CN115141210B - Monomer waste liquid recovery treatment method for solid aluminum electrolytic capacitor - Google Patents
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Abstract
The invention relates to a monomer waste liquid recovery treatment method of a solid aluminum electrolytic capacitor, which is characterized in that in the monomer waste liquid, an alkali neutralizer is used for inhibiting self-polymerization and reaction of monomers; separating ethanol and monomers in the wastewater by reduced pressure distillation; the monomer is separated out and then is washed and extracted by pure water; purifying the extracted monomer by a rectifying tower, and recovering to obtain more than 98.5 percent of monomer. The method is used for solving the problem of environmental pollution caused by discarding and discharging monomer waste liquid containing 3,4 ethylene dioxythiophene in the prior art, inhibiting self-polymerization and reaction of the monomer by using an alkali neutralizer in the monomer waste liquid, separating and extracting the 3,4 ethylene dioxythiophene, recycling the 3,4 ethylene dioxythiophene with high purity for reuse, recycling about 98.5 percent of the monomer and ethanol, and achieving the effects of reducing the monomer waste liquid, meeting the national environmental protection policy and saving energy and reducing emission.
Description
Technical Field
The invention relates to the technical field of capacitor electrolyte wastewater treatment, in particular to a monomer waste liquid recovery treatment method of a solid aluminum electrolytic capacitor.
Background
The conductive polymer gate is gradually and vigorously developed, and the characteristics of heterocyclic polymers such as pyrrole, thiophene, aniline and the like are also researched. Bayer develops thiophene derivatives 3,4 ethylene dioxythiophene, which is the most widely used conductive polymer in industry due to its excellent conductive and heat-resistant properties. The aluminum electrolytic capacitor product is changed from the initial liquid electrolytic capacitor using electrolyte to the solid aluminum electrolytic capacitor polymerized by 3,4 ethylene dioxythiophene oxidation. The solid electrolytic capacitor has the advantages of low ESR, high ripple current, high temperature, long service life and the like. However, 3,4 ethylene dioxythiophene belongs to a highly toxic dangerous chemical in China, and belongs to the 3 rd stage of acute aquatic toxicity and the 3 rd stage of chronic aquatic toxicity, and has great harm to the environment, so that the discarding and discharging of the 3,4 ethylene dioxythiophene become a main problem. How to treat 3,4 ethylene dioxythiophene waste in aluminum electrolytic capacitor plants has become an important topic. About 3-4 tons of monomer ethanol solution can be prepared by diluting about 0.5 ton-1.5 ton of 3,4 ethylene dioxythiophene with ethanol in a capacitor factory for one month, and 1 ton of 3,4 ethylene dioxythiophene. In the use process of the monomer solution, along with the absorption of water vapor in the air by ethanol, the water vapor can influence the polymerization reaction of the monomer and the oxidant to influence the capacitance characteristic, so that the electrolytic capacitance factory generates a plurality of waste 3,4 ethylene dioxythiophene monomer ethanol solutions. The 3,4 ethylene dioxythiophene organic waste in the electrolytic capacitor factory is currently discarded by the environmental protection company, but a large amount of organic waste causes the rise of transportation, discarding and other costs. The cost of single waste input into the aluminum electrolytic capacitor factory in one year is increased year by year along with the yield and environmental protection factors. Therefore, how to effectively reduce the generation of 3,4 ethylene dioxythiophene monomer waste liquid becomes a primary target which is unprecedented in electrolytic capacitor factories.
Summary of the invention
Based on this, it is necessary to provide a method for recovering and treating monomer waste liquid of a solid aluminum electrolytic capacitor, which is used for solving the problems in the prior art that the monomer waste liquid is used for inhibiting self-polymerization and reaction of monomers by using an alkali neutralizer, 3,4 ethylene dioxythiophene is separated and extracted, the 3,4 ethylene dioxythiophene with high purity is recovered for reuse, and about 98.5% of monomer and ethanol can be recovered, so that the reduction of the monomer waste liquid accords with the national environmental protection policy, and the effects of energy conservation and emission reduction are achieved.
