Neutralization kettle for naphthoic acid production
By designing the stirring ends of multiple sets of spiral leaf plates in the naphtholic acid production neutralization kettle, the problem of insufficient gas contact in the reaction solution is solved, and the rapid and uniform diffusion of gas in the solution is achieved, production efficiency is improved and resource waste is avoided.
Patent Information
- Application Number
- CN202421998809.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-19
AI Technical Summary
In the way of passing gas into the solution in the reactor, some areas in the solution cannot fully contact the input gas, resulting in waste of resources and low production efficiency.
A neutralizing kettle for naphthoic acid production was designed, and the stirring end composed of multiple sets of spiral blade plates was used to stir and turn the reaction liquid in the reaction chamber, so that the carbon dioxide gas diffuses more rapidly and evenly in the solution.
By fully stirring the reaction solution, the uniform diffusion of carbon dioxide gas in the solution is ensured, the reaction production efficiency is improved, and the input carbon dioxide gas is effectively utilized, avoiding waste of resources.
Smart Images
Figure CN222918692U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of neutralization kettles for the production of 1-naphthoic acid, and specifically refers to a neutralization kettle for the production of naphthoic acid. Background Art
[0002] A neutralization kettle is a kettle-type stirring reactor for carrying out neutralization reactions and is a reaction kettle device for chemical production and experiments; naphthoic acid, also known as 1-naphthoic acid, is prepared as follows: First, 1-bromonaphthalene, magnesium chips, and absolute ether are made into 1-naphthylmagnesium bromide in the presence of a little iodine. After dissolving with benzene, carbon dioxide is introduced, and the reaction is controlled at -7 to 2°C. Then, a 25% sulfuric acid solution is slowly added until the reaction no longer proceeds and the excess magnesium dissolves. The benzene layer is separated, and 1-naphthoic acid in it is extracted with a 25% sodium hydroxide solution. Then, it is acidified with a 50% sulfuric acid solution to precipitate the crude product, and recrystallized with toluene to obtain a finished product with a recovery rate of about 70%.
[0003] In the step of introducing carbon dioxide gas into the reaction solution, generally, the end of the gas delivery pipe is extended into the bottom of the solution in the reaction kettle. Since the gas will move upward in the liquid, both the upper and lower layers of the reaction solution can contact the carbon dioxide gas. Although substances will eventually be evenly distributed in the solution, the gas outlet area of the gas delivery pipe is only a corner at the bottom of the solution. After the gas is discharged from the gas delivery pipe, it will first float vertically until it breaks through the liquid surface and enters the air. In this way, especially in the remaining areas at the bottom, they will not fully contact the input carbon dioxide gas, and it will also cause a certain waste of carbon dioxide raw material resources. In the process of industrial production of 1-naphthoic acid, this will undoubtedly increase costs and reduce efficiency. Therefore, a neutralization kettle for the production of naphthoic acid is needed. Summary of the Utility Model
[0004] I. Technical Problems to be Solved
[0005] The technical problem to be solved by the utility model is that the general method of introducing gas into the solution in the reaction kettle is to connect the gas delivery pipe to the bottom of the reaction solution, but this method only treats the symptoms and not the root cause, and there will still be some areas in the solution that cannot fully contact the input gas.
[0006] II. Technical Solutions
[0007] To solve the above technical problems, the technical solution provided by the utility model is: a neutralization kettle for the production of naphthoic acid, including a tank body, a reaction chamber is connected and arranged inside the tank body, a plurality of feeding ports connected to the reaction chamber are arranged on the tank body, a discharge pipe connected to the reaction chamber is arranged at the bottom end of the tank body, and a solenoid valve is connected to the discharge pipe.
[0008] A control box is connected and provided inside the top of the tank body. A stirring shaft is rotatably connected inside the control box. The bottom end of the stirring shaft extends into the reaction chamber and is connected with a plurality of spiral blade plates. A control mechanism for controlling the rotation and lifting of the stirring shaft is connected inside the control box.
[0009] Furthermore, an air delivery pipe is connected and provided outside one side of the tank body. The bottom end of the air delivery pipe is communicated with the bottom of the reaction chamber. An air pump is connected to the air delivery pipe. Carbon dioxide gas participating in the reaction is delivered into the reaction chamber through the air delivery pipe with an air pump. Connecting the air delivery pipe to the bottom of the reaction chamber is beneficial for the gas to automatically rise in the reaction liquid after entering the tank body.
