2, 5-furandicarboxylic acid synthesis device and synthesis equipment

Abstract

The utility model provides a 2, 5-furandicarboxylic acid synthesis device and synthesis equipment, and relates to the technical field of electrochemical synthesis and catalysis. Comprising at least one reaction structure, a cooling circulation structure and an end plate, wherein the reaction structure comprises an anode plate, a cathode plate, an anode and a cathode; the anode plate and the cathode plate are oppositely arranged and jointly form a containing cavity; the anode plate is provided with a reactant contact net; the anode plate is provided with a feeding hole, and the feeding hole is communicated with the accommodating cavity through a reactant contact net; the anode and the cathode are arranged in the accommodating cavity, the anode is close to the reactant contact net, and the cathode is close to the cathode plate; the cooling circulation structure is arranged on the side, away from the cathode plate, of the anode plate and at least used for cooling the reaction structure. While the reaction system is amplified, a reaction substrate can be quickly converted into a target product, the generation of non-Faraday reaction products is reduced, the product selectivity is improved, and high yield and continuous production are realized.

Description

Technical Field

[0001] The present application relates to the field of electrochemical synthesis and catalysis technology, and in particular to a 2,5-furandicarboxylic acid synthesis device and synthesis equipment. Background Art

[0002] Because 2,5-furandicarboxylic acid has a conjugated carbon ring and diacid structure similar to petroleum-based terephthalic acid, it can replace terephthalic acid in the synthesis of bio-based furan polyesters with better thermal stability and gas barrier properties, significantly reducing the polyester industry's heavy dependence on fossil resources.

[0003] 2,5-Furandicarboxylic acid is typically synthesized from 5-hydroxymethylfurfural via catalytic oxidation. Compared to traditional thermocatalytic methods that require precious metal catalysts, high temperature and pressure, and rely on chemical potential as the driving force, electrocatalytic oxidation utilizes electrode potential as the primary driving force, offering a novel, greener and more efficient synthesis method.

[0004] However, the related art process for producing 2,5-furandicarboxylic acid by electrocatalytic oxidation of 5-hydroxymethylfurfural is mostly carried out in a batch reaction device with a small reaction volume, which cannot be produced continuously and produces a large amount of non-Faradaic by-products, affecting the selectivity of 2,5-furandicarboxylic acid. Utility Model Content

[0005] The embodiments of the present application provide a 2,5-furandicarboxylic acid synthesis device and synthesis equipment to solve the problems of the related art electrocatalytic oxidation process for producing 2,5-furandicarboxylic acid, such as small reaction volume, inability to produce continuously, and generation of a large amount of non-faradaic by-products, which affects the selectivity of 2,5-furandicarboxylic acid.

[0006] In a first aspect, the present application provides a 2,5-furandicarboxylic acid synthesis device, comprising at least one reaction structure, a cooling circulation structure, and an end plate, wherein a third gasket is disposed between the reaction structure and the end plate, and the reaction structure comprises an anode plate, a cathode plate, an anode, and a cathode;

[0007] The anode plate and the cathode plate are arranged opposite to each other, and the anode plate and the cathode plate together form a receiving cavity;

[0008] The anode plate is provided with a reactant contact network; the anode plate is provided with a feed port, and the feed port is connected to the accommodating cavity through the reactant contact network;

[0009] The anode and cathode are arranged in the accommodation cavity, the anode is close to the reactant contact network, and the cathode is close to the cathode plate;

[0010] The cooling circulation structure is arranged on the side of the anode plate away from the cathode plate, and the cooling circulation structure is at least used to cool the reaction structure.

[0011] In some embodiments of the present application, the reaction structure further comprises an anion exchange membrane;

[0012] The first surface of the anion exchange membrane contacts the cathode, and the second surface of the anion exchange membrane contacts the anode.

