Device for preparing m-aminobenzotrifluoride

Abstract

The utility model discloses a device for preparing m-aminotrifluorotoluene, which comprises a second mixing tank, the upper end of the second mixing tank is connected with a connecting pipe, one side of the second mixing tank is fixedly provided with a support frame, the support frame is provided with a first mixing tank, the upper end of the connecting pipe is connected with one side of the lower end of the first mixing tank, and the lower end of the connecting pipe is connected with the other side of the second mixing tank. One side of the upper end of the first mixing tank is connected with an adding box, and one sides of the lower ends of the adding box and the second mixing tank are connected with a first circulating mechanism. According to the utility model, the circular flow of raw materials is realized, and the spraying function of the spraying mechanism is combined, so that the stirring dead angle of the traditional stirring device is broken, the liquid raw materials can be fully mixed in the first mixing tank and the second mixing tank, the mixing uniformity is greatly improved, and the obtained liquid raw materials can be more fully contacted and reacted; the reaction time and energy consumption are reduced, and the overall efficiency of the reaction is improved, so that the product yield in unit time is increased.

Description

Technical Field

[0001] This utility model relates to the field of preparation technology of m-aminotrifluorotoluene, and in particular to an apparatus for preparing m-aminotrifluorotoluene. Background Technology

[0002] m-Aminotrifluorotoluene, an organic synthesis intermediate widely used in pharmaceuticals, pesticides, dyes, and other important fields, directly impacts the performance and market competitiveness of downstream products through the quality and efficiency of its preparation process. In the synthesis of m-aminotrifluorotoluene, thorough mixing of liquid raw materials is crucial for ensuring a smooth reaction. While traditional stirring devices can achieve liquid mixing to some extent, they suffer from inherent limitations.

[0003] Traditional mixing devices typically rely on a single impeller to stir within a fixed area. This method easily creates dead zones in the corners and edges of the container. In these areas, the liquid raw material flows slowly, failing to fully contact and mix with other materials, resulting in uneven mixing. Uneven mixing can cause a series of serious problems, such as inconsistent reaction rates, and some raw materials remaining due to failure to participate in the reaction in time, reducing the overall efficiency of the reaction. Furthermore, uneven mixing can lead to side reactions and the generation of impurities, thereby reducing the purity and quality of the product. This not only increases production costs but may also affect the product's reputation and sales in the market. To address these issues, we propose an apparatus for preparing m-aminotrifluorotoluene. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an apparatus for preparing m-aminotrifluorotoluene.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An apparatus for preparing m-aminotrifluorotoluene includes a second mixing tank, a connecting pipe connected to the upper end of the second mixing tank, a support frame fixed to one side of the second mixing tank, a first mixing tank mounted on the support frame, the upper end of the connecting pipe connected to the lower side of the first mixing tank, an addition box connected to the upper side of the first mixing tank, a first circulation mechanism connected to the addition box and the lower side of the second mixing tank, spray structures fixed to both sides of the first mixing tank, one end of the spray structure connected to the second circulation mechanism, one end of the second circulation mechanism connected to the middle side of the second mixing tank, multiple sensor groups equally spaced installed on the circumferential sidewall inside the second mixing tank, and auxiliary mixing mechanisms installed inside both the first and second mixing tanks.

[0007] Preferably, a fixing pipe is connected to one side of the upper end of the first mixing tank, an adding box is connected to the upper end of the fixing pipe, a feeding pipe is connected to one side of the upper end of the adding box, and a discharging pipe is connected to one side of the lower end of the second mixing tank. Both the discharging pipe and the feeding pipe are equipped with electric valves.

[0008] Preferably, the first circulation mechanism includes a first circulation pipe connected to one side of the upper end of the adding tank, a first circulation pump connected to one side of the lower end of the first circulation pipe, the first circulation pump being mounted on a support frame, and one end of the first circulation pump being connected to one side of the lower end of the second mixing tank.

[0009] Preferably, the spraying structure includes two spray pipes fixed on both sides of the first mixing tank, and one end of the four spray pipes is connected by a conveying pipeline. The conveying pipeline consists of two U-shaped pipes and a connecting pipe. The two U-shaped pipes are respectively connected to one end of the two spray pipes, and the connecting pipe is connected between the two U-shaped pipes. Multiple spray holes are provided at equal intervals on one side of the spray pipes, and the spray holes are connected to the first mixing tank.

[0010] Preferably, the second circulation mechanism includes a second circulation pipe connected to one side of the connecting pipe, one end of the second circulation pipe being connected to a second circulation pump, and one end of the second circulation pump being connected to one side of the middle of the second mixing tank.

