CN115612172A - Wind power blade recovery method based on metal ionic liquid catalytic degradation - Google Patents
Wind power blade recovery method based on metal ionic liquid catalytic degradation Download PDFInfo
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- CN115612172A CN115612172A CN202211299734.5A CN202211299734A CN115612172A CN 115612172 A CN115612172 A CN 115612172A CN 202211299734 A CN202211299734 A CN 202211299734A CN 115612172 A CN115612172 A CN 115612172A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/28—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic compounds containing nitrogen, sulfur or phosphorus
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
- C08J2363/02—Polyglycidyl ethers of bis-phenols
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- 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
- Y02W30/62—Plastics recycling; Rubber recycling
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Abstract
The invention discloses a wind power blade recovery method based on metal ionic liquid catalytic degradation, which comprises the following steps: cutting the waste wind power blade with the metal component removed into blocks; then placing the mixture into a mixed solution of metal ionic liquid and an ethanol solvent, carrying out catalytic degradation reaction at 150-170 ℃ under inert atmosphere, and filtering and recovering the reinforced fiber after degradation is finished; wherein the metal ion liquid is any one of 1-butyl-3-methylimidazole chlorozincate, 1-butyl-3-methylimidazole chloroferrite and 1-butyl-3-methylimidazole chloroaluminate. According to the wind power blade recovery method, the metal ionic liquid is used as the catalyst in the wind power blade degradation reaction, the catalytic degradation of the wind power blade matrix resin can be realized under a mild condition (150-170 ℃), the reinforcing fiber can be recovered, and the recovery method is low in energy consumption and cost and small in heat damage of the recovered fiber.
Description
Technical Field
The invention belongs to the technical field of solid waste treatment, and particularly relates to a wind power blade recovery method based on catalytic degradation of a metal ionic liquid.
Background
The retired wind power blade is a novel industrial solid waste which appears in recent years, is mainly made of bisphenol A epoxy resin composite materials, is three-dimensionally crosslinked, difficult to degrade and high in added value, belongs to white garbage, can cause environmental pollution and can waste resources if not treated properly, and therefore the processing method of the retired wind power blade becomes a hot point concerned by the wind power industry.
At present, a common treatment method for retired wind power blades is thermal degradation, namely polymer chains of matrix resin are randomly broken under the heating action, so that the matrix resin can be broken and degraded only by needing high enough temperature (more than or equal to 850 ℃), and then the matrix resin is converted into gaseous micromolecular compounds to recover reinforcing fibers with high added values, and resource utilization is realized. However, the method has the defects of high energy consumption, large thermal damage of recycled fibers and the like when the waste blades are treated, so that the development of a novel degradation technology has important significance for recycling the wind power blades.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a wind power blade recovery method based on metal ion liquid catalytic degradation. The recovery method effectively reduces the energy consumption of the related technology, has high quality of the recovered fiber, and has wide application prospect in the field of waste wind power blade recovery.
The embodiment of the invention provides a wind power blade recovery method based on metal ionic liquid catalytic degradation, which comprises the following steps:
(1) Cutting the waste wind power blade with the metal component removed into blocks;
(2) Placing the wind power blade cut into blocks in a mixed solution of metal ionic liquid and an ethanol solvent, performing catalytic degradation reaction at 150-170 ℃ in an inert atmosphere, and filtering and recovering the reinforcing fiber after degradation is finished; wherein the metal ionic liquid is any one of 1-butyl-3-methylimidazole chlorozincate, 1-butyl-3-methylimidazole chloroferrite and 1-butyl-3-methylimidazole chloroaluminate.
According to the wind power blade recovery method, the metal ionic liquid is used as a catalyst in the wind power blade degradation reaction and can be complexed with heteroatoms (O and N) in a polymer chain of the matrix resin, so that the polymer chain can be broken at specific bond positions (C-N bonds and C-O bonds) at a relatively low temperature (150-170 ℃), the three-dimensional cross-linked structure of the matrix resin is degraded, and the reinforced fibers are recovered. Therefore, the wind power blade recovery method provided by the embodiment of the invention is low in energy consumption and high in quality of recovered fibers.
