Fluorination reaction kettle for producing 3, 4-difluorobenzonitrile

Abstract

The utility model relates to the technical field of 3, 4-difluorobenzonitrile production, in particular to a fluorination reaction kettle for 3, 4-difluorobenzonitrile production, which is provided with a scraping mechanism and a discharging mechanism, so that materials adhered to the inner wall can be scraped in the 3, 4-difluorobenzonitrile production process, and the discharging yield of the materials is improved; comprising a stirring mechanism; the device further comprises a scraping mechanism, a heat preservation mechanism, a pressure relief mechanism and a discharging mechanism, the scraping mechanism is installed in the stirring mechanism, the heat preservation mechanism is installed on the stirring mechanism, the pressure relief mechanism is installed on the heat preservation mechanism, and the discharging mechanism is installed at the lower end of the stirring mechanism; the stirring mechanism is used for stirring, the scraping mechanism is used for scraping, the heat preservation mechanism is used for heat preservation, the pressure relief mechanism is used for pressure relief, and the discharging mechanism is used for discharging.

Description

Technical Field

[0001] This utility model relates to the technical field of 3,4-difluorobenzonitrile production, and in particular to a fluorination reaction vessel for the production of 3,4-difluorobenzonitrile. Background Technology

[0002] 3,4-Difluorobenzonitrile is an important intermediate for the selective herbicide cyhalofop-butyl. Cyhalofop-butyl is a selective herbicide used in rice, and it is quite safe for both transplanted and direct-seeded rice. It is internationally recognized as an excellent rice herbicide.

[0003] In existing fluorination reactors for the production of 3,4-difluorobenzonitrile, for example, the reactor and production process for the preparation of 2,6-difluorobenzonitrile disclosed in invention patent application number 202210702319.3, the main body of the reactor can meet the requirements of multiple cooling and heating in the preparation process of difluorobenzonitrile. At the same time, the heat in the cooling and heating process is circulated in a closed loop, reducing the influence of the external heat transfer medium, reducing excessive heat loss in the preparation process, reducing heat waste, making it more energy-saving and environmentally friendly, reducing production costs, and shortening the cooling and heating time to improve production efficiency.

[0004] However, during the production of 3,4-difluorobenzonitrile, the material adheres to the inner wall of the equipment, making it difficult to remove and reducing processing efficiency. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a fluorination reactor for 3,4-difluorobenzonitrile production, which can scrape off the material adhering to the inner wall during the production process of 3,4-difluorobenzonitrile by setting a scraping mechanism and a discharge mechanism, thereby improving the material discharge rate.

[0006] The present invention relates to a fluorination reactor for the production of 3,4-difluorobenzonitrile, which includes a stirring mechanism; it also includes a scraping mechanism, a heat preservation mechanism, a pressure relief mechanism and a discharge mechanism. The scraping mechanism is installed inside the stirring mechanism, the heat preservation mechanism is installed on the stirring mechanism, the pressure relief mechanism is installed on the heat preservation mechanism, and the discharge mechanism is installed at the lower end of the stirring mechanism.

[0007] The stirring mechanism stirs the material, the scraping mechanism scrapes away the material, the heat preservation mechanism keeps the material warm, the pressure relief mechanism relieves pressure, and the discharge mechanism discharges the material. By opening the stirring mechanism, the material is stirred; simultaneously, the scraping mechanism removes the material adsorbed on the inner wall of the device; the heat preservation mechanism keeps the device warm; and simultaneously, the pressure relief mechanism relieves pressure. After the reaction is complete, the discharge mechanism filters and sorts the material for discharge. Thus, in the production process of 3,4-difluorobenzonitrile, the material adhering to the inner wall can be scraped off, improving the material discharge rate.

[0008] Preferably, the mixing mechanism includes a mixing chamber, a mixing shaft, and a motor. The mixing shaft is rotatably mounted on the mixing chamber, and the input end of the mixing shaft extends to the upper side of the mixing chamber. The motor is mounted on the upper end of the mixing chamber, and the output end of the motor is connected to the input end of the mixing shaft. By turning on the motor, the mixing shaft is driven to rotate, and the material is mixed while the mixing shaft is rotating.