[0011] Preferably, the auxiliary mixing mechanism includes a drive motor fixed to the bottom of the second mixing tank and one side of the first mixing tank. The output shaft of the drive motor is connected to a stirring rod, and multiple stirring blades are fixed at equal intervals around the stirring rod.

[0012] In this invention, during mixing:

[0013] 1. Raw material addition: When it is necessary to mix liquid raw materials, the operator sends the liquid raw materials into the addition tank through the feeding pipe. After the addition is completed, the electric valve on the feeding pipe is closed to prevent raw material leakage. The raw materials enter the first mixing tank from the addition tank through the fixed pipe.

[0014] 2. Preliminary mixing and circulation: After the raw materials enter the first mixing tank, the drive motor drives the stirring rod and stirring blade to rotate, and the raw materials are initially mixed. The mixed raw materials flow into the second mixing tank through the connecting pipe. The first circulation mechanism starts to work. The first circulation pump circulates the raw materials at the bottom of the second mixing tank to the addition tank through the first circulation pipe, so that the raw materials at the bottom can participate in the mixing process again.

[0015] 3. Spray mixing and secondary circulation: When the second circulation mechanism is activated, the second circulation pump transports the raw material in the middle of the second mixing tank to the conveying pipeline through the second circulation pipe, and then sprays it into the first mixing tank through the spray nozzle on the spray pipe. The spray method can increase the fluidity and dispersion of the raw material, so that the raw material is more fully mixed in the first mixing tank. The mixed raw material flows back into the second mixing tank through the connecting pipe.

[0016] 4. Further mixing and testing: Inside the second mixing tank, another drive motor drives the stirring rod and stirring blades to further mix the raw materials. Combined with the cyclic action of the first and second circulation mechanisms, the mixing efficiency and effect are greatly improved. At the same time, the sensor group monitors the raw materials in the second mixing tank in real time to ensure that the mixing quality meets the requirements.

[0017] 5. Discharge: After the mixing reaches the predetermined requirements, open the electric valve on the discharge pipe to discharge the mixed raw materials from the second mixing tank and proceed to the next reaction or processing step.

[0018] This utility model has the following advantages:

[0019] 1. The first and second circulation mechanisms realize the circulation flow of raw materials. Combined with the spraying effect of the spray structure, the dead zone of the traditional stirring device is broken, so that the liquid raw materials can be fully mixed in the first and second mixing tanks, which greatly improves the uniformity of mixing.

[0020] 2. Uniform mixing allows liquid raw materials to come into more complete contact and react, reducing reaction time and energy consumption, improving the overall efficiency of the reaction, and thus increasing the product yield per unit time.

[0021] 3. Due to the uniform mixing, side reactions are reduced and impurities are decreased, thereby improving the purity and quality of m-aminotrifluorotoluene.

[0022] 4. The sensor array can monitor various parameters during the mixing process in real time, such as temperature and concentration. Operators can adjust the operating parameters of the device in a timely manner based on the detection results to ensure the stability and reliability of the mixing process.

[0023] In summary, this invention achieves the circulation of raw materials. Combined with the spraying effect of the spray structure, it breaks the dead zone of traditional stirring devices, allowing liquid raw materials to be fully mixed in the first and second mixing tanks, greatly improving the uniformity of mixing. This allows the liquid raw materials to come into more complete contact and react, reducing reaction time and energy consumption, improving the overall efficiency of the reaction, and thus increasing the product yield per unit time. Attached Figure Description

[0024] Figure 1This is a structural diagram of the present invention;

[0025] Figure 2 This is a structural diagram of the spraying structure of this utility model;

[0026] Figure 3 This is a structural diagram of the auxiliary mixing mechanism of this utility model;

[0027] Figure 4 A structural diagram of the sensor assembly of this utility model is provided.

