Plate frame type electrolytic bath for organic electrochemical synthesis

Abstract

The invention relates to the field of organic electrochemical synthesis, in particular to a plate frame type electrolytic bath for organic electrochemical synthesis. The electrolytic bath comprises a plurality of reaction units, each reaction unit comprises a cathode chamber and an anode chamber, a cathode plate and cathode liquor are arranged in each cathode chamber, an anode plate and anode liquor are arranged in each anode chamber, the cathode plates are connected with an external direct-current power supply cathode, the anode plates are connected with an external direct-current power supply anode, and the anode plates are connected with an external direct-current power supply anode. The cathode chamber is provided with a cathode cooling jacket, the anode chamber is provided with an anode cooling jacket, the cathode cooling jacket is provided with a cathode side cooling flow channel c, and the anode cooling jacket is provided with an anode side cooling flow channel d. According to the plate frame type electrolytic cell for organic electrochemical synthesis, through the arrangement of the double cooling flow channels, independent control over the reaction temperature of the cathode chamber and the anode chamber is achieved, and therefore the stability and efficiency of the electrolytic reaction are improved.

Description

Technical Field

[0001] The present invention relates to the field of organic electrochemistry synthesis, and in particular to a plate-frame electrolytic cell for organic electrochemistry synthesis. Background Art

[0002] In the field of organic synthesis, traditional methods mainly rely on sacrificial reagents such as oxidants, reductants, and catalysts, and require harsh reaction conditions such as high temperature and high pressure. This method not only has long reaction steps but also has safety and environmental problems. As the core technical equipment for organic electro-synthesis, although electrolytic cells have been widely used in industries such as electrolytic water hydrogen production and chlor-alkali, they are still less used in the direct electrolytic synthesis of organic compounds.

[0003] For example, in the patent with Chinese patent publication number CN119287397A and title "An Electrolytic Cell", the electrolytic cell includes a first electrolytic cell body and a second electrolytic cell body located on both sides of a diaphragm plate. The first electrolytic cell body includes an anode chamber, and the second electrolytic cell body includes a cathode chamber. The anode plate of the anode chamber and the cathode plate of the cathode chamber are respectively abutted against the diaphragm plate; the first electrolytic cell body and the second electrolytic cell body respectively include a support shell, and a partial area of the support shell is a transparent area. Removable flow field adjustment components are respectively arranged in the anode chamber and the cathode chamber. The flow field adjustment component includes a support frame and at least one baffle plate that can adjustably connect to the inside of the support frame and change the fluid flow direction. The disadvantage is that although the electrochemical reaction kinetic model inside the electrolytic cell can be qualitatively studied, the cooling device is not considered, and temperature is a major factor in electrolytic synthesis.

[0004] In the patents with Chinese patent publication numbers CN215103599U and title "An Electrolytic Cell", and CN112830555A and title "A Dual-Potential Anode Electrolytic Device and Method", the influence of temperature is also not considered. Summary of the Invention

[0005] Aiming at the problem that the electrolytic cell for electrolytic synthesis of organic compounds in the prior art does not consider the influence of temperature, the present invention provides a plate-frame electrolytic cell for organic electrochemistry synthesis. Through the setting of a double cooling flow channel, independent control of the reaction temperature of the cathode chamber and the anode chamber is realized, thereby improving the stability and efficiency of the electrolytic reaction.

[0006] To achieve the above technical objectives, a technical solution provided by the present invention is a plate-and-frame electrolytic cell for organic electrochemical synthesis. The electrolytic cell includes a plurality of reaction units. Each reaction unit includes a cathode chamber and an anode chamber. A cathode plate and cathode liquid are provided in the cathode chamber, and an anode plate and anode liquid are provided in the anode chamber. The cathode plate is connected to the cathode of an external DC power supply, and the anode plate is connected to the anode of the external DC power supply. A cathode cooling jacket is provided on the side of the cathode chamber, and an anode cooling jacket is provided on the side of the anode chamber. The cathode cooling jacket is provided with a cathode-side cooling c flow channel for introducing a cooling medium to control the reaction temperature of the cathode chamber, and the anode cooling jacket is provided with an anode-side cooling d flow channel for introducing a cooling medium to control the reaction temperature of the anode chamber. A cathode-side connection plate is provided on one side of the cathode chamber, and an anode-side connection plate is provided on one side of the anode chamber. Both the cathode-side connection plate and the anode-side connection plate are provided with a double-flow inlet for the cathode liquid a flow channel and the anode liquid b flow channel, and a double-flow outlet for the cathode-side cooling c flow channel and the anode-side d flow channel.