The invention solves the technical problems by adopting the following technical scheme:
a monomer waste liquid recovery treatment method of a solid aluminum electrolytic capacitor is characterized in that an alkali neutralizer is used for inhibiting self-polymerization and reaction of monomers in the monomer waste liquid;
separating ethanol and monomers in the wastewater by reduced pressure distillation;
the separated monomer is washed by pure water and extracted;
purifying the extracted monomer by a rectifying tower, and recovering to obtain more than 98.5 percent of monomer.
Further, the monomer waste liquid is 3,4 ethylene dioxythiophene monomer ethanol solution, and the monomer is 3,4 ethylene dioxythiophene monomer.
Further, the distillation temperature of the reduced pressure distillation is 80-120 ℃, and the vacuum value is 0.6-1.1mpa.
Further, the purification temperature of the rectifying tower is 180-220 ℃, and the vacuum value is 0.6-1.1mpa.
Further, the alkali neutralizer is one or more of ammonia water, sodium hydroxide, monoethanolamine, diethanolamine, triethanolamine and N, N dimethylacetamide.
Further, the pH value of the 3,4 ethylene dioxythiophene monomer ethanol solution is regulated to be between 6 and 10.
Further, the addition amount of the alkali neutralizer is 1-10% of the 3,4 ethylene dioxythiophene monomer ethanol solution by mass.
Further, the processing and method includes the steps of:
and 1, separating the 3, 4-ethylenedioxythiophene from impurities by adopting a PP cotton filter element.
And 2, adding strong alkali into the 3,4 ethylene dioxythiophene ethanol solution for neutralization, and adjusting the pH value of the solution to 6-10.
And 3, separating the 3,4 ethylene dioxythiophene and ethanol mixed solution by reduced pressure distillation to remove the mixture of ethanol and water.
And 4, cleaning the separated 3, 4-ethylenedioxythiophene with pure water to remove impurities and strong alkali in the solution.
And 5, separating pure water and monomers from the cleaned 3, 4-ethylenedioxythiophene by using a separating funnel.
And 6, rectifying the separated 3, 4-ethylenedioxythiophene to obtain a monomer with the high purity of more than 98.5%.
The invention has the advantages and positive effects that. The invention relates to a monomer waste liquid recovery treatment method of a solid aluminum electrolytic capacitor, which is used for solving the problems in the prior art that an alkali neutralizer is used in the monomer waste liquid to inhibit self-polymerization and reaction of monomers, 3,4 ethylene dioxythiophene is separated and extracted, the 3,4 ethylene dioxythiophene with high purity is recovered for reuse, and about 98.5 percent of monomers and ethanol can be recovered, so that the reduction of the monomer waste liquid accords with the national environmental protection policy, and the effects of energy conservation and emission reduction are achieved. Compared with the prior art, the invention has the following advantages:
1. according to the invention, the alkali neutralizer is added into the 3,4 ethylene dioxythiophene monomer ethanol solution to inhibit monomer self-polymerization and reaction, and the monomer self-polymerization and reaction are separated by reduced pressure distillation and purified by a rectifying tower, so that about 98.5% of monomer and ethanol can be recovered for reuse. The production of 3,4 ethylene dioxythiophene monomer waste liquid of an electrolytic capacitor factory is reduced, the monomer and the ethanol are separated due to the simplicity of a monomer formula, the 3,4 ethylene dioxythiophene with high purity is recovered for reuse, the cost of the whole recovery equipment and the field construction is lower than the cost of the 3,4 ethylene dioxythiophene scrapped and treated in each month of the electrolytic capacitor factory, and the 3,4 ethylene dioxythiophene and the ethanol can be separated in the whole process, so that the purposes of saving waste and reducing emission are achieved. The reduction of monomer waste liquid meets the national environmental protection policy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic flow chart of the wastewater recovery treatment and method of the present invention.
Detailed Description
Embodiments of the present invention will be described in further detail with reference to the accompanying drawings: the following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in figure 1, the monomer waste liquid recovery treatment method of the solid aluminum electrolytic capacitor is characterized in that in the monomer waste liquid, an alkali neutralizer is used for inhibiting self-polymerization and reaction of monomers;
separating ethanol and monomers in the wastewater by reduced pressure distillation;
the separated monomer is washed by pure water and extracted;
purifying the extracted monomer by a rectifying tower, and recovering to obtain more than 98.5 percent of monomer.
