5-acetoacetamidobenzimidazolone reaction device

Abstract

The utility model relates to the technical field of 5-acetoacetamidobenzimidazolone production, and discloses a 5-acetoacetamidobenzimidazolone reaction device, which comprises a reaction kettle, a first stirring rod and a second stirring rod are respectively and rotatably arranged in the reaction kettle, the first stirring rod and the second stirring rod are annular, and the first stirring rod and the second stirring rod are connected with each other through a connecting rod. The first stirring rod and the second stirring rod are arranged in a nested manner, a driving assembly is mounted on the surface of the reaction kettle and drives the first stirring rod and the second stirring rod to rotate, material distribution holes are formed in the surfaces of the first stirring rod and the second stirring rod, meanwhile, the material distribution holes are provided with material supply assemblies, and the material supply assemblies are used for supplying materials to the material distribution holes. In the whole use process, the first stirring rod and the second stirring rod which rotate in opposite directions are used for stirring in the reaction kettle, and compared with each other, more disordered turbulent flow can be formed in the reaction kettle, so that the reaction speed can be effectively increased, and the effect of improving the reaction efficiency is achieved.

Description

Technical Field

[0001] This utility model relates to the field of 5-acetylacetaminobenzimidazole production technology, and more specifically to a 5-acetylacetaminobenzimidazole reaction apparatus. Background Technology

[0002] 5-Acetylacetamidobenzimidazole ketone (AABI) is an important pigment intermediate, mainly used in the synthesis of azo benzimidazole ketone pigments. These pigments are primarily used in the manufacture of high-end automotive paints. During the synthesis process, the design of the reaction apparatus plays a crucial role in improving synthesis efficiency, reducing costs, and minimizing side reactions.

[0003] Previously, our company disclosed a patent for a high-efficiency synthesis reaction device for 5-acetylacetamidobenzimidazolone, patent publication number CN209865995U. It mainly sets annular distribution pipes at the bottom, middle and top of the reactor, plus stirring fins installed at the top, middle and bottom of the stirring rod to improve the reaction efficiency. However, it was found in use that because the stirring rod rotates in a relatively unidirectional direction, it still takes a long time for the internal raw materials to react fully in the actual reaction process. Overall, there is still a lot of room for improvement in reaction efficiency. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a 5-acetylacetaminobenzimidazole ketone reaction apparatus to solve the problem of low reaction efficiency in the prior art for the efficient synthesis of 5-acetylacetaminobenzimidazole ketone.

[0005] This utility model provides the following technical solution: a 5-acetylacetamidobenzimidazolone reaction device, including a reaction vessel, inside which a first stirring rod and a second stirring rod are rotatably arranged. The first stirring rod and the second stirring rod are annular and stacked together. The first stirring rod and the second stirring rod rotate in opposite directions. A driving assembly is installed on the surface of the reaction vessel to drive the first stirring rod and the second stirring rod to rotate. Both the surface of the first stirring rod and the second stirring rod are provided with material distribution holes. The material distribution holes are equipped with a feeding assembly to supply material to the material distribution holes.

[0006] Furthermore, the drive assembly includes a motor, a first drive shaft, a second drive shaft, and a transmission assembly. A mounting base is fixedly installed on the surface of the reactor. The motor is fixedly installed on the surface of the mounting base. The first drive shaft is rotatably installed in the middle of the mounting base, and its bottom end extends into the interior of the reactor and is fixedly connected to the first stirring rod. The second drive shaft rotatably passes through the middle of the first drive shaft, and its bottom end extends into the interior of the reactor and is fixedly connected to the second stirring rod. The transmission assembly is connected between the motor, the first drive shaft, and the second drive shaft, and the motor can drive the first drive shaft and the second drive shaft to rotate through the transmission assembly.

