System for jointly preparing degradable plastic by coupling electro-catalytic hydrogenation with organic matter oxidation

Abstract

The utility model discloses a system for jointly preparing degradable plastics by coupling electro-catalytic hydrogenation with organic matter oxidation. The system comprises an electro-catalytic hydrogenation coupling organic matter oxidation reaction system, a product separation system and an organic matter monomer esterification system, the electro-catalytic hydrogenation coupling organic matter oxidation reaction system comprises a power supply mechanism, at least one electrochemical coupling reactor, a raw material storage mechanism and a product recovery mechanism, the product separation system comprises an anode product separation mechanism and a cathode product separation mechanism; the cathode and anode product separation mechanism is respectively communicated with the cathode and anode product recoverer; the organic matter monomer esterification system comprises an esterification reactor, and a liquid inlet of the esterification reactor is respectively communicated with the cathode product separation recoverer and the anode product separation recoverer. The device is wide in applicability, and a new thought is provided for the green synthesis field of preparing degradable plastic PBS through an electro-catalytic hydrogenation coupling organic matter oxidation system driven by renewable energy sources.

Description

Technical Field

[0001] The utility model belongs to the field of preparing green chemicals by efficiently utilizing renewable energy, and specifically relates to a system for preparing degradable plastics by coupling electrocatalytic hydrogenation with organic matter oxidation. Background Art

[0002] The accumulation of plastic waste poses a serious threat to the soil and marine environment. Recently, biodegradable polymer materials have attracted widespread attention as potential future alternatives. In particular, PBS (polybutylene succinate) is an ideal material with excellent mechanical properties and ductility, and can be used as a substitute for polyolefins. It is worth noting that the two important monomers in the preparation of PBS are 1,4-butanediol and succinic acid. These two important monomers are currently mostly prepared by thermal catalysis. However, the thermal catalytic route requires high temperature and high pressure conditions and requires the provision of an additional hydrogen source, which not only pollutes the environment but also poses a safety hazard.

[0003] In recent years, active hydrogen and active oxygen, key intermediates in electrocatalytic systems driven by renewable energy sources such as solar energy, can be utilized for the oxidation and reduction of organic matter, providing a new, green approach for the production of high-value-added chemicals. 1,4-Butynediol, prepared from acetylene and acetaldehyde, has an annual demand of 1.5 million tons in my country. It can be reduced in situ using active hydrogen in water to produce the commodity chemical 1,4-butanediol, a key monomer in biodegradable plastic (PBS). 1,4-Butanediol can also be further oxidized in situ using active oxygen in water to produce succinic acid (another monomer in biodegradable plastic). The product can then be separated, purified, and esterified to produce biodegradable plastic (PBS). For example, Jian Zhang et al. designed a three-electrode system to hydrogenate 1,4-butynediol to produce 1,4-butanediol (CN114411179B). Jianlin Shi's team designed a Ni-based catalyst to oxidize 1,4-butanediol to succinic acid in an alkaline solution (Angew. Chem. Int. Ed. 2024, e202411502). However, there is limited research on the "series" coupling of 1,4-butynediol to 1,4-butanediol, followed by oxidation of 1,4-butanediol to succinic acid, and further esterification of the product to produce biodegradable plastic (PBS). Therefore, there is a need to further develop a system for the green synthesis of biodegradable plastic (PBS). Utility Model Content

[0004] The utility model is proposed to optimize the low efficiency of the electrocatalytic coupling system driven by renewable energy and the problem of product separation in the electrocatalytic reaction process in the existing technology. Its purpose is to provide a system for the joint preparation of degradable plastics by electrocatalytic hydrogenation coupled with organic matter oxidation.