Firstly, filtering to remove impurities, separating 3,4 ethylene dioxythiophene monomer ethanol solution from impurities by adopting a PP cotton filter element, wherein the waste water generally contains 3,4 ethylene dioxythiophene monomer, ethanol and other impurities, and filtering and removing large-particle impurities by adopting the PP cotton filter element to obtain filtrate for filtering filter residues, so that the filtrate is convenient to recover and separate, and the inconvenience of purifying and recovering waste liquid of the 3,4 ethylene dioxythiophene monomer and the ethanol caused by the filter residues is avoided.
In the monomer waste liquid, an alkali neutralizer is used for inhibiting self-polymerization and reaction of the monomer. The addition amount of the alkali neutralizer is 1-10% of the 3,4 ethylene dioxythiophene monomer ethanol solution. The 3,4 ethylene dioxythiophene monomer ethanol solution can generate self-polymerization reaction under the acidic condition, the single molecular structure can be converted into a dimer or a trimer, and then the dimer or the trimer can be changed into a long-chain conductive polymer by continuous heating, and the recovery of the 3,4 ethylene dioxythiophene monomer ethanol solution can be reduced.
The 3,4 ethylene dioxythiophene monomer ethanol solution is heated under alkaline conditions, so that the 3,4 ethylene dioxythiophene monomer can be inhibited from generating self-polymerization reaction, the single molecular structure can be inhibited from being converted into a dimer or a trimer and then becomes a long-chain conductive polymer due to continuous heating, so that an alkali neutralizer is added to inhibit the self-polymerization and reaction of the monomer, more 3,4 ethylene dioxythiophene monomer can be recovered through separation, and the scrapped monomer can be recovered to the maximum extent by adding alkaline substances to neutralize and inhibit the polymerization reaction of the 3,4 ethylene dioxythiophene monomer. The recovery efficiency is improved, the content of 3,4 ethylene dioxythiophene monomers in the wastewater is reduced, and the effects of energy conservation and emission reduction are achieved.
Ethanol and monomers in the wastewater are separated by reduced pressure distillation. Because the boiling point of the 3,4 ethylene dioxythiophene monomer is higher, when the 3,4 ethylene dioxythiophene monomer is distilled under normal pressure, the phenomenon of decomposition, oxidization or polymerization occurs when the temperature is raised and the boiling point is not reached, so that the normal pressure distillation cannot be adopted, the reduced pressure distillation is used, the pressure in the system is reduced, the boiling point of the liquid is reduced, the phenomenon of decomposition, oxidization or polymerization is avoided, the 3,4 ethylene dioxythiophene is separated from the ethanol solution by adopting the reduced pressure distillation, and the mixture of ethanol and water is removed. The reduced pressure distillation is favorable for separating impurities and impurities, and the reduced pressure distillation is used for separating or purifying 3, 4-ethylenedioxythiophene monomer and ethanol, so that the separation recovery rate is improved.
The monomers were separated off, washed with pure water and extracted. And (3) cleaning the separated 3, 4-ethylenedioxythiophene with pure water to remove impurities and strong alkali in the solution. The purer 3,4 ethylene dioxythiophene is obtained.
And separating pure water and monomers from the washed 3, 4-ethylenedioxythiophene by using a separating funnel. And (3) purifying and separating the pure water from the 3, 4-ethylenedioxythiophene to obtain the 3, 4-ethylenedioxythiophene with a certain concentration.
Purifying the extracted 3, 4-ethylenedioxythiophene monomer by a rectifying tower, and recovering to obtain more than 98.5 percent of monomer. The volatilization of the 3, 4-ethylene dioxythiophene monomer can be reduced by rectification, and the 3, 4-ethylene dioxythiophene monomer with higher purity is obtained, so that the recovery efficiency is improved.
The invention is further described below with reference to specific examples.
Example 1
Step 1, 20 kg of 29% 3,4 ethylene dioxythiophene monomer ethanol solution is taken, and a PP cotton filter core is used for filtering impurities.
And 2, adding 10g of sodium hydroxide into the filtered 3, 4-ethylenedioxythiophene monomer solution, and uniformly stirring to obtain the pH of 6.4.
Step 3, evaporating by using 50L rotary distillation at a distillation temperature of 100 ℃ and a vacuum value of 0.8mpa, and separating the monomer from ethanol to obtain 5.56 kg of 3, 4-ethylenedioxythiophene raffinate.