[0007] Furthermore, the transmission assembly includes pulleys, a belt, a first gear, and a second gear. There are two pulleys: one is rotatably mounted in the mounting base and its shaft is coaxially connected to the motor output shaft; the other is fixedly mounted on the surface of the second drive shaft. The two pulleys are driven by the belt. The first gear is fixedly mounted on the surface of the first drive shaft, and the second gear is coaxially connected to the motor output shaft and meshes externally with the first gear.

[0008] Furthermore, the feeding assembly includes a first feeding pipe and a second feeding pipe. Both the first stirring rod and the second stirring rod are hollow tube structures. The first feeding pipe is machined in the middle of the tube wall of the first drive shaft and is connected to the first stirring rod in the middle. The second feeding pipe is opened in the middle of the second drive shaft and is connected to the second stirring rod.

[0009] Furthermore, the feeding assembly also includes a feeding ring and a connecting pipe. The feeding ring is fixedly installed in the middle of the mounting base, and the first drive shaft rotatably passes through the middle of the feeding ring. The feeding ring has a hollow structure and a through groove is opened on the inner ring surface. The surface of the first drive shaft that contacts the inner ring surface of the feeding ring has a through hole, and the through hole communicates with the through groove. A feeding pipe is installed on the surface of the feeding ring. The connecting pipe is fixedly installed in the middle of the mounting base, and the second drive shaft is rotatably installed in the connecting pipe. At the same time, the top end of the second drive shaft communicates with the connecting pipe.

[0010] Furthermore, there are several fabric holes, which are evenly distributed on the surfaces of the first and second stirring rods.

[0011] Furthermore, a feed pipe and a discharge pipe are installed on the surface of the reactor, with a valve installed in the middle of the discharge pipe, and the discharge pipe is connected to the bottom of the reactor in the middle.

[0012] Furthermore, the second stirring rod is smaller than the first stirring rod, and the first stirring rod is sleeved outside the second stirring rod.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. In this invention, the reaction vessel is stirred by a first stirring rod and a second stirring rod that rotate in opposite directions during the entire process. Compared with the first stirring rod, the second stirring rod can form a more turbulent flow in the reaction vessel, thereby effectively accelerating the reaction speed and improving the reaction efficiency.

[0015] 2. In this invention, the distribution of reactants during the entire reaction process is achieved through a feeding assembly and distribution holes, which are respectively opened on the first and second stirring rods. In this way, there is no need to set up a separate distribution pipeline inside the reactor, thereby ensuring the smoothness of the inner wall of the reactor, reducing dead corners for hygiene and turbulence, and facilitating cleaning while ensuring reaction quality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 This is a first-view schematic diagram of the internal structure of this utility model;

[0018] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 For this utility model Figure 3 Enlarged view of point B in the middle;

[0020] Figure 5 This is a second-view schematic diagram of the internal structure of this utility model;

[0021] Figure 6 For this utility model Figure 5 Enlarged view of point C in the middle;

[0022] Figure 7 This is a schematic diagram of the split structure of this utility model.

[0023] The attached figures are labeled as follows: 1. Reactor; 2. First stirring rod; 3. Second stirring rod; 4. Material distribution hole; 5. Motor; 6. First drive shaft; 7. Second drive shaft; 8. Mounting base; 9. Pulley; 10. Belt; 11. First gear; 12. Second gear; 13. First conveying pipeline; 14. Second conveying pipeline; 17. Conveying ring; 18. Connecting pipe; 19. Through groove; 20. Through hole; 21. Feeding pipe; 22. Inlet pipe; 23. Outlet pipe. Detailed Implementation

[0024] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0025] Figures 1-7 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-7 The present invention will be further described below.