[0005] The utility model is realized through the following technical solutions:

[0006] A system for preparing degradable plastics by electrocatalytic hydrogenation coupled with organic oxidation, comprising an electrocatalytic hydrogenation coupled with organic oxidation reaction system, a product separation system, and an organic monomer esterification system;

[0007] The electrocatalytic hydrogenation coupled organic oxidation reaction system includes a power supply mechanism, at least one electrochemical coupling reactor, a raw material storage mechanism, and a product recovery mechanism; the power supply mechanism is electrically connected to the electrochemical coupling reactor, the raw material storage mechanism is connected to the liquid inlet of the electrochemical coupling reactor, and the product recovery mechanism is connected to the liquid outlet of the electrochemical coupling reactor;

[0008] The product separation system includes an anode product separation mechanism and a cathode product separation mechanism; the anode product separation mechanism is connected to the anode product recovery device through a pipeline; the cathode product separation mechanism is connected to the cathode product recovery device through a pipeline;

[0009] The organic monomer esterification system comprises an esterification reactor, and a liquid inlet of the esterification reactor is connected to a cathode product separation and recovery device and an anode product separation and recovery device through pipelines.

[0010] In the above technical solution, the power supply mechanism includes a photovoltaic module, a transformer, an AC-DC converter and a DC power supply electrically connected in sequence, and a circuit breaker is provided on the line between the transformer and the AC-DC converter.

[0011] In the above technical solution, the electrochemical coupling reactor includes a cathode end plate, a cathode sealing ring, a cathode flow channel plate, a cathode catalyst layer, a cathode current collecting plate, a diaphragm, an anode current collecting plate, an anode catalyst layer, an anode flow channel plate, an anode sealing ring and an anode end plate arranged in sequence; except for the cathode catalyst layer and the anode catalyst layer, the remaining electrochemical coupling reactor components are fastened to each other by bolts, and the cathode catalyst layer and the anode catalyst layer are pressed into corresponding positions.

[0012] In the above technical solution, the raw material storage mechanism includes a cathode raw material storage device connected to the liquid inlet of the cathode flow channel plate of the electrochemical coupling reactor and an anode raw material storage device connected to the liquid inlet of the anode flow channel plate of the electrochemical coupling reactor.

[0013] In the above technical solution, the product recovery mechanism includes a cathode product recoverer connected to the liquid outlet of the cathode flow channel plate of the electrochemical coupling reactor and an anode product recoverer connected to the liquid outlet of the anode flow channel plate of the electrochemical coupling reactor; the cathode product recoverer is connected to the anode raw material storage through a pipeline; the cathode product recoverer and the anode product recoverer are both connected to the product separation system through pipelines.

[0014] In the above technical solution, the cathode product separation mechanism includes a cathode product separator, a cathode separator DC power supply, a cathode alkali recoverer and a cathode product separation recoverer; the anode product separation mechanism includes an anode product separator, an anode separator DC power supply, an anode alkali recoverer and an anode product separation recoverer; the outlet end of the anode alkali recoverer is connected to the cathode raw material storage device through a pipeline.

[0015] In the above technical solution, the cathode product separator includes a deionized water reservoir, an anode, a cathode, and a bipolar membrane group and a cation exchange membrane group arranged between the anode and the cathode; the bipolar membrane group includes a positive electrode bipolar membrane, a middle bipolar membrane and a cathode bipolar membrane arranged at intervals; the cation exchange membrane group includes a first cation exchange membrane arranged between the positive electrode bipolar membrane and the middle bipolar membrane and a second cation exchange membrane arranged between the middle bipolar membrane and the cathode bipolar membrane; and the first cation exchange membrane is spaced apart from the positive electrode bipolar membrane and the middle bipolar membrane; the second cation exchange membrane is spaced apart from the middle bipolar membrane and the cathode bipolar membrane; a positive electrode bipolar membrane and a first cation exchange membrane are formed between the positive electrode bipolar membrane and the first cation exchange membrane. a first chamber; a second chamber is formed between the first cation exchange membrane and the middle bipolar membrane; a third chamber is formed between the middle bipolar membrane and the second cation exchange membrane; a fourth chamber is formed between the second cation exchange membrane and the cathode bipolar membrane; the cathode product recoverer is connected to the liquid inlets of the first chamber and the third chamber respectively through pipelines; the cathode product separation recoverer is connected to the liquid outlets of the first chamber and the third chamber respectively through pipelines; the deionized water reservoir is connected to the liquid inlets of the second chamber and the fourth chamber respectively through pipelines; the inlet end of the cathode alkali recoverer is connected to the liquid outlets of the second chamber and the fourth chamber respectively through pipelines, and its outlet end is connected to the cathode raw material storage device through a pipeline.

