A Highly Efficient Catalytic Synthesis Reactor for 3,3-Dimethicone

Abstract

This utility model relates to the field of chemical synthesis equipment technology, and discloses a high-efficiency catalytic synthesis reactor for 3,3-dimethylacrylic acid. It includes a bottom plate, an insulation cylinder and a reaction vessel fixed to the upper part of the bottom plate, a first stirring mechanism disposed within the reaction vessel, an exhaust mechanism disposed within the reaction vessel, a mixing tank and a water pump disposed on the upper part of the bottom plate, and a second stirring mechanism disposed on the mixing tank. The pump's suction end is connected to the mixing tank's outlet end via a pipe, and the pump's outlet end is connected to a first connecting pipe. The outlet end of the first connecting pipe is connected to the inlet end of an auxiliary agent addition pipe. This utility model has the advantages of uniform and efficient gas dispersion, precise and stable temperature control, controllable and adjustable catalyst addition, and online mixing and addition of auxiliary reagents.

Description

Technical Field

[0001] This utility model relates to the field of chemical synthesis equipment technology, specifically a high-efficiency catalytic synthesis reactor for 3,3-dimethylacrylic acid. Background Technology

[0002] 3,3-Dimethylacrylic acid is an important organic synthesis intermediate with wide applications in pharmaceuticals, pesticides, and fragrances. Its industrial synthesis mainly adopts the Prince reaction method, which involves the addition reaction of isobutylene gas with acrylic acid liquid under acid catalysis. This process is a typical gas-liquid heterogeneous exothermic reaction, and its reaction efficiency and safety are highly dependent on the efficiency of mass transfer, heat transfer, and mixing within the reactor.

[0003] Currently, batch reactors used for this type of gas-liquid reaction often suffer from the following problems: First, uneven gas distribution, with isobutylene bubbles easily coalescing and short-circuiting, resulting in insufficient contact with the liquid phase and limiting the reaction rate and feed conversion rate; second, concentrated exothermic reaction, which, if the heat cannot be removed in a timely and uniform manner, can cause local overheating, affecting product selectivity and potentially triggering side reactions or even safety accidents; in addition, the catalyst (mostly solid acid or highly corrosive liquid acid) is added in a crude manner, making it difficult to achieve uniform and controllable addition, thus affecting catalytic efficiency and reaction stability. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency catalytic synthesis reactor for 3,3-dimethylacrylic acid, which has the advantages of uniform and efficient gas dispersion, precise and stable temperature control, controllable and adjustable catalyst addition, and online mixing and addition of auxiliary reagents, thus solving the problems in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A high-efficiency catalytic synthesis reactor for 3,3-dimethylacrylic acid includes a bottom plate, an insulation cylinder and a reaction vessel fixed to the upper end of the bottom plate, a first stirring mechanism disposed in the reaction vessel, an exhaust mechanism disposed in the reaction vessel, a mixing tank and a water pump disposed on the upper end of the bottom plate, and a second stirring mechanism disposed on the mixing tank. The pump's suction end is connected to the mixing tank's outlet end via a pipe. The pump's outlet end is connected to a first connecting pipe, and the outlet end of the first connecting pipe is connected to the inlet end of the additive addition pipe. The base plate is provided with an air inlet pipe that is connected to an external isobutylene supply source. The air outlet end of the air inlet pipe and the air inlet end of the exhaust mechanism are connected to each other. The air inlet pipe and the first connecting pipe are connected to each other through a second connecting pipe. The second connecting pipe is provided with a fourth valve body and a fifth valve body. The upper end of the reactor is fixedly connected with an auxiliary agent addition pipe, a solution addition pipe and a catalyst addition pipe. The solution addition pipe is equipped with a third valve body and the catalyst addition pipe is equipped with a feeding mechanism. The inner wall of the insulation cylinder is fitted to the outer wall of the reactor. The reactor is equipped with a drainage mechanism that passes through the wall of the insulation cylinder and extends to the outside of the insulation cylinder.

