Novel reactor for high-pressure reaction of ethyl formate
By introducing a metering component and a lifting component into the ethyl formate high-pressure reactor, the feed rate can be precisely controlled and uniform heating and stirring can be achieved, solving the problems of raw material imbalance and uneven heating in traditional reactors, thus improving reaction efficiency and product purity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINXIANG RUINUO PHARM CO LTD
- Filing Date
- 2025-04-10
- Publication Date
- 2026-04-17
AI Technical Summary
Traditional ethyl formate high-pressure reactors suffer from reduced reaction conversion rates and increased side reactions due to imbalanced raw material ratios. Furthermore, uneven heating and stirring can lead to localized overheating or pressure runaway, increasing purification difficulty and raw material waste.
It employs a metering and lifting assembly, and uses an electric push rod to drive a baffle to precisely control the feed rate. Combined with a motor-driven stirring rod and heating wire, it achieves uniform heating and stirring, ensuring uniform mixing of reactants and temperature control. A condensation pipe is used to handle the steam.
It achieves efficient control of feed rate, avoids the decrease in reaction conversion rate and side reactions caused by raw material imbalance, improves product purity, and reduces raw material waste and purification difficulty.
Smart Images
Figure CN224127214U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high-pressure reaction of ethyl formate, and in particular to a novel reactor for high-pressure reaction of ethyl formate. Background Technology
[0002] Ethyl formate is a colorless, transparent liquid with a fruity aroma, widely used as a food additive, flavoring agent, and intermediate in organic synthesis. Its industrial preparation typically involves the esterification of formic acid with ethanol, a reversible process limited by thermodynamic equilibrium. The application of high-pressure reactors is primarily based on two reasons: firstly, pressurization effectively increases the reaction temperature, significantly accelerating the reaction rate; secondly, the high-pressure environment, through Le Chatelier's principle, inhibits the vaporization of water generated during the reaction, shifting the reaction towards esterification and thus improving conversion and yield. This equipment choice optimizes both reaction efficiency and economics in industrial production.
[0003] In traditional high-pressure reactors for ethyl formate, formic acid and ethanol are first added to a pressure-resistant reactor along with an acidic catalyst at a specific molar ratio. After sealing, the reactor is heated to 80–120°C and pressurized to 0.3–0.8 MPa to suppress the vaporization of generated water and promote forward esterification. Mass transfer is enhanced by stirring during the reaction, and the reactor is kept at constant temperature and pressure for 2–6 hours until dynamic equilibrium is reached. After the reaction, the reactor is cooled to room temperature, the pressure is slowly released, and the product is separated and purified by neutralization, liquid-liquid separation, and distillation. Strict pressure monitoring and explosion-proof measures are required during operation, and the equipment must be kept airtight to prevent leakage risks.
[0004] In traditional high-pressure reactors for ethyl formate, imbalances in the raw material ratio can lead to a decrease in reaction conversion rate, an increase in side reactions causing local overheating or pressure runaway, which increases the difficulty of purification and results in raw material waste. In addition, uneven heating and stirring within the reactor, and excessively high or low local temperatures, can trigger side reactions that reduce esterification efficiency and lead to a decrease in product purity. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a novel high-pressure reactor for ethyl formate, which aims to improve the problems of traditional high-pressure reactors for ethyl formate where the reaction conversion rate decreases due to imbalance in the raw material ratio, the increase in side reactions leading to local overheating or pressure runaway, and the resulting increase in purification difficulty and waste of raw materials.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a novel high-pressure reactor for ethyl formate, comprising a storage tank, a water pump installed on the top of the storage tank, a delivery pipe fixedly connected to the input end of the water pump, an outer shell fixedly connected to one end of the delivery pipe, and a metering component installed inside the outer shell;
[0007] The quantitative component includes a base, a first baffle, and a second baffle. The base is located inside the outer casing. The first baffle is located on one side of the base, and the second baffle is located on one side of the first baffle. An electric push rod and a gear are located on the top of the base. The output end of the electric push rod is fixedly connected to the first baffle. A first fixing post is fixedly connected to the outer wall of the first baffle. A slot is formed inside the first baffle. A first rack is fixedly connected to the outer wall of the first fixing post. A second rack is located on one side of the outer wall of the first rack. A fixing block is fixedly connected to the outer wall of the second rack. A second fixing post is fixedly connected to the outer wall of the fixing block. One end of the second fixing post is fixedly connected to the outer wall of the second baffle. A locking block is fixedly connected to the outer wall of the second baffle.
