A catalytic reaction kettle for synthesizing trimethyl orthoformate
By introducing a magnetic stirring device, a liquid separation mechanism, and a dynamic temperature control system into the catalytic reactor, the problems of uneven material mixing, uneven catalyst distribution, and unstable temperature control were solved, achieving efficient mixing and precise temperature regulation in the synthesis of trimethyl orthoformate, thereby improving reaction efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FUSHUN SHUNTE CHEM
- Filing Date
- 2026-04-01
- Publication Date
- 2026-06-16
AI Technical Summary
Existing catalytic reactors suffer from problems such as uneven material mixing, uneven catalyst distribution, inaccurate injection of key materials, and unstable temperature control during the synthesis of trimethyl orthoformate, which affect reaction efficiency and product yield.
The stirring device, liquid distribution mechanism, and dynamic temperature control system with magnetic linkage structure, combined with the internal circulation channel design, achieve uniform mixing of materials, precise distribution of catalyst, and accurate temperature regulation. The magnetic attraction of the magnet blocks drives the stirring mechanism and the moving mechanism to move without contact in the reactor. Combined with the control of the refrigerant flow by the solenoid valve, efficient mass and heat transfer is achieved.
It significantly improves the reaction efficiency and product yield of trimethyl orthoformate, ensures the homogeneity and stability of the reaction system, shortens the reaction time, and enhances product selectivity and purity.
Smart Images
Figure CN224358458U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of trimethyl orthoformate synthesis equipment, specifically a catalytic reactor for the synthesis of trimethyl orthoformate. Background Technology
[0002] Trimethyl orthoformate is an important organic chemical intermediate widely used in the synthesis processes of pharmaceuticals, pesticides, dyes, and fragrances. Currently, one of the mainstream industrial methods for producing trimethyl orthoformate involves reacting chloroform and sodium methoxide as raw materials in a reactor in the presence of a catalyst. This synthesis process requires stringent reaction conditions, typically necessitating an anhydrous environment and uniform catalyst dispersion to ensure high conversion rates and product yields.
[0003] In existing catalytic reactor technologies, the mixing of reactants typically relies on a single stirrer, which often results in uneven distribution of materials within the reactor. This is especially problematic when adding critical materials such as catalysts or chloroform, making it difficult to achieve instantaneous uniform dispersion and easily leading to excessively high local concentrations, thus triggering side reactions. Furthermore, catalysts are usually added in a one-time manner, making it impossible to dynamically adjust their distribution in the reaction zone according to the reaction progress. This results in insufficient utilization of catalyst activity and may even lead to agglomeration or deactivation due to local over-addition. Simultaneously, for applications requiring precise injection of liquid materials such as chloroform into the core reaction area, existing equipment lacks effective zoned flow guidance and dispersion structures, affecting the contact efficiency between materials. In addition, temperature control in the reactor largely relies on overall jacket heat exchange, which has a slow response speed when facing exothermic reactions or requiring rapid temperature adjustments, making it difficult to meet the high temperature stability requirements in the synthesis of trimethyl orthoformate. Utility Model Content
[0004] The purpose of this invention is to provide a catalytic reactor for the synthesis of trimethyl orthoformate, which has the advantages of good material mixing effect, adjustable catalyst distribution, precise injection of key materials, and stable temperature control, thus solving the problems in the prior art.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A catalytic reactor for the synthesis of trimethyl orthoformate includes a reactor body, an insulation cylinder fixed to the outer peripheral wall of the reactor body, a first fixed cylinder fixed to the center of the upper end of the reactor body, a motor fixed to the upper end of the first fixed cylinder, a stirring mechanism disposed at the lower end of the motor output shaft, a hollow cylinder fixed to the bottom surface of the inner wall of the reactor body, a plurality of first grooves penetrating the inner wall and outer peripheral wall of the hollow cylinder, a plurality of second grooves penetrating the lower end of the hollow cylinder, a moving mechanism slidably disposed on the inner wall of the cavity of the first groove, a third lifting ring disposed on the outer peripheral wall of the hollow cylinder, and a second magnet fixed inside the third lifting ring.
[0007] The second magnet and the moving mechanism are magnetically attracted to each other;
[0008] The upper end of the reactor body is fixedly connected with a first feed cylinder, a second feed cylinder, a third feed cylinder and a cylinder, and the lower end of the reactor body is provided with a draining mechanism.
