Temperature-controllable reaction kettle for synthesizing 2-chloronicotinic acid

Abstract

The utility model relates to the technical field of 2-chloronicotinic acid synthesis, and discloses a temperature-controllable reaction kettle for 2-chloronicotinic acid synthesis, which comprises a base, a water tank and a reaction kettle, the water tank is fixed on the right side of the top of the base, the reaction kettle is fixed on the left side of the top of the base, and the reaction kettle is formed by an outer protective layer and an inner layer. A heating cavity is formed between the outer protective layer and the inner layer; a main controller is fixedly connected to the right side of the water tank, a water injection pipe is arranged at the top of the water tank, an electric heating pipe is arranged in the water tank, a circulating pump is fixedly connected to the top of the base, a water pumping pipe is fixedly connected to the right side of the circulating pump, and a water inlet pipe is fixedly connected to the left side of the circulating pump; the top of the reaction kettle is fixedly connected with a circulating pipe, and a temperature sensor is arranged at the inner top of the reaction kettle inner layer. According to the temperature-controllable reaction kettle for synthesis of 2-chloronicotinic acid, the temperature in the reaction kettle is monitored in real time, and data is transmitted to the master controller, so that accurate control on the temperature is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of 2-chloronicotinic acid synthesis, in particular to a temperature-controllable reaction kettle for 2-chloronicotinic acid synthesis. Background Art

[0002] 2-Chloronicotinic acid is widely used in the fields of medicine and pesticides. As a pharmaceutical intermediate, it can be used to manufacture drugs such as the HIV reverse transcriptase inhibitor nevirapine, the antidepressant drug mirtazapine, and the highly effective anti-inflammatory analgesic drug niflumic acid. In terms of pesticides, it is an important raw material for the synthesis of herbicides such as nicosulfuron and diflufenicol.

[0003] Chinese patent authorization announcement number CN 218131829 U discloses a 2-chloronicotinic acid synthesis reactor, including a base, a fixing groove is provided at the center of the top of the base, the top of the base is fixedly connected with a reactor body, the bottom of the inner cavity of the fixing groove is fixedly connected with a motor, and the output end of the motor penetrates the inner cavity of the reactor body and is connected with a rotating column. The utility model is used to support the reactor body by setting a base, and the reactor body is used to provide a reaction space for raw materials by setting a fixing groove, which plays a role of fixing the motor, avoiding the position displacement of the motor when in use, and the motor is used to drive the rotating column to rotate by setting a rotating column, which plays a role of driving the stirring rod to rotate, and solves the problem that the existing 2-chloronicotinic acid reactor is usually cleaned manually after use, which not only slows the cleaning speed, but also increases the labor intensity of the staff, and is time-consuming and laborious.

[0004] However, the above-mentioned prior art cannot control the temperature inside the reactor, thereby reducing the production effect of the materials inside the reactor and reducing the use effect of the reactor. Therefore, a temperature-controllable reactor for synthesizing 2-chloronicotinic acid is urgently needed. Utility Model Content

[0005] The utility model aims to provide a temperature-controllable reaction kettle for synthesizing 2-chloronicotinic acid to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a temperature-controllable reactor for 2-chloronicotinic acid synthesis, comprising a base, a water tank, and a reactor, wherein the water tank is fixed on the right side of the top of the base, and the reactor is fixed on the left side of the top of the base, and the reactor is formed by an outer protective layer and an inner layer, and a heating chamber is formed between the outer protective layer and the inner layer;

[0007] The right side of the water tank is fixedly connected to a main controller, the top of the water tank is provided with a water injection pipe, the interior of the water tank is provided with an electric heating pipe, the top of the base is fixedly connected to a circulating pump, the right side of the circulating pump is fixedly connected to a water suction pipe, the left side of the circulating pump is fixedly connected to a water inlet pipe, the top of the reactor is fixedly connected to a circulating pipe, and the inner top of the inner layer of the reactor is provided with a temperature sensor.

[0008] Preferably, a feed pipe communicating with the inner layer is arranged at the top of the reactor, a sealing cover is arranged on the feed pipe, and a discharge pipe communicating with the inner layer is arranged at the bottom of the reactor, a valve is arranged on the discharge pipe.

[0009] The reactants can be conveniently added to the reactor through the feed pipe at the top, and the products can be conveniently discharged through the discharge pipe at the bottom after the reaction is completed.

[0010] Preferably, one end of the water extraction pipe away from the circulation pump is connected to the water tank, and one end of the water inlet pipe away from the circulation pump penetrates into the heating chamber.

[0011] Preferably, one end of the circulation pipe penetrates into the heating chamber, and one end of the circulation pipe away from the reactor is connected to the water tank.

[0012] The water in the water tank is heated by an electric heating pipe, and the circulating pump then sends the hot water into the heating chamber through the suction pipe and the water inlet pipe, thereby heating the reactor. At the same time, after the hot water fills the heating chamber, it is guided back to the water tank through the circulation pipe for heating. The temperature sensor can monitor the temperature inside the reactor in real time and transmit the data to the main controller, thereby achieving precise control of the temperature.