[0009] Preferably, the scraping mechanism includes a main gear, a driven gear, a gear ring, and a scraper frame. The main gear is mounted on the stirring shaft, the driven gear is rotatably mounted inside the stirring chamber and meshes with the main gear, the gear ring is rotatably mounted inside the stirring chamber and meshes with the driven gear, and the scraper frame is mounted on the lower end of the gear ring. The rotation of the stirring shaft drives the main gear to rotate, and the main gear meshes with the driven gear to make the driven gear rotate. The driven gear meshes with the gear ring to make the gear ring drive the scraper frame to rotate and scrape the inner wall of the device.

[0010] Preferably, the insulation mechanism includes an insulation chamber and a temperature control chamber. The insulation chamber is installed on the mixing chamber, and the temperature control chamber is installed at the right end of the insulation chamber. The boiling water and warm water are mixed in the temperature control chamber to form a temperature-controlled mixture, which is then discharged into the insulation chamber to keep the mixing chamber warm.

[0011] Preferably, the pressure relief mechanism includes a neutralization chamber, a gas guide pipe, and a one-way valve. The neutralization chamber is installed at the left end of the insulation chamber. The inlet end of the gas guide pipe extends into the mixing chamber, and the outlet end of the gas guide pipe extends into the neutralization chamber. The one-way valve is installed on the gas guide pipe. The gas flow direction is controlled by the one-way valve. The gas discharged from the one-way valve is neutralized by the neutralizing liquid in the neutralization chamber and then discharged to relieve pressure.

[0012] Preferably, the discharge mechanism includes a discharge chamber, a filter auger, a spiral impeller, and a second motor. The discharge chamber is installed at the lower end of the mixing chamber, the filter auger is installed inside the discharge chamber, the spiral impeller is rotatably installed inside the filter auger, and the input end of the spiral impeller extends to the right side of the filter auger. The second motor is installed at the right end of the filter auger, and the output end of the second motor is connected to the input end of the spiral impeller. The filter auger separates the material into solid and liquid components, the discharge chamber discharges the liquid, and the second motor drives the spiral impeller to rotate and discharge the solid components.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: by opening the stirring mechanism to stir the material, the scraping mechanism scrapes off the material adsorbed on the inner wall of the device, the heat preservation mechanism keeps the device warm, and the pressure relief mechanism relieves the pressure of the device. After the reaction is completed, the material is filtered and classified and discharged by opening the discharge mechanism. Thus, in the production process of 3,4-difluorobenzonitrile, the material adhering to the inner wall can be scraped off, thereby improving the material discharge rate. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the isometric structure of this utility model;

[0015] Figure 2 This is a frontal sectional isometric structural schematic diagram of this utility model;

[0016] Figure 3 This is a bottom-view sectional isometric structural schematic diagram of this utility model;

[0017] Figure 4 The material feeding mechanism of this utility model is in Figure 2 Axonometric enlarged structural schematic diagram of the frontal cross-section of section A in the middle;

[0018] The attached diagram is labeled as follows: 1. Stirring mechanism; 11. Stirring chamber; 12. Stirring shaft; 13. Motor 1; 2. Scraping mechanism; 21. Main gear; 22. Driven gear; 23. Gear ring; 24. Scraper frame; 3. Insulation mechanism; 31. Insulation chamber; 32. Temperature control chamber; 4. Pressure relief mechanism; 41. Neutralization chamber; 42. Air guide pipe; 43. One-way valve; 5. Discharge mechanism; 51. Liquid discharge chamber; 52. Filter auger; 53. Spiral blade shaft; 54. Motor 2. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0020] Example 1

[0021] like Figures 1 to 4 As shown, a fluorination reactor for producing 3,4-difluorobenzonitrile includes a stirring mechanism 1, a scraping mechanism 2, a heat preservation mechanism 3, a pressure relief mechanism 4, and a discharge mechanism 5. The scraping mechanism 2 is installed inside the stirring mechanism 1, the heat preservation mechanism 3 is installed on the stirring mechanism 1, the pressure relief mechanism 4 is installed on the heat preservation mechanism 3, and the discharge mechanism 5 is installed at the lower end of the stirring mechanism 1.