[0009] The insulation cylinder is equipped with a cold liquid injection mechanism and a cold liquid discharge mechanism. A chloroform injection pipe is fixedly connected through the upper end of the reactor body. The lower end of the chloroform injection pipe passes through the upper end of the hollow cylinder and extends into the interior of the hollow cylinder. A liquid separation mechanism is provided on the upper part of the inner wall of the hollow cylinder.
[0010] The lower end of the cylinder's output shaft passes through the hollow cylinder and the liquid distribution mechanism and is fixed to the upper end of the moving mechanism.
[0011] Preferably, the draining mechanism includes a drain pipe that is fixedly connected to the lower end of the reactor body and a third solenoid valve disposed on the drain pipe.
[0012] It is worth noting that the drainage mechanism uses a third solenoid valve to control the opening and closing of the drainage pipe, thus achieving precise control over the discharge of materials after the reaction is completed.
[0013] Preferably, the stirring mechanism includes a stirring rod fixed to the lower end of the motor output shaft, a plurality of second fixed cylinders fixed to the outer peripheral wall of the stirring rod, and a plurality of stirring blocks fixed to the outer peripheral wall of the second fixed cylinders.
[0014] It is worth noting that multiple mixing blocks can improve the mixing effect.
[0015] Preferably, there is a gap between the end of the stirring block away from the stirring rod and the inner wall of the hollow cylinder.
[0016] It is worth noting that the gap avoids direct mechanical friction between the stirring block and the inner wall of the hollow cylinder, thereby reducing wear and energy consumption during equipment operation and extending the service life of the stirring mechanism and the hollow cylinder. Secondly, the presence of the gap allows the material to form a specific shear flow field during the stirring process, so that the material is squeezed and dispersed when passing through the gap, which enhances the mixing effect. In addition, this design can prevent solid catalysts or reaction intermediates from accumulating and clogging in narrow areas, ensuring that the reaction system is uniform and stable. For the synthesis process of trimethyl orthoformate, which is sensitive to reaction conditions, it helps to improve reaction efficiency and product selectivity.
[0017] Preferably, the cold liquid injection mechanism includes an inlet pipe that is fixedly connected to the upper end of the insulation cylinder and a first solenoid valve disposed on the inlet pipe, and the cold liquid discharge mechanism includes an outlet pipe that is fixedly connected to the outer peripheral wall of the insulation cylinder and a second solenoid valve disposed on the outlet pipe.
[0018] It is worth noting that by setting up an inlet pipe controlled by a first solenoid valve and an outlet pipe controlled by a second solenoid valve, the injection and discharge of refrigerant can be controlled in real time and automatically according to the temperature changes inside the reactor, thereby achieving precise control of the reaction temperature. In the synthesis of trimethyl orthoformate, the reaction temperature is crucial for equilibrium shift and the inhibition of side reactions. This mechanism can quickly remove the heat released by the reaction or provide cooling as needed, ensuring that the reaction is always within the optimal temperature window, thereby improving the yield of the target product.
[0019] Preferably, the liquid distribution mechanism includes a support ring fixed to the upper part of the inner wall of the hollow cylinder cavity and a plurality of diversion holes that penetrate through the lower end of the support ring, and the moving mechanism is located below the support ring.
[0020] It is worth noting that the support ring and the multiple diversion holes at its lower end in the liquid distribution mechanism constitute a key material pre-distribution unit. When chloroform or other liquid reactants enter the upper part of the hollow cylinder through the chloroform injection pipe, the support ring can temporarily hold the liquid and evenly distribute it to the moving mechanism and reaction area below through the multiple diversion holes at its lower end. This uniform distribution method avoids the problem of local excess or uneven distribution of raw materials, allowing the liquid material to contact the gas phase component or solid catalyst with a larger specific surface area, which significantly improves the mass transfer efficiency.
[0021] Preferably, the moving mechanism includes a first lifting ring slidably disposed on the inner wall of the hollow cylinder cavity and a plurality of first through holes opened through the lower end of the first lifting ring. A first magnet is disposed in the wall of the first lifting ring, and the first magnet and the second magnet attract each other magnetically. The lower end of the cylinder output shaft passes through the hollow cylinder and the bearing ring and is fixed to the upper end of the first lifting ring.