[0013] In some embodiments of the present application, the anode plate is provided with a discharge port, which is communicated with the accommodating cavity;

[0014] The discharge port is arranged on the opposite side of the feed port, and the discharge port is arranged above the feed port.

[0015] In some embodiments of the present application, the reaction structure includes a first gasket;

[0016] The inner side of the first gasket is used to enclose at least a portion of the accommodating cavity, and the inner side of the first gasket is fixedly connected to the anode.

[0017] In some embodiments of the present application, the reaction structure includes a second gasket, which is located on a side of the first gasket facing the cathode plate, and the inner side of the second gasket is used to enclose at least a portion of the accommodating cavity;

[0018] An anion exchange membrane is fixed between the first gasket and the second gasket, and the area of ​​the anion exchange membrane is larger than the inner area of ​​the second gasket.

[0019] In some embodiments of the present application, the cathode is disposed on the inner side of the second gasket, and the cathode is in contact with the surface of the anion exchange membrane facing the cathode plate.

[0020] In some embodiments of the present application, the reaction structure includes an anode gas diffusion layer, which is disposed between the anode plate and the anode;

[0021] And / or, the reaction structure includes a cathode gas diffusion layer, which is disposed between the cathode plate and the cathode.

[0022] In some embodiments of the present application, the anode plate is reused to form a cooling cycle structure;

[0023] The anode plate forms a circulation cavity, and the circulation cavity is used to accommodate at least a cooling liquid.

[0024] In some embodiments of the present application, when the number of reaction structures is set to multiple, the multiple reaction structures are set in sequence.

[0025] In a second aspect, the present application provides a 2,5-furandicarboxylic acid synthesis device, including a 2,5-furandicarboxylic acid synthesis unit.

[0026] The 2,5-furandicarboxylic acid synthesis device and synthesis equipment provided in the embodiment of the present application include at least one reaction structure, a cooling circulation structure and an end plate, a third gasket is provided between the reaction structure and the end plate, the reaction structure includes an anode plate, a cathode plate, an anode and a cathode; the anode plate and the cathode plate are arranged relative to each other, and the anode plate and the cathode plate together form a receiving chamber; the anode plate is provided with a reactant contact network; the anode plate is provided with a feed port, and the feed port is connected to the receiving chamber through the reactant contact network; the anode and the cathode are arranged in the receiving chamber, the anode is close to the reactant contact network, and the cathode is close to the cathode plate; the cooling circulation structure is provided on the side of the anode plate away from the cathode plate, and the cooling circulation structure is at least used to cool the reaction structure. While achieving the amplification of the reaction system, the reaction substrate can be quickly converted into the target product, the generation of non-Faraday reaction products can be reduced, the product selectivity can be improved, and a high yield can be achieved, while continuous production can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0028] Figure 1 A first structural schematic diagram of a 2,5-furandicarboxylic acid synthesis device provided in an embodiment of the present application;

[0029] Figure 2 A second structural schematic diagram of the 2,5-furandicarboxylic acid synthesis device provided in an embodiment of the present application;

[0030] Figure 3 A schematic structural diagram of the anode plate of the 2,5-furandicarboxylic acid synthesis device provided in an embodiment of the present application;

[0031] Figure 4 A schematic cross-sectional view of the anode plate of the 2,5-furandicarboxylic acid synthesis device provided in an embodiment of the present application;

[0032] Figure 5 The 2,5-furandicarboxylic acid synthesis device provided in the embodiment of the present application includes a structural schematic diagram of multiple reaction structures;

[0033] Figure 6 This is a schematic diagram of the structure of the 2,5-furandicarboxylic acid synthesis equipment provided in the examples of the present application. Description of the drawings:

[0035] 100-reaction structure;

[0036] 1- anode plate; 101- feed port; 102- discharge port;

[0037] 103 - liquid inlet; 104 - liquid outlet; 105 - anode tab; 106 - circulation chamber;

[0038] 2- cathode plate; 201- cathode gas outlet; 202- serpentine track; 203- cathode tab;

[0039] 3-anode; 4-cathode; 5-reactant contact network; 6-anion exchange membrane;

[0040] 7-first gasket; 8-second gasket;

[0041] 9-anode gas diffusion layer; 10-cathode gas diffusion layer;

[0042] 11-third gasket; 12-anode end plate; 13-cathode end plate;

[0043] 200-2,5-furandicarboxylic acid synthesis unit;

[0044] 300-Raw material unit;

[0045] 400-Product Unit.