And 4, cleaning 5.56 kg of 3,4 ethylene dioxythiophene residual liquid with pure water, and cleaning the 3,4 ethylene dioxythiophene. About 5.6 kg of crude 3, 4-ethylenedioxythiophene is obtained by extraction.
And 5, placing the 3, 4-ethylenedioxythiophene crude product into a rectifying tower, refining the crude product at the rectifying temperature of 200 ℃ and the vacuum value of 0.8mpa, rectifying 4.6kg of clear and transparent 3, 4-ethylenedioxythiophene, and recovering 82% of 3, 4-ethylenedioxythiophene monomers by gas chromatography.
Example 2
Step 1, 20 kg of 29% 3,4 ethylene dioxythiophene monomer ethanol solution is taken, and a PP cotton filter core is used for filtering impurities.
And 2, adding 15g of ammonia water into the filtered 3, 4-ethylenedioxythiophene monomer solution, and uniformly stirring to obtain the pH value of 8.6.
Step 3, evaporating by using 50L rotary distillation at 80 ℃ and vacuum value of 0.6mpa, and separating the monomer from ethanol to obtain 5.61 kg of 3, 4-ethylenedioxythiophene raffinate.
And 4, cleaning 5.61 kg of 3,4 ethylene dioxythiophene residual liquid with pure water, and cleaning the 3,4 ethylene dioxythiophene with ammonia water. About 5.5 kg of crude 3, 4-ethylenedioxythiophene is obtained by extraction.
And 5, placing the 3,4 ethylene dioxythiophene crude product into a rectifying tower, refining the crude product at the rectifying temperature of 210 ℃ and the vacuum value of 0.6mpa, rectifying 5.1kg of clear and transparent 3,4 ethylene dioxythiophene, detecting the purity of 99.61% by gas chromatography, and recovering 93% of 3,4 ethylene dioxythiophene monomers.
Example 3
Step 1, 20 kg of 29% 3,4 ethylene dioxythiophene monomer ethanol solution is taken, and a PP cotton filter core is used for filtering impurities.
And 2, adding 20g of sodium hydroxide into the filtered 3, 4-ethylenedioxythiophene monomer solution, and uniformly stirring to obtain the pH value of 9.9.
Step 3, evaporating by using 50L rotary distillation at a distillation temperature of 100 ℃ and a vacuum value of 0.8mpa, and separating the monomer from ethanol to obtain 5.58 kg of 3, 4-ethylenedioxythiophene raffinate.
And 4, cleaning 5.58 kg of 3,4 ethylene dioxythiophene residual liquid with pure water, and cleaning the 3,4 ethylene dioxythiophene containing sodium hydroxide. About 5.5 kg of crude 3, 4-ethylenedioxythiophene is obtained by extraction.
And 5, placing the 3, 4-ethylenedioxythiophene crude product into a rectifying tower, refining the crude product at the rectifying temperature of 200 ℃ and the vacuum value of 1.1mpa, rectifying 5.4kg of clear and transparent 3, 4-ethylenedioxythiophene, detecting the purity of 99.59% by gas chromatography, and recovering 98% of 3, 4-ethylenedioxythiophene monomers.
Example 4
Step 1, 20 kg of 29% 3,4 ethylene dioxythiophene monomer ethanol solution is taken, and a PP cotton filter core is used for filtering impurities.
Step 2, adding 20g of N, N-dimethylacetamide into the filtered 3,4 ethylene dioxythiophene monomer solution, and uniformly stirring to obtain the pH of 7.4.
Step 3, evaporating by using 50L rotary distillation at 90 ℃ and vacuum value of 0.8mpa, and separating the monomer from ethanol to obtain 5.58 kg of 3,4 ethylene dioxythiophene raffinate.
And 4, cleaning 5.58 kg of 3,4 ethylene dioxythiophene residual liquid with pure water, and cleaning the 3,4 ethylene dioxythiophene containing N, N dimethylacetamide. About 5.4kg of crude 3, 4-ethylenedioxythiophene is obtained by extraction.