[0006] Preferably, the first stirring mechanism includes a first motor fixed to the upper end of the reactor, a first rotating rod fixed to the lower end of the output shaft of the first motor, and a plurality of evenly distributed first stirring blocks fixed to the outer peripheral wall of the first rotating rod.

[0007] It is worth noting that the first stirring mechanism uses a motor-driven rotor to powerfully stir the stirring block, which can effectively break the laminar flow of the reaction liquid, promote the full mixing of acrylic acid liquid with the isobutylene gas and catalyst dispersed therein, and significantly increase the contact area and contact frequency of the gas-liquid-solid three phases. This greatly enhances the intrinsic reaction rate of the Prince addition reaction, shortens the reaction time, and provides a basic kinetic guarantee for high-efficiency synthesis.

[0008] Preferably, there is a gap between the outer wall of the first stirring block and the inner wall of the reactor.

[0009] It is worth noting that the key advantage of this design is that it avoids rigid contact and friction between the stirring block and the vessel wall, which protects the anti-corrosion layer on the inner wall of the reactor and extends the service life of the equipment. It also significantly reduces operating noise and vibration. The gap forms a continuous fluid shear zone, which can efficiently peel off reactants or polymers adhering to the vessel wall, prevent local scaling and hot spot formation, and ensure uniform and stable heat transfer, thereby maintaining the reaction within the optimal temperature range.

[0010] Preferably, the exhaust mechanism includes a hollow ring fixed to the middle of the inner wall of the reactor, multiple exhaust pipes fixed to the lower end of the hollow ring, multiple exhaust holes opened through the outer peripheral wall of the exhaust pipes, a fixed cylinder fixed to the outer peripheral wall of each exhaust pipe, and a hollow arc-shaped block fixed between two adjacent fixed cylinders. The hollow arc-shaped block has multiple exhaust grooves opened through one end near the center of the reactor, and a connecting groove is opened through the outer peripheral wall of the fixed cylinder, which is used to connect the interior of the hollow arc-shaped block and the interior of the exhaust pipe.

[0011] It is worth noting that the gas is distributed to each outlet pipe through the hollow ring and initially escapes from the outlet hole; at the same time, the gas enters the hollow arc block through the connecting groove and radiates horizontally from its outlet groove to the central area of ​​the reactor. This point-to-surface gas outlet method allows the gas to be released evenly in the depth and cross-section of the reaction liquid in the form of tiny bubbles, which solves the problems of uneven distribution, short circuit and bubble coalescence caused by traditional single-point gas distribution.

[0012] Preferably, a water injection pipe is fixedly connected to the outer peripheral wall of the insulation cylinder, and a first valve body is provided on the water injection pipe. The insulation cylinder has a hollow structure.

[0013] It is worth noting that by injecting cold water, hot water, or constant-temperature circulating water through the water injection pipe, the huge heat capacity of the water medium can be used to uniformly raise or lower the temperature of the reaction vessel or keep it at a constant temperature. Compared with direct electric heating or steam heating, the water bath temperature control gradient is gentle, which can effectively absorb and spread the heat released by the reaction, prevent local overheating or sudden temperature changes, and is particularly suitable for temperature-sensitive processes such as this synthesis reaction, ensuring that the reaction is carried out in a safe and stable thermal environment.

[0014] Preferably, the second stirring mechanism includes a second motor fixed to the upper end of the mixing tank, a second rotating rod fixed to the lower end of the output shaft of the second motor, and a plurality of second stirring blocks fixed to the outer peripheral wall of the second rotating rod.

[0015] It is worth noting that the independent mixing tank and the second stirring mechanism enable offline premixing and online precise addition of additives (such as polymerization inhibitors and solvents). Solid or high-viscosity additives can be pre-prepared into a homogeneous solution in the mixing tank, avoiding the problems of uneven dispersion and excessively high local concentration caused by direct addition to the reactor. Through the water pump and connecting pipe, the prepared additive solution can be delivered to the reaction system as needed and in a quantitative manner, making the operation flexible and precise.