[0046] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0047] In the related art, 2,5-furandicarboxylic acid can usually be synthesized from 5-hydroxymethylfurfural through catalytic oxidation. 5-Hydroxymethylfurfural is a biomass-derived compound with wide application potential. The process of producing 2,5-furandicarboxylic acid by electrocatalytic oxidation of 5-hydroxymethylfurfural is mostly carried out in a batch reactor. The batch reactor includes a reaction cell containing an electrolyte and an anode, cathode, and reference electrode immersed in the electrolyte. The anode and cathode are connected to the positive and negative poles of a power supply, respectively. When using it to carry out the electrocatalytic oxidation of 5-hydroxymethylfurfural to produce 2,5-furandicarboxylic acid, the electrolyte and reaction substrate are all placed in the reaction cell. While the catalytic reaction is proceeding, non-Faraday side reactions occur simultaneously. In addition, due to the static reaction mode, the reaction needs to be carried out in batches and cannot be operated continuously.

[0048] Scaling up the reaction system can be achieved by increasing the concentrations of the electrolyte and reaction substrates, as well as increasing the reaction volume. Increasing the reaction volume and material concentration, while simultaneously expanding the scale of the electrocatalytic oxidation reaction system, also produces a large number of non-Faradaic byproducts. Therefore, batch reactors cannot achieve this scale-up. Furthermore, since the electrocatalytic oxidation process for 5-HMF typically utilizes an alkaline electrolyte, 5-HMF is unstable in alkaline environments. When mixed with an alkaline electrolyte, it undergoes Cannizzaro and polymerization reactions, generating organic acids and polymers. Under high temperature conditions, 5-HMF degrades more rapidly, becoming more prone to condensation reactions, producing dark-colored humins.

[0049] Therefore, simply scaling up the existing batch reaction device and applying it to the industrial production of 2,5-furandicarboxylic acid by electrocatalytic oxidation of 5-hydroxymethylfurfural will inevitably lead to non-Faradaic side reactions, which will affect the selectivity of 2,5-furandicarboxylic acid and make continuous production impossible.

[0050] In view of this, the present application provides a 2,5-furandicarboxylic acid synthesis device, comprising at least one reaction structure, a cooling circulation structure and an end plate, a third gasket being provided between the reaction structure and the end plate, the reaction structure comprising an anode plate, a cathode plate, an anode and a cathode; the anode plate and the cathode plate being arranged relative to each other, the anode plate and the cathode plate together forming a receiving chamber; the anode plate being provided with a reactant contact network; the anode plate being provided with a feed port, the feed port being connected to the receiving chamber through the reactant contact network; the anode and the cathode being provided in the receiving chamber, the anode being close to the reactant contact network, and the cathode being close to the cathode plate; the cooling circulation structure being provided on the side of the anode plate facing away from the cathode plate, the cooling circulation structure being used at least to cool the reaction structure. While achieving amplification of the reaction system, the reaction substrate can be quickly converted into the target product, the generation of non-Faraday reaction products can be reduced, the product selectivity can be improved, a high yield can be achieved, and continuous production can be achieved at the same time.

[0051] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0052] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0053] See also Figure 1-Figure 2 The present application provides a 2,5-furandicarboxylic acid synthesis device 200, which includes at least one reaction structure, a cooling circulation structure and an end plate. A third gasket 11 is arranged between the reaction structure and the end plate. The reaction structure includes an anode plate 1, a cathode plate 2, an anode 3 and a cathode 4.