[0016] The beneficial effects of the utility model are:

[0017] The utility model provides a system for the joint preparation of degradable plastics by electrocatalytic hydrogenation coupled with organic oxidation. By achieving effective material communication between the cathode organic hydrogenation product and the anode organic oxidation product, an electrochemical system capable of producing degradable plastic monomers and esterifying to obtain degradable plastic PBS is constructed, thereby achieving efficient synthesis of green chemicals driven by renewable energy. At the same time, combined with a product separation system based on the electrodialysis principle, ions are selectively transported through an ion exchange membrane under the action of an electric field, thereby achieving effective separation of anode and cathode products and alkali from the solution, and achieving the purpose of product separation and alkali recovery. The esterification reactor realizes the esterification polymerization of the organic monomers while recovering the solvent and catalyst, thereby achieving resource recycling. The utility model has a wide range of applicability and provides a new idea for the green synthesis field of preparing degradable plastic PBS by a renewable energy-driven electrocatalytic hydrogenation coupled with organic oxidation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the utility model;

[0019] Figure 2 It is a structural schematic diagram of the electrochemical coupling reactor in the utility model;

[0020] Figure 3 This is a schematic structural diagram of the cathode product separator in the utility model;

[0021] Figure 4 It is the liquid phase spectrum of the cathode and anode products in the coupled system in the application example of the utility model;

[0022] Figure 5 This is the cathode product separation diagram in the application example of the utility model;

[0023] Figure 6 This is an it diagram of anode product separation in an application example of the utility model;

[0024] Figure 7 This is the XRD spectrum of the degradable plastic PBS in the application example of the utility model;

[0025] Figure 8 It is the infrared spectrum of the degradable plastic PBS in the application example of the utility model.

[0026] in:

[0027] 1. Electrocatalytic hydrogenation coupled with organic oxidation reaction system;

[0028] 11. Photovoltaic module; 12. Transformer; 13. Circuit breaker; 14. AC / DC converter; 15. DC power supply; 16. Electrochemical coupled reactor; 161. Cathode terminal plate; 162. Cathode sealing ring; 163. Cathode flow channel plate; 164. Cathode catalyst layer; 165. Cathode current collecting plate; 166. Diaphragm; 167. Anode current collecting plate; 168. Anode catalyst layer; 169. Anode flow channel plate; 1610. Anode sealing ring; 1611. Anode terminal plate; 17. Cathode raw material reservoir; 18. Cathode product recoverer; 19. Anode raw material reservoir; 110. Anode product recoverer;

[0029] 2. Product separation system;

[0030] 21. Cathode product separator;

[0031] 211. Anode; 212. Cathode; 213. Positive bipolar membrane; 214. Middle bipolar membrane; 215. Cathode bipolar membrane; 216. First cation exchange membrane; 217. Second cation exchange membrane; 218. Deionized water reservoir; 22. Anode product separator; 23. Cathode alkali recovery device; 24. Anode alkali recovery device; 25. Cathode product separation recovery device; 26. Anode product separation recovery device; 27. Cathode separator DC power supply; 28. Anode separator DC power supply;

[0032] 3. Organic monomer esterification system;

[0033] 31. Esterification reactor; 32. Esterification catalyst recovery device; 33. Esterification solvent recovery device; 34. Degradable plastic recovery device.