[0010] Furthermore, the control mechanism includes a transmission shaft. A motor matched with the transmission shaft is connected and provided downward from the top end of the control box. A shaft sleeve with a slider inside is rotatably connected inside the top of the control box. The top end of the stirring shaft is slidably connected with the shaft sleeve. A limiting mechanism for the stirring shaft to rotate together with the shaft sleeve is connected to the top end of the stirring shaft. Through a gear transmission mechanism, the shaft sleeve and the stirring shaft are synchronously rotated, so as to drive the stirring end composed of multiple groups of spiral blade plates to stir the reaction liquid in the reaction chamber.
[0011] Furthermore, the limiting mechanism includes a sliding groove. The sliding groove is arranged at the top end of the stirring shaft. Just by the sliding groove fitting with the shaft sleeve with a slider, the stirring shaft can lift and stretch inside the shaft sleeve and can also rotate together with the shaft sleeve.
[0012] Furthermore, a first support shaft is rotatably connected to one side of the top end of the stirring shaft of the control box. A worm and gear transmission mechanism is jointly connected between the bottom of the first support shaft and the transmission shaft. A first turning handle is connected to one end of the first support shaft. A plurality of annular tooth grooves are connected to the stirring shaft below the sliding groove. A second support shaft is rotatably connected to one side of the bottom of the control box where the stirring shaft is located. A tooth disc matched with the annular tooth grooves is connected to the second support shaft. A second turning handle is connected to the second support shaft near the first turning handle. A support rod is jointly rotatably connected between the end of the first turning handle away from the support shaft and the end of the second turning handle away from the support shaft. The above part also belongs to a part of the control mechanism. This part is mainly used to realize the up and down reciprocating movement of the stirring shaft in the tank body, so as to turn the reaction liquid in the reaction chamber through the stirring end composed of multiple groups of spiral blade plates.
[0013] III. Beneficial effects
[0014] The advantages of the present utility model compared with the prior art are as follows: Based on the method of gas transmission at the bottom of the liquid, a stirring control mechanism for fully stirring the solution is added to this neutralization kettle device. The reaction solution is stirred and turned by the spiral blade plate on this mechanism, generating complex water flows in the solution. These water flows will carry the input carbon dioxide gas to various positions in the solution, enabling the carbon dioxide gas to diffuse more rapidly and be distributed more evenly in the solution. This not only improves the reaction production efficiency but also makes full use of the input carbon dioxide gas, avoiding waste. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic diagram of the external structure of a neutralization kettle for producing naphthoic acid according to the present utility model.
[0016] Figure 2 is a schematic diagram of the internal structure of a neutralization kettle for producing naphthoic acid according to the present utility model Figure 1 .
[0017] Figure 3 is a schematic diagram of the internal structure of a neutralization kettle for producing naphthoic acid according to the present utility model Figure 2 .
[0018] Figure 4 is Figure 2 a partial structure schematic diagram of.
[0019] Figure 5 is Figure 3 a partial structure schematic diagram of.
[0020] As shown in the figure: 1. Tank body, 2. Reaction chamber, 3. Feeding port, 4. Gas transmission pipe, 5. Air pump, 6. Discharge pipe, 7. Solenoid valve, 8. Stirring shaft, 9. Spiral blade plate, 10. Control box, 11. Sleeve, 12. Chute, 13. Gear transmission mechanism, 14. Transmission shaft, 15. Motor, 16. Support shaft one, 17. Worm and worm gear transmission mechanism, 18. Rotating handle one, 19. Support rod, 20. Rotating handle two, 21. Support shaft two, 22. Tooth disc, 23. Annular tooth groove. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0021] The following further detailed description of the present utility model is made in conjunction with the accompanying drawings.