[0022] It is worth noting that the moving mechanism adopts a design with a first lifting ring and a first magnet. By forming a magnetic linkage with the second magnet inside the third lifting ring on the outer wall of the hollow cylinder, it achieves contactless driving of the reaction area. Its advantage is that when the cylinder drives the first lifting ring to move vertically inside the hollow cylinder, the magnetic force synchronously drives the movement of the external third lifting ring and its related components. There is no need to open dynamic sealing holes on the reactor wall, which completely eliminates the risk of leakage. At the same time, the multiple first through holes opened on the first lifting ring can guide the material to form axial flow during the lifting process, which enhances the circulation and mixing of reactants inside and outside the hollow cylinder. This structure not only ensures the airtightness of the reaction system, but also improves the mass and heat transfer efficiency, making it particularly suitable for synthesis reactions such as trimethyl orthoformate that require strict anhydrous and oxygen-free conditions.
[0023] Preferably, the moving mechanism includes a second lifting ring slidably disposed on the inner wall of the hollow cylinder cavity, a first vertical pipe through which the lower end of the second lifting ring is fixed, a magnetic ring disposed below the second lifting ring, a second vertical pipe through which the upper end of the magnetic ring is fixed, and a connecting bend fixed to the upper end of the second vertical pipe. The upper end of the connecting bend is fixed to the lower end of the first vertical pipe. Multiple second through holes are provided through the outer peripheral wall of the connecting bend. The magnetic ring and the second magnetic block are magnetically attracted to each other. The lower end of the cylinder's output shaft passes through the hollow cylinder and the bearing ring and is fixed to the upper end of the second lifting ring.
[0024] It is worth noting that this moving mechanism, through the combined design of the first riser, connecting bend, and second riser, constructs an internal material circulation channel connecting the upper and lower regions. When the cylinder drives the second lifting ring, the magnetic attraction between the magnetic ring and the second magnetic block drives the entire linkage structure to rise and fall within the hollow cylinder. At this time, the second through hole on the connecting bend not only plays a role in stirring and dispersing during the rising and falling process, but also forcibly guides the material to enter through the second through hole, and then conveys it upward or downward through the connecting bend and the first riser, forming a highly efficient directional internal circulation flow. This design greatly improves the mixing effect within the reaction system, eliminates concentration and temperature gradients, and ensures sufficient contact between the catalyst and reactants. For the synthesis reaction of trimethyl orthoformate, this enhanced mass and heat transfer internal circulation structure helps to shorten the reaction time, improve the reaction conversion rate, and increase product selectivity.
[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0026] 1. This utility model solves the problem of precise temperature control in traditional reactors by setting up a heat-insulating cylinder and its matching cold liquid injection and discharge mechanisms. In the synthesis of trimethyl orthoformate, the reaction temperature plays a decisive role in the equilibrium conversion rate and the inhibition of side reactions. When the reaction releases heat and causes the temperature to rise, the first solenoid valve opens, and the refrigerant enters the heat-insulating cylinder through the liquid inlet pipe. At the same time, the second solenoid valve opens, and the refrigerant after heat exchange is discharged from the liquid outlet pipe, forming a dynamic cold circulation system. This system can quickly remove excess heat and precisely maintain the reaction temperature within the optimal process window, thereby effectively inhibiting the occurrence of side reactions and significantly improving the yield and purity of trimethyl orthoformate.
[0027] 2. This utility model solves the problems of low mixing efficiency and leakage risk of traditional stirring devices in closed reaction systems by setting up a hollow cylinder, a moving mechanism, a third lifting ring, and a magnetic linkage structure. When the cylinder drives the first lifting ring to make vertical reciprocating motion inside the hollow cylinder, the mutual magnetic attraction between the first and second magnets synchronously drives the third lifting ring outside the hollow cylinder to move. At the same time, the stirring mechanism continues to rotate under the drive of the motor. This combination of internal and external, rotation and lifting disturbance makes the reactants form strong convection and shear inside and outside the hollow cylinder, which greatly enhances the mass and heat transfer efficiency of the gas, liquid and solid phases and ensures the uniformity and stability of the reaction system.
[0028] 3. This utility model solves the problems of uneven distribution of liquid raw materials and insufficient catalyst contact by setting up a liquid distribution mechanism and a moving mechanism including an internal circulation channel. After liquid materials such as chloroform enter the upper part of the hollow cylinder through the chloroform injection pipe, they are first received by the bearing ring, and then evenly distributed and dripped through multiple diversion holes at its lower end. When the cylinder drives the moving mechanism to move, the second through hole on the connecting bend pipe forces the material to enter and be transported by the first vertical pipe, forming an efficient directional internal circulation. This structure realizes the pre-distribution of liquid raw materials and forced internal circulation, ensuring that each reactant can fully contact the solid catalyst, thereby accelerating the reaction process, improving the raw material conversion rate, and further enhancing the selectivity of the target product. Attached Figure Description
[0029] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;
[0030] Figure 2 The diagram shown is a three-dimensional cross-sectional view of the present invention.