[0054] In some embodiments of the present application, the end plate includes an anode end plate 12 and a cathode end plate 13. Each anode end plate 12 and cathode end plate 13 are provided in pairs. Anode end plate 12 is connected to anode plate 1, with a third gasket 11 disposed between them. Cathode end plate 13 is connected to cathode plate 2, with a third gasket 11 disposed between them.

[0055] In some embodiments of the present application, the anode 3 is connected to the positive electrode of the DC power supply through an anode wire, and the cathode 4 is connected to the negative electrode of the DC power supply through a cathode wire.

[0056] In some embodiments of the present application, a raised anode tab 105 is provided on the top of the anode plate 1 for connecting to an anode terminal block of an anode wire, and a raised cathode tab 203 is provided on the top of the cathode plate 2 for connecting to a cathode terminal block of a cathode wire. Anode tab 105 and cathode tab 203 are arranged with a staggered orientation relative to each other.

[0057] In some embodiments of the present application, the anode plate 1 and the cathode plate 2 are arranged opposite to each other, and the anode plate 1 and the cathode plate 2 together form a receiving cavity.

[0058] In some embodiments of the present application, the anode plate 1 is provided with a reactant contact mesh 5; the anode plate 1 is provided with a feed port 101, which is connected to the receiving chamber through the reactant contact mesh 5. Specifically, an anode reaction chamber is provided on the side of the anode plate 1 facing the cathode plate 2, and the reactant contact mesh 5 is disposed within the anode reaction chamber. A reaction flow channel is formed on the reactant contact mesh 5, and the feed port 101 is connected to the anode reaction chamber. Reaction raw materials enter the anode reaction chamber through the feed port 101, wherein the reaction raw materials include 5-hydroxymethylfurfural and alkali solution.

[0059] In some embodiments of the present application, the reactant contact network 5 can be fixedly connected to the anode plate 1 by welding or plugging.

[0060] In some embodiments of the present application, the anode plate 1 and the reactant contact network 5 can be an integrated structure. For example, the reactant contact network 5 can be formed on the anode plate 1 by etching. In some embodiments of the present application, the anode 3 and the cathode 4 are arranged in the accommodation cavity, with the anode 3 close to the reactant contact network 5 and the cathode 4 close to the cathode plate 2.

[0061] The anode 3 may include an anode conductive substrate and an anode catalyst layer supported on the anode conductive substrate. The anode catalyst layer may be attached to the anode conductive substrate by electrochemical methods, hydrothermal methods, spraying, etc. The anode conductive substrate faces the anode plate 1 .

[0062] The cathode 4 includes a cathode conductive substrate and a cathode catalyst layer supported on the cathode conductive substrate. The cathode catalyst layer can be attached to the cathode conductive substrate by electrochemical methods, hydrothermal methods, spraying, etc. The cathode conductive substrate faces the cathode plate 2.

[0063] In some embodiments of the present application, a cooling circulation structure is disposed on the side of the anode plate 1 facing away from the cathode plate 2. The cooling circulation structure is used to cool at least the reaction structure. Specifically, an antifreeze solution is circulated through the cooling circulation structure. The cooling chamber of the cooling circulation structure is located adjacent to the anode plate 1 to maintain the anode reaction temperature at approximately 20°C, thereby slowing the degradation rate of the reaction raw material 5-hydroxymethylfurfural and reducing the occurrence of condensation reactions.

[0064] See also Figure 1-Figure 3 In some embodiments of the present application, the cooling cycle structure includes a liquid inlet 103 and a liquid outlet 104. The coolant enters the cooling cycle structure from the liquid inlet 103 and flows out of the cooling cycle structure from the liquid outlet 104 to cool the anode.

[0065] In some embodiments of the present application, a cavity without a flow channel is provided in the cooling circulation structure. The cavity of the cooling circulation structure is respectively connected to the liquid inlet 103 and the liquid outlet 104. The cooling liquid is introduced into the cavity of the cooling circulation structure through the liquid inlet 103.