[0007] In this technical solution, the cathode chamber and the anode chamber are respectively configured with independent cooling jacket systems to form physically isolated cooling flow channels. The cathode-side cooling c flow channel is dedicated to the cathode chamber, and the anode-side cooling d flow channel independently regulates the temperature of the anode chamber. This dual-channel design completely eliminates the temperature coupling effect caused by the cross-talk of hot and cold media in the traditional single-flow channel system. The dual-flow channel structure, combined with an intelligent temperature control algorithm, realizes the temperature gradient control of the cathode and anode reaction zones. The design of the cooling jacket and the cooling flow channel can accurately regulate the temperatures of the cathode chamber and the anode chamber, ensure that the reaction proceeds under suitable conditions, improve the Faraday electrolysis efficiency, and reduce the probability of side reactions. The dual-flow inlet and outlet can evenly distribute and efficiently transport the materials, accelerate the reaction process, and improve the production efficiency.

[0008] The present invention is further configured as follows: A diaphragm is provided between the anode chamber and the cathode chamber. The cathode liquid enters the cathode chamber through the cathode liquid a1 interface, and the anode liquid enters the anode chamber through the cathode liquid b1 interface. A reduction reaction occurs in the cathode chamber, and an oxidation reaction occurs in the anode chamber. Ions migrate through the diaphragm, and the reacted cathode liquid and anode liquid flow out from the cathode liquid a2 interface and the anode liquid b2 interface of the anode-side connection plate respectively.

[0009] In this technical solution, the diaphragm, as a key functional component, constructs a directional ion channel while blocking the direct contact between the cathode liquid and the anode liquid. The independent connection plate systems on the cathode side and the anode side form a double-loop flow path. The cathode liquid enters the reaction zone through the a flow channel of the double-flow inlet after passing through the pre-cooling module, and the anode liquid is extracted after completing the oxidation reaction through the b flow channel.

[0010] The present invention is further configured as follows: the anode chamber and the cathode chamber are directly connected to form an integral electrolytic chamber, so that the electrolytic cell becomes a diaphragm-free plate-and-frame electrolytic cell. At this time, the electrolyte enters and exits the electrolytic chamber through flow channel a and flow channel b, forming a double-flow channel structure to improve fluid efficiency and mass transfer and heat transfer effects. A plurality of bipolar plates are arranged in the electrolytic chamber to form a bipolar plate stack to increase the electrolysis area.

[0011] In this technical solution, after the diaphragm is removed, the electrolyte forms a continuous phase in the electrolysis chamber, the material transfer resistance is reduced, the direct contact interface shortens the ion migration path to the micron level, the ion conductivity is improved, it is suitable for ionic liquids or high-concentration electrolyte systems, and the reaction rate is improved. The bipolar plate vertical stacking structure is adopted to form a reaction space with a three-dimensional electrolysis network, and the stacking structure increases the turbulent kinetic energy of the electrolyte.

[0012] The present invention is further configured as follows: the reaction unit is composed of multiple functional components that are compressed and assembled into a plate-frame structure by fastening bolts and end pressure plates, and sealing gaskets are arranged between the multiple functional components, and the functional components include cathode plates, anode plates, cathode cooling jackets, anode cooling jackets, cathode side pipe plates, and anode side pipe plates, or the functional components include cathode plates, anode plates, cathode cooling jackets, anode cooling jackets, cathode side pipe plates, anode side pipe plates, and diaphragms. Each electrolysis unit is an independent plate-frame structure, and the linear expansion of the device capacity can be achieved by repeatedly stacking multiple units.

[0013] The present invention is further configured such that the electrolytic cell implements the following temperature control strategy: The cathode side cooling channel c and the anode side cooling channel d are arranged independently to ensure that the temperature control of the cathode chamber and the anode chamber does not interfere with each other; The cathode side cooling channel c and the anode side cooling channel d are both provided with cooling medium, and flow control valves are provided at the entrances of the cathode side cooling channel c and the anode side cooling channel d to achieve temperature regulation by adjusting the flow of cooling medium; Two temperature sensors are respectively arranged inside the cathode chamber and the anode chamber, and the two temperature sensors are symmetrically arranged on both sides of the cathode plate or the anode plate; According to the PID control algorithm, the deviation between the temperature sensor feedback temperature and the preset value is calculated, and the cooling medium flow rate and the cooling medium temperature are dynamically adjusted; Set the ambient temperature compensation algorithm to automatically adjust the cooling medium parameters according to the ambient temperature changes; According to the preset machine learning model, historical temperature data and reaction parameters are analyzed to predict the impact of equipment aging or failure on temperature control and issue early warnings.