And 5, placing the 3, 4-ethylenedioxythiophene crude product into a rectifying tower, refining the crude product at the rectifying temperature of 200 ℃ and the vacuum value of 1.1mpa, rectifying 5.2kg of clear and transparent 3, 4-ethylenedioxythiophene, detecting the purity of 99.23% by gas chromatography, and recovering 96% of 3, 4-ethylenedioxythiophene monomers.
Comparative example 1
Step 1, 20 kg of 29% 3,4 ethylene dioxythiophene monomer ethanol solution is taken, and a PP cotton filter core is used for filtering impurities.
Step 2, the filtered 3,4 ethylene dioxythiophene monomer solution has a pH of 4.9.
Step 3, evaporating by using 50L rotary distillation at a distillation temperature of 100 ℃ and a vacuum value of 0.8mpa, and separating the monomer from ethanol to obtain 5.56 kg of 3, 4-ethylenedioxythiophene raffinate.
And 4, cleaning 5.56 kg of 3,4 ethylene dioxythiophene residual liquid with pure water, and cleaning the 3,4 ethylene dioxythiophene. About 5.5 kg of crude 3, 4-ethylenedioxythiophene is obtained by extraction.
And 5, placing the 3,4 ethylene dioxythiophene crude product into a rectifying tower, refining the crude product at the rectifying temperature of 200 ℃ and the vacuum value of 0.8mpa, rectifying 1.5kg of clear and transparent 3,4 ethylene dioxythiophene, and recovering 27% of 3,4 ethylene dioxythiophene monomers by gas chromatography.
Comparative example 2
Comparative example 2 is different from example 1 in that 10g of sodium hydroxide was added in step 2 of example 1, and 2g of sodium hydroxide was added in step 2 of comparative example 2, except that the weight of added sodium hydroxide was different, and the conditions were the same as in example 1. As a result, the purity of the gas chromatography was 93.62%, and 43% of the 3, 4-ethylenedioxythiophene monomer was recovered.
The test results are shown in Table I: EDOT is an abbreviation for 3,4 ethylene dioxythiophene in the table.
| Examples | Recovery (kg) | Addition amount of alkali neutralizing agent (g) | EDOT ethanol solution PH | Pure water extraction quantity (kg) | Rectification unit (kg) | Recovery rate |
| Example 1 | 20 | 10g sodium hydroxide | 6.4 | 5.6 | 4.6 | 82％ |
| Example 2 | 20 | 15g ammonia water | 8.6 | 5.5 | 5.1 | 93％ |
| Example 3 | 20 | 20g sodium hydroxide | 9.9 | 5.5 | 5.4 | 98.％ |
| Example 4 | 20 | 10g N N-dimethylacetamide | 7.4 | 5.4 | 5.2 | 96％ |
| Comparative example 1 | 20 | 0g | 4.9 | 5.5 | 1.5 | 27％ |
| Comparative example 2 | 20 | 2g sodium hydroxide | 5.2 | 5.4 | 2.3 | 43％ |
The 3,4 ethylene dioxythiophene monomer ethanol solution can generate self-polymerization reaction under the acidic condition, the single molecular structure can be converted into a dimer or a trimer, and then the dimer or the trimer can be changed into a long-chain conductive polymer by continuous heating, and the recovery of the 3,4 ethylene dioxythiophene monomer ethanol solution can be reduced. Therefore, the scrapped monomers can be recovered to the maximum extent only by adding alkaline substances to neutralize and inhibit EDOT polymerization reaction.
It can be seen from examples 1 to 3 that sodium hydroxide, ammonia water, and N, N dimethylacetamide were added, respectively, and the addition amounts were gradually increased, and the recovery rate finally obtained was also gradually increased. And in the comparative examples 1 and two, no alkali neutralizing agent or little alkali neutralizing agent is added, the recovery rate finally obtained is obviously lower, which means that the proper addition of the alkali neutralizing agent in a certain range can inhibit the self-polymerization and reaction of the monomers and can improve the recovery rate of the monomers.
It should be emphasized that the examples described herein are illustrative rather than limiting, and therefore the invention is not limited to the examples described in the detailed description, but rather falls within the scope of the invention as defined by other embodiments derived from the technical solutions of the invention by those skilled in the art.