[0026] A 5-acetylacetamidobenzimidazolone reaction apparatus includes a reaction vessel 1. A feed pipe 22 and a discharge pipe 23 are respectively installed on the surface of the reaction vessel 1. A valve is installed in the middle of the discharge pipe 23, and the discharge pipe 23 is connected to the bottom of the reaction vessel 1. A first stirring rod 2 and a second stirring rod 3 are rotatably arranged inside the reaction vessel 1. The first stirring rod 2 and the second stirring rod 3 are annular and overlapped. The first stirring rod 2 and the second stirring rod 3 rotate in opposite directions. The size of the second stirring rod 3 is smaller than that of the first stirring rod 2, and the first stirring rod 2 is fitted outside the second stirring rod 3 to ensure stable operation. A drive assembly is installed on the surface of the reaction vessel 1 to drive the first stirring rod 2 and the second stirring rod 3 to rotate. Both the first stirring rod 2 and the second stirring rod 3 have material distribution holes 4 on their surfaces, and the material distribution holes 4 are equipped with a feeding assembly to supply material to the material distribution holes 4.

[0027] The drive assembly includes a motor 5, a first drive shaft 6, a second drive shaft 7, and a transmission assembly. A mounting base 8 is fixedly installed on the surface of the reactor 1. The motor 5 is fixedly installed on the surface of the mounting base 8. The first drive shaft 6 is rotatably installed in the middle of the mounting base 8, and its bottom end extends into the interior of the reactor 1 and is fixedly connected to the first stirring rod 2. The second drive shaft 7 is rotatably inserted through the middle of the first drive shaft 6, and its bottom end extends into the interior of the reactor 1 and is fixedly connected to the second stirring rod 3. The transmission assembly is connected between the motor 5, the first drive shaft 6, and the second drive shaft 7, and the motor 5 can drive the first drive shaft 6 and the second drive shaft 7 to rotate through the transmission assembly.

[0028] Thus, by simply starting motor 5, motor 5 will drive the first drive shaft 6 and the second drive shaft 7 to rotate through the transmission assembly, thereby driving the first stirring rod 2 and the second stirring rod 3 to rotate. Furthermore, the first stirring rod 2 and the second stirring rod 3 rotate in opposite directions, which can create more turbulent flow in the reactor 1 to improve reaction efficiency.

[0029] The transmission assembly includes pulleys 9, a belt 10, a first gear 11, and a second gear 12. There are two pulleys 9: one is rotatably mounted in the mounting base 8, and its shaft is coaxially connected to the output shaft of the motor 5; the other is fixedly mounted on the surface of the second drive shaft 7. The two pulleys 9 are driven by the belt 10. The first gear 11 is fixedly mounted on the surface of the first drive shaft 6, and the second gear 12 is coaxially connected to the output shaft of the motor 5. The second gear 12 is externally meshed with the first gear 11. Thus, the motor 5 can drive the first drive shaft 6 to rotate through the first gear 11 and the second gear 12, thereby driving the first stirring rod 2 to rotate. At the same time, the rotation of the motor 5 will also synchronously drive the second drive shaft 7 to rotate through the pulleys 9 and the belt 10, thereby driving the second stirring rod 3 to rotate. During this process, since the first gear 11 and the second gear 12 are externally meshed, the rotation direction of the first drive shaft 6 is opposite to the rotation direction of the motor 5 shaft. Since the second drive shaft 7 is driven by the pulleys 9 and the belt 10, its rotation direction is the same as that of the motor 5 shaft. Thus, the rotation directions of the first stirring rod 2 and the second stirring rod 3 will be opposite.

[0030] The feeding assembly includes a first feeding pipe 13 and a second feeding pipe 14. Both the first stirring rod 2 and the second stirring rod 3 are hollow tubes. The first feeding pipe 13 is machined in the middle of the wall of the first drive shaft 6 and is connected to the first stirring rod 2. The second feeding pipe 14 is located in the middle of the second drive shaft 7 and is connected to the second stirring rod 3. The feeding assembly also includes a feeding ring 17 and a connecting pipe 18. The feeding ring 17 is fixedly installed on the mounting base. In the middle of the mounting base 8, the first drive shaft 6 is rotatably inserted through the middle of the conveying ring 17. The conveying ring 17 is a hollow structure, and a through groove 19 is opened on the inner ring surface. A through hole 20 is opened on the surface of the first drive shaft 6 that contacts the inner ring surface of the conveying ring 17, and the through hole 20 is connected to the through groove 19. A feeding pipe 21 is installed on the surface of the conveying ring 17. The connecting pipe 18 is fixedly installed in the middle of the mounting base 8, and the second drive shaft 7 is rotatably installed in the connecting pipe 18. At the same time, the top end of the second drive shaft 7 is connected to the connecting pipe 18.

