Technical field
The present invention relates to chemical technology field, particularly a kind of method of removing cobalt in cobalt-containing wastewater.
Background technology
At present, lithium ion battery has been widely used in the product such as mobile telephone, notebook computer.Therefore, to the demand of cobalt compound that can be used as anode material for lithium-ion batteries also in quick increase.But, in the time preparing cobalt compound, can produce a large amount of cobalt-containing wastewaters.If can not effectively remove cobalt wherein, not only can be to environment, and can cause waste to the cobalt of resource scarcity.As can be seen here, the research of removing the method for cobalt in cobalt-containing wastewater is had to very significant Social benefit and economic benefit.
Prior art is mainly removed cobalt by the physical method that adopts ion exchange resin from cobalt-containing wastewater, but this method complicated operation, and cost is higher.In order to simplify the operation, prior art is used sodium sulphite Na
2s processes cobalt-containing wastewater, realizes the removal of cobalt by chemical process precipitate cobalt.
Although aforesaid method is easier than ion-exchange-resin process, but the removal efficiency of cobalt is lower, and introduce again new sulphide staining thing, thereby make cobalt-containing wastewater after treatment not reach discharging standards, i.e. CNS GB25467-2010 copper, nickel, cobalt emission of industrial pollutants standard " in regulation cobalt content be lower than 1mg/L.
Summary of the invention
In order to solve above technical problem, the invention provides a kind of method of removing cobalt in cobalt-containing wastewater, the method is higher to the removal efficiency of cobalt, can effectively reduce the content of cobalt in cobalt-containing wastewater, so that discharged wastewater met the national standard.
The invention provides a kind of method of removing cobalt in cobalt-containing wastewater, comprise the following steps:
Under the condition that is 10 ~ 12 in pH value, cobalt-containing wastewater is reacted in the sun with chlorine bleach liquor, be precipitated thing, remove by filter described throw out.
Preferably, the time of described reaction is more than 5 hours.
Preferably, described pH value is regulated by sodium hydroxide solution.
Preferably, the mass concentration of described sodium hydroxide solution is 25% ~ 35%.
Preferably, in described cobalt-containing wastewater, the concentration of cobalt is 5mg/L ~ 100mg/L.
Preferably, described chlorine bleach liquor's mass concentration is 10%.
Compared with prior art, under the condition that the present invention is 10 ~ 12 by cobalt-containing wastewater and chlorine bleach liquor in pH value, be placed under sunlight and react, then remove by filter the throw out that described reaction obtains, thereby remove the cobalt in described cobalt-containing wastewater.The present invention utilizes the character of clorox and the katalysis of sunlight, ionic cobalt in oxidation precipitation cobalt-containing wastewater, and cobalt is precipitated by removing by filter, can effectively reduce the content of ion cobalt in described cobalt-containing wastewater, not only can make discharged wastewater met the national standard, and can make cobalt metal be recycled recycling, benefit is larger, is suitable for promoting.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these are described is for further illustrating the features and advantages of the present invention, rather than limiting to the claimed invention.
The invention provides a kind of method of removing cobalt in cobalt-containing wastewater, comprise the following steps:
Under the condition that is 10 ~ 12 in pH value, cobalt-containing wastewater is reacted in the sun with chlorine bleach liquor, be precipitated thing, remove by filter described throw out.
The present invention adds chlorine bleach liquor in cobalt-containing wastewater, under the condition that is 10 ~ 12, is placed under sunlight and reacts in pH value, is precipitated thing, after filtration, removes described throw out, realizes the removal of cobalt in described cobalt-containing wastewater.
In the present invention, the kind of described cobalt-containing wastewater has rose vitriol or cobalt chloride to prepare with sodium hydroxide or ammoniacal liquor wet method the waste water that tricobalt tetroxide produces, and the waste water producing in direct carbonate synthesis cobalt, hydroxide cobalt or cobalt oxalate process etc.In described cobalt-containing wastewater, the concentration of cobalt is preferably 5mg/L ~ 100mg/L, more preferably 10mg/L ~ 100mg/L.
The present invention is first placed in beaker by described cobalt-containing wastewater and carries out pre-treatment, and regulating its pH value is 10 ~ 12, is preferably 10.5 ~ 11.6.In the present invention, described pH value is preferably regulated by sodium hydroxide solution, and described sodium hydroxide solution is liquid industrial sodium hydroxide, and it is cheap, and contamination-free introducing, applies better.The present invention preferably adds sodium hydroxide solution to regulate pH value in described cobalt-containing wastewater, and the mass concentration of described sodium hydroxide solution is preferably 25% ~ 35%, and more preferably 30%.