[0066] In some embodiments of the present application, the liquid inlet 103 and the liquid outlet 104 are located on two opposite sides of the cooling circulation structure. The liquid inlet 103 can be located at the lower end of the cooling circulation structure, and the liquid outlet 104 can be located at the upper end of the cooling circulation structure, that is, the liquid inlet 103 and the liquid outlet 104 are arranged diagonally.

[0067] See also Figure 1-Figure 2 In some embodiments of the present application, the reaction structure further includes an anion exchange membrane 6. The anion exchange membrane 6 is a membrane material that can selectively conduct anions while blocking cations. The basic structure of the anion exchange membrane is generally composed of a polymer matrix containing fixed cationic groups (such as quaternary ammonium groups). These cationic groups can attract and fix anions, thereby allowing anions to pass through the membrane. Specifically, the anion exchange membrane 6 is used to conduct hydroxide (OH-) ions during the reaction process, and the anion exchange membrane 6 allows hydroxide (OH-) ions to pass through.

[0068] In some embodiments of the present application, the first surface of the anion exchange membrane 6 contacts the cathode 4, and the second surface of the anion exchange membrane 6 contacts the anode 3, so as to achieve normal positive and negative electrode reactions.

[0069] See also Figure 1-Figure 3 In some embodiments of the present application, the anode plate 1 is provided with a discharge port 102 , which is in communication with the accommodating cavity. Anode reaction products can be discharged through the discharge port 102 .

[0070] In some embodiments of the present application, the discharge port 102 is disposed on opposite sides of the feed port 101, with the discharge port 102 disposed above the feed port 101. Specifically, the discharge port 102 and the feed port 101 are located on opposite sides of the anode plate 1, with the feed port 101 located at the lower end of the anode plate 1 and the discharge port 102 located at the upper end of the anode plate 1, i.e., the feed port 101 and the discharge port 102 are disposed diagonally. The reaction raw materials enter the anode reaction chamber through the feed port 101 for reaction, and the reaction products are discharged through the discharge port 102.

[0071] Specifically, the reaction raw materials enter the anode reaction chamber through the feed port 101 of the reaction structure, and after reacting on the reactant contact network 5, they reach the top of the anode reaction chamber, and the reaction products are discharged through the discharge port 102 of the reaction structure.

[0072] See also Figure 1-Figure 2 In some embodiments of the present application, the reaction structure includes a first gasket 7. The inner side of the first gasket 7 is used to enclose at least part of the accommodating cavity, and the inner side of the first gasket 7 is fixedly connected to the anode 3. Specifically, a through hole is provided in the middle of the first gasket 7, and the anode 3 is fixed in the through hole of the first gasket 7. The first gasket 7 plays a sealing role, and the number of the first gaskets 7 can be adjusted according to the actual sealing situation. For example, the first gasket 7 can be two or three pieces.

[0073] See also Figure 1-Figure 2 In some embodiments of the present application, the reaction structure includes a second gasket 8, which is located on the side of the first gasket 7 facing the cathode plate 2. The inner side of the second gasket 8 is used to enclose at least part of the accommodating cavity. A through hole is provided in the middle of the second gasket 8, and the cathode 4 is fixed in the through hole of the second gasket 8. The second gasket 8 plays a sealing role, and the number of the second gaskets 8 can be adjusted according to the actual sealing situation. For example, the second gasket 8 can be two or three.

[0074] In some embodiments of the present application, an anion exchange membrane 6 is fixed between the first gasket 7 and the second gasket 8, and the area of ​​the anion exchange membrane 6 is larger than the inner area of ​​the second gasket 8. Specifically, the anion exchange membrane 6 is disposed between the first gasket 7 and the second gasket 8, the through-holes of the first gasket 7 and the through-holes of the second gasket 8 are the same size, and the area of ​​the anion exchange membrane 6 is larger than the through-hole area of ​​the first gasket 7 and the through-hole area of ​​the second gasket 8, so that the anion exchange membrane 6 can completely cover the through-holes of the first gasket 7 and the through-holes of the second gasket 8.