[0031] In this way, the reactants to be added are simply fed into the feed pipe 21 and the connecting pipe 18 respectively. Then, the reactants will enter the first stirring rod 2 and the second stirring rod 3 from the through groove 19, through hole 20, first feed pipe 13 and second feed pipe 14 respectively, and finally flow out from the distribution hole 4. There are several distribution holes 4, which are evenly distributed on the surface of the first stirring rod 2 and the second stirring rod 3. In this way, the reactants will be automatically distributed in the upper, middle and lower three layers of the reaction vessel 1. At this time, when the reactants encounter the turbulence in the reaction vessel 1, they will be quickly dispersed in the reaction vessel 1 to react, thereby achieving a high-efficiency reaction.

[0032] Therefore, the complete operating procedure is as follows: First, raw materials are added to the reactor 1 through the feed pipe 22. Then, the motor 5 is started. The motor 5 will drive the first drive shaft 6 to rotate through the first gear 11 and the second gear 12, thereby driving the first stirring rod 2 to rotate. At the same time, the rotation of the motor 5 will also drive the second drive shaft 7 to rotate synchronously through the pulley 9 and the belt 10, thereby driving the second stirring rod 3 to rotate. During this process, since the first gear 11 and the second gear 12 are externally meshed, the rotation direction of the first drive shaft 6 is opposite to the rotation direction of the motor 5 shaft. However, since the second drive shaft 7 is driven by the pulley 9 and the belt 10, its rotation direction is the same as that of the motor 5 shaft. Thus, the first stirring rod 2 and the second stirring rod 3 rotate in opposite directions. The direction of the stirring rod 3 will be reversed, thus creating a more turbulent flow inside the reactor 1. At this time, the reactants to be added can be fed into the reactor through the feed pipe 21 and the connecting pipe 18 respectively. Then, the reactants will enter the first stirring rod 2 and the second stirring rod 3 through the through channel 19, through hole 20, first feed pipe 13 and second feed pipe 14 respectively, and finally flow out from the distribution hole 4. Since the distribution hole 4 is evenly distributed on the surface of the first stirring rod 2 and the second stirring rod 3, the reactants will be automatically distributed in the upper, middle and lower layers of the reactor 1. At this time, when the reactants encounter the turbulence inside the reactor 1, they will be quickly dispersed in the reactor 1 to react, thereby achieving a high-efficiency reaction.

[0033] In summary, during the entire process, the reaction vessel 1 is stirred by the first stirring rod 2 and the second stirring rod 3 rotating in opposite directions. Compared with the first stirring rod 2, the second stirring rod 3 can form a more turbulent flow in the reaction vessel 1, which can effectively accelerate the reaction speed and improve the reaction efficiency.

[0034] Meanwhile, throughout the reaction process, the distribution of reactants is achieved through the feeding assembly and the distribution holes 4, which are respectively opened on the first stirring rod 2 and the second stirring rod 3. In this way, there is no need to set up a separate distribution pipeline inside the reactor 1, thereby ensuring the smoothness of the inner wall of the reactor 1, reducing dead corners for hygiene and turbulence, and facilitating cleaning while ensuring reaction quality.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

A 1,5-acetylacetamidobenzimidazolone reaction apparatus, comprising a reaction vessel (1), characterized in that: The reactor (1) is equipped with a first stirring rod (2) and a second stirring rod (3) that rotate inside. The first stirring rod (2) and the second stirring rod (3) are in a ring shape and are stacked together. The first stirring rod (2) and the second stirring rod (3) rotate in opposite directions. A drive assembly is installed on the surface of the reactor (1) to drive the first stirring rod (2) and the second stirring rod (3) to rotate. The surfaces of the first stirring rod (2) and the second stirring rod (3) are provided with material feeding holes (4). The material feeding holes (4) are equipped with a feeding assembly to feed material into the material feeding holes (4).