[0022] The stirring mechanism 1 stirs, the scraping mechanism 2 scrapes, the heat preservation mechanism 3 keeps the material warm, the pressure relief mechanism 4 relieves pressure, and the material discharge mechanism 5 discharges the material.

[0023] The stirring mechanism 1 includes a stirring chamber 11, a stirring shaft 12, and a motor 13. The stirring shaft 12 is rotatably mounted on the stirring chamber 11, and the input end of the stirring shaft 12 extends to the upper side of the stirring chamber 11. The motor 13 is mounted on the upper end of the stirring chamber 11, and the output end of the motor 13 is connected to the input end of the stirring shaft 12.

[0024] The scraping mechanism 2 includes a main gear 21, a driven gear 22, a gear ring 23, and a scraper frame 24. The main gear 21 is mounted on the stirring shaft 12. The driven gear 22 is rotatably mounted in the stirring chamber 11 and meshes with the main gear 21. The gear ring 23 is rotatably mounted in the stirring chamber 11 and meshes with the driven gear 22. The scraper frame 24 is mounted on the lower end of the gear ring 23.

[0025] The insulation mechanism 3 includes an insulation chamber 31 and a temperature control chamber 32. The insulation chamber 31 is installed on the mixing chamber 11, and the temperature control chamber 32 is installed at the right end of the insulation chamber 31.

[0026] The pressure relief mechanism 4 includes a neutralization chamber 41, a gas guide pipe 42, and a one-way valve 43. The neutralization chamber 41 is installed at the left end of the heat preservation chamber 31. The inlet end of the gas guide pipe 42 extends into the stirring chamber 11, and the outlet end of the gas guide pipe 42 extends into the neutralization chamber 41. The one-way valve 43 is installed on the gas guide pipe 42.

[0027] The discharge mechanism 5 includes a discharge chamber 51, a filter auger 52, a spiral blade shaft 53, and a second motor 54. The discharge chamber 51 is installed at the lower end of the mixing chamber 11. The filter auger 52 is installed inside the discharge chamber 51. The spiral blade shaft 53 is rotatably installed inside the filter auger 52, and the input end of the spiral blade shaft 53 extends to the right side of the filter auger 52. The second motor 54 is installed at the right end of the filter auger 52, and the output end of the second motor 54 is connected to the input end of the spiral blade shaft 53.

[0028] By turning on the motor 13, the stirring shaft 12 is driven to rotate, stirring the material. Simultaneously, the rotation of the stirring shaft 12 drives the main gear 21 to rotate, which in turn meshes with the driven gear 22, causing the driven gear 22 to rotate. The driven gear 22, in turn, meshes with the gear ring 23, causing the gear ring 23 to drive the scraper frame 24 to rotate and scrape the inner wall of the device. Boiling water and warm water are mixed in the temperature control chamber 32 to form a temperature-controlled mixture, which is then discharged into the insulation chamber 31 to affect the stirring chamber 11. The system is kept warm, and the gas flow is controlled by a one-way valve 43. The gas discharged from the one-way valve 43 is neutralized by the neutralizing liquid in the neutralization chamber 41 and then discharged to release pressure. After the reaction is completed, the material is separated into solid and liquid by a filter screw conveyor 52. The liquid is discharged through the discharge chamber 51. The screw shaft 53 is rotated by turning on the motor 54 to discharge the solid. Thus, in the production process of 3,4-difluorobenzonitrile, the material adhering to the inner wall can be scraped off, improving the material discharge rate.