[0016] Preferably, the feeding mechanism includes a movable tank threaded onto the upper end of the catalyst adding pipe, a third motor fixed to the upper end of the movable tank, a third rotating rod fixed to the lower end of the output shaft of the third motor, a fixed ring fixed to the lower part of the outer peripheral wall of the third rotating rod, and multiple scrapers fixed to the outer peripheral wall of the fixed ring. The lower end of the catalyst adding pipe is provided with multiple discharge slots. When the third rotating rod rotates, the scrapers can completely cover the discharge slots.

[0017] It is worth noting that the movable tank is detachable, making it easy to fill with catalyst. By controlling the start, stop and speed of the third motor, the scraper is driven to rotate, thereby precisely adjusting the opening area and time of the discharge trough and controlling the catalyst flow rate. This mechanical adjustment method is more precise and safer than manual addition, and is especially suitable for reactions that are sensitive to the catalyst addition rate. It avoids the violent initial reaction caused by a one-time addition of catalyst, making the catalytic process more stable, which is conducive to maintaining the stability of the reaction system and reducing side reactions caused by local excess of catalyst.

[0018] Preferably, the draining mechanism includes a water outlet pipe and a second valve body. The water outlet pipe is fixedly connected to the outer peripheral wall of the reactor. The outlet end of the water outlet pipe passes through the wall of the insulation cylinder and extends to the outside of the insulation cylinder. The water outlet pipe is equipped with a second valve body.

[0019] It is worth noting that the outlet pipe is directly integrated into the lower part of the reactor, ensuring that the reaction liquid can be completely drained by gravity without any dead corners. The pipe extends to the outside through the insulation cylinder, realizing the physical isolation between the liquid discharge process and the insulation system, which is convenient to operate. The second valve body (usually a corrosion-resistant precision shut-off valve or ball valve) provides reliable on / off control, can accurately manage the discharge process, and can be easily maintained or replaced.

[0020] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By setting up an exhaust mechanism (including a hollow ring, an exhaust pipe, and a hollow arc block) connected to the inlet pipe, and making it form a three-dimensional distribution network inside the reactor, this utility model fundamentally optimizes the gas-liquid mass transfer process. Isobutylene gas is broken into microbubbles through this network and is released uniformly and diffusely in the depth of the reaction liquid. This design significantly increases the effective gas-liquid contact area, avoids gas short-circuiting and aggregation, and enables isobutylene to fully and quickly react with acrylic acid liquid, thereby greatly improving the reaction rate and raw material conversion rate, and effectively solving the problem of low efficiency caused by uneven gas distribution in the background technology. 2. By adopting a hollow insulation cylinder structure with the inner wall attached to the reactor, and in conjunction with a water injection pipe and valve body, this utility model achieves precise, gentle and uniform control of the reaction temperature. This structure forms a circulating and adjustable water bath jacket. Utilizing the high heat capacity of water, it can efficiently and stably absorb or provide reaction heat, ensuring that the entire reaction system is in a uniform and stable thermal environment. This effectively eliminates the formation of local hot spots, not only ensuring the safety of the reaction process, but also suppressing side reactions caused by temperature fluctuations, thereby improving the selectivity and overall yield of the target product 3,3-dimethylacrylic acid. 3. By setting up a feeding mechanism consisting of a movable tank, an adjustable speed motor, and a scraper, this utility model achieves precise and controllable addition of solid or high-viscosity catalysts. During operation, by controlling the speed and start / stop of the motor, the scraper is driven to rotate to adjust the opening of the discharge trough, thereby enabling continuous or intermittent, on-demand control of the catalyst addition rate. This method replaces the crude, one-time manual addition, allowing the catalyst to enter the reaction system smoothly and evenly, avoiding the risk of violent reaction and runaway caused by excessively high initial concentration. It significantly improves the stability of the catalytic process and the controllability of the reaction, solving the problem of crude catalyst addition methods in the background technology. Attached Figure Description

[0021] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model; Figure 2 The diagram shown is a three-dimensional cross-sectional view of the heat-insulating cylinder of this utility model. Figure 3The diagram shown is a three-dimensional cross-sectional view of the exhaust mechanism of this utility model. Figure 4 The diagram shown is a three-dimensional cross-sectional view of the second stirring mechanism of this utility model. Figure 5 The diagram shown is a three-dimensional structural schematic of the second connecting pipe of this utility model. Figure 6 The diagram shown is a three-dimensional cross-sectional view of the feeding mechanism of this utility model.