[0028] In the diagram: 1 First circulation pipe, 2 Feeding pipe, 3 Adding box, 4 Fixed pipe, 5 First mixing tank, 6 Spray pipe, 7 Conveying pipeline, 8 Second circulation pipe, 9 Second mixing tank, 10 Discharge pipe, 11 Drive motor, 12 First circulation pump, 13 Second circulation pump, 14 Connecting pipe, 15 Support frame, 16 Sensor group, 17 Stirring blade, 18 Stirring rod, 19 Spray hole. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] Reference Figure 1-4 An apparatus for preparing m-aminotrifluorotoluene includes a second mixing tank 9, with a connecting pipe 14 connected to the upper end of the second mixing tank 9. A support frame 15 is fixed to one side of the second mixing tank 9, and a first mixing tank 5 is mounted on the support frame 15. The upper end of the connecting pipe 14 is connected to one side of the lower end of the first mixing tank 5. An addition box 3 is connected to one side of the upper end of the first mixing tank 5. A first circulation mechanism is connected to one side of the lower end of the second mixing tank 9. Spray structures are fixed on both sides of the first mixing tank 5. One end of the spray structure is connected to a second circulation mechanism. One end of the second circulation mechanism is connected to one side of the middle of the second mixing tank 9. Multiple sensor groups 16 are installed at equal intervals on the circumferential sidewall inside the second mixing tank 9. An auxiliary mixing mechanism is installed inside both the first mixing tank 5 and the second mixing tank 9. The sensor groups 16 can detect various parameters of the raw materials in the second mixing tank 9 in real time, such as temperature and concentration, to ensure that the mixing quality meets the requirements.

[0031] A fixed pipe 4 is connected to the upper side of the first mixing tank 5, and an adding box 3 is connected to the upper end of the fixed pipe 4. A feeding pipe 2 is connected to the upper side of the adding box 3. A discharge pipe 10 is connected to the lower side of the second mixing tank 9. Both the discharge pipe 10 and the feeding pipe 2 are equipped with electric valves. The feeding pipe 2 is used to add liquid raw materials into the adding box 3. Both the discharge pipe 10 and the feeding pipe 2 are equipped with electric valves. The electric valves can precisely control the addition and discharge of raw materials to avoid raw material leakage and improve the safety and accuracy of operation. During the addition process, the operator needs to control the speed and amount of addition according to the process requirements to ensure the accurate ratio of raw materials. After the addition is completed, the electric valve on the feeding pipe 2 is closed to prevent raw material leakage.

[0032] The first circulation mechanism includes a first circulation pipe 1 connected to the upper side of the addition tank 3, and a first circulation pump 12 connected to the lower side of the first circulation pipe 1. The first circulation pump 12 is mounted on the support frame 15, and one end of the first circulation pump 12 is connected to the lower side of the second mixing tank 9. The function of the first circulation mechanism is to circulate and transport the raw materials at the bottom of the second mixing tank 9 to the addition tank 3, so that the raw materials at the bottom can participate in the mixing process again and improve the uniformity of mixing.

[0033] The spraying structure includes two spray pipes 6 fixed on both sides of the first mixing tank 5. One end of the four spray pipes 6 is connected through a conveying pipe 7. The conveying pipe 7 consists of two U-shaped pipes and a connecting pipe. The two U-shaped pipes are respectively connected to one end of the two spray pipes 6, and the connecting pipe is connected between the two U-shaped pipes. Multiple spray holes 19 are provided at equal intervals on one side of the spray pipes 6, and the spray holes 19 are connected to the first mixing tank 5. The spraying structure and the second circulation mechanism work together to convey the raw materials in the middle of the second mixing tank 9 to the first mixing tank 5 by spraying, thereby increasing the fluidity and dispersion of the raw materials and making the raw materials more fully mixed.

[0034] The second circulation mechanism includes a second circulation pipe 8 connected to one side of the connecting pipe. One end of the second circulation pipe 8 is connected to a second circulation pump 13. One end of the second circulation pump 13 is connected to the middle side of the second mixing tank 9. The auxiliary mixing mechanism includes a drive motor 11 fixed to the bottom of the second mixing tank 9 and one side of the first mixing tank 5. The output shaft of the drive motor 11 is connected to a stirring rod 18. Multiple stirring blades 17 are fixed at equal intervals around the stirring rod 18. The auxiliary mixing mechanism drives the stirring rod 18 and stirring blades 17 to rotate through the drive motor 11, thereby stirring and mixing the raw materials and improving the mixing efficiency.

[0035] In this invention, during mixing:

[0036] 1. Raw material addition: When it is necessary to mix liquid raw materials, the operator sends the liquid raw materials into the addition tank 3 through the feeding pipe 2. After the addition is completed, the electric valve on the feeding pipe 2 is closed to prevent raw material leakage. The raw materials enter the first mixing tank 5 from the addition tank 3 through the fixed pipe 4.

[0037] 2. Preliminary mixing and circulation: After the raw materials enter the first mixing tank 5, the drive motor 11 drives the stirring rod 18 and stirring blade 17 to rotate, and performs preliminary mixing of the raw materials. The mixed raw materials flow into the second mixing tank 9 through the connecting pipe 14. The first circulation mechanism starts to work. The first circulation pump 12 circulates the raw materials at the bottom of the second mixing tank 9 to the addition box 3 through the first circulation pipe 1, so that the raw materials at the bottom can participate in the mixing process again.