[0034] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0036] like Figures 1 to 3 As shown, a system for preparing degradable plastics by electrocatalytic hydrogenation coupled with organic oxidation comprises an electrocatalytic hydrogenation coupled with organic oxidation reaction system 1, a product separation system 2 and an organic monomer esterification system 3;

[0037] The electrocatalytic hydrogenation coupled organic oxidation reaction system 1 includes a power supply mechanism, at least one electrochemical coupling reactor 16, a raw material storage mechanism, and a product recovery mechanism; the power supply mechanism is electrically connected to the electrochemical coupling reactor 16, the raw material storage mechanism is connected to the liquid inlet of the electrochemical coupling reactor 16, and the product recovery mechanism is connected to the liquid outlet of the electrochemical coupling reactor 16;

[0038] A pump and a valve are provided on the pipeline between the raw material storage mechanism and the liquid inlet of the electrochemical coupling reactor 16; a pump and a valve are provided on the pipeline between the product recovery mechanism and the liquid outlet of the electrochemical coupling reactor 16;

[0039] The power supply mechanism includes a photovoltaic module 11, a transformer 12, an AC-DC converter 14, and a DC power supply 15 electrically connected in sequence, and a circuit breaker 13 is provided on the line between the transformer 12 and the AC-DC converter 14; the photovoltaic module 11 may be multiple, and the multiple photovoltaic modules 11 are connected in series or in parallel;

[0040] The electrochemically coupled reactor 16 includes a cathode end plate 161, a cathode sealing ring 162, a cathode flow channel plate 163, a cathode catalyst layer 164, a cathode current collecting plate 165, a diaphragm 166, an anode current collecting plate 167, an anode catalyst layer 168, an anode flow channel plate 169, an anode sealing ring 1610 and an anode end plate 1611, which are arranged in sequence; except for the cathode catalyst layer 164 and the anode catalyst layer 168, the remaining components of the electrochemically coupled reactor 16 are fastened together by bolts, and the cathode catalyst layer 164 and the anode catalyst layer 168 are pressed tightly in corresponding positions; when there are multiple electrochemically coupled reactors 16, the multiple electrochemically coupled reactors 16 are connected in parallel;

[0041] The cathode end plate 161 and the anode end plate 1611 have the same structure, shape and size, and are both plate-shaped structures with bolt holes formed around them for connection;

[0042] The cathode sealing ring 162 and the anode sealing ring 1610 have the same structure, shape and size, and are both rectangular structures with bolt holes formed around them for connection;

[0043] The cathode flow channel plate 163 and the anode current collecting plate 167 have the same structure, shape and size. Both are plate-shaped structures with a serpentine flow channel formed in the middle and bolt holes formed around them for connection.

[0044] The cathode catalyst layer 164 is a double-layer structure consisting of a conductive substrate and a CuO layer supported on the conductive substrate; the anode catalyst layer 168 is a double-layer structure consisting of a conductive substrate and a nickel hydroxide layer supported on the conductive substrate;

[0045] The cathode current collecting plate 165 and the anode current collecting plate 167 have the same structure, shape, and size. Both are plate-shaped structures, with a wiring protrusion formed at one end and a catalyst layer groove formed in the middle. The cathode catalyst layer 164 and the anode catalyst layer 168 are placed in the corresponding catalyst layer grooves. The cathode current collecting plate 165 and the anode current collecting plate 167 are respectively connected to the positive and negative electrodes of the DC power supply 15.

[0046] The diaphragm 166 is used to isolate the anode and cathode reactants and conduct ions;

[0047] The raw material storage mechanism includes a cathode raw material storage 17 connected to the liquid inlet of the cathode flow channel plate 163 of the electrochemical coupling reactor 16 and an anode raw material storage 19 connected to the liquid inlet of the anode flow channel plate 169 of the electrochemical coupling reactor 16;

[0048] The product recovery mechanism includes a cathode product recoverer 18 connected to the liquid outlet of the cathode flow channel plate 163 of the electrochemical coupling reactor 16 and an anode product recoverer 110 connected to the liquid outlet of the anode flow channel plate 169 of the electrochemical coupling reactor 16;

[0049] The cathode product recovery device 18 is connected to the anode raw material storage device 19 via a pipeline, and a pump and a valve are provided on the connecting pipeline;

[0050] The cathode product recovery device 18 and the anode product recovery device 110 are both connected to the product separation system 2 through pipelines, and pumps and valves are provided on the pipelines;