[0022] Reference numerals: 1. Base plate; 2. Insulation cylinder; 201. Water injection pipe; 202. First valve body; 203. Water outlet pipe; 204. Second valve body; 3. Reactor; 4. Additive addition pipe; 5. Solution addition pipe; 6. Third valve body; 7. First motor; 8. Catalyst addition pipe; 9. Movable tank; 10. Air inlet pipe; 11. Mixing tank; 12. Water pump; 13. First rotating rod; 14. First stirring block; 15. Hollow ring; 16. Air outlet pipe; 17. Air outlet hole; 18. Fixed cylinder; 19. Hollow arc-shaped block; 20. Air outlet groove; 21. Second motor; 22. Second rotating rod; 23. Second stirring block; 24. First connecting pipe; 25. Second connecting pipe; 26. Fourth valve body; 27. Fifth valve body; 28. Third motor; 29. ​​Third rotating rod; 30. Fixed ring; 31. Scraper; 32. Discharge trough. Detailed Implementation

[0023] 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.

[0024] To address the problems of uneven gas distribution, difficulty in heat removal, and inconvenience in catalyst addition in existing technologies, the following technical solution is proposed. Please refer to [link / reference]. Figures 1-6 ; A high-efficiency catalytic synthesis reactor for 3,3-dimethylacrylic acid includes a bottom plate 1, an insulation cylinder 2 fixed to the upper end of the bottom plate 1 and a reaction vessel 3, a first stirring mechanism disposed in the reaction vessel 3, an exhaust mechanism disposed in the reaction vessel 3, a mixing tank 11 disposed on the upper end of the bottom plate 1, a water pump 12 and a second stirring mechanism disposed on the mixing tank 11. The pump 12 is connected to the outlet of the mixing tank 11 via a pipe. The outlet of the pump 12 is connected to a first connecting pipe 24, and the outlet of the first connecting pipe 24 is connected to the inlet of the additive adding pipe 4. An air inlet pipe 10 connected to an external isobutylene supply source is provided on the base plate 1. The air outlet end of the air inlet pipe 10 and the air inlet end of the exhaust mechanism are connected to each other. The air inlet pipe 10 and the first connecting pipe 24 are connected to each other through a second connecting pipe 25. A fourth valve body 26 and a fifth valve body 27 are provided on the second connecting pipe 25. The upper end of the reactor 3 is fixedly connected with an auxiliary agent addition pipe 4, a solution addition pipe 5 and a catalyst addition pipe 8. The solution addition pipe 5 is equipped with a third valve body 6 and the catalyst addition pipe 8 is equipped with a feeding mechanism. The inner wall of the insulation cylinder 2 is attached to the outer peripheral wall of the reactor 3. The reactor 3 is equipped with a draining mechanism that passes through the wall of the insulation cylinder 2 and extends to the outside of the insulation cylinder 2.