[0075] In some embodiments of the present application, the first gasket 7 and the second gasket 8 have the same structure, and the first gasket 7 and the second gasket 8 have the same size.

[0076] In some embodiments of the present application, the anode plate 1, the cathode plate 2, the first gasket 7, the second gasket 8, the third gasket 11, the anode end plate 12 and the cathode end plate 13 are all provided with multiple connecting through holes along the edges, and the components are fastened together by connecting through holes and bolts to complete the assembly.

[0077] In some embodiments of the present application, the anode plate 1, cathode plate 2, first gasket 7, second gasket 8, third gasket 11, anode end plate 12, and cathode end plate 13 may all be rectangular structures. The anode 3 and cathode 4 may also be rectangular structures.

[0078] See also Figure 1-Figure 2 In some embodiments of the present application, the cathode 4 is disposed on the inner side of the second gasket 8 , and the cathode 4 is in contact with the surface of the anion exchange membrane 6 facing the cathode plate 2 .

[0079] See also Figure 1-Figure 2 In some embodiments of the present application, the reaction structure includes an anode gas diffusion layer 9, which is disposed between the anode plate 1 and the anode 3. A first end of the anode gas diffusion layer 9 is disposed in the anode reaction chamber of the anode plate 1, and a second end of the anode gas diffusion layer 9 is disposed in the through hole of the first gasket 7.

[0080] In some embodiments of the present application, the anode gas diffusion layer 9 may be a mesh structure, and the material of the anode gas diffusion layer 9 may be nickel foam. The anode gas diffusion layer 9 facilitates the diffusion of the reaction raw materials.

[0081] See also Figure 1-Figure 2 In some embodiments of the present application, a cathode gas outlet 201 is provided on the top of the cathode plate 2, and a cathode reaction chamber is provided on the side of the cathode plate 2 facing the anode plate 1. The cathode reaction chamber is connected to the cathode gas outlet 201, and the hydrogen generated by the cathode 4 is discharged through the cathode gas outlet 201.

[0082] See also Figure 1-Figure 2In some embodiments of the present application, a serpentine track 202 is provided in the cathode reaction chamber. The hydrogen generated by the cathode 4 is collected by the serpentine track 202 and then discharged through the cathode gas outlet 201.

[0083] See also Figure 1-Figure 2 In some embodiments of the present application, the reaction structure includes a cathode gas diffusion layer 10, which is disposed between the cathode plate 2 and the cathode 4. A first end of the cathode gas diffusion layer 10 is disposed in the cathode reaction chamber, and a second end of the cathode gas diffusion layer 10 is disposed in a through hole of the second gasket 8. The cathode gas diffusion layer 10 facilitates diffusion of the reaction raw materials.

[0084] In some embodiments of the present application, the cathode gas diffusion layer 10 may be titanium felt (foamed titanium).

[0085] In some embodiments of the present application, the anode gas diffusion layer 9 and the cathode gas diffusion layer 10 may be rectangular structures.

[0086] See also Figures 1-4 In some embodiments of the present application, the anode plate 1 is reused to form a cooling circulation structure. A circulation cavity 106 is formed on the side of the anode plate 1 facing away from the cathode plate 2. The circulation cavity 106 is used to accommodate at least a coolant. Specifically, a liquid inlet 103 and a liquid outlet 104 are provided on the anode plate 1. The coolant enters the circulation cavity 106 of the anode plate 1 through the liquid inlet 103 and flows out of the circulation cavity 106 through the liquid outlet 104, thereby cooling the anode.