After pre-treatment, the present invention adds chlorine bleach liquor in above-mentioned cobalt-containing wastewater beaker, is placed under sunlight and reacts, and is beneficial to react completely, and is precipitated thing.Wherein, described chlorine bleach liquor's mass concentration is preferably 10%, is applicable to industrialization.In one embodiment of the invention, get cobalt-containing wastewater 2000mL, chlorine bleach liquor 10mL ~ 100mL.The time of described reaction is preferably more than 5 hours, more preferably 8 hours ~ 20 hours.Described reaction is preferably carried out under the condition stirring, and is beneficial to sufficient reacting and carries out.
The present invention utilizes the character of clorox and the katalysis of sunlight, and the ionic cobalt in oxidation precipitation cobalt-containing wastewater generates cobalt precipitation, reaction formula as the formula (1):
4OH
-+3Co
2++2ClO
-→Co
3O
4（s）+2Cl
-+2H
2O （1）。
Be precipitated after thing, the present invention filters with filter paper, removes described throw out by solid-liquid separation, thereby removes the cobalt in described cobalt-containing wastewater.Describedly be filtered into technique means well known to those skilled in the art, the present invention there is no particular restriction, as described in filter paper be common qualitative filter paper.
After filtration completes, obtain filtrate, through the present invention's cobalt-containing wastewater after treatment, the present invention adopts atomic absorption spectrometry (AAS) or uses inductively coupled plasma diverging light spectrometer ICP-OES to carry out the detection of cobalt contents to it.Detected result shows, meets CNS GB25467-2010 " copper, nickel, cobalt emission of industrial pollutants standard " through the present invention's cobalt-containing wastewater after treatment.
Under the condition that the present invention is 10 ~ 12 in pH value, cobalt-containing wastewater is reacted in the sun with chlorine bleach liquor, be precipitated thing, remove by filter described throw out.The present invention utilizes the character of clorox and the katalysis of sunlight, ionic cobalt in oxidation precipitation cobalt-containing wastewater, can effectively reduce the content of ion cobalt in described cobalt-containing wastewater, not only can make discharged wastewater met the national standard, and can make cobalt metal be recycled recycling.Method provided by the invention can be used for processing wet method and prepares the waste water producing in all kinds of cobalt salt production processes such as tricobalt tetroxide, and sedimentation effect is good, and can not introduce new pollutent, cost is lower, simple to operate, there is larger economic benefit and social benefit, be suitable for industrialization.
In order further to understand the present invention, below in conjunction with embodiment, the method for cobalt in removal cobalt-containing wastewater provided by the invention is specifically described.
In following examples, cobalt-containing wastewater is to obtain while adopting cobalt chloride and sodium hydroxide wet method to prepare tricobalt tetroxide.
Embodiment 1
Get 2000mL cobalt-containing wastewater, its cobalt concentration is 29.5mg/L, and adding concentration is 30% sodium hydroxide solution, and regulating pH value is 11.02, then under the condition stirring, adding 20mL concentration is 10% chlorine bleach liquor, be placed under sunlight and react, react 10 hours, be precipitated thing, remove described throw out with filter paper filtering, obtain filtrate, detect through AAS, its cobalt concentration is 0.9mg/L.
Embodiment 2
Get 2000mL cobalt-containing wastewater, its cobalt concentration is 17.3mg/L, and adding concentration is 30% sodium hydroxide solution, and regulating pH value is 11.51, then under the condition stirring, adding 20mL concentration is 10% chlorine bleach liquor, be placed under sunlight and react, react 15 hours, be precipitated thing, remove described throw out with filter paper filtering, obtain filtrate, detect through AAS, its cobalt concentration is 0.85mg/L.
As seen from the above embodiment, the method that the embodiment of the present invention provides is higher to the removal efficiency of cobalt, can effectively reduce the content of cobalt in cobalt-containing wastewater, so that discharged wastewater met the national standard.
The explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (6)
1. a method of removing cobalt in cobalt-containing wastewater, comprises the following steps:
Under the condition that is 10 ~ 12 in pH value, cobalt-containing wastewater is reacted in the sun with chlorine bleach liquor, be precipitated thing, remove by filter described throw out.
2. method according to claim 1, is characterized in that, the time of described reaction is more than 5 hours.
3. method according to claim 1, is characterized in that, described pH value is regulated by sodium hydroxide solution.
4. method according to claim 3, is characterized in that, the mass concentration of described sodium hydroxide solution is 25% ~ 35%.
5. method according to claim 1, is characterized in that, in described cobalt-containing wastewater, the concentration of cobalt is 5mg/L ~ 100mg/L.