[0025] First, liquid reaction raw materials are added to the reaction vessel 3 through the solution addition tube 5, and the catalyst is added to the reaction vessel 3 through the feeding mechanism set on the catalyst addition tube 8. At the same time, auxiliary reagents can be added to the mixing tank 11, and the second stirring mechanism is started for premixing. 3. Subsequently, the first stirring mechanism is started to stir and mix the materials in the reactor 3, and heat exchange medium is introduced into the heat exchange cylinder 2 to regulate the temperature of the reactor 3. When the reaction needs to be started, isobutylene gas from the external gas source is introduced into the exhaust mechanism through the gas inlet pipe 10. The exhaust mechanism evenly disperses the gas into the liquid in the reactor 3, so that it can fully contact the liquid raw materials and carry out the catalytic reaction. During the reaction, heat is exchanged through the heat exchange medium in the heat insulation cylinder 2 to maintain the stable temperature of the reaction system. During the reaction or at a specific stage, the water pump 12 can be started to add the premixed auxiliary reagent solution in the mixing tank 11 to the reaction vessel 3 through the first connecting pipe 24 and the auxiliary agent addition pipe 4 in a quantitative manner. In addition, by operating the fourth valve body 26 and the fifth valve body 27 on the second connecting pipe 25, the gas circuit and the additive addition circuit can be connected and controlled. After the reaction is completed, the gas source and the stirring mechanism are turned off, and the final product in the reaction vessel 3 is discharged by operating the draining mechanism, thereby completing a batch synthesis process.

[0026] In this embodiment, specifically: the first stirring mechanism includes a first motor 7 fixed to the upper end of the reactor 3, a first rotating rod 13 fixed to the lower end of the output shaft of the first motor 7, and a plurality of evenly distributed first stirring blocks 14 fixed to the outer peripheral wall of the first rotating rod 13.

[0027] In this embodiment, specifically: there is a gap between the outer wall of the first stirring block 14 and the inner wall of the reaction vessel 3.

[0028] In this embodiment, specifically: the exhaust mechanism includes a hollow ring 15 fixed to the middle of the inner wall of the reactor 3, a plurality of exhaust pipes 16 fixed to the lower end of the hollow ring 15, a plurality of exhaust holes 17 opened through the outer peripheral wall of the exhaust pipes 16, a fixed cylinder 18 fixed to the outer peripheral wall of each exhaust pipe 16, and a hollow arc-shaped block 19 fixed between two adjacent fixed cylinders 18. The hollow arc-shaped block 19 has a plurality of exhaust grooves 20 opened through one end near the center of the reactor 3. The outer peripheral wall of the fixed cylinder 18 has a connecting groove, which is used to connect the interior of the hollow arc-shaped block 19 and the interior of the exhaust pipe 16.

[0029] In this embodiment, specifically: a water injection pipe 201 is fixedly connected to the outer peripheral wall of the heat insulation cylinder 2, and a first valve body 202 is provided on the water injection pipe 201. The heat insulation cylinder 2 has a hollow structure.

[0030] In this embodiment, specifically: the second stirring mechanism includes a second motor 21 fixed to the upper end of the mixing tank 11, a second rotating rod 22 fixed to the lower end of the output shaft of the second motor 21, and a plurality of second stirring blocks 23 fixed to the outer peripheral wall of the second rotating rod 22.

[0031] In this embodiment, specifically: the feeding mechanism includes a movable tank 9 threaded onto the upper end of the catalyst adding pipe 8, a third motor 28 fixed to the upper end of the movable tank 9, a third rotating rod 29 fixed to the lower end of the output shaft of the third motor 28, a fixing ring 30 fixed to the lower part of the outer peripheral wall of the third rotating rod 29, and multiple scrapers 31 fixed to the outer peripheral wall of the fixing ring 30. The lower end of the catalyst adding pipe 8 is provided with multiple discharge troughs 32. When the third rotating rod 29 rotates, the scrapers 31 can completely cover the discharge troughs 32.

[0032] It should be noted that by controlling the third motor 28 to drive the third rotating rod 29 and the scraper 31 to rotate, the relative position of the scraper 31 and the discharge trough 32 can be adjusted, thereby achieving stepless or stepped adjustment from complete coverage to complete opening, so as to control the catalyst flow acceleration rate.

[0033] In this embodiment, specifically: the draining mechanism includes a water outlet pipe 203 and a second valve body 204. The water outlet pipe 203 is fixedly connected to the outer peripheral wall of the reactor 3. The liquid outlet end of the water outlet pipe 203 passes through the wall of the insulation cylinder 2 and extends to the outside of the insulation cylinder 2. The water outlet pipe 203 is provided with a second valve body 204.