2. The 5-acetylacetamidobenzimidazolone reaction apparatus according to claim 1, characterized in that: The drive assembly includes a motor (5), a first drive shaft (6), a second drive shaft (7), and a transmission assembly. A mounting base (8) is fixedly installed on the surface of the reactor (1). The motor (5) is fixedly installed on the surface of the mounting base (8). The first drive shaft (6) is rotatably installed in the middle of the mounting base (8) and its bottom end extends into the reactor (1) and is fixedly connected to the first stirring rod (2). The second drive shaft (7) is rotatably inserted through the middle of the first drive shaft (6) and its bottom end extends into the reactor (1) and is fixedly connected to the second stirring rod (3). The transmission assembly is connected between the motor (5), the first drive shaft (6), and the second drive shaft (7). The motor (5) can drive the first drive shaft (6) and the second drive shaft (7) to rotate through the transmission assembly.

3. The 5-acetylacetamidobenzimidazolone reaction apparatus according to claim 2, characterized in that: The transmission assembly includes pulleys (9), belts (10), a first gear (11), and a second gear (12). There are two pulleys (9), one of which is rotatably mounted in the mounting base (8) and its shaft is coaxially connected to the output shaft of the motor (5). The other is fixedly mounted on the surface of the second drive shaft (7). The two pulleys (9) are driven by the belt (10). The first gear (11) is fixedly mounted on the surface of the first drive shaft (6). The second gear (12) is coaxially connected to the output shaft of the motor (5) and the second gear (12) meshes externally with the first gear (11).

4. The 5-acetylacetamidobenzimidazolone reaction apparatus according to claim 2, characterized in that: The feeding assembly includes a first feeding pipe (13) and a second feeding pipe (14). The first stirring rod (2) and the second stirring rod (3) are both hollow tube structures. The first feeding pipe (13) is processed in the middle of the tube wall of the first drive shaft (6) and is connected to the first stirring rod (2). The second feeding pipe (14) is opened in the middle of the second drive shaft (7) and is connected to the second stirring rod (3).

5. The 5-acetylacetamidobenzimidazolone reaction apparatus according to claim 4, characterized in that: The feeding assembly also includes a feeding ring (17) and a connecting pipe (18). The feeding ring (17) is fixedly installed in the middle of the mounting base (8), and the first drive shaft (6) is rotatably inserted through the middle of the feeding ring (17). The feeding ring (17) is a hollow structure, and a through groove (19) is opened on the inner ring surface. A through hole (20) is opened on the surface of the first drive shaft (6) that contacts the inner ring surface of the feeding ring (17), and the through hole (20) is connected to the through groove (19). A feeding pipe (21) is installed on the surface of the feeding ring (17). The connecting pipe (18) is fixedly installed in the middle of the mounting base (8), and the second drive shaft (7) is rotatably installed in the connecting pipe (18). At the same time, the top end of the second drive shaft (7) is connected to the connecting pipe (18).

6. The 5-acetylacetamidobenzimidazolone reaction apparatus according to claim 1, characterized in that: There are several fabric holes (4), which are evenly distributed on the surfaces of the first stirring rod (2) and the second stirring rod (3).

7. The 5-acetylacetamidobenzimidazolone reaction apparatus according to claim 1, characterized in that: The surface of the reactor (1) is respectively equipped with a feed pipe (22) and a discharge pipe (23). A valve is installed in the middle of the discharge pipe (23), and the discharge pipe (23) is connected to the bottom of the reactor (1).

8. The 5-acetylacetamidobenzimidazolone reaction apparatus according to claim 1, characterized in that: The second stirring rod (3) is smaller than the first stirring rod (2), and the first stirring rod (2) is sleeved outside the second stirring rod (3).

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