[0022] Embodiment 1
[0023] Combined with the attached Figures 1-3, To solve the above technical problems, the technical solution provided by the present utility model is as follows: A neutralization kettle for naphthoic acid production, comprising a tank body 1, a reaction chamber 2 is connected and arranged inside the tank body 1, a plurality of feeding ports 3 communicating with the reaction chamber 2 are connected and arranged on the tank body 1, a discharge pipe 6 communicating with the reaction chamber 2 is connected and arranged at the bottom end of the tank body 1, a solenoid valve 7 is connected and arranged on the discharge pipe 6, an air delivery pipe 4 is connected and arranged outside one side of the tank body 1, the bottom end of the air delivery pipe 4 is communicated with the bottom of the reaction chamber 2, an air pump 5 is connected and arranged on the air delivery pipe 4, and carbon dioxide gas participating in the reaction is conveyed into the reaction chamber 2 through the air delivery pipe 4 with the air pump 5. Connecting the air delivery pipe 4 to the bottom of the reaction chamber 2 is beneficial to the automatic rise of the gas in the reaction liquid after the gas enters the tank body 1.
[0024] Various chemical raw materials participating in the reaction are fed into the reaction chamber 2 of the tank body 1 through the feeding ports 3. In order not to contaminate each other among the various raw materials, a plurality of feeding ports 3 are specially provided, and the specific number can be reasonably set and changed according to the objective operation process and requirements during use. The reaction liquid is discharged from the device through the discharge pipe 6 for subsequent further reaction and treatment, and an appropriate amount of carbon dioxide gas required in the reaction is input into the tank through the air delivery pipe 4.
[0025] Embodiment Two
[0026] Combined with the attached Figures 1-5, a control box 10 is connected and provided inside the top of the tank body 1. A stirring shaft 8 is rotatably connected inside the control box 10. The bottom end of the stirring shaft 8 extends into the reaction chamber 2 and is connected with a plurality of spiral blade plates 9. A control mechanism for controlling the rotation and lifting of the stirring shaft 8 is connected inside the control box 10. The control mechanism includes a transmission shaft 14. A motor 15 matched with the transmission shaft 14 is connected and provided downward at the top end of the control box 10. A sleeve 11 with a slider inside is rotatably connected inside the top of the control box 10. The top end of the stirring shaft 8 is slidably connected with the sleeve 11. A limiting mechanism for the stirring shaft 8 to rotate together with the sleeve 11 is connected to the top end of the stirring shaft 8. The limiting mechanism includes a chute 12. The chute 12 is arranged at the top end of the stirring shaft 8. The chute 12 just fits with the sleeve 11 with a slider, so that the stirring shaft 8 can lift and stretch in the sleeve 11 and can rotate together with the sleeve 11 at the same time. Through the gear transmission mechanism 13, the sleeve 11 and the stirring shaft 8 are synchronously rotated, so as to drive the stirring end composed of multiple groups of spiral blade plates 9 to stir the reaction liquid in the reaction chamber 2. A support shaft one 16 is rotatably connected at one side of the top end of the stirring shaft 8 of the control box 10. A worm and gear transmission mechanism 17 is jointly connected between the bottom of the support shaft one 16 and the transmission shaft 14. A handle one 18 is connected to one end of the support shaft one 16. A plurality of annular tooth grooves 23 are connected to the stirring shaft 8 below the chute 12. A support shaft two 21 is rotatably connected at one side of the bottom of the control box 10 where the stirring shaft 8 is located. A tooth disc 22 matched with the annular tooth grooves 23 is connected to the support shaft two 21. A handle two 20 is connected to one end of the support shaft two 21 close to the handle one 18. A support rod 19 is jointly rotatably connected between the end of the handle one 18 far from the support shaft one 16 and the end of the handle two 20 far from the support shaft two 21, mainly used to realize the reciprocating movement of the stirring shaft 8 up and down in the tank body 1, so as to turn the reaction liquid in the reaction chamber 2 through the stirring end composed of multiple groups of spiral blade plates 9.
[0027] Power is provided by the operation of the motor 15, and the transmission shaft 14 rotates. First, through the gear transmission mechanism 13 at the top of the transmission shaft 14, the shaft sleeve 11 rotates together with the transmission shaft 14, thereby driving the stirring shaft 8 and the spiral blade 9 to rotate in the reaction chamber 2 to agitate the reaction liquid. At the same time, through the worm and worm gear transmission mechanism 17 at the bottom of the transmission shaft 14, the support shaft one 16 rotates, causing the handle one 18 at the end of the support shaft one 16 to rotate around the support shaft one 16. Also, under the transmission action of the support rod 19, the support shaft two 21 with the handle two 20 also rotates. However, due to the limiting connection method of the support rod 19 with the two handles, the rotation of the support shaft two 21 is repeated. With the cooperation of the tooth disc 22 and the annular tooth groove 23, the stirring shaft 8 is repeatedly pushed up and down, which realizes the up and down turning of the reaction liquid by the stirring end composed of multiple spiral blades 9. Through this stirring method, the carbon dioxide gas introduced from one side at the bottom of the reaction liquid can be quickly and evenly diffused.