[0038] 3. Spray mixing and secondary circulation: The second circulation mechanism is started, and the second circulation pump 13 transports the raw material in the middle of the second mixing tank 9 to the conveying pipeline 7 through the second circulation pipe 8, and then sprays it into the first mixing tank 5 through the spray hole 19 on the spray pipe 6. The spray method can increase the fluidity and dispersion of the raw material, so that the raw material is more fully mixed in the first mixing tank 5. The mixed raw material flows back into the second mixing tank 9 through the connecting pipe 14.

[0039] 4. Further mixing and testing: Inside the second mixing tank 9, another drive motor 11 drives the stirring rod 18 and stirring blade 17 to further mix the raw materials. Combined with the cyclic action of the first and second circulation mechanisms, the mixing efficiency and effect are greatly improved. At the same time, the sensor group 16 detects the raw materials in the second mixing tank 9 in real time to ensure that the mixing quality meets the requirements.

[0040] 5. Discharge: When the mixing reaches the predetermined requirements, open the electric valve on the discharge pipe 10 to discharge the mixed raw materials from the second mixing tank 9 and proceed to the next reaction or processing step.

[0041] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. An apparatus for preparing m-aminotrifluorotoluene, comprising a second mixing tank (9), characterized in that, The upper end of the second mixing tank (9) is connected to a connecting pipe (14), and a support frame (15) is fixed on one side of the second mixing tank (9). The first mixing tank (5) is installed on the support frame (15). The upper end of the connecting pipe (14) is connected to the lower end of the first mixing tank (5). The upper end of the first mixing tank (5) is connected to an addition box (3). The addition box (3) and the lower end of the second mixing tank (9) are connected to a first circulation mechanism. Both sides of the first mixing tank (5) are fixed with spray structures. One end of the spray structure is connected to a second circulation mechanism. One end of the second circulation mechanism is connected to the middle side of the second mixing tank (9). Multiple sensor groups (16) are installed at equal intervals on the circumferential sidewall inside the second mixing tank (9). Both the first mixing tank (5) and the second mixing tank (9) are equipped with auxiliary mixing mechanisms.

2. The apparatus for preparing m-aminotrifluorotoluene according to claim 1, characterized in that: A fixed pipe (4) is connected to the upper side of the first mixing tank (5), and an addition box (3) is connected to the upper end of the fixed pipe (4). A feeding pipe (2) is connected to the upper side of the addition box (3). A discharge pipe (10) is connected to the lower side of the second mixing tank (9). Electric valves are provided on both the discharge pipe (10) and the feeding pipe (2).

3. The apparatus for preparing m-aminotrifluorotoluene according to claim 2, characterized in that: The first circulation mechanism includes a first circulation pipe (1) connected to the upper side of the addition tank (3), a first circulation pump (12) connected to the lower side of the first circulation pipe (1), the first circulation pump (12) is mounted on the support frame (15), and one end of the first circulation pump (12) is connected to the lower side of the second mixing tank (9).

4. The apparatus for preparing m-aminotrifluorotoluene according to claim 1, characterized in that: The spray structure includes two spray pipes (6) fixed on both sides of the first mixing tank (5). One end of the four spray pipes (6) is connected through a conveying pipeline (7). The conveying pipeline (7) consists of two U-shaped pipes and a connecting pipe. The two U-shaped pipes are respectively connected to one end of the two spray pipes (6). The connecting pipe is connected between the two U-shaped pipes. A plurality of spray holes (19) are provided at equal intervals on one side of the spray pipes (6), and the spray holes (19) are connected to the first mixing tank (5).

5. The apparatus for preparing m-aminotrifluorotoluene according to claim 4, characterized in that: The second circulation mechanism includes a second circulation pipe (8) connected to one side of the connecting pipe, one end of the second circulation pipe (8) is connected to a second circulation pump (13), and one end of the second circulation pump (13) is connected to the middle side of the second mixing tank (9).

6. The apparatus for preparing m-aminotrifluorotoluene according to claim 1, characterized in that: The auxiliary mixing mechanism includes a drive motor (11) fixed at the bottom of the second mixing tank (9) and on one side of the first mixing tank (5). The output shaft of the drive motor (11) is connected to a stirring rod (18), and multiple stirring blades (17) are fixed at equal intervals around the stirring rod (18).

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