[0008] Furthermore, a top cover is fixedly connected to the outer wall of the outer shell, a reaction vessel is provided at the bottom of the top cover, a lifting assembly is provided on one side of the outer wall of the reaction vessel, a second motor is provided at the top of the top cover, a stirring rod is fixedly connected to the output end of the second motor, a spiral blade is fixedly connected to the outer wall of the stirring rod, a paddle is fixedly connected to the bottom end of the stirring rod, and an electric heating wire is provided inside the reaction vessel.
[0009] Furthermore, the lifting assembly includes a guide rail, which is disposed on one side of the outer wall of the reactor. A motor is fixedly connected to the top of the guide rail, a lead screw is fixedly connected to the output end of the motor, a slider is threadedly connected to the outer wall of the lead screw, a connecting column is fixedly connected to the outer wall of the slider, and a base is fixedly connected to the bottom of the guide rail.
[0010] Furthermore, the outer walls of the gear are respectively meshed with rack one and rack two, which are used to drive fixed column one and fixed column two to move.
[0011] Furthermore, the base has a sliding groove inside, and the outer wall of the fixing block slides inside the sliding groove.
[0012] Furthermore, the stirring rod is located inside the reaction vessel to accelerate the reaction of the reaction liquid.
[0013] Furthermore, one end of the connecting column is fixedly connected to the outer wall of the top cover, which is used to drive the top cover to move up and down.
[0014] Furthermore, a condensation pipe is fixedly connected to the outer wall of the top cover for transporting steam.
[0015] This utility model has the following beneficial effects:
[0016] 1. In this utility model, the baffle is driven to move laterally by an electric push rod, and the rack is driven to mesh with the gear by a fixed column, and the rack moves in the opposite direction in a synchronous linkage, so that the fixed column drives the baffle to make complementary displacement. The cooperation of the locking block and the locking groove realizes the precise control of the feed amount by the double baffles. This solves the problem that the reaction conversion rate will decrease due to the imbalance of raw material ratio when feeding material in traditional reactors, and the increase of side reactions will cause local overheating or pressure runaway. It achieves the effect of efficient purification and avoids waste of raw materials.
[0017] 2. In this utility model, the stirring rod driven by the second motor drives the spiral blades and the paddle blades to work together to mix and stir. The reaction vessel is heated by the electric heating wire in the inner jacket of the reaction vessel. This solves the problem of uneven heating and stirring in traditional reactors, and the problem of local temperature being too high or too low, which can cause side reactions and reduce esterification efficiency. This achieves the effect of improving product purity. Attached Figure Description
[0018] Figure 1 This is a three-dimensional structural schematic diagram of a novel high-pressure reactor for ethyl formate proposed in this utility model;
[0019] Figure 2 This is a schematic diagram of the internal structure of the outer shell of a novel high-pressure reactor for ethyl formate proposed in this utility model.
[0020] Figure 3 This is a schematic diagram of the internal structure of a novel high-pressure reactor for ethyl formate proposed in this utility model.
[0021] Legend:
[0022] 1. Storage tank; 2. Water pump; 3. Delivery pipe; 4. Base; 5. Reactor; 6. Motor 1; 7. Connecting column; 8. Lead screw; 9. Sliding block; 10. Motor 2; 11. Outer shell; 12. Condensation pipe; 13. Top cover; 14. Electric push rod; 15. Baffle 1; 16. Gear; 17. Rack 1; 18. Rack 2; 19. Fixed column 1; 20. Fixed column 2; 21. Slot; 22. Block; 23. Baffle 2; 24. Fixed block; 25. Slide groove; 26. Base; 27. Heating wire; 28. Spiral blade; 29. Paddle blade; 30. Stirring rod; 31. Guide rail. 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] Reference Figure 1 - Figure 3 An embodiment of this utility model is provided: a novel high-pressure reactor for ethyl formate, including a storage tank 1, a water pump 2 is provided on the top of the storage tank 1, the water pump 2 is used to pump the liquid raw material in the storage tank into the reaction area through the conveying pipe 3 to provide conveying power, the input end of the water pump 2 is fixedly connected to the conveying pipe 3, one end of the conveying pipe 3 is fixedly connected to the outer shell 11, and a metering component is provided inside the outer shell 11.