[0028] When the present utility model is specifically implemented and when using this neutralization kettle device, various chemical raw materials are put into the reaction chamber 2 of the tank body 1 one by one according to the preparation method of 1-naphthoic acid. When it comes to the step of introducing an appropriate amount of carbon dioxide gas into the solution, the carbon dioxide gas is input through the gas transmission pipe 4 on the lower side. The gas transmission pipe 4 is located on one side at the bottom of the reaction chamber 2. At this time, the control mechanism with a stirring function in this device makes the spiral blade 9 rotate and move up and down at the same time. This enables the carbon dioxide gas introduced into the corner to flow together with the churning water flow and quickly and relatively evenly scatter into each area of the reaction liquid to participate in the reaction, which provides the process of manufacturing 1-naphthoic acid in production.
[0029] The above describes the present utility model and its implementation manners. This description is not restrictive, and what is shown in the drawings is only one of the implementation manners of the present utility model. The actual structure is not limited to this. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the creative purpose of the present utility model, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present utility model.
Claims
1. A neutralization kettle for naphthoic acid production, comprising a tank body (1), a reaction chamber (2) connected to the tank body (1), a plurality of feed ports (3) connected to the tank body (1) and communicating with the reaction chamber (2), a discharge pipe (6) connected to the bottom end of the tank body (1) and communicating with the reaction chamber (2), a solenoid valve (7) connected to the discharge pipe (6), characterized in that: A control box (10) is connected to the top of the tank body (1), a stirring shaft (8) is rotatably connected to the control box (10), a bottom end of the stirring shaft (8) extends to the reaction chamber (2) and is connected to a plurality of spiral blades (9), and a control mechanism for controlling the rotation and lifting of the stirring shaft (8) is connected to the control box (10).
2. A neutralization kettle for naphthoic acid production according to claim 1, characterized in that: An air delivery pipe (4) is externally connected to one side of the tank body (1), the bottom end of the air delivery pipe (4) is connected to the bottom of the reaction chamber (2), and an air pump (5) is connected to the air delivery pipe (4).
3. A neutralization kettle for naphthoic acid production according to claim 1, characterized in that: The control mechanism comprises a transmission shaft (14); the top of the control box (10) is downwardly connected to a motor (15) matched with the transmission shaft (14); the top of the control box (10) is rotatably connected to a shaft sleeve (11) with a slider inside; the top of the stirring shaft (8) and the shaft sleeve (11) are slidably connected to each other; and the top of the stirring shaft (8) is connected to a limiting mechanism for the stirring shaft (8) to rotate together with the shaft sleeve (11).
4. A neutralization kettle for naphthoic acid production according to claim 3, characterized in that: The limiting mechanism comprises a slide groove (12), and the slide groove (12) is arranged on the top end of the stirring shaft (8).
5. A neutralization kettle for naphthoic acid production according to claim 3, characterized in that: The control box (10) is rotatably connected to a support shaft (16) located at one side of the top end of the stirring shaft (8); a worm gear transmission mechanism (17) is commonly connected between the support shaft (16) and the bottom of the transmission shaft (14); a handle (18) is commonly connected to one end of the support shaft (16); the stirring shaft (8) is located below the slide groove (12) and is commonly connected to a plurality of annular tooth grooves (23); the bottom of the control box (10) is rotatably connected to a support shaft (21) located at one side of the stirring shaft (8); a toothed disc (22) matching the annular tooth grooves (23) is commonly connected to the support shaft (21); an end of the support shaft (21) close to the handle (18) is commonly connected to the handle (20); and a support rod (19) is commonly rotatably connected between an end of the handle (18) away from the support shaft (16) and an end of the handle (20) away from the support shaft (21).