In some embodiments of the present invention, the metal ion liquid accounts for 10% to 20% of the ethanol solvent by mass.
In some embodiments of the invention, the reaction time of the catalytic degradation reaction is 3 to 4 hours.
In some embodiments of the invention, the metal ionic liquid is prepared by a method comprising: under the protection of nitrogen, weighing 1-butyl-3-methylimidazole chloride and metal chloride according to the molar ratio of 1:1, and stirring and reacting at room temperature for 12 hours to obtain the metal ionic liquid; wherein the metal chloride is any one of zinc chloride, ferric chloride or aluminum chloride.
In some embodiments of the invention, the 1-butyl-3-methylimidazolium chloride salt is prepared by a process comprising the steps of: dissolving 2moL of N-methylimidazole in toluene, adding 2.2moL of N-butyl chloride, and stirring and reacting at 75 ℃ for 48 hours; after the reaction is finished, cooling the reaction product to 0 ℃, freezing for 2 hours, carrying out solid-liquid separation on the reaction product, and rinsing the solid with acetone to obtain the 1-butyl-3-methylimidazole chloride salt.
In some embodiments of the invention, the inert atmosphere is a nitrogen atmosphere.
In some embodiments of the present invention, the catalytic degradation reaction is performed in a high pressure reaction vessel, and the reaction vessel is closed after the air in the reaction vessel is replaced with nitrogen.
In some embodiments of the invention, the sizes of the waste wind power blades cut into blocks are as follows: the length multiplied by the width is less than or equal to 5cm multiplied by 5cm.
The invention has the following advantages and beneficial effects:
(1) According to the recovery method of the wind power blade, disclosed by the embodiment of the invention, the metal ionic liquid is used as the catalyst in the degradation reaction of the wind power blade, so that the C-N bond and the C-O bond in the matrix resin of the wind power blade can be promoted to be broken under a mild condition (150-170 ℃), the catalytic degradation of the matrix resin of the wind power blade is realized, and further the reinforced fiber can be recovered.
(2) The metal ion liquid and the ethanol solvent used in the wind power blade recovery method are green and pollution-free; and the waste wind power blades can be recycled, so that the recovery cost of the waste wind power blades is further reduced, and the secondary environmental pollution generated in the recovery process can be reduced.
(3) The wind power blade recovery method provided by the embodiment of the invention has the characteristics of simple process, no special operation, low energy consumption, no pollution, easiness in engineering implementation, wide application range and wide application prospect, and the equipment required by catalytic degradation is traditional industrial equipment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
The embodiment of the invention provides a wind power blade recovery method based on metal ionic liquid catalytic degradation, which comprises the following steps:
(1) Cutting the waste wind power blade with the metal component removed into blocks;
(2) Placing the wind power blade cut into blocks in a mixed solution of metal ionic liquid and an ethanol solvent, performing catalytic degradation reaction at 150-170 ℃ in an inert atmosphere, and filtering and recovering the reinforcing fiber after degradation is finished;
wherein the metal ion liquid is any one of 1-butyl-3-methylimidazole chlorozincate, 1-butyl-3-methylimidazole chloroferrite and 1-butyl-3-methylimidazole chloroaluminate.
The matrix resin of the wind power blade is generally bisphenol A epoxy resin, and a molecular chain contains a large number of C-N bonds and C-O bonds. Therefore, the wind power blade recovery method provided by the embodiment of the invention has the advantages of low energy consumption and small thermal damage of the recovered fiber.
In some embodiments of the invention, the metal ion liquid accounts for 10-20% of the ethanol solvent by mass. Non-limiting examples are: the mass percentage of the metal ion liquid is 10%, 10.5%, 12%, 12.3%, 13.4%, 14.5%, 15%, 18.5%, 19.1%, 20% and the like.
In some embodiments of the invention, the reaction time for the catalytic degradation reaction is 3 to 4 hours. Non-limiting examples are: 3h, 3.2h, 3.3h, 3.5h, 3.8h, 4.0h and the like.