[0014] In this technical solution, precise and stable control of the temperatures in the cathode chamber and the anode chamber is ensured. The independently arranged cooling channels avoid interference with each other, ensuring that the reaction proceeds under suitable temperature conditions for each, reducing side reactions, and improving the Faraday electrolysis efficiency and product purity. The combination of the flow control valve and the PID control algorithm can dynamically adjust the flow rate and temperature of the cooling medium according to the real-time temperature deviation, quickly respond to temperature changes, and maintain the stability of the reaction environment. The environmental temperature compensation algorithm eliminates the influence of environmental factors on the reaction temperature, further enhancing the adaptability and reliability of the system. The application of the machine learning model can predict in advance the impact of equipment aging or failure on temperature control and give early warnings, facilitating timely maintenance of the equipment, preventing production accidents or product quality degradation caused by temperature runaway, extending the service life of the equipment, and reducing production costs.

[0015] The present invention is further configured as: the dynamic adjustment of the cooling medium temperature includes: A plate heat exchanger is connected in series in the cooling medium circulation loop, and the temperature of the cooling medium entering the electrolytic cell is controlled by adjusting the flow rates of the hot and cold side media of the heat exchanger; A multi-stage series temperature control unit is provided to adjust the temperature of the cooling medium step by step to achieve temperature gradient control between the cathode chamber and the anode chamber.

[0016] In this technical solution, the plate heat exchanger controls the temperature of the cooling medium by adjusting the flow rates of the hot and cold side media, can quickly and precisely respond to temperature changes during the reaction process, ensure that the cathode chamber and the anode chamber are always at the optimal reaction temperature, reduce the adverse effects of temperature fluctuations on the reaction, and improve the efficiency and product quality of the organic electrosynthesis reaction. The multi-stage series temperature control unit is set up to achieve temperature gradient control, meeting the special requirements of different organic synthesis reactions for the temperature difference between the cathode chamber and the anode chamber, further expanding the application range of the electrolytic cell, and can be applied to more complex organic electrosynthesis reactions.

[0017] The present invention is further configured as: the materials of the cathode cooling jacket, the anode cooling jacket, the cathode chamber and the anode chamber are polypropylene or polytetrafluoroethylene.

[0018] In this technical solution, polypropylene or polytetrafluoroethylene has high chemical stability and strong corrosion resistance, can resist the erosion of the electrolyte during the organic electrosynthesis process, ensure the long-term stable operation of the electrolytic cell, extend the service life of the equipment, and reduce the maintenance cost. They also have good processing properties, are easy to be made into various complex shapes and structures, and meet the diverse design requirements of the electrolytic cell. In terms of heat transfer performance, they can effectively transfer heat, cooperate with the cooling channels to achieve efficient temperature control, ensure that the reaction proceeds at a suitable temperature, and improve the electrolysis efficiency and product quality.

[0019] The present invention is further configured such that: the end pressing plates include a cathode-side end pressing plate and an anode-side end pressing plate, and the materials of the cathode-side end pressing plate and the anode-side end pressing plate are stainless steel, polypropylene, polytetrafluoroethylene, or polysulfone.

[0020] In this technical solution, stainless steel, polypropylene, polytetrafluoroethylene, or polysulfone has excellent corrosion resistance. In the complex chemical environment of organic electrosynthesis, it can effectively resist the erosion of the electrolyte, extend the service life of the end pressing plates and even the entire electrolytic cell, reduce the frequency of equipment maintenance and replacement, and lower production costs.

[0021] The present invention is further configured such that: the materials of the cathode-side connecting pipe plate and the anode-side connecting pipe plate are stainless steel, polypropylene, polytetrafluoroethylene, or polysulfone.

[0022] In this technical solution, the materials of stainless steel, polypropylene, polytetrafluoroethylene, or polysulfone have excellent corrosion resistance. During the process of organic electrosynthesis, they can resist the erosion of the electrolyte, ensuring the long-term stable operation of the connecting pipe plates. This prevents leakage problems caused by the corrosion of the connecting pipe plates, maintains the stability of material transfer in the electrolytic cell, avoids potential safety hazards and material losses caused by leakage, and ensures the continuous and efficient progress of the organic electrosynthesis reaction.

[0023] The present invention is further configured such that: the material of the diaphragm is an ion-exchange membrane. The ion-exchange membrane has excellent ion conduction performance, can selectively allow specific ions to pass through, effectively separate the cathode chamber and the anode chamber, prevent the direct contact of the reactants at both poles, reduce the occurrence of side reactions, and improve the Faraday electrolysis efficiency and product purity. In the organic electrosynthesis reaction, precise ion transport ensures that the reaction proceeds in the expected direction, enhancing the reaction effect.