[0025] The metering component includes a base 26, a first baffle 15, and a second baffle 23. The first baffle 15 and the second baffle 23 adjust the cross-sectional area of the material channel by relative movement, controlling the flow rate. The base 26 is located inside the outer casing 11. The first baffle 15 is located on one side of the base 26, and the second baffle 23 is located on one side of the first baffle 15. An electric push rod 14 is located on the top of the base 26, providing power for the linear movement of the first baffle 15. A gear 16 is located on the top of the base 26. The output end of the electric push rod 14 is fixedly connected to the first baffle 15. A fixing post 19 is fixedly connected to the outer wall of the first baffle 15. A slot 21 is provided inside the first baffle 15. A rack 17 is fixedly connected to the outer wall of the fixing post 19. A rack 28 is located on one side of the outer wall of the rack 17. A fixing block 24 is fixedly connected to the outer wall of strip 28. A fixing column 20 is fixedly connected to the outer wall of fixing block 24. One end of fixing column 20 is fixedly connected to the outer wall of baffle 23. A locking block 22 is fixedly connected to the outer wall of baffle 23. The locking groove 21 and locking block 22 are used to interlock and form a seal when the baffle is closed. A top cover 13 is fixedly connected to the outer wall of outer shell 11. A reaction vessel 5 is set at the bottom of top cover 13. A lifting component is set on one side of the outer wall of reaction vessel 5. A motor 20 is set at the top of top cover 13. A stirring rod 30 is fixedly connected to the output end of motor 20. A spiral blade 28 is fixedly connected to the outer wall of stirring rod 30. A paddle blade 29 is fixedly connected to the bottom end of stirring rod 30. An electric heating wire 27 is set inside reaction vessel 5. The electric heating wire 27 provides heating function and controls reaction temperature.
[0026] Specifically, when the raw material is transported from storage tank 1 to the metering component via water pump 2, the electric push rod 14 initiates closed-loop control based on preset flow parameters. Its built-in displacement sensor provides real-time feedback on the push rod stroke, driving baffle 15 to move laterally along precision guide rail 31, which in turn drives fixed column 19 to advance synchronously. At this time, the meshing transmission between rack 17 and gear 16 converts linear motion into gear 16 rotation, and the torque is transmitted to fixed block 24 through symmetrically designed reverse rack 28. Fixed block 24 is constrained by the linear guidance of slide groove 25, pushing baffle 23 to move in the opposite direction along a mirror trajectory, forming a symmetrical opening and closing action of the two baffles. The key interlocking structure consists of the trapezoidal slot 21 of baffle 15 and the wedge-shaped block 22 of baffle 23. During the movement, dynamic self-locking is achieved through inclined surface contact, which not only eliminates flow fluctuations caused by transmission gaps, but also prevents overshoot through mechanical hard limiting.
[0027] Reference Figure 1 - Figure 3 The lifting assembly includes a guide rail 31, which is located on one side of the outer wall of the reactor 5. A motor 6 is fixedly connected to the top of the guide rail 31. The motor 6 drives the lead screw 8 to rotate, which is converted into the linear displacement of the slider 9. The output end of the motor 6 is fixedly connected to the lead screw 8. The outer wall of the lead screw 8 is threadedly connected to the slider 9. A connecting column 7 is fixedly connected to the outer wall of the slider 9. A base 4 is fixedly connected to the bottom of the guide rail 31. The outer sides of the gear 16 are respectively meshed with rack 17 and rack 28, which are used to drive the fixed column 19 and fixed column 20 to move. A sliding groove 25 is opened inside the base 26. The sliding groove 25 is used to provide a sliding track for the fixed block 24 to limit the movement direction of the baffle 23 and prevent it from deviating or getting stuck. The outer wall of the fixed block 24 slides inside the sliding groove 25. The stirring rod 30 is located inside the reactor 5 to accelerate the reaction of the reaction liquid. One end of the connecting column 7 is fixedly connected to the outer wall of the top cover 13 to drive the top cover 13 to move up and down. A condensing pipe 12 is fixedly connected to the outer wall of the top cover 13 to transport steam.
[0028] Specifically, after the raw materials are quantitatively fed into the reactor 5, the heating wire 27 conducts heat through the jacket to gradually raise the temperature of the reaction system. At the same time, the motor 210 drives the stirring rod 30 to form a three-dimensional turbulent flow field through the axial thrust of the spiral blade 28 and the radial shear of the impeller blade 29. This allows the reactants to be rapidly and homogenously mixed under high temperature and high pressure. After the reaction is completed, the motor 16 drives the slider 9 to rise and fall vertically along the guide rail 31 through the lead screw 8. The top cover 13 is then separated as a whole through the connecting column 7, ensuring that the opening and closing process of the top cover 13 is smooth and the sealing surface is accurately aligned.
[0029] Working principle: When the high-pressure reaction of ethyl formate is carried out, the raw material in the storage tank 1 is first transported to the reaction vessel 5 through the conveying pipe 3 by the water pump 2. During this process, the electric push rod 14 inside the outer shell 11 precisely extends and retracts to drive the baffle 15 to move laterally, which drives the fixed column 19 on its outer side to move synchronously, so that the rack 17 and the gear 16 mesh and drive. The rotation of the gear 16 further drives the rack 28 on the other side to move in the opposite direction. The rack 28 is guided and constrained by the fixed block 24 and the slide groove 25, pushing the fixed column 20 and the baffle 23 to slide in opposite directions, realizing the symmetrical complementary displacement of the two baffles. During this process, the slot 21 on the baffle 15 and the block 22 at the end of the baffle 23 form a dynamic interlocking structure, realizing the precise control of the feed amount by the double baffles.