[0034] Working principle: First, a metered amount of acrylic acid liquid is added into the reactor 3 through the solution addition pipe 5, and a solid or high-viscosity catalyst is added through the feeding mechanism set on the catalyst addition pipe 8. Specifically, after the catalyst is loaded into the movable tank 9, the third motor 28 is started to drive the third rotating rod 29 and the scraper 31 fixed on it to rotate. The flow rate of the catalyst is precisely adjusted by controlling the position of the scraper 31 relative to the discharge trough 32, so that it is smoothly added into the reactor 3. Meanwhile, the required additives, such as polymerization inhibitors, can be added to the mixing tank 11. The second motor 21 is started to drive the second stirring block 23 to premix and obtain a uniform additive solution for later use. Subsequently, the first motor 7 is started to drive the first rotating rod 13 and the first stirring block 14 to stir the material in the reactor. Circulating water bath medium is injected into the hollow insulation cylinder 2 through the water injection pipe 201 to preheat the reactor 3 so that it reaches the set initial reaction temperature. When the reaction starts, the inlet pipe 10, which is connected to the external isobutylene supply source, delivers the isobutylene gas to the exhaust mechanism set in the reactor 3. The gas first enters the hollow ring 15 fixed in the middle of the reactor wall, and then is distributed to the outlet pipes 16 that pass through its lower end. A portion of the gas escapes directly from the multiple outlet holes 17 on the wall of the outlet pipe 16 in the form of tiny bubbles. Another part of the gas enters the hollow arc-shaped block 19 between adjacent fixed cylinders 18 through the connecting groove on the side wall of the fixed cylinder 18, and finally escapes horizontally from the gas outlet 20 near the center of the reactor 3. This three-dimensional multi-level distribution method enables the isobutylene gas to be finely dispersed in both the depth and cross-section of the reaction liquid. Under the strong shearing and circulation action of the first stirring block 14, the dispersed bubbles and the acrylic acid liquid containing the catalyst are fully mixed and contacted to carry out a highly efficient catalytic addition reaction. The heat released during the reaction is absorbed in a timely and uniform manner by the circulating water bath medium in the heat preservation cylinder 2. The precise and stable temperature control of the reaction system can be achieved by adjusting the water bath temperature. In addition, the premixed additive solution in the mixing tank 11 can be quantitatively added to the reaction system through the first connecting pipe 24 and the additive addition pipe 4 by starting the water pump 12. Process control can also be achieved by opening the fourth valve body 26 and the fifth valve body 27 on the second connecting pipe 25 under specific circumstances. After the reaction is complete, the gas inlet and stirring are turned off, and the reaction product is discharged and collected through the drainage mechanism set on the reactor 3, that is, by opening the second valve body 204 on the water outlet pipe 203, thus completing the synthesis process of one batch.

[0035] 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.

[0036] 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 highly efficient catalytic synthesis reactor for 3,3-dimethicone, characterized in that: It includes a base plate (1), a heat insulation cylinder (2) fixed to the upper end of the base plate (1) and a reactor (3), a first stirring mechanism set in the reactor (3), an exhaust mechanism set in the reactor (3), a mixing tank (11) and a water pump (12) set in the upper end of the base plate (1) and a second stirring mechanism set in the mixing tank (11); The pump (12) is connected to the outlet of the mixing tank (11) via a pipe. The outlet of the pump (12) is connected to the first connecting pipe (24), and the outlet of the first connecting pipe (24) is connected to the inlet of the additive adding pipe (4). An air inlet pipe (10) connected to an external isobutylene supply source is provided on the base plate (1). The air outlet of the air inlet pipe (10) and the air inlet of the exhaust mechanism are connected to each other. The air inlet pipe (10) and the first connecting pipe (24) are connected to each other through a second connecting pipe (25). A fourth valve body (26) and a fifth valve body (27) are provided on the second connecting pipe (25). The upper end of the reactor (3) is fixedly connected with an auxiliary agent addition pipe (4), a solution addition pipe (5) and a catalyst addition pipe (8). The solution addition pipe (5) is equipped with a third valve body (6), and the catalyst addition pipe (8) is equipped with a feeding mechanism. The inner wall of the heat preservation cylinder (2) is attached to the outer peripheral wall of the reactor (3). The reactor (3) is provided with a draining mechanism that passes through the wall of the heat preservation cylinder (2) and extends to the outside of the heat preservation cylinder (2).