In some embodiments of the invention, the inert atmosphere is a nitrogen atmosphere.
In some embodiments of the invention, the catalytic degradation reaction is carried out in a high pressure reactor, and the reactor is closed after the air in the reactor is replaced with nitrogen.
In some embodiments of the invention, the sizes of the waste wind power blades cut into blocks are as follows: the length multiplied by the width is less than or equal to 5cm multiplied by 5cm. Non-limiting examples are: the size of the waste wind power blade can be cut into, for example, length × width =5cm × 5cm, 4cm × 4cm, 3cm × 3cm, 2cm × 2cm, 1cm × 1cm, and the like.
In embodiments 1 to 3 of the present invention, 1-butyl-3-methylimidazolium chlorozincate is used as a catalyst in a degradation reaction of a wind turbine blade, and the catalyst is prepared by a method comprising the following steps: under the protection of nitrogen, 2moL of N-methylimidazole is added into toluene to be fully dissolved, 2.2moL of N-butyl chloride is added, and the mixture is stirred and reacted for 48 hours at the temperature of 75 ℃; after the reaction is finished, cooling the reaction product to 0 ℃, freezing for 2 hours, carrying out solid-liquid separation on the reaction product, and rinsing the solid with acetone for three times to obtain 1-butyl-3-methylimidazolium chloride; then weighing 1-butyl-3-methylimidazole chlorine salt and zinc chloride according to the mol ratio of 1:1, and stirring and reacting for 12 hours at room temperature to obtain the 1-butyl-3-methylimidazole chlorine zincate.
In the embodiments 4 to 5 of the present invention, 1-butyl-3-methylimidazol chloro ferrite is used as a catalyst in the degradation reaction of the wind turbine blade, and the catalyst is prepared by a method comprising the following steps: under the protection of nitrogen, 2moL of N-methylimidazole is added into toluene to be fully dissolved, 2.2moL of N-butyl chloride is added, and the mixture is stirred and reacted for 48 hours at the temperature of 75 ℃; after the reaction is finished, cooling the reaction product to 0 ℃, freezing for 2 hours, carrying out solid-liquid separation on the reaction product, and rinsing the solid with acetone for three times to obtain 1-butyl-3-methylimidazolium chloride; then 1-butyl-3-methylimidazolium chloride and ferric chloride are weighed according to the molar ratio of 1:1, and stirred and reacted for 12 hours at room temperature to prepare the 1-butyl-3-methylimidazolium chloride ferrite.
In embodiments 6 to 7 of the present invention, 1-butyl-3-methylimidazolium chloroaluminate is used as a catalyst in a degradation reaction of a wind turbine blade, and the catalyst is prepared by a method comprising the following steps: under the protection of nitrogen, 2moL of N-methylimidazole is added into toluene to be fully dissolved, 2.2moL of N-butyl chloride is added, and the mixture is stirred and reacted for 48 hours at the temperature of 75 ℃; after the reaction is finished, cooling the reaction product to 0 ℃, freezing for 2 hours, carrying out solid-liquid separation on the reaction product, and rinsing the solid with acetone for three times to obtain 1-butyl-3-methylimidazolium chloride; then weighing 1-butyl-3-methylimidazole chloride and aluminum chloride according to the mol ratio of 1:1, and stirring and reacting for 12 hours at room temperature to obtain the 1-butyl-3-methylimidazole chloroaluminate.
The following are non-limiting examples of the invention and comparative examples, which are to be construed as follows: the solution of the comparative example is not prior art, is provided only for comparison with the solution of the example, and is not intended as a limitation of the present invention.
The recovery effect of examples 1 to 7 of the present invention and comparative example 1 was evaluated by the purity of the recovered fiber and the strength retention rate of the recovered fiber.
The content of the resin in the recycled fiber is analyzed by a Mettler Toledo type pyrolysis gravimetric analyzer, and the lower the content of the resin, the more sufficient the resin in the blade is degraded, and the higher the purity of the fiber is.