[0051] The product separation system 2 includes an anode product separation mechanism and a cathode product separation mechanism; the anode product separation mechanism and the cathode product separation mechanism have the same structure and composition; the anode product separation mechanism is connected to the anode product recovery device 110 through a pipeline, and a pump and a valve are provided on the pipeline; the cathode product separation mechanism is connected to the cathode product recovery device 18 through a pipeline, and a pump and a valve are provided on the pipeline;

[0052] The cathode product separation mechanism includes a cathode product separator 21, a cathode separator DC power supply 27, a cathode alkali recovery device 23 and a cathode product separation recovery device 25;

[0053] The cathode product separator 21 includes a deionized water reservoir 218, an anode 211, a cathode 212, and a bipolar membrane group and a cation exchange membrane group disposed between the anode 211 and the cathode 212;

[0054] The bipolar membrane group includes a positive electrode bipolar membrane 213, a middle bipolar membrane 214 and a cathode bipolar membrane 215 that are spaced apart; the cation exchange membrane group includes a first cation exchange membrane 216 disposed between the positive electrode bipolar membrane 213 and the middle bipolar membrane 214 and a second cation exchange membrane 217 disposed between the middle bipolar membrane 214 and the cathode bipolar membrane 215; and the first cation exchange membrane 216 is spaced apart from the positive electrode bipolar membrane 213 and the middle bipolar membrane 214; the second cation exchange membrane 217 is spaced apart from the middle bipolar membrane 214 and the cathode bipolar membrane 215;

[0055] A first chamber is formed between the positive bipolar membrane 213 and the first cation exchange membrane 216; a second chamber is formed between the first cation exchange membrane 216 and the middle bipolar membrane 214; a third chamber is formed between the middle bipolar membrane 214 and the second cation exchange membrane 217; and a fourth chamber is formed between the second cation exchange membrane 217 and the cathode bipolar membrane 215.

[0056] The cathode product recovery device 18 is connected to the liquid inlets of the first chamber and the third chamber through pipelines, and a pump and a valve are provided on the pipelines;

[0057] The cathode product separation and recovery device 25 is connected to the liquid outlets of the first chamber and the third chamber respectively through pipelines, and a pump and a valve are provided on the pipelines;

[0058] The deionized water reservoir 218 is connected to the liquid inlets of the second chamber and the fourth chamber respectively through pipelines, and a pump and a valve are provided on the pipelines;

[0059] The inlet end of the cathode alkali recovery device 23 is connected to the liquid outlet of the second chamber and the fourth chamber respectively through pipelines, and a pump and a valve are provided on the pipelines, and the outlet end thereof is connected to the cathode raw material storage 17 through a pipeline;

[0060] The anode product separation mechanism includes an anode product separator 22, an anode separator DC power supply 28, an anode alkali recovery device 24, and an anode product separation recovery device 26; the anode product separator 22 and the cathode product separator 21 have the same structure and composition, which will not be repeated here; the outlet end of the anode alkali recovery device 24 is connected to the cathode raw material storage device 17 through a pipeline;

[0061] The organic monomer esterification system 3 includes an esterification reactor 31, the liquid inlet of which is connected to the cathode product separation and recovery device 25 and the anode product separation and recovery device 26 through pipelines respectively; the esterification reactor 31 is a conventional esterification reaction device;

[0062] The organic monomer esterification system 3 further includes an esterification catalyst recovery tank 32 , an esterification solvent recovery tank 33 and a degradable plastic recovery tank 34 .