[0029] like Figures 1 to 4As shown, this utility model discloses a fluorination reactor for the production of 3,4-difluorobenzonitrile. During operation, the stirring shaft 12 is rotated by activating motor 13. Simultaneously, the rotating shaft 12 stirs the material. The rotation of the stirring shaft 12 also drives the main gear 21 to rotate. The main gear 21 meshes with the driven gear 22, causing the driven gear 22 to rotate. The driven gear 22, in turn, meshes with a gear ring 23, causing the gear ring 23 to drive a scraper frame 24 to rotate and scrape the inner wall of the device. The mixture of boiling water and warm water in the temperature control chamber 32 is then discharged into the insulation chamber 31 to keep the stirring chamber 11 warm. At the same time, the gas flow is controlled by the one-way valve 43. The gas discharged from the one-way valve 43 is neutralized by the neutralizing liquid in the neutralization chamber 41 and then discharged to release pressure. After the reaction is completed, the material is separated into solid and liquid by the filter screw 52. The liquid is discharged through the drain chamber 51. The solid is discharged by turning on the motor 54 to drive the spiral blade shaft 53 to rotate.

[0030] The motor 13 and motor 54 of this utility model are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0031] The main function achieved by this utility model is: in the production process of 3,4-difluorobenzonitrile, by setting up a scraping mechanism and a discharge mechanism, the material adhering to the inner wall can be scraped off, thereby improving the material discharge rate.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A fluorination reactor for the production of 3,4-difluorobenzonitrile, comprising a stirring mechanism (1); characterized in that, It also includes a scraping mechanism (2), a heat preservation mechanism (3), a pressure relief mechanism (4) and a discharge mechanism (5). The scraping mechanism (2) is installed inside the mixing mechanism (1), the heat preservation mechanism (3) is installed on the mixing mechanism (1), the pressure relief mechanism (4) is installed on the heat preservation mechanism (3), and the discharge mechanism (5) is installed at the lower end of the mixing mechanism (1). The stirring mechanism (1) stirs, the scraping mechanism (2) scrapes, the heat preservation mechanism (3) keeps the material warm, the pressure relief mechanism (4) relieves pressure, and the material discharge mechanism (5) discharges the material. The scraping mechanism (2) includes a main gear (21), a driven gear (22), a gear ring (23), and a scraper frame (24). The main gear (21) is mounted on the stirring shaft (12). The driven gear (22) is rotatably mounted in the stirring chamber (11) and meshes with the main gear (21). The gear ring (23) is rotatably mounted in the stirring chamber (11) and meshes with the driven gear (22). The scraper frame (24) is mounted on the lower end of the gear ring (23). The insulation mechanism (3) includes an insulation chamber (31) and a temperature control chamber (32). The insulation chamber (31) is installed on the mixing chamber (11), and the temperature control chamber (32) is installed on the right end of the insulation chamber (31).

2. The fluorination reactor for producing 3,4-difluorobenzonitrile as described in claim 1, characterized in that, The stirring mechanism (1) includes a stirring chamber (11), a stirring shaft (12) and a motor (13). The stirring shaft (12) is rotatably mounted on the stirring chamber (11), and the input end of the stirring shaft (12) extends to the upper side of the stirring chamber (11). The motor (13) is mounted on the upper end of the stirring chamber (11), and the output end of the motor (13) is connected to the input end of the stirring shaft (12).

3. The fluorination reactor for producing 3,4-difluorobenzonitrile as described in claim 1, characterized in that, The pressure relief mechanism (4) includes a neutralization chamber (41), a gas duct (42), and a one-way valve (43). The neutralization chamber (41) is installed at the left end of the insulation chamber (31). The inlet end of the gas duct (42) extends into the stirring chamber (11), and the outlet end of the gas duct (42) extends into the neutralization chamber (41). The one-way valve (43) is installed on the gas duct (42).

4. The fluorination reactor for producing 3,4-difluorobenzonitrile as described in claim 2, characterized in that, The discharge mechanism (5) includes a discharge chamber (51), a filter auger (52), a spiral blade shaft (53), and a second motor (54). The discharge chamber (51) is installed at the lower end of the mixing chamber (11). The filter auger (52) is installed inside the discharge chamber (51). The spiral blade shaft (53) is rotatably installed inside the filter auger (52), and the input end of the spiral blade shaft (53) extends to the right side of the filter auger (52). The second motor (54) is installed at the right end of the filter auger (52), and the output end of the second motor (54) is connected to the input end of the spiral blade shaft (53).

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