2. The high-efficiency catalytic synthesis reactor for 3,3-dimethicone according to claim 1, characterized in that: The first stirring mechanism includes a first motor (7) fixed to the upper end of the reactor (3), a first rotating rod (13) fixed to the lower end of the output shaft of the first motor (7), and a plurality of evenly distributed first stirring blocks (14) fixed to the outer peripheral wall of the first rotating rod (13).

3. The high-efficiency catalytic synthesis reactor for 3,3-dimethicone according to claim 2, characterized in that: There is a gap between the outer wall of the first stirring block (14) and the inner wall of the reactor (3).

4. The high-efficiency catalytic synthesis reactor for 3,3-dimethicone according to claim 1, characterized in that: The exhaust mechanism includes a hollow ring (15) fixed to the middle of the inner wall of the reactor (3), multiple exhaust pipes (16) fixed to the lower end of the hollow ring (15), multiple exhaust holes (17) opened through the outer peripheral wall of the exhaust pipes (16), a fixed cylinder (18) fixed to the outer peripheral wall of each exhaust pipe (16), and a hollow arc-shaped block (19) fixed between two adjacent fixed cylinders (18). Multiple exhaust grooves (20) are opened through the end of the hollow arc-shaped block (19) near the center of the reactor (3). A connecting groove is opened through the outer peripheral wall of the fixed cylinder (18), and the connecting groove is used to connect the interior of the hollow arc-shaped block (19) and the interior of the exhaust pipe (16).

5. The high-efficiency catalytic synthesis reactor for 3,3-dimethicone according to claim 1, characterized in that: A water injection pipe (201) is fixedly connected to the outer peripheral wall of the heat insulation cylinder (2). A first valve body (202) is provided on the water injection pipe (201). The heat insulation cylinder (2) has a hollow structure.

6. The high-efficiency catalytic synthesis reactor for 3,3-dimethicone according to claim 1, characterized in that: The second stirring mechanism includes a second motor (21) fixed to the upper end of the mixing tank (11), a second rotating rod (22) fixed to the lower end of the output shaft of the second motor (21), and a plurality of second stirring blocks (23) fixed to the outer peripheral wall of the second rotating rod (22).

7. The high-efficiency catalytic synthesis reactor for 3,3-dimethicone according to claim 1, characterized in that: The feeding mechanism includes a movable tank (9) threaded onto the upper end of the catalyst adding pipe (8), a third motor (28) fixed to the upper end of the movable tank (9), a third rotating rod (29) fixed to the lower end of the output shaft of the third motor (28), a fixed ring (30) fixed to the lower part of the outer peripheral wall of the third rotating rod (29), and multiple scrapers (31) fixed to the outer peripheral wall of the fixed ring (30). Multiple discharge troughs (32) are opened through the lower end of the catalyst adding pipe (8). When the third rotating rod (29) rotates, the scrapers (31) can completely cover the discharge troughs (32).

8. The high-efficiency catalytic synthesis reactor for 3,3-dimethicone according to claim 1, characterized in that: The draining mechanism includes a water outlet pipe (203) and a second valve body (204). The water outlet pipe (203) is fixedly connected to the outer peripheral wall of the reactor (3). The outlet end of the water outlet pipe (203) passes through the wall of the insulation cylinder (2) and extends to the outside of the insulation cylinder (2). The water outlet pipe (203) is provided with a second valve body (204).

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