[0087] See also Figure 1-Figure 2 and Figure 5 In some embodiments of the present application, when the number of reaction structures is set to multiple, multiple reaction structures are set in sequence. The discharge port 102 of the previous reaction structure is connected to the feed port 101 of the next reaction structure, and the reaction product of the previous reaction structure is passed into the next reaction structure to continue the reaction. Specifically, the reaction raw materials enter the anode reaction chamber through the feed port 101 of the first reaction structure, and the reaction raw materials reach the top of the anode reaction chamber after reacting on the reactant contact network 5. The reaction products are discharged through the discharge port 102 of the first reaction structure and then passed into the feed port 101 of the next reaction structure to continue the reaction, and are discharged from the discharge port 102 of the last reaction structure.

[0088] In some embodiments of the present application, when the number of reaction structures is set to multiple, the hydrogen discharged from the cathode gas outlets 201 of multiple cathode plates 2 can be collected through a hydrogen pipeline and fed into a gas product storage tank.

[0089] In some embodiments of the present application, when the number of reaction structures is set to multiple, a third gasket 11 is provided between the cathode plate 2 of the previous reaction structure and the anode plate 1 of the next reaction structure to achieve insulation.

[0090] In some embodiments of the present application, when the number of reaction structures is set to multiple, the cathode plate 2 of the previous reaction structure and the anode plate 1 of the next reaction structure are designed as an integrated whole, and a ceramic insulating layer or other insulating layer is provided between the cathode plate 2 of the previous reaction structure and the anode plate 1 of the next reaction structure.

[0091] In some embodiments of the present application, through holes may be provided on the anode plate 1 and the cathode plate 2, which may be used to separately connect wires to monitor the real-time voltage of a single reaction structure.

[0092] In some embodiments of the present application, the DC power supply is an adjustable current-stabilized and voltage-stabilized DC power supply.

[0093] In some embodiments of the present application, the anode plate 1 and the cathode plate 2 may be made of metals such as nickel, iron or titanium.

[0094] In some embodiments of the present application, the thickness of the first gasket 7, the second gasket 8 and the third gasket 11 is 0.02 cm to 0.5 cm, and the first gasket 7, the second gasket 8 and the third gasket 11 can be made of materials such as tetrafluoroethylene, silicone, and fluororubber.

[0095] In some embodiments of the present application, the area of ​​the anode 3 and the cathode 4 is 100 cm 2 .

[0096] Second, see Figures 1-6 The present application provides a 2,5-furandicarboxylic acid synthesis apparatus, comprising a 2,5-furandicarboxylic acid synthesis unit 200. The 2,5-furandicarboxylic acid synthesis apparatus further comprises a feedstock unit 300 and a product unit 400. The feedstock unit 300 provides 5-hydroxymethylfurfural and alkali solution to the anode plate 1 of the 2,5-furandicarboxylic acid synthesis unit 200. The product unit 400 is used to collect anode products and cathode products.

[0097] For example, a stack device consisting of 6 reaction structures can be used for the catalytic oxidation of 5-hydroxymethylfurfural to produce 2,5-furandicarboxylic acid. The concentration of the 5-hydroxymethylfurfural aqueous solution is 4.2 mol / L, the alkaline electrolyte is potassium hydroxide with a concentration of 5.7 mol / L, and the 5-hydroxymethylfurfural and potassium hydroxide solutions are injected into the stack device for continuous reaction at a flow rate of 1:2. The area of ​​the anode 3 and the cathode 4 are both 100 cm 2 The anode is a 12.5cm*8.2cm nickel foam-supported nickel-cobalt electrode (NiCo / NF), and the cathode is a 12.5cm*8.2cm carbon paper-supported ruthenium oxide electrode. At a current of 60A, it can achieve an electrical power target of >1kW, a 5-hydroxymethylfurfural conversion of >95%, and a product selectivity of >95% for 2,5-furandicarboxylic acid.

[0098] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "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 this application 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 should not be understood as a limitation on this application.

[0099] In the description of this application, it should be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products or apparatuses.