6. method according to claim 1, is characterized in that, described chlorine bleach liquor's mass concentration is 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210519634.9A CN103848490B (en) | 2012-12-05 | 2012-12-05 | Remove the method for cobalt in cobalt-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210519634.9A CN103848490B (en) | 2012-12-05 | 2012-12-05 | Remove the method for cobalt in cobalt-containing wastewater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103848490A true CN103848490A (en) | 2014-06-11 |
| CN103848490B CN103848490B (en) | 2015-09-23 |
Family
ID=50856667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210519634.9A Active CN103848490B (en) | 2012-12-05 | 2012-12-05 | Remove the method for cobalt in cobalt-containing wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103848490B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3022538A1 (en) * | 2014-06-23 | 2015-12-25 | Commissariat Energie Atomique | PROCESS FOR REMOVING ONE OR MORE CHEMICAL ELEMENTS INCLUDED IN AQUEOUS SOLUTION |
| CN106868495A (en) * | 2017-01-23 | 2017-06-20 | 江苏理工学院 | A kind of recycling method of cobalt salt chemical oxidation waste liquid |
| CN112374679A (en) * | 2020-10-30 | 2021-02-19 | 格林美（江苏）钴业股份有限公司 | Treatment method of wastewater generated in cobaltosic oxide preparation process |
| CN114560591A (en) * | 2022-03-04 | 2022-05-31 | 珠海市科立鑫金属材料有限公司 | Clean treatment process of cobalt-containing wastewater |
| CN114703013A (en) * | 2022-03-09 | 2022-07-05 | 南京工业职业技术大学 | Method for removing residual cobalt ions in Cu-Zn-Co coating steel cord wet drawing wetting liquid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04250889A (en) * | 1990-10-04 | 1992-09-07 | Kyodo Kumiai Fukuyama Kinzoku Kogyo Center | Treatment and treating device for waste liquid of surface treatment |
| JP2002292373A (en) * | 2001-03-30 | 2002-10-08 | National Institute Of Advanced Industrial & Technology | Method for reducing heavy metal sludge and chemical used for it |
| CN1611454A (en) * | 2003-10-27 | 2005-05-04 | 中国科学院化学研究所 | Method for photo-oxidative flocculating treatment of organic pollutant waster water |
-
2012
- 2012-12-05 CN CN201210519634.9A patent/CN103848490B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04250889A (en) * | 1990-10-04 | 1992-09-07 | Kyodo Kumiai Fukuyama Kinzoku Kogyo Center | Treatment and treating device for waste liquid of surface treatment |
| JP2002292373A (en) * | 2001-03-30 | 2002-10-08 | National Institute Of Advanced Industrial & Technology | Method for reducing heavy metal sludge and chemical used for it |
| CN1611454A (en) * | 2003-10-27 | 2005-05-04 | 中国科学院化学研究所 | Method for photo-oxidative flocculating treatment of organic pollutant waster water |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3022538A1 (en) * | 2014-06-23 | 2015-12-25 | Commissariat Energie Atomique | PROCESS FOR REMOVING ONE OR MORE CHEMICAL ELEMENTS INCLUDED IN AQUEOUS SOLUTION |
| CN106868495A (en) * | 2017-01-23 | 2017-06-20 | 江苏理工学院 | A kind of recycling method of cobalt salt chemical oxidation waste liquid |
| CN106868495B (en) * | 2017-01-23 | 2019-06-11 | 江苏理工学院 | A kind of recycling and reusing method of cobalt salt chemical oxidation waste liquid |
| CN112374679A (en) * | 2020-10-30 | 2021-02-19 | 格林美（江苏）钴业股份有限公司 | Treatment method of wastewater generated in cobaltosic oxide preparation process |
| CN114560591A (en) * | 2022-03-04 | 2022-05-31 | 珠海市科立鑫金属材料有限公司 | Clean treatment process of cobalt-containing wastewater |
| CN114703013A (en) * | 2022-03-09 | 2022-07-05 | 南京工业职业技术大学 | Method for removing residual cobalt ions in Cu-Zn-Co coating steel cord wet drawing wetting liquid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103848490B (en) | 2015-09-23 |
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Address after: Yuyao xiaocao'e town Zhejiang city Ningbo province Caoejiang village 315400 Patentee after: Ningbo 100 lithium material Co. Ltd. Address before: 315400 Zhejiang Province, Yuyao City Jia Ling Road No. 39 Patentee before: NINGBO JINHE LITHIUM BATTERY MATERIAL CO., LTD. |
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Address after: Yuyao xiaocao'e town Zhejiang city Ningbo province Caoejiang village 315400 Patentee after: Ningbo new energy Polytron Technologies Inc Address before: Yuyao xiaocao'e town Zhejiang city Ningbo province Caoejiang village 315400 Patentee before: Ningbo 100 lithium material Co. Ltd. |