[0024] The beneficial effects of the present invention are as follows: (1) Through the setting of double cooling channels, independent control of the reaction temperatures in the cathode chamber and the anode chamber is achieved, thereby improving the stability and efficiency of the electrolysis reaction; (2) The cathode chamber and the anode chamber are respectively equipped with independent cooling jacket systems to form physically isolated cooling channels. The cathode-side cooling c-channel is dedicated to serving the cathode chamber, and the anode-side cooling d-channel independently regulates the temperature of the anode chamber. This dual-channel design completely eliminates the temperature coupling effect caused by the cross-talk of hot and cold media in the traditional single-channel system. The dual-channel structure, combined with the intelligent temperature control algorithm, realizes the temperature gradient control of the cathode and anode reaction zones. The design of the cooling jacket and the cooling channel can accurately regulate the temperatures of the cathode chamber and the anode chamber, ensuring that the reaction proceeds under suitable conditions, improving the Faraday electrolysis efficiency, and reducing the probability of side reactions. The dual-channel inlet and outlet can evenly distribute and efficiently transport the materials, accelerating the reaction process and enhancing the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the plate-frame type electrolytic cell for organic electrochemical synthesis of the present invention; Figure 2 This is a side view of the plate-and-frame electrolytic cell for organic electrochemical synthesis of the present invention.

[0026] 1. Cathode side end pressing plate; 2. Cathode side connecting pipe plate; 3. First sealing gasket; 4. Cathode cooling jacket; 5. Second sealing gasket; 6. Cathode plate; 7. Third sealing gasket; 8. Cathode chamber; 9. Fourth sealing gasket; 10. Diaphragm; 11. Fifth sealing gasket; 12. Anode chamber; 13. Sixth sealing gasket; 14. Anode plate; 15. Seventh sealing gasket; 16. Anode cooling jacket; 17. Eighth sealing gasket; 18. Anode side connecting pipe plate; 19. Anode side end pressing plate. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific implementation manners described herein are only the best embodiments of the present invention, which are only used to explain the present invention and do not limit the protection scope of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] As Figure 1 shown, as Embodiment 1 of the present invention, a plate-and-frame electrolytic cell for organic electrochemical synthesis is characterized in that the electrolytic cell includes a plurality of reaction units, the reaction units include a cathode chamber 8 and an anode chamber 12, a cathode plate 6 and cathode liquid are provided in the cathode chamber 8, an anode plate 14 and anode liquid are provided in the anode chamber 12, the cathode plate 6 is connected to the cathode of an external DC power supply, the anode plate 14 is connected to the anode of an external DC power supply, a cathode cooling jacket 4 is provided on the side of the cathode chamber 8, an anode cooling jacket 16 is provided on the side of the anode chamber 12, the cathode cooling jacket 4 is provided with a cathode side cooling c flow channel for introducing a cooling medium to control the reaction temperature of the cathode chamber 8, the anode cooling jacket 16 is provided with an anode side cooling d flow channel for introducing a cooling medium to control the reaction temperature of the anode chamber 12, a cathode side connecting pipe plate 2 is provided on one side of the cathode chamber 8, an anode side connecting pipe plate 18 is provided on one side of the anode chamber 12, and both the cathode side connecting pipe plate 2 and the anode side connecting pipe plate 18 are provided with a double-flow inlet for a cathode liquid a flow channel and an anode liquid b flow channel and a double-flow outlet for a cathode side cooling c flow channel and an anode side d flow channel.

[0029] In this embodiment, the cathode chamber 8 and the anode chamber 12 are respectively equipped with independent cooling jacket systems to form physically isolated cooling channels. The cooling channel c on the cathode side exclusively serves the cathode chamber 8, and the cooling channel d on the anode side independently regulates the temperature of the anode chamber 12. This dual-channel design completely eliminates the temperature coupling effect caused by the cross-talk of hot and cold media in the traditional single-channel system. The dual-channel structure, combined with an intelligent temperature control algorithm, realizes the temperature gradient control of the cathode and anode reaction zones. The design of the cooling jacket and the cooling channel can accurately regulate the temperatures of the cathode chamber 8 and the anode chamber 12, ensuring that the reaction proceeds under suitable conditions, improving the Faraday electrolysis efficiency, and reducing the probability of side reactions. The dual-channel feed inlet and outlet can evenly distribute and efficiently transport the materials, accelerating the reaction process and enhancing the production efficiency.

[0030] In one embodiment of the present invention, a diaphragm 10 is provided between the anode chamber 12 and the cathode chamber 8. The catholyte enters the cathode chamber 8 through the catholyte a1 interface, and the anolyte enters the anode chamber 12 through the catholyte b1 interface. A reduction reaction occurs in the cathode chamber 8, and an oxidation reaction occurs in the anode chamber 12. Ions migrate through the diaphragm 10, and the reacted catholyte and anolyte flow out from the catholyte a2 interface and the anolyte b2 interface of the anode-side tube sheet 18, respectively.