Claims (6)
1. A monomer waste liquid recovery treatment method of a solid aluminum electrolytic capacitor is characterized in that an alkali neutralizer is used for inhibiting self-polymerization and reaction of monomers in the monomer waste liquid;
separating ethanol and monomers in the wastewater by reduced pressure distillation;
the separated monomer is washed by pure water and extracted;
purifying the extracted monomer by a rectifying tower, and recovering to obtain more than 98.5 percent of monomer;
the monomer waste liquid is 3,4 ethylene dioxythiophene monomer ethanol solution, and the monomer is 3,4 ethylene dioxythiophene monomer;
the addition amount of the alkali neutralizer is 1-10% of the 3,4 ethylene dioxythiophene monomer ethanol solution by mass.
2. The method for recycling monomer waste liquid of the solid aluminum electrolytic capacitor according to claim 1, which is characterized in that: the distillation temperature of the reduced pressure distillation is 80-120 ℃, and the vacuum value is 0.6-1.1mpa.
3. The method for recycling monomer waste liquid of the solid aluminum electrolytic capacitor according to claim 1, which is characterized in that: the purification temperature of the rectifying tower is 180-220 ℃, and the vacuum value is 0.6-1.1mpa.
4. The method for recycling monomer waste liquid of the solid aluminum electrolytic capacitor according to claim 1, which is characterized in that: the alkali neutralizer is one or more of ammonia water, sodium hydroxide, monoethanolamine, diethanolamine, triethanolamine and N, N-dimethylacetamide.
5. The method for recycling monomer waste liquid of the solid aluminum electrolytic capacitor according to claim 1, which is characterized in that: the pH value of the 3,4 ethylene dioxythiophene monomer ethanol solution is regulated to be between 6 and 10.
6. The method for recycling monomer waste liquid of the solid aluminum electrolytic capacitor according to claim 1, which is characterized in that: the processing and method comprises the following steps:
step 1, separating 3,4 ethylene dioxythiophene from impurities by adopting a PP cotton filter element;
step 2, adding strong alkali into the 3,4 ethylene dioxythiophene ethanol solution to neutralize, and adjusting the pH value of the solution to 6-10;
step 3, separating the 3,4 ethylene dioxythiophene and ethanol mixed solution by reduced pressure distillation to remove the mixture of ethanol and water;
step 4, cleaning the separated 3,4 ethylene dioxythiophene with pure water to remove impurities and strong alkali in the solution;
step 5, separating pure water and monomers from the cleaned 3, 4-ethylenedioxythiophene by using a separating funnel;
and 6, rectifying the separated 3, 4-ethylenedioxythiophene to obtain a monomer with the high purity of more than 98.5%.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102775423A (en) * | 2012-07-23 | 2012-11-14 | 上海羽涵医药开发有限公司 | Method for preparing polymer monomer 3,4-ethylenedioxythiophene |
| CN112679011A (en) * | 2020-11-24 | 2021-04-20 | 厦门大学 | Method for treating electrochemical wastewater containing EDOT and recycling resources |
| CN112919666A (en) * | 2019-12-05 | 2021-06-08 | 惠州市宙邦化工有限公司 | Method for treating wastewater containing PEDOT/PSS |
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| KR100525977B1 (en) * | 2002-11-19 | 2005-11-03 | 나노캠텍주식회사 | Method for producing 3,4-alkylenedioxythiophenes and 3,4-dialkoxythiophenes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102775423A (en) * | 2012-07-23 | 2012-11-14 | 上海羽涵医药开发有限公司 | Method for preparing polymer monomer 3,4-ethylenedioxythiophene |
| CN112919666A (en) * | 2019-12-05 | 2021-06-08 | 惠州市宙邦化工有限公司 | Method for treating wastewater containing PEDOT/PSS |
| CN112679011A (en) * | 2020-11-24 | 2021-04-20 | 厦门大学 | Method for treating electrochemical wastewater containing EDOT and recycling resources |
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Address after: 518106 workshop A102 (No. 4132, Songbai Road), Fengbin Industrial Park, Tangwei community, Fenghuang street, Guangming District, Shenzhen City, Guangdong Province Applicant after: Fengbin Electronic Technology Co.,Ltd. Address before: 518106 workshop A102 (No. 4132, Songbai Road), Fengbin Industrial Park, Tangwei community, Fenghuang street, Guangming District, Shenzhen City, Guangdong Province Applicant before: CAPXON ELECTRONIC (SHEN ZHEN) Co.,Ltd. |
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