[0100] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," etc. should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integration. They can be directly connected or indirectly connected through an intermediate medium. They can also refer to internal connections between two elements or interactions between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A 2,5-furandicarboxylic acid synthesis device, characterized in that, The invention comprises at least one reaction structure (100), a cooling circulation structure and an end plate, wherein a third gasket (11) is provided between the reaction structure (100) and the end plate, and the reaction structure (100) comprises an anode plate (1), a cathode plate (2), an anode (3) and a cathode (4); The anode plate (1) and the cathode plate (2) are arranged opposite to each other, and the anode plate (1) and the cathode plate (2) together form a receiving cavity; The anode plate (1) is provided with a reactant contact network (5); the anode plate (1) is provided with a feed port (101), and the feed port (101) is communicated with the accommodating cavity through the reactant contact network (5); The anode (3) and the cathode (4) are arranged in the accommodating cavity, the anode (3) is close to the reactant contact network (5), and the cathode (4) is close to the cathode plate (2); The cooling circulation structure is arranged on a side of the anode plate (1) away from the cathode plate (2), and the cooling circulation structure is at least used to cool the reaction structure (100).

2. The 2,5-furandicarboxylic acid synthesis device according to claim 1, characterized in that: The reaction structure (100) further includes an anion exchange membrane (6); A first surface of the anion exchange membrane (6) contacts the cathode (4), and a second surface of the anion exchange membrane (6) contacts the anode (3).

3. The 2,5-furandicarboxylic acid synthesis device according to claim 2, characterized in that The anode plate (1) is provided with a discharge port (102), and the discharge port (102) is communicated with the accommodating cavity; The discharge port (102) is arranged on the opposite side of the feed port (101), and the discharge port (102) is arranged above the feed port (101).

4. The 2,5-furandicarboxylic acid synthesis device according to claim 2, characterized in that: The reaction structure (100) includes a first gasket (7); The inner side of the first gasket (7) is used to enclose at least part of the accommodating cavity, and the inner side of the first gasket (7) is fixedly connected to the anode (3).

5. The 2,5-furandicarboxylic acid synthesis device according to claim 4, characterized in that: The reaction structure (100) comprises a second gasket (8), the second gasket (8) being located on a side of the first gasket (7) facing the cathode plate (2), and the inner side of the second gasket (8) being used to enclose at least a portion of the accommodating cavity; The anion exchange membrane (6) is fixed between the first gasket (7) and the second gasket (8), and the area of ​​the anion exchange membrane (6) is larger than the inner area of ​​the second gasket (8).

6. The 2,5-furandicarboxylic acid synthesis device according to claim 5, characterized in that: The cathode (4) is arranged on the inner side of the second gasket (8), and the cathode (4) is in contact with the surface of the anion exchange membrane (6) facing the cathode plate (2).

7. The 2,5-furandicarboxylic acid synthesis device according to claim 1, characterized in that: The reaction structure (100) comprises an anode gas diffusion layer (9), wherein the anode gas diffusion layer (9) is arranged between the anode plate (1) and the anode (3); And / or, the reaction structure (100) includes a cathode gas diffusion layer (10), and the cathode gas diffusion layer (10) is arranged between the cathode plate (2) and the cathode (4).

8. The 2,5-furandicarboxylic acid synthesis device according to any one of claims 1 to 7, characterized in that: The anode plate (1) is reused to form the cooling cycle structure; The anode plate (1) forms a circulation cavity (106), and the circulation cavity (106) is at least used to accommodate cooling liquid.

9. The 2,5-furandicarboxylic acid synthesis device according to any one of claims 1 to 7, characterized in that: When the number of the reaction structures (100) is set to be multiple, the multiple reaction structures (100) are arranged in sequence.

10. A 2,5-furandicarboxylic acid synthesis device, characterized in that: The invention comprises the 2,5-furandicarboxylic acid synthesis device according to any one of claims 1 to 9.

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