[0031] In this technical solution, the diaphragm 10, as a key functional component, constructs a directional ion channel while preventing the direct contact between the catholyte and the anolyte. The independent tube sheet systems on the cathode side and the anode side form a double-loop flow path. The catholyte enters the reaction zone through the a-channel of the dual-channel feed inlet after passing through the precooling module, and the anolyte is withdrawn after completing the oxidation reaction through the b-channel.

[0032] In another embodiment of the present invention, the anode chamber 12 and the cathode chamber 8 are directly connected to form an integral electrolysis chamber, so that the electrolytic cell becomes a diaphragm-free plate-frame electrolytic cell. At this time, the electrolyte enters and exits the electrolysis chamber through the a-channel and the b-channel, forming a dual-channel structure to improve the fluid efficiency and the mass transfer and heat transfer effects. A plurality of bipolar plates are provided in the electrolysis chamber to form a bipolar plate stack to increase the electrolysis area.

[0033] In this technical solution, after canceling the diaphragm 10, the catholyte and the anolyte form a continuous phase in the electrolysis chamber, reducing the mass transfer resistance. The direct contact interface shortens the ion migration path to the micron level, improving the ion conductivity, which is applicable to ionic liquid or high-concentration electrolyte systems and increasing the reaction rate. The vertical stacking structure of the bipolar plates forms a reaction space with a three-dimensional electrolysis network, and the stacking structure increases the turbulent kinetic energy of the electrolyte.

[0034] The reaction unit is composed of multiple functional components compressed and combined into a plate-frame structure by fastening bolts and end pressing plates. Sealing gaskets are provided between the multiple functional components. The functional components include a cathode plate 6, an anode plate 14, a cathode cooling jacket 4, an anode cooling jacket 16, a cathode side connection pipe plate 2, and an anode side connection pipe plate 18. Or, the functional components include a cathode plate 6, an anode plate 14, a cathode cooling jacket 4, an anode cooling jacket 16, a cathode side connection pipe plate 2, an anode side connection pipe plate 18, and a diaphragm 10. Each electrolysis unit is an independent plate-frame structure, and the linear expansion of the device production capacity can be achieved by repeatedly stacking multiple units.

[0035] The electrolytic cell implements the following temperature control strategy: The cathode side cooling c-channel and the anode side cooling d-channel are arranged independently to ensure that the temperature control of the cathode chamber 8 and the anode chamber 12 does not interfere with each other; Cooling media are provided in both the cathode side cooling c-channel and the anode side cooling d-channel. Flow control valves are provided at the inlets of the cathode side cooling c-channel and the anode side cooling d-channel to adjust the temperature by adjusting the flow rate of the cooling media; Two temperature sensors are respectively provided inside the cathode chamber 8 and the anode chamber 12, and the two temperature sensors are symmetrically arranged on both sides of the cathode plate 6 or the anode plate 14; According to the PID control algorithm, calculate the deviation between the temperature feedback by the temperature sensor and the preset value, and dynamically adjust the flow rate of the cooling media and dynamically adjust the temperature of the cooling media; Set an ambient temperature compensation algorithm to automatically adjust the cooling media parameters according to the change of the ambient temperature; According to the preset machine learning model, analyze the historical temperature data and reaction parameters, predict the impact of equipment aging or failure on temperature control, and give an early warning.

[0036] In this technical solution, accurate and stable control of the temperatures of the cathode chamber 8 and the anode chamber 12 is ensured. The independently arranged cooling channels avoid mutual interference, ensure that the reaction proceeds under suitable temperature conditions respectively, reduce side reactions, and improve the Faraday electrolysis efficiency and product purity. The combination of the flow control valve and the PID control algorithm can dynamically adjust the flow rate and temperature of the cooling media according to the real-time temperature deviation, quickly respond to temperature changes, and maintain the stability of the reaction environment. The ambient temperature compensation algorithm eliminates the influence of environmental factors on the reaction temperature, further enhancing the adaptability and reliability of the system. The application of the machine learning model predicts in advance the impact of equipment aging or failure on temperature control and gives an early warning, facilitating timely maintenance of the equipment, preventing production accidents or product quality degradation caused by temperature runaway, extending the service life of the equipment, and reducing production costs.

[0037] It can be understood that the dynamically adjusting the temperature of the cooling media includes: A plate heat exchanger is connected in series in the cooling medium circulation loop, and the temperature of the cooling medium entering the electrolytic cell is controlled by adjusting the flow rates of the hot and cold side media of the heat exchanger. A multi-stage series temperature control unit is provided to adjust the temperature of the cooling medium step by step, so as to realize the temperature gradient control between the cathode chamber 8 and the anode chamber 12.