[0063] Application Examples

[0064] The system described in Example 1 was constructed to perform an electrocatalytic coupling reaction. The 1,4-butynediol in the cathode reaction reservoir was passed into the cathode flow plate of the electrochemical coupling reactor, and the 1,4-butanediol in the anode reaction reservoir was passed into the anode flow plate of the electrochemical coupling reactor at a flow rate of 0.05 L / min to 1.00 L / min; a direct current of 0.7 to 2.0 V was connected; the 1,4-butanediol compound was transferred to the cathode product recovery device at the liquid outlet of the cathode flow plate of the electrochemical coupling reactor; at the same time, the 1,4-butanediol could also be transferred to the anode reactant reservoir for direct use; the succinic acid compound was transferred to the anode product recovery device at the liquid outlet of the anode flow plate of the electrochemical coupling reactor;

[0065] The cathode product recovery device and the anode product recovery device flow into the cathode product separator and the anode product separator through pumps and are separated by electrodialysis. The separated cathode and cathode products flow into the esterification reactor, and the alkaline solution recovered by the cathode and cathode can flow back into the cathode reactant storage device and mix with BYD for further reaction.

[0066] In the esterification reaction system, inert gas, organic solvent and catalyst are introduced under heating to mix and esterify to obtain degradable plastic PBS.

[0067] In this application example, the cathode catalyst layer in the electrochemical coupling system is prepared using a CuO catalyst, and the anode catalyst layer is prepared using a nickel hydroxide catalyst.

[0068] When the electrochemical coupling system is working, 1,4-butynediol and 1,4-butanediol are introduced into the electrochemical coupling reactor through the cathode reactant reservoir and the anode reactant reservoir respectively, with a flow rate of 0.5L / min and an operating temperature of 25°C; a battery workstation (chi 1140) is used to react at a constant current of 300mA. Figure 4 High performance liquid chromatogram of cathode and anode products of the electrochemical coupling system.

[0069] The cathode and anode products are separated by electrodialysis. Figure 5 and Figure 6 It curve diagram of the separation of cathode end product and anode end product under different constant voltages.

[0070] The separated product is added with an organic solvent (decalin) and a catalyst (SnCl2) and esterified under heating (140-200°C) conditions to obtain a degradable plastic PBS under the introduction of inert gas (N2). Figure 7 and Figure 8The XRD pattern and infrared spectrum of biodegradable plastic PBS.

[0071] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0072] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0073] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0074] The applicant declares that the above is only a specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Technicians in the relevant technical field should understand that any changes or substitutions that can be easily thought of by technicians in the relevant technical field within the technical scope disclosed in the present invention fall within the protection scope and disclosure scope of the present invention.

Claims

1. A system for preparing biodegradable plastics by coupling electrocatalytic hydrogenation with organic oxidation, characterized by: It comprises an electrocatalytic hydrogenation coupled organic oxidation reaction system (1), a product separation system (2) and an organic monomer esterification system (3); The electrocatalytic hydrogenation coupled organic matter oxidation reaction system (1) comprises a power supply mechanism, at least one electrochemical coupling reactor (16), a raw material storage mechanism, and a product recovery mechanism; the power supply mechanism is electrically connected to the electrochemical coupling reactor (16), the raw material storage mechanism is connected to the liquid inlet of the electrochemical coupling reactor (16), and the product recovery mechanism is connected to the liquid outlet of the electrochemical coupling reactor (16); The product separation system (2) comprises an anode product separation mechanism and a cathode product separation mechanism; the anode product separation mechanism is connected to the anode product recovery device (110) through a pipeline; the cathode product separation mechanism is connected to the cathode product recovery device (18) through a pipeline; The organic monomer esterification system (3) comprises an esterification reactor (31), and the liquid inlet of the esterification reactor (31) is connected to the cathode product separation and recovery device (25) and the anode product separation and recovery device (26) through pipelines.

2. The system for preparing degradable plastics by electrocatalytic hydrogenation coupled with organic oxidation according to claim 1, characterized in that: The power supply mechanism comprises a photovoltaic assembly (11), a transformer (12), an AC / DC converter (14) and a DC power supply (15) which are electrically connected in sequence, and a circuit breaker (13) is provided on the line between the transformer (12) and the AC / DC converter (14).

