Electrochemical device for producing tetrapropylammonium hydroxide

Abstract

The utility model discloses an electrochemical device for producing tetrapropylammonium hydroxide, which belongs to the technical field of chemical industrial extraction and comprises an extraction container, an extraction chamber is arranged in the extraction container and comprises a plurality of membrane stack units, and an anode plate and a cathode plate are respectively arranged on two sides of each membrane stack unit. The membrane stack unit comprises a salt product chamber, a salt raw material chamber, an alkali product chamber and an alkali raw material chamber which are formed by sequentially arranging partition plates, anion exchange membranes, partition plates and cation exchange membranes; a storage tank is arranged on one side or at the bottom of the extraction container, and a heat exchanger is arranged in the storage tank. Through the design of the membrane stack unit, the electrolysis process is accelerated, the production efficiency of tetrapropylammonium hydroxide is improved, the vortex hot membrane heat exchanger is adopted, the heat exchange efficiency is improved, and the energy consumption loss caused by improper temperature control is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of chemical industrial extraction technology, specifically relating to an electrochemical device for the production of tetrapropylammonium hydroxide. Background Technology

[0002] Tetrapropylammonium hydroxide (TPAOH) is a key organic base with wide applications in the chemical industry, especially in the synthesis of molecular sieves and zeolites, where it plays a crucial role as an alkali source and template agent. Traditional TPAOH production methods have many limitations, including low production efficiency, high energy consumption, insufficient product purity, and the potential introduction of impurity ions during production, leading to reduced product purity and making it difficult to meet the high standards required for industrial applications.

[0003] To overcome these problems and improve the production efficiency and purity of TPAOH while reducing energy consumption and production costs, the industry has been exploring more efficient and environmentally friendly production technologies. Among them, electrolysis has attracted much attention due to its high efficiency and high selectivity. However, existing electrolysis equipment designs have shortcomings, such as unreasonable internal structure design of the electrolysis chamber and inaccurate temperature control, which limit the large-scale application of electrolysis in TPAOH production. Summary of the Invention

[0004] To address the aforementioned problems, this utility model discloses an electrochemical device for the production of tetrapropylammonium hydroxide. The device features a reasonable structural design, facilitating assembly and maintenance. A temperature control component ensures precise control of the extraction chamber temperature, improving the production efficiency and purity of tetrapropylammonium hydroxide. In-situ sensors enable real-time monitoring of the production process, enhancing the level of automation.

[0005] To achieve the above objectives, the specific technical solution of this application is as follows:

[0006] An electrochemical device for the production of tetrapropylammonium hydroxide includes an extraction vessel containing an extraction chamber. The extraction chamber comprises several membrane stack units, with an anode plate and a cathode plate respectively located on opposite sides. Each membrane stack unit consists of a salt product chamber, a salt feedstock chamber, an alkali product chamber, and an alkali feedstock chamber, arranged sequentially from a separator, an anion exchange membrane, a cation exchange membrane, another separator, another anion exchange membrane, and another cation exchange membrane. A storage tank is located on one side or at the bottom of the extraction vessel, and a heat exchanger is installed within the storage tank.

[0007] Based on the above technical features, further, the cation exchange membrane is a perfluorinated composite membrane, a perfluorosulfonic acid membrane, or a perfluorocarboxylic acid membrane; the anion exchange membrane is a quaternary ammonium salt composite anion membrane or a quaternary ammonium salt type anion membrane, and the anion exchange membrane and the cation exchange membrane are homogeneous membranes.

[0008] Based on the above technical features, preferably, the capacity of the salt product chamber, salt raw material chamber, alkali product chamber, and alkali raw material chamber is not less than 5L to ensure sufficient reaction and separation volume.

[0009] Based on the above technical features, preferably, the number of membrane stack units is 5 to 100.

[0010] Based on the above technical features, preferably, the heat exchanger is a vortex heat film heat exchanger, which improves heat exchange efficiency and achieves the functions of corrosion resistance, high temperature resistance, high pressure resistance, and scale prevention.

[0011] Compared with the prior art, the beneficial effects of this application are as follows:

[0012] This application accelerates the electrolysis process and significantly improves the production efficiency of tetrapropylammonium hydroxide through the design of the membrane stack unit. The use of high-efficiency cation exchange membranes and anion exchange membranes effectively prevents the passage of impurity ions, ensuring the high purity of the generated tetrapropylammonium hydroxide. The use of a vortex thermal membrane heat exchanger improves heat exchange efficiency and reduces energy loss caused by improper temperature control. The number of membrane stack units can be adjusted between 5 and 100, allowing the device to flexibly expand or shrink production scale according to production needs, thus improving production flexibility and efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an electrochemical device for the production of tetrapropylammonium hydroxide according to the present invention;

[0014] List of identifiers in attached diagrams:

[0015] 1. Extraction container; 2. Extraction chamber; 3. Anode plate; 4. Cathode plate; 5. Separator; 6. Anion exchange membrane; 7. Cation exchange membrane; 8. Salt product chamber; 9. Salt raw material chamber; 10. Alkali product chamber; 11. Alkali raw material chamber; 12. Storage tank; 13. Heat exchanger. Detailed Implementation

[0016] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0017] It should be noted that the terms "upper," "lower," "left," "right," "front," and "rear" used in the following description refer to the directions shown in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] like Figure 1 As shown, an electrochemical device for the production of tetrapropylammonium hydroxide includes an extraction container 1, which contains an extraction chamber 2. The extraction chamber includes several membrane stack units, and an anode plate 3 and a cathode plate 4 are respectively provided on both sides of the extraction chamber. The anode plate 3 and the anode plate 4 are respectively connected to the positive and negative terminals of a DC power supply. Preferably, the voltage of the DC power supply is 1 to 5.0 volts, and the current density is 1 to 1500 A / m².

[0019] The membrane stack unit comprises a salt product chamber 8, a salt raw material chamber 9, an alkali product chamber 10, and an alkali raw material chamber 11, arranged sequentially from a separator 5, an anion exchange membrane 6, a separator 5, a cation exchange membrane 7, and a separator 5, an anion exchange membrane 6, a separator 5, and a cation exchange membrane 7. A storage tank 12 is provided on one side or at the bottom of the extraction vessel 1, and a heat exchanger 13 is installed within the storage tank.

[0020] Furthermore, the cation exchange membrane 7 is a perfluorinated composite membrane, a perfluorosulfonic acid membrane, or a perfluorocarboxylic acid membrane; the anion exchange membrane 6 is a quaternary ammonium salt composite anion membrane or a quaternary ammonium salt type anion membrane, and both the anion exchange membrane and the cation exchange membrane are homogeneous membranes.

[0021] Preferably, the capacity of the salt product chamber 8, the salt raw material chamber 9, the alkali product chamber 10, and the alkali raw material chamber 11 is not less than 5L to ensure sufficient reaction and separation volume.

[0022] Preferably, the number of membrane stack units is 5 to 100. Preferably, the effective area of ​​a single cation exchange membrane 7 and anion exchange membrane 6 is 10 dm2, and the total number of membrane stack units is 10.

[0023] Preferably, the heat exchanger 13 is a vortex heat film heat exchanger, which improves heat exchange efficiency and achieves the functions of corrosion resistance, high temperature resistance, high pressure resistance, and scale prevention.

[0024] Working principle:

[0025] The tetrapropylammonium hydroxide solution to be treated is introduced into the alkali feed chamber of the extraction vessel. Under the action of DC power, cations and anions migrate directionally through cation exchange membranes and anion exchange membranes, respectively. The salt product chamber, salt feed chamber, alkali product chamber, and alkali feed chamber are effectively separated through the arrangement of membrane stack units. The heat exchanger regulates the temperature of the solution in the storage tank through circulating water pipes to maintain suitable operating conditions. The high-purity tetrapropylammonium hydroxide solution after extraction and separation is discharged from the outlet of the extraction vessel, while impurities are discharged through another outlet or returned to the storage tank.

[0026] It should be noted that the accompanying drawings merely illustrate the technical concept of the present invention and should not be used to limit the scope of protection of the present invention. For those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. An electrochemical device for the production of tetrapropylammonium hydroxide, characterized in that: The extraction container includes an extraction chamber, which comprises several membrane stack units. An anode plate and a cathode plate are respectively located on opposite sides of the extraction chamber. Each membrane stack unit consists of a salt product chamber, a salt raw material chamber, an alkali product chamber, and an alkali raw material chamber, arranged sequentially from a separator, an anion exchange membrane, a separator, a cation exchange membrane, a separator, an anion exchange membrane, a separator, and a cation exchange membrane. A storage tank is located on one side or at the bottom of the extraction container, and a heat exchanger is installed within the storage tank.

2. The electrochemical device for the production of tetrapropylammonium hydroxide according to claim 1, characterized in that: The cation exchange membrane is a perfluorinated composite membrane, a perfluorosulfonic acid membrane, or a perfluorocarboxylic acid membrane; the anion exchange membrane is a quaternary ammonium salt composite anion membrane or a quaternary ammonium salt type anion membrane, and both the anion exchange membrane and the cation exchange membrane are homogeneous membranes.

3. The electrochemical device for the production of tetrapropylammonium hydroxide according to claim 1, characterized in that: The capacity of the salt product room, salt raw material room, alkali product room, and alkali raw material room shall not be less than 5L to ensure sufficient reaction and separation volume.

4. An electrochemical device for the production of tetrapropylammonium hydroxide according to claim 1, characterized in that: The number of membrane stack units is 5 to 100.

5. An electrochemical device for the production of tetrapropylammonium hydroxide according to claim 1, characterized in that: The heat exchanger is a vortex heat film heat exchanger, which improves heat exchange efficiency and achieves the functions of corrosion resistance, high temperature resistance, high pressure resistance, and scale prevention.

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