[0031] Figure 3 The diagram shown is a three-dimensional structural schematic of the first embodiment of the moving mechanism of this utility model;
[0032] Figure 4 The diagram shown is a three-dimensional structural schematic of a second embodiment of the moving mechanism of this utility model;
[0033] Figure 5 The diagram shown is a three-dimensional cross-sectional view of the hollow cylinder of this utility model.
[0034] Figure 6 The diagram shown is a three-dimensional structural schematic of the drainage mechanism of this utility model.
[0035] Reference numerals in the attached drawings: 1. Reactor body; 2. Insulation cylinder; 201. Liquid inlet pipe; 202. First solenoid valve; 203. Liquid outlet pipe; 204. Second solenoid valve; 3. First feed cylinder; 4. Second feed cylinder; 5. Third feed cylinder; 6. First fixed cylinder; 7. Motor; 701. Stirring rod; 702. Second fixed cylinder; 703. Stirring block; 8. Cylinder; 801. First lifting ring; 802. First through hole; 803. Second lifting ring; 804. First riser; 805. Magnet ring; 806. Second riser; 807. Connecting bend; 808. Second through hole; 9. Chloroform injection pipe; 10. Hollow cylinder; 11. First tank; 12. Second tank; 13. Bearing ring; 14. Diverter hole; 15. First magnet; 16. Third lifting ring; 17. Second magnet; 18. Drain pipe; 19. Third solenoid valve. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0037] To address the problems of uneven material mixing and dispersion, limited catalyst addition methods, difficulty in accurately injecting key materials into the reaction zone, and insufficient temperature control response in existing technologies, the following technical solutions are proposed. Please refer to [link / reference needed]. Figures 1-6 ;
[0038] A catalytic reactor for the synthesis of trimethyl orthoformate includes a reactor body 1, an insulation cylinder 2 fixed to the outer peripheral wall of the reactor body 1, a first fixed cylinder 6 fixed to the upper center of the reactor body 1, a motor 7 fixed to the upper end of the first fixed cylinder 6, a stirring mechanism disposed at the lower end of the output shaft of the motor 7, a hollow cylinder 10 fixed to the bottom surface of the inner wall of the reactor body 1, a plurality of first grooves 11 penetrating the inner wall and outer peripheral wall of the hollow cylinder 10, a plurality of second grooves 12 penetrating the lower end of the hollow cylinder 10, a moving mechanism slidably disposed on the inner wall of the cavity of the first groove 11, a third lifting ring 16 disposed on the outer peripheral wall of the hollow cylinder 10, and a second magnet block 17 fixed inside the third lifting ring 16.
[0039] The second magnet 17 and the moving mechanism are magnetically attracted to each other;
[0040] The upper end of the reactor body 1 is fixedly connected with a first feed cylinder 3, a second feed cylinder 4, a third feed cylinder 5 and a cylinder 8, and the lower end of the reactor body 1 is provided with a draining mechanism.
[0041] The heat preservation cylinder 2 is equipped with a cold liquid injection mechanism and a cold liquid discharge mechanism. The upper end of the reactor body 1 is fixedly connected with a chloroform injection pipe 9. The lower end of the chloroform injection pipe 9 passes through the upper end of the hollow cylinder 10 and extends into the interior of the hollow cylinder 10. The upper part of the inner wall of the hollow cylinder 10 is equipped with a liquid separation mechanism.
[0042] The lower end of the output shaft of cylinder 8 passes through the hollow cylinder 10 and the liquid distribution mechanism and is fixed to the upper end of the moving mechanism.
[0043] In this embodiment, specifically: the draining mechanism includes a drain pipe 18 that is fixedly connected to the lower end of the reactor body 1 and a third solenoid valve 19 disposed on the drain pipe 18.
[0044] In this embodiment, specifically: the stirring mechanism includes a stirring rod 701 fixed to the lower end of the output shaft of the motor 7, a plurality of second fixed cylinders 702 fixed to the outer peripheral wall of the stirring rod 701, and a plurality of stirring blocks 703 fixed to the outer peripheral wall of the second fixed cylinders 702.