[0038] In this technical solution, the plate heat exchanger connected in series controls the temperature of the cooling medium by adjusting the flow rates of the hot and cold side media, and can quickly and accurately respond to the temperature changes during the reaction process, ensuring that the cathode chamber 8 and the anode chamber 12 are always at the optimal reaction temperature, reducing the adverse effects of temperature fluctuations on the reaction, and improving the efficiency and product quality of the organic electrosynthesis reaction. The multi-stage series temperature control unit is set to realize temperature gradient control, which meets the special requirements of different organic synthesis reactions for the temperature difference between the cathode chamber 8 and the anode chamber 12, further expands the application range of the electrolytic cell, and can be applied to more complex organic electrosynthesis reactions.

[0039] Preferably, the materials of the cathode cooling jacket 4, the anode cooling jacket 16, the cathode chamber 8 and the anode chamber 12 are polypropylene or polytetrafluoroethylene. Polypropylene or polytetrafluoroethylene has high chemical stability and strong corrosion resistance, can resist the erosion of the electrolyte during the organic electrosynthesis process, ensure the long-term stable operation of the electrolytic cell, extend the service life of the equipment, and reduce the maintenance cost. They also have good processing performance, are easy to be made into various complex shapes and structures, and meet the diverse design requirements of the electrolytic cell. In terms of heat transfer performance, they can effectively transfer heat, cooperate with the cooling channels to achieve efficient temperature control, ensure that the reaction proceeds at an appropriate temperature, and improve the electrolysis efficiency and product quality.

[0040] Preferably, the end pressing plates include a cathode-side end pressing plate 1 and an anode-side end pressing plate 19, and the materials of the cathode-side end pressing plate 1 and the anode-side end pressing plate 19 are stainless steel or polypropylene or polytetrafluoroethylene or polysulfone. Stainless steel or polypropylene or polytetrafluoroethylene or polysulfone has excellent corrosion resistance, and can effectively resist the erosion of the electrolyte in the complex chemical environment of organic electrosynthesis, extend the service life of the end pressing plate and even the entire electrolytic cell, reduce the equipment maintenance and replacement frequency, and lower the production cost.

[0041] Preferably, the materials of the cathode-side pipe connection plate 2 and the anode-side pipe connection plate 18 are stainless steel or polypropylene or polytetrafluoroethylene or polysulfone. The stainless steel or polypropylene or polytetrafluoroethylene or polysulfone material has excellent corrosion resistance, can resist the erosion of the electrolyte during the organic electrosynthesis process, and ensure the long-term stable operation of the pipe connection plate. This prevents the leakage problem caused by the corrosion of the pipe connection plate, maintains the stability of the material transmission in the electrolytic cell, avoids the safety hazards and material losses caused by leakage, and ensures the continuous and efficient progress of the organic electrosynthesis reaction.

[0042] It is understandable that the material of the diaphragm 10 is an ion membrane. Preferably, the ion membrane is a perfluorosulfonic acid polymer Nafion membrane, which has excellent ion conductivity and can selectively allow specific ions to pass through, effectively separating the cathode chamber 8 and the anode chamber 12, preventing the direct contact between the two polar reactants, reducing the occurrence of side reactions, and improving the Faraday electrolysis efficiency and product purity. In organic electrosynthesis reactions, precise ion transmission ensures that the reaction proceeds in the expected direction and improves the reaction effect.

[0043] It can be understood that the PID control algorithm is a control strategy that dynamically adjusts the control output by calculating the deviation between the actual temperature value and the set temperature value, and integrating the proportional term, integral term and differential term of the error. Among them, the proportional term is proportional to the current error and responds quickly to temperature changes. The integral term is proportional to the integral of the error and eliminates steady-state errors. The differential term is proportional to the rate of change of the error and suppresses temperature fluctuations.

[0044] It can be understood that the ambient temperature compensation algorithm monitors the ambient temperature in real time through a temperature sensor, establishes a mapping relationship between the ambient temperature and the electrolytic cell temperature control parameters (such as cooling medium flow rate, target temperature setting value), and compensates for the electrolytic cell temperature offset caused by ambient temperature changes.

[0045] It can be understood that the cooling medium parameters include flow rate, temperature and pressure.

[0046] Understandably, the preset machine learning models include: using supervised learning algorithms (such as LSTM neural networks or random forests) to build a prediction model, inputting historical temperature data, reaction parameters (such as current density, reactant concentration), equipment aging indicators (such as operating time, cooling medium impurity content), and outputting temperature control abnormality probability or equipment failure warning signals.