The tensile strength of the recycled fiber is measured by a LLY-06E type tensile testing machine, the ratio of the tensile strength to the fibril strength represents the strength retention rate of the recycled fiber, and the greater the retention rate, the less the damage of the degradation process to the recycled fiber is.
The raw materials of the examples of the present invention and comparative examples, unless otherwise specified, are commercially available materials; the experimental methods in which specific conditions are not specified in the examples of the present invention are conventional methods and conventional conditions well known in the art. The technical solution of the present invention will be further described in detail with reference to the following specific examples.
Example 1
A wind power blade recovery method based on metal ionic liquid catalytic degradation comprises the following steps:
(1) Cutting the waste wind power blade with the metal component removed into blocks (100 g) with the length multiplied by the width =5cm multiplied by 5 cm;
(2) Placing the wind power blade cut into blocks in a high-pressure reaction kettle with 500mL of ethanol and 1-butyl-3-methylimidazole chlorozincate (wherein the mass of the 1-butyl-3-methylimidazole chlorozincate accounts for 15.1% of that of the ethanol), replacing air in the kettle with nitrogen, sealing the reaction kettle, stirring at 160 ℃ for catalytic degradation for 3.5 hours, and filtering and recovering the reinforced fibers after the degradation is finished.
The purity of the reinforcing fiber recovered in example 1 was 97.1%, and the retention of the fiber strength was 96.6%.
Example 2
A wind power blade recovery method based on metal ionic liquid catalytic degradation comprises the following steps:
(1) Cutting the waste wind power blade with the metal component removed into blocks (100 g) with the length multiplied by the width =5cm multiplied by 5 cm;
(2) Placing the wind power blade cut into blocks in a high-pressure reaction kettle with 500mL of ethanol and 1-butyl-3-methylimidazole chlorozincate (wherein the mass of the 1-butyl-3-methylimidazole chlorozincate accounts for 10.5 percent of that of the ethanol), replacing the air in the kettle with nitrogen, sealing the reaction kettle, stirring at 168 ℃ for catalytic degradation for 3.1h, and filtering and recovering the reinforced fibers after the degradation is finished.
The purity of the reinforcing fiber recovered in example 2 was 96.5%, and the retention of the fiber strength was 95.2%.
Example 3
A wind power blade recovery method based on metal ionic liquid catalytic degradation comprises the following steps:
(1) Cutting the waste wind power blade with the metal component removed into blocks (100 g) with the length multiplied by the width =5cm multiplied by 5 cm;
(2) Placing the wind power blade cut into blocks in a high-pressure reaction kettle with 500mL of ethanol and 1-butyl-3-methylimidazole chlorozincate (wherein the mass of the 1-butyl-3-methylimidazole chlorozincate accounts for 19.7 percent of that of the ethanol), replacing the air in the kettle with nitrogen, sealing the reaction kettle, stirring and catalytically degrading at 152 ℃ for 3.8 hours, and filtering and recovering the reinforced fibers after the degradation is finished.
The purity of the reinforcing fiber recovered in example 3 was 97.8%, and the retention of the fiber strength was 97.2%.
Example 4
A wind power blade recovery method based on metal ionic liquid catalytic degradation comprises the following steps:
(1) Cutting the waste wind power blade with the metal component removed into blocks (100 g) with the length multiplied by the width =5cm multiplied by 5 cm;
(2) Placing the wind power blade cut into blocks into a high-pressure reaction kettle with 500mL of ethanol and 1-butyl-3-methylimidazol chloro ferrite (wherein the 1-butyl-3-methylimidazol chloro ferrite accounts for 12.3% of the mass of the ethanol), replacing the air in the kettle with nitrogen, sealing the reaction kettle, stirring at 162 ℃ for catalytic degradation for 3.5h, and filtering and recovering the reinforced fibers after the degradation is finished.
The purity of the reinforcing fiber recovered in example 4 was 93.8%, and the retention of the fiber strength was 96.1%.