[0045] In this embodiment, specifically: there is a gap between the end of the stirring block 703 away from the stirring rod 701 and the inner wall of the hollow cylinder 10.
[0046] In this embodiment, specifically: the cold liquid injection mechanism includes an inlet pipe 201 that is fixedly connected to the upper end of the insulation cylinder 2 and a first solenoid valve 202 disposed on the inlet pipe 201; the cold liquid discharge mechanism includes an outlet pipe 203 that is fixedly connected to the outer peripheral wall of the insulation cylinder 2 and a second solenoid valve 204 disposed on the outlet pipe 203.
[0047] In this embodiment, specifically: the liquid distribution mechanism includes a support ring 13 fixed to the upper part of the inner wall of the hollow cylinder 10 cavity and a plurality of diversion holes 14 that are opened through the lower end of the support ring 13, and the moving mechanism is located below the support ring 13.
[0048] Example 1: In this example, the moving mechanism specifically includes a first lifting ring 801 slidably disposed on the inner wall of the hollow cylinder 10 cavity and a plurality of first through holes 802 penetrating the lower end of the first lifting ring 801. A first magnet 15 is disposed in the wall of the first lifting ring 801. The first magnet 15 and the second magnet 17 are magnetically attracted to each other. The lower end of the output shaft of the cylinder 8 passes through the hollow cylinder 10 and the bearing ring 13 and is fixed to the upper end of the first lifting ring 801. This example achieves the desired effect through the magnetic attraction between the first magnet 15 and the second magnet 17. The cylinder 8 drives the first lifting ring 801 without contact, which in turn drives the third lifting ring 16 on the outer wall of the hollow cylinder 10 to move synchronously. This completely avoids the leakage risks caused by opening dynamic sealing holes on the reactor wall, ensuring the high efficiency of the reaction system. At the same time, during the lifting process, the multiple first through holes 802 at the lower end of the first lifting ring 801 can force the material to flow axially, forming a composite flow field with the radial flow generated by the stirring mechanism. This significantly enhances the circulation and mixing effect of the reactants inside and outside the hollow cylinder 10, and improves the mass and heat transfer efficiency.
[0049] Example 2: In this example, the moving mechanism specifically includes a second lifting ring 803 slidably disposed on the inner wall of the hollow cylinder 10 cavity, a first vertical pipe 804 fixedly connected to the lower end of the second lifting ring 803, a magnetic ring 805 disposed below the second lifting ring 803, a second vertical pipe 806 fixedly connected to the upper end of the magnetic ring 805, and a connecting bend 807 fixedly connected to the upper end of the second vertical pipe 806. The upper end of the connecting bend 807 is fixedly connected to the lower end of the first vertical pipe 804. A plurality of second through holes 808 are provided through the outer peripheral wall of the connecting bend 807. The magnetic ring 805 and the second magnetic block 17 are magnetically attracted to each other. The lower end of the output shaft of the cylinder 8 passes through the hollow cylinder 10 and the bearing ring 13 and is fixedly connected to the second vertical pipe 804. At the upper end of the lifting ring 803, when the cylinder 8 drives the second lifting ring 803 to move, the magnetic attraction between the magnetic ring 805 and the second magnetic block 17 drives the entire linkage structure to rise and fall. During this process, the second through hole 808 on the connecting bend 807 not only plays the role of dispersing materials, but also forces the reaction liquid into the channel. It is then directionally transported through the connecting bend 807 and the first vertical pipe 804 to form an efficient upward or downward flow. This forced internal circulation design completely eliminates the concentration gradient and temperature gradient in the reaction system, allowing the catalyst and reactants to come into full contact. It is particularly suitable for synthesis processes such as trimethyl orthoformate that require high reaction uniformity, and can effectively shorten the reaction time and improve product selectivity.
[0050] It should be noted that valve bodies are installed on the first feed cylinder 3, the second feed cylinder 4, and the third feed cylinder 5.
[0051] Working principle: When in use, sodium methoxide, catalyst and other reaction aids are first added into the reactor body 1 through the first feed cylinder 3, the second feed cylinder 4 and the third feed cylinder 5 respectively. In the initial state, the catalyst is distributed inside the reactor body 1 and inside and outside the hollow cylinder 10.