[0047] It is understood that reaction parameters include current density, reactant concentration and electrolyte pH.

[0048] It can be understood that in the figure, a1, b1, c1, and d1 are flow channel inlet pipes, a2, b2, c2, and d2 are flow channel outlet pipes, a1 and a2 form flow channel a, b1 and b2 form flow channel b, c1 and c2 form flow channel c, and d1 and d2 form flow channel d.

[0049] Preferably, the diaphragm 10 electrolyzer with cooling jacket: the installation components include cathode side end pressure plate 1, cathode side pipe plate 2, first sealing gasket 3, cathode cooling jacket 4, second sealing gasket 5, cathode plate 6, third sealing gasket 7, cathode chamber 8, fourth sealing gasket 9, diaphragm 10, fifth sealing gasket 11, anode chamber 12, sealing gasket, anode plate 14, seventh sealing gasket 15, anode cooling jacket 16, eighth sealing gasket 17, anode side pipe plate 18, anode side end pressure plate 19. At this time, for a single reaction unit, there are four separate fluid channels, namely, cathode liquid in cathode chamber 8, cooling jacket on cathode side, anode liquid in anode chamber 12 and cooling jacket on anode side, which can accurately control the temperature of the reaction process and fully improve the efficiency of Faraday electrolysis.

[0050] Preferably, the diaphragm-free electrolyzer 10 with cooling jacket: the installation assembly cathode side end pressure plate 1, cathode side pipe plate 2, first sealing gasket 3, cathode cooling jacket 4, second sealing gasket 5, cathode plate 6, third sealing gasket 7, cathode chamber 8, fourth sealing gasket 9, anode chamber 12, sealing gasket, anode plate 14, seventh sealing gasket 15, anode cooling jacket 16, eighth sealing gasket 17, anode side pipe plate 18, anode side end pressure plate 19. At this time, it is a diaphragm-free electrolyzer 10, the cathode chamber 8 of the assembly 8 and the anode chamber 12 of the assembly 12 are an integral electrolytic chamber, and bipolar plates can also be stacked in the electrolytic chamber as needed to expand the electrolysis area. At this time, for a single reaction unit, it is a double-channel feed and double-channel discharge, and cooling jackets are respectively configured on the cathode side and the anode side to control the reaction temperature.

[0051] Preferably, the diaphragm 10 electrolyzer without cooling jacket: installation components cathode side end pressure plate 1, cathode side pipe plate 2, first sealing gasket 3, cathode plate 6, third sealing gasket 7, cathode chamber 8, fourth sealing gasket 9, diaphragm 10, fifth sealing gasket 11, anode chamber 12, sealing gasket, anode plate 14, seventh sealing gasket 15, anode side pipe plate 18, anode side end pressure plate 19. At this time, the diaphragm 10 electrolyzer without cooling jacket meets the reaction requirements that are insensitive to reaction temperature control, including industrial production or experimental exploration.

[0052] Preferably, the diaphragm-free electrolytic cell 10 without cooling jacket: installation components cathode side end pressure plate 1, cathode side pipe plate 2, first sealing gasket 3, cathode plate 6, third sealing gasket 7, cathode chamber 8, fourth sealing gasket 9, anode chamber 12, sealing gasket, anode plate 14, seventh sealing gasket 15, anode side pipe plate 18, anode side end pressure plate 19. At this time, the diaphragm-free electrolytic cell 10 without cooling jacket meets the reaction requirements that are insensitive to reaction temperature control, including industrial production or experimental exploration.

[0053] The specific description of the present invention in the above embodiments is only for further illustration of the present invention and should not be construed as a limitation on the protection scope of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the content of the above invention fall within the protection scope of the present invention.

Claims

1. A plate-frame electrolytic cell for organic electrochemical synthesis, characterized in that The electrolytic cell includes a plurality of reaction units. Each reaction unit includes a cathode chamber and an anode chamber. A cathode plate and cathode liquid are provided in the cathode chamber, and an anode plate and anode liquid are provided in the anode chamber. The cathode plate is connected to the cathode of an external DC power supply, and the anode plate is connected to the anode of the external DC power supply. A cathode cooling jacket is provided on the side of the cathode chamber, and an anode cooling jacket is provided on the side of the anode chamber. The cathode cooling jacket is provided with a cathode-side cooling c flow channel for introducing a cooling medium to control the reaction temperature of the cathode chamber, and the anode cooling jacket is provided with an anode-side cooling d flow channel for introducing a cooling medium to control the reaction temperature of the anode chamber. On one side of the cathode chamber, there is a cathode-side connection pipe plate, and on one side of the anode chamber, there is an anode-side connection pipe plate. Both the cathode-side connection pipe plate and the anode-side connection pipe plate are provided with a double-flow inlet for the cathode liquid a flow channel and the anode liquid b flow channel, and a double-flow outlet for the cathode-side cooling c flow channel and the anode-side d flow channel.