[0030] In addition, after the quantitative raw materials enter the reactor 5, the stirring rod 30 driven by the second drive motor 10 drives the spiral blade 28 and the paddle blade 29 to work together to mix and stir, thereby accelerating the reaction. The reactor 5 is heated by the heating wire 27 in the inner jacket of the reactor 5, thereby achieving uniform heating of the raw materials and further accelerating the reaction time. After the reaction is completed, the lead screw 8 driven by the first motor 6 drives the slider 9 to rise and fall. Through the cooperation of the guide rail 31 and the slider 9, linear rise and fall are achieved. The top cover 13 is opened and closed through the connection of the connecting column 7.
[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A novel reactor for high pressure reaction of ethyl formate, comprising a storage tank (1), characterized in that: The storage tank (1) is equipped with a water pump (2) on top. The input end of the water pump (2) is fixedly connected to a delivery pipe (3). One end of the delivery pipe (3) is fixedly connected to a shell (11). A metering component is installed inside the shell (11). The quantitative component includes a base (26), a first baffle (15), and a second baffle (23). The base (26) is located inside the outer casing (11). The first baffle (15) is located on one side of the base (26), and the second baffle (23) is located on one side of the first baffle (15). An electric push rod (14) is provided on the top of the base (26), and a gear (16) is provided on the top of the base (26). The output end of the electric push rod (14) is fixedly connected to the first baffle (15), and a gear is fixedly connected to the outer wall of the first baffle (15). A fixing post 1 (19) is provided. A slot (21) is provided inside the baffle 1 (15). A rack 1 (17) is fixedly connected to the outer wall of the fixing post 1 (19). A rack 2 (18) is provided on one side of the outer wall of the rack 1 (17). A fixing block (24) is fixedly connected to the outer wall of the rack 2 (18). A fixing post 2 (20) is fixedly connected to the outer wall of the fixing block (24). One end of the fixing post 2 (20) is fixedly connected to the outer wall of the baffle 2 (23). A locking block (22) is fixedly connected to the outer wall of the baffle 2 (23).
2. The new type of reactor for high pressure reaction of ethyl formate according to claim 1, characterized in that: The outer wall of the outer shell (11) is fixedly connected to a top cover (13), and a reaction vessel (5) is provided at the bottom of the top cover (13). A lifting component is provided on one side of the outer wall of the reaction vessel (5). A second motor (10) is provided at the top of the top cover (13). A stirring rod (30) is fixedly connected to the output end of the second motor (10). A spiral blade (28) is fixedly connected to the outer wall of the stirring rod (30). A paddle (29) is fixedly connected to the bottom end of the stirring rod (30). A heating wire (27) is provided inside the reaction vessel (5).
3. The new type of reactor for high pressure reaction of ethyl formate according to claim 2, characterized in that: The lifting assembly includes a guide rail (31), which is set on one side of the outer wall of the reactor (5). A motor (6) is fixedly connected to the top of the guide rail (31), and a lead screw (8) is fixedly connected to the output end of the motor (6). A slider (9) is threadedly connected to the outer wall of the lead screw (8), and a connecting column (7) is fixedly connected to the outer wall of the slider (9). A base (4) is fixedly connected to the bottom of the guide rail (31).
4. The new type of reactor for high pressure reaction of ethyl formate according to claim 1, characterized in that: The outer walls of the gear (16) are respectively meshed with rack one (17) and rack two (18) to drive the fixed column one (19) and fixed column two (20) to move.
5. The new type of reactor for high pressure reaction of ethyl formate according to claim 1, characterized in that: The base (26) has a groove (25) inside, and the outer wall of the fixing block (24) slides inside the groove (25).
6. The novel high-pressure reactor for ethyl formate according to claim 2, characterized in that: The stirring rod (30) is located inside the reactor (5) to accelerate the reaction of the reaction liquid.
7. The new type of reactor for high pressure reaction of ethyl formate according to claim 3, characterized in that: One end of the connecting column (7) is fixedly connected to the outer wall of the top cover (13) to drive the top cover (13) to move up and down.
8. The new type of reactor for ethyl formate high pressure reaction according to claim 2, characterized in that: The top cover (13) is fixedly connected to a condensing pipe (12) for transporting steam.