[0052] When the motor 7 is started, the output shaft of the motor 7 drives the stirring rod 701 to rotate. The stirring rod 701 drives the second fixed cylinder 702 and the stirring block 703 on its outer peripheral wall to rotate synchronously. The stirring block 703 stirs and mixes the material inside the hollow cylinder 10. Since there is a gap between the stirring block 703 and the inner wall of the hollow cylinder 10, it ensures smooth rotation while forming a forced vortex.
[0053] Chloroform is injected into the hollow cylinder 10 through the chloroform injection pipe 9. The chloroform is diverted through the support ring 13 on the upper part of the inner wall of the hollow cylinder 10 and evenly dispersed into the hollow cylinder 10 through multiple diversion holes 14 opened at the lower end of the support ring 13, so as to fully contact and react with the catalyst inside the hollow cylinder 10.
[0054] When cylinder 8 is activated, the output shaft of cylinder 8 pushes the moving mechanism to slide up and down on the inner wall of the hollow cylinder 10. Through different structural designs of the moving mechanism, precise control of catalyst distribution and material circulation can be achieved.
[0055] Regarding the moving mechanism of Embodiment 1: When the cylinder 8 drives the first lifting ring 801 to move up and down, the first magnet block 15 inside the first lifting ring 801 moves accordingly, and drives the third lifting ring 16 on the outer wall of the hollow cylinder 10 to slide synchronously through magnetic force. When the first lifting ring 801 rises, the third lifting ring 16 rises accordingly and gradually blocks the opening of the first tank 11, reducing the exchange of materials inside and outside the hollow cylinder 10, so that the catalyst is more concentrated in the lower part of the hollow cylinder 10. When the first lifting ring 801 falls, the third lifting ring 16 falls accordingly and gradually opens the opening of the first tank 11, increasing the exchange of materials inside and outside the hollow cylinder 10, promoting the uniform distribution of the catalyst in the reactor body 1. At the same time, the multiple first through holes 802 at the lower end of the first lifting ring 801 guide the axial flow of materials during the lifting process, enhancing the mixing effect.
[0056] Regarding the moving mechanism of Embodiment 2: Cylinder 8 drives the second lifting ring 803 to move up and down. The second lifting ring 803 drives the first vertical pipe 804, connecting bend 807, second vertical pipe 806 and magnetic ring 805 fixed to it to move up and down as a whole in the hollow cylinder 10. The magnetic ring 805 is magnetically attracted to the second magnetic block 17, thereby driving the third lifting ring 16 to move synchronously. During the lifting process, multiple second through holes 808 on the outer peripheral wall of the connecting bend 807 forcefully guide the reaction liquid into the channel, forming a directional internal circulation flow through the connecting bend 807 and the first vertical pipe 804: when the linkage structure rises, the material is sucked in from the second through holes 808 and conveyed upward along the first vertical pipe 804; when the linkage structure descends, the material is pushed out downward from the top of the channel through the first vertical pipe 804. This forced internal circulation completely eliminates the concentration gradient and temperature gradient, allowing the catalyst and reactants to fully contact.
[0057] Cold liquid is injected into the insulation cylinder 2 through the inlet pipe 201, and the injection volume is controlled by the first solenoid valve 202. The cold liquid is discharged through the outlet pipe 203, and the discharge volume is controlled by the second solenoid valve 204, thus achieving rapid adjustment of the internal temperature of the reactor body 1. A temperature sensor (not shown) can be installed on the inner wall of the reactor body 1, and a controller (not shown) is installed on the outer wall of the reactor body 1. The temperature sensor monitors the reaction temperature in real time and transmits the signal to the controller. The controller automatically controls the opening and closing of the first solenoid valve 202 and the second solenoid valve 204 according to the preset temperature range, achieving precise automatic temperature control. After the reaction is completed, the third solenoid valve 19 on the drain pipe 18 is opened to discharge the reaction products.
[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0059] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.