3. The system for preparing degradable plastics by electrocatalytic hydrogenation coupled with organic oxidation according to claim 1, characterized in that: The electrochemical coupling reactor (16) comprises a cathode end plate (161), a cathode sealing ring (162), a cathode flow channel plate (163), a cathode catalyst layer (164), a cathode current collecting plate (165), a diaphragm (166), an anode current collecting plate (167), an anode catalyst layer (168), an anode flow channel plate (169), an anode sealing ring (1610) and an anode end plate (1611) which are arranged in sequence; except for the cathode catalyst layer (164) and the anode catalyst layer (168), the other components of the electrochemical coupling reactor (16) are fastened together by bolts, and the cathode catalyst layer (164) and the anode catalyst layer (168) are pressed tightly at corresponding positions.

4. The system for preparing degradable plastics by electrocatalytic hydrogenation coupled with organic oxidation according to claim 1, characterized in that: The raw material storage mechanism comprises a cathode raw material storage (17) connected to a liquid inlet of a cathode flow channel plate (163) of an electrochemically coupled reactor (16) and an anode raw material storage (19) connected to a liquid inlet of an anode flow channel plate (169) of the electrochemically coupled reactor (16).

5. The system for preparing degradable plastics by electrocatalytic hydrogenation coupled with organic oxidation according to claim 1, characterized in that: The product recovery mechanism comprises a cathode product recoverer (18) connected to a liquid outlet of a cathode flow channel plate (163) of an electrochemically coupled reactor (16) and an anode product recoverer (110) connected to a liquid outlet of an anode flow channel plate (169) of the electrochemically coupled reactor (16); the cathode product recoverer (18) is connected to an anode raw material storage (19) via a pipeline; and both the cathode product recoverer (18) and the anode product recoverer (110) are connected to a product separation system (2) via a pipeline.

6. The system for preparing degradable plastics by electrocatalytic hydrogenation coupled with organic oxidation according to claim 1, characterized in that: The cathode product separation mechanism includes a cathode product separator (21), a cathode separator DC power supply (27), a cathode alkali recovery device (23) and a cathode product separation recovery device (25); the anode product separation mechanism includes an anode product separator (22), an anode separator DC power supply (28), an anode alkali recovery device (24) and an anode product separation recovery device (26); the outlet end of the anode alkali recovery device (24) is connected to the cathode raw material storage device (17) through a pipeline.

7. The system for preparing degradable plastics by electrocatalytic hydrogenation coupled with organic oxidation according to claim 6, characterized in that: The cathode product separator (21) comprises a deionized water reservoir (218), an anode (211), a cathode (212), and a bipolar membrane group and a cation exchange membrane group arranged between the anode (211) and the cathode (212); the bipolar membrane group comprises a positive bipolar membrane (213), a middle bipolar membrane (214), and a cathode bipolar membrane (215) arranged at intervals; the cation exchange membrane group comprises a first cation exchange membrane (216) arranged between the positive bipolar membrane (213) and the middle bipolar membrane (214), and a second cation exchange membrane (217) arranged between the middle bipolar membrane (214) and the cathode bipolar membrane (215); and the first cation exchange membrane (216) is arranged at intervals from the positive bipolar membrane (213) and the middle bipolar membrane (214); the second cation exchange membrane (217) is arranged at intervals from the middle bipolar membrane (214) and the cathode bipolar membrane (215); A first chamber is formed between the cathode bipolar membrane (213) and the first cation exchange membrane (216); a second chamber is formed between the first cation exchange membrane (216) and the middle bipolar membrane (214); a third chamber is formed between the middle bipolar membrane (214) and the second cation exchange membrane (217); a fourth chamber is formed between the second cation exchange membrane (217) and the cathode bipolar membrane (215); the cathode product recoverer (18) is communicated with the liquid inlets of the first chamber and the third chamber respectively through pipelines; the cathode product separation recoverer (25) is communicated with the liquid outlets of the first chamber and the third chamber respectively through pipelines; the deionized water reservoir (218) is communicated with the liquid inlets of the second chamber and the fourth chamber respectively through pipelines; the inlet end of the cathode alkali recoverer (23) is communicated with the liquid outlets of the second chamber and the fourth chamber respectively through pipelines, and its outlet end is communicated with the cathode raw material storage (17) through a pipeline.

Images