2. The plate-frame type electrolytic cell for organic electrochemical synthesis according to claim 1, wherein a diaphragm is provided between the anode chamber and the cathode chamber. The cathode liquid enters the cathode chamber through the cathode liquid a1 interface, and the anode liquid enters the anode chamber through the cathode liquid b1 interface. A reduction reaction occurs in the cathode chamber, and an oxidation reaction occurs in the anode chamber. Ions migrate through the diaphragm, and the reacted cathode liquid and anode liquid flow out from the cathode liquid a2 interface and the anode liquid b2 interface of the anode-side connection pipe plate respectively.

3. The plate-frame type electrolytic cell for organic electrochemical synthesis according to claim 1, wherein the anode chamber and the cathode chamber are directly connected and communicated to form an integral electrolytic chamber, so that the electrolytic cell becomes a diaphragm-free plate-frame type electrolytic cell. At this time, the electrolyte enters and exits the electrolytic chamber through the a flow channel and the b flow channel, forming a double-flow channel structure to improve the fluid efficiency and the mass transfer and heat transfer effects. A plurality of bipolar plates are provided in the electrolytic chamber to form a bipolar plate stack to increase the electrolytic area.

4. The plate-frame type electrolytic cell for organic electrochemical synthesis according to claim 2 or 3, wherein the reaction unit is formed by pressing a plurality of functional components into a plate-frame structure through fastening bolts and end pressing plates. Sealing gaskets are provided between the plurality of functional components. The functional components include a cathode plate, an anode plate, a cathode cooling jacket, an anode cooling jacket, a cathode-side connection pipe plate, and an anode-side connection pipe plate, or the functional components include a cathode plate, an anode plate, a cathode cooling jacket, an anode cooling jacket, a cathode-side connection pipe plate, an anode-side connection pipe plate, and a diaphragm.

5. The plate-frame type electrolytic cell for organic electrochemical synthesis according to claim 4, wherein the electrolytic cell implements the following temperature control strategy: The cathode-side cooling c flow channel and the anode-side cooling d flow channel are arranged independently to ensure that the temperature control of the cathode chamber and the anode chamber does not interfere with each other; Cooling media are provided in both the cathode-side cooling c flow channel and the anode-side cooling d flow channel. Flow control valves are provided at the inlets of the cathode-side cooling c flow channel and the anode-side cooling d flow channel to adjust the temperature by adjusting the flow rate of the cooling medium; Two temperature sensors are respectively provided inside the cathode chamber and the anode chamber, and the two temperature sensors are symmetrically arranged on both sides of the cathode plate or the anode plate; According to the PID control algorithm, the deviation between the temperature sensor feedback temperature and the preset value is calculated, and the cooling medium flow rate and the cooling medium temperature are dynamically adjusted; Set the ambient temperature compensation algorithm to automatically adjust the cooling medium parameters according to the ambient temperature changes; According to the preset machine learning model, historical temperature data and reaction parameters are analyzed to predict the impact of equipment aging or failure on temperature control and issue early warnings.

6. The plate-and-frame electrolytic cell for organic electrochemical synthesis according to claim 5, wherein the dynamically adjusting the temperature of the cooling medium comprises: A plate heat exchanger is connected in series in the cooling medium circulation loop, and the temperature of the cooling medium entering the electrolyzer is controlled by adjusting the medium flow on the cold and hot sides of the heat exchanger; A multi-stage series temperature control unit is set up to adjust the temperature of the cooling medium step by step to achieve temperature gradient control between the cathode chamber and the anode chamber.

7. A plate-and-frame electrolyzer for organic electrochemical synthesis according to claim 6, wherein the cathode cooling jacket, anode cooling jacket, cathode chamber and anode chamber are made of polypropylene or polytetrafluoroethylene.

8. According to the plate-and-frame electrolytic cell for organic electrochemical synthesis of claim 7, the end pressure plate comprises a cathode side end pressure plate and an anode side end pressure plate, and the cathode side end pressure plate and the anode side end pressure plate are made of stainless steel, polypropylene, polytetrafluoroethylene or polysulfone. 9 . The plate-and-frame electrolytic cell for organic electrochemical synthesis according to claim 8 , wherein the cathode side connecting plate and the anode side connecting plate are made of stainless steel, polypropylene, polytetrafluoroethylene or polysulfone. 10 . The plate-and-frame electrolytic cell for organic electrochemical synthesis according to claim 9 , wherein the diaphragm is made of an ion membrane.

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