Claims
1. A catalytic reactor for the synthesis of trimethyl orthoformate, characterized in that: It includes a reactor body (1), an insulation cylinder (2) fixed to the outer peripheral wall of the reactor body (1), a first fixed cylinder (6) fixed to the center of the upper end of the reactor body (1), a motor (7) fixed to the upper end of the first fixed cylinder (6), a stirring mechanism set at the lower end of the output shaft of the motor (7), a hollow cylinder (10) fixed to the bottom surface of the inner wall of the reactor body (1), a plurality of first grooves (11) penetrating the inner wall and outer peripheral wall of the hollow cylinder (10), a plurality of second grooves (12) penetrating the lower end of the hollow cylinder (10), a moving mechanism slidably set on the inner wall of the cavity of the first groove (11), a third lifting ring (16) set on the outer peripheral wall of the hollow cylinder (10), and a second magnet block (17) fixed inside the third lifting ring (16). The second magnet (17) and the moving mechanism are magnetically attracted to each other; The upper end of the reactor body (1) is fixedly connected with a first feed cylinder (3), a second feed cylinder (4), a third feed cylinder (5) and a cylinder (8), and the lower end of the reactor body (1) is provided with a draining mechanism; The heat preservation cylinder (2) is equipped with a cold liquid injection mechanism and a cold liquid discharge mechanism. The upper end of the reactor body (1) is fixedly connected with a chloroform injection pipe (9). The lower end of the chloroform injection pipe (9) passes through the upper end of the hollow cylinder (10) and extends into the interior of the hollow cylinder (10). A liquid separation mechanism is provided on the upper part of the inner wall of the hollow cylinder (10). The lower end of the output shaft of the cylinder (8) passes through the hollow cylinder (10) and the liquid distribution mechanism and is fixed to the upper end of the moving mechanism.
2. The catalytic reactor for the synthesis of trimethyl orthoformate according to claim 1, characterized in that: The draining mechanism includes a drain pipe (18) that is fixed to the lower end of the reactor body (1) and a third solenoid valve (19) installed on the drain pipe (18).
3. The catalytic reactor for the synthesis of trimethyl orthoformate according to claim 1, characterized in that: The stirring mechanism includes a stirring rod (701) fixed to the lower end of the output shaft of the motor (7), a plurality of second fixed cylinders (702) fixed to the outer peripheral wall of the stirring rod (701), and a plurality of stirring blocks (703) fixed to the outer peripheral wall of the second fixed cylinders (702).
4. The catalytic reactor for the synthesis of trimethyl orthoformate according to claim 3, characterized in that: There is a gap between the end of the stirring block (703) away from the stirring rod (701) and the inner wall of the hollow cylinder (10).
5. The catalytic reactor for the synthesis of trimethyl orthoformate according to claim 1, characterized in that: The cold liquid injection mechanism includes an inlet pipe (201) that is fixed to the upper end of the insulation cylinder (2) and a first solenoid valve (202) provided on the inlet pipe (201). The cold liquid discharge mechanism includes an outlet pipe (203) that is fixed to the outer peripheral wall of the insulation cylinder (2) and a second solenoid valve (204) provided on the outlet pipe (203).
6. The catalytic reactor for the synthesis of trimethyl orthoformate according to claim 1, characterized in that: The liquid separation mechanism includes a support ring (13) fixed to the upper part of the inner wall of the hollow cylinder (10) and a plurality of diversion holes (14) through which the support ring (13) is opened. The moving mechanism is located below the support ring (13).
7. The catalytic reactor for the synthesis of trimethyl orthoformate according to claim 1, characterized in that: The moving mechanism includes a first lifting ring (801) that slides on the inner wall of the hollow cylinder (10) and a plurality of first through holes (802) that pass through the lower end of the first lifting ring (801). A first magnet (15) is provided in the inner wall of the first lifting ring (801). The first magnet (15) and the second magnet (17) are magnetically attracted to each other. The lower end of the output shaft of the cylinder (8) passes through the hollow cylinder (10) and the bearing ring (13) and is fixed to the upper end of the first lifting ring (801).
8. The catalytic reactor for the synthesis of trimethyl orthoformate according to claim 1, characterized in that: The moving mechanism includes a second lifting ring (803) slidably disposed on the inner wall of the hollow cylinder (10), a first vertical pipe (804) fixedly connected to the lower end of the second lifting ring (803), a magnet ring (805) disposed below the second lifting ring (803), a second vertical pipe (806) fixedly connected to the upper end of the magnet ring (805), and a connecting bend (807) fixedly connected to the upper end of the second vertical pipe (806). The upper end of the connecting bend (807) is fixedly connected to the lower end of the first vertical pipe (804). Multiple second through holes (808) are opened through the outer peripheral wall of the connecting bend (807). The magnet ring (805) and the second magnet block (17) are magnetically attracted to each other. The lower end of the output shaft of the cylinder (8) passes through the hollow cylinder (10) and the bearing ring (13) and is fixedly connected to the upper end of the second lifting ring (803).