Example 5
A wind power blade recovery method based on metal ion liquid catalytic degradation comprises the following steps:
(1) Cutting the waste wind power blade with the metal component removed into blocks (100 g) with the length multiplied by the width =5cm multiplied by 5 cm;
(2) Placing the wind power blade cut into blocks into a high-pressure reaction kettle with 500mL of ethanol and 1-butyl-3-methylimidazolium chloride (wherein the mass of the 1-butyl-3-methylimidazolium chloride accounts for 18.5% of that of the ethanol), replacing air in the kettle with nitrogen, sealing the reaction kettle, stirring at 166 ℃ for catalytic degradation for 3.3 hours, and filtering and recovering the reinforced fibers after the degradation is finished.
The purity of the reinforcing fiber recovered in example 5 was 94.9%, and the retention of the fiber strength was 95.5%.
Example 6
A wind power blade recovery method based on metal ionic liquid catalytic degradation comprises the following steps:
(1) Cutting the waste wind power blade with the metal component removed into blocks (100 g) with the length multiplied by the width =5cm multiplied by 5 cm;
(2) Placing the wind power blades cut into blocks into a high-pressure reaction kettle with 500mL of ethanol and 1-butyl-3-methylimidazole chloroaluminate (wherein the mass of the 1-butyl-3-methylimidazole chloroaluminate accounts for 13.4% of the mass of the ethanol), replacing air in the kettle with nitrogen, sealing the reaction kettle, stirring and catalytically degrading at 170 ℃ for 3.2 hours, and filtering and recovering the reinforced fibers after degradation is finished.
The purity of the reinforcing fiber recovered in example 6 was 92.5%, and the retention of the fiber strength was 94.3%.
Example 7
A wind power blade recovery method based on metal ionic liquid catalytic degradation comprises the following steps:
(1) Cutting the waste wind power blade with the metal component removed into blocks (100 g) with the length multiplied by the width =5cm multiplied by 5 cm;
(2) Placing the wind power blade cut into blocks into a high-pressure reaction kettle with 500mL of ethanol and 1-butyl-3-methylimidazole chloroaluminate (wherein the mass of the 1-butyl-3-methylimidazole chloroaluminate accounts for 19.1% of the mass of the ethanol), replacing the air in the kettle with nitrogen, sealing the reaction kettle, stirring at 167 ℃, carrying out catalytic degradation for 3.3 hours, and filtering and recovering the reinforced fibers after the degradation is finished.
The purity of the reinforcing fiber recovered in example 7 was 93.4%, and the retention of the fiber strength was 95.0%.
Comparative example 1
A wind power blade recovery method comprises the following steps:
(1) Cutting the waste wind power blade with the metal component removed into blocks (100 g) with the length multiplied by the width =5cm multiplied by 5 cm;
(2) Placing the wind power blade cut into blocks in a high-pressure reaction kettle with 500mL of ethanol, replacing air in the kettle with nitrogen, sealing the reaction kettle, stirring at 170 ℃ for catalytic degradation for 4 hours, and filtering and recovering the reinforcing fiber after degradation.
The waste wind power blade matrix resin of the comparative example 1 only swells and is not obviously degraded, and fibers cannot be recycled.
The main reaction conditions and the recovery effects of examples 1 to 7 of the present invention and comparative example 1 are shown in Table 1.
TABLE 1 relevant Process parameters and recovery Effect of examples 1 to 7 and comparative example 1
As can be seen from Table 1, the recovery method of the embodiment of the invention has high purity of the recovered fiber, and the purity of the recovered fiber reaches more than 92%; the mechanical property of the recycled fiber is good, and the retention rate of the fiber strength can reach more than 94% of that of the original fiber.
Compared with the comparative example, the embodiment of the invention shows that when the catalytic degradation of the waste wind power blade is carried out in the ethanol solvent containing the metal ion liquid catalyst, the blade matrix resin is obviously degraded, and the recycled fiber with higher purity and strength is obtained. On the contrary, if the metal ionic liquid catalyst is not added, the blade only swells in the organic solvent, and is not obviously degraded, and the fiber can not be recycled, which further illustrates that the metal ionic liquid catalyst selected in the embodiment of the invention has a remarkable catalytic effect on the degradation of the blade matrix resin.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. A wind power blade recovery method based on metal ionic liquid catalytic degradation is characterized by comprising the following steps:
(1) Cutting the waste wind power blade with the metal component removed into blocks;
(2) Placing the wind power blade cut into blocks in a mixed solution of metal ionic liquid and an ethanol solvent, performing catalytic degradation reaction at 150-170 ℃ in an inert atmosphere, and filtering and recovering the reinforcing fiber after degradation is finished;
wherein the metal ionic liquid is any one of 1-butyl-3-methylimidazole chlorozincate, 1-butyl-3-methylimidazole chloroferrite and 1-butyl-3-methylimidazole chloroaluminate.
2. The wind power blade recovery method based on metal ionic liquid catalytic degradation of claim 1, wherein the metal ionic liquid accounts for 10-20% of the ethanol solvent by mass.
3. The wind power blade recovery method based on metal ionic liquid catalytic degradation according to claim 1, wherein the reaction time of the catalytic degradation reaction is 3-4 h.
4. The wind power blade recovery method based on metal ionic liquid catalytic degradation of claim 1, wherein the metal ionic liquid is prepared by a method comprising the following steps: under the protection of nitrogen, weighing 1-butyl-3-methylimidazole chloride and metal chloride according to the molar ratio of 1:1, and stirring and reacting for 12 hours at room temperature to obtain the metal ionic liquid; wherein the metal chloride is any one of zinc chloride, ferric chloride or aluminum chloride.
5. The method for recovering the wind power blade based on the catalytic degradation of the metal ionic liquid as claimed in claim 4, wherein the 1-butyl-3-methylimidazole chloride salt is prepared by a method comprising the following steps: dissolving 2moL of N-methylimidazole in toluene, adding 2.2moL of N-butyl chloride, and stirring and reacting at 75 ℃ for 48 hours; after the reaction is finished, cooling the reaction product to 0 ℃, freezing for 2 hours, carrying out solid-liquid separation on the reaction product, and rinsing the solid with acetone to obtain the 1-butyl-3-methylimidazole chloride salt.
6. The wind power blade recovery method based on metal ionic liquid catalytic degradation according to claim 1, wherein the inert atmosphere is a nitrogen atmosphere.
7. The wind power blade recovery method based on metal ionic liquid catalytic degradation as claimed in claim 1 or 6, wherein the catalytic degradation reaction is performed in a high-pressure reaction kettle, and after the air in the kettle is replaced by nitrogen, the reaction kettle is sealed.
8. The wind power blade recovery method based on metal ionic liquid catalytic degradation of claim 1, wherein the sizes of the waste wind power blades cut into blocks are as follows: the length multiplied by the width is less than or equal to 5cm multiplied by 5cm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102516594A (en) * | 2011-11-04 | 2012-06-27 | 中国科学院长春应用化学研究所 | Recovery method of thermosetting epoxy resin or composite material thereof |
| JP2012254400A (en) * | 2011-06-08 | 2012-12-27 | Kyoto Institute Of Technology | Fiber separation method |
| CN105153461A (en) * | 2015-10-13 | 2015-12-16 | 常州市宏发纵横新材料科技股份有限公司 | Epoxy resin composite material recycling process |
| CN113603929A (en) * | 2021-09-07 | 2021-11-05 | 广东电网有限责任公司 | Recovery method of epoxy resin composite material, obtained glass fiber and application thereof |
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2022
- 2022-10-24 CN CN202211299734.5A patent/CN115612172A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012254400A (en) * | 2011-06-08 | 2012-12-27 | Kyoto Institute Of Technology | Fiber separation method |
| CN102516594A (en) * | 2011-11-04 | 2012-06-27 | 中国科学院长春应用化学研究所 | Recovery method of thermosetting epoxy resin or composite material thereof |
| CN105153461A (en) * | 2015-10-13 | 2015-12-16 | 常州市宏发纵横新材料科技股份有限公司 | Epoxy resin composite material recycling process |
| CN113603929A (en) * | 2021-09-07 | 2021-11-05 | 广东电网有限责任公司 | Recovery method of epoxy resin composite material, obtained glass fiber and application thereof |
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