[0013] Preferably, the electric heating tube is electrically connected to the main controller, the circulating pump is electrically connected to the main controller, and the temperature sensor is electrically connected to the main controller.

[0014] Preferably, a motor is fixedly connected to the top of the reactor, the motor is electrically connected to the main controller, a driving shaft is fixedly connected to the output end of the motor, the bottom of the driving shaft movably penetrates into the inner layer of the reactor and is fixedly connected to a main stirring rod, and a main gear is fixedly connected to the surface of the driving shaft.

[0015] The motor drives the driving shaft to rotate, thereby driving the main stirring rod to stir, and the auxiliary driving shaft and the auxiliary stirring rod can also rotate and stir under the drive of the main gear and the auxiliary gear, thereby achieving sufficient mixing and reaction of the reactants.

[0016] Preferably, the inner bottom wall of the inner layer of the reactor is movably connected to two auxiliary shafts, the surfaces of the two auxiliary shafts are fixedly connected to auxiliary stirring rods, the surfaces of the two auxiliary shafts are respectively fixedly connected to auxiliary gears, and the auxiliary gears are respectively meshed with the main gears.

[0017] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0018] First, the utility model can conveniently add reactants into the reactor through the feed pipe at the top. After the reaction is completed, the product can be conveniently discharged through the discharge pipe at the bottom. The water in the water tank is heated by the electric heating pipe, and the circulating pump then sends the hot water into the heating chamber through the pumping pipe and the water inlet pipe, so as to achieve the heating of the reactor. At the same time, after the heating chamber is filled with hot water, it is heated in the water tank through the circulation pipe. The temperature sensor can monitor the temperature inside the reactor in real time and transmit the data to the main controller, so as to achieve precise control of the temperature.

[0019] Second, the utility model drives the driving shaft to rotate through the motor, thereby driving the main stirring rod to stir, and the auxiliary driving shaft and the auxiliary stirring rod can also rotate and stir under the drive of the main gear and the auxiliary gear, thereby achieving sufficient mixing and reaction of the reactants. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the cutaway and front view structure of the water tank of the utility model;

[0022] Figure 3 This is a schematic diagram of the cutaway and front view structure of the reactor of the utility model;

[0023] Figure 4 It is a schematic diagram of the cutaway and three-dimensional structure of the reactor of the utility model.

[0024] Among them: 1. Base; 2. Water tank; 3. Reactor; 4. Master controller; 5. Electric heating tube; 6. Circulation pump; 7. Suction pipe; 8. Water inlet pipe; 9. Circulation pipe; 10. Temperature sensor; 11. Feed pipe; 12. Discharge pipe; 13. Motor; 14. Driving shaft; 15. Main stirring rod; 16. Main gear; 17. Auxiliary drive shaft; 18. Auxiliary stirring rod; 19. Auxiliary gear. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides the following technical solutions:

[0027] Embodiment 1

[0028] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 A temperature-controlled reactor for synthesizing 2-chloronicotinic acid comprises a base 1, a water tank 2, and a reactor 3. The water tank 2 is fixed on the right side of the top of the base 1, and the reactor 3 is fixed on the left side of the top of the base 1. The reactor 3 is formed by an outer protective layer and an inner layer, and a heating chamber is formed between the outer protective layer and the inner layer.

[0029] A main controller 4 is fixedly connected to the right side of the water tank 2, a water injection pipe is arranged on the top of the water tank 2, an electric heating pipe 5 is arranged inside the water tank 2, a circulating pump 6 is fixedly connected to the top of the base 1, a water extraction pipe 7 is fixedly connected to the right side of the circulating pump 6, a water inlet pipe 8 is fixedly connected to the left side of the circulating pump 6, a circulating pipe 9 is fixedly connected to the top of the reactor 3, and a temperature sensor 10 is arranged on the inner top of the inner layer of the reactor 3.

[0030] A feed pipe 11 communicating with the inner layer is arranged at the top of the reactor 3, and a sealing cover is arranged on the feed pipe 11. A discharge pipe 12 communicating with the inner layer is arranged at the bottom of the reactor 3, and a valve is arranged on the discharge pipe 12.

[0031] One end of the water extraction pipe 7 away from the circulation pump 6 is communicated with the water tank 2, and one end of the water inlet pipe 8 away from the circulation pump 6 penetrates into the heating chamber.

[0032] One end of the circulation pipe 9 penetrates into the heating chamber, and one end of the circulation pipe 9 away from the reaction kettle 3 is connected to the water tank 2 .

[0033] The electric heating tube 5 is electrically connected to the main controller 4 , the circulating pump 6 is electrically connected to the main controller 4 , and the temperature sensor 10 is electrically connected to the main controller 4 .

[0034] Through the above technical scheme, the reactants can be conveniently added to the reactor 3 through the feed pipe 11 on the top. After the reaction is completed, the products can be conveniently discharged through the discharge pipe 12 at the bottom. The water in the water tank 2 is heated by the electric heating pipe 5, and the circulating pump 6 then sends the hot water into the heating chamber through the pumping pipe 7 and the water inlet pipe 8, so as to achieve the heating of the reactor 3. At the same time, after the hot water fills the heating chamber, it is heated in the water tank 2 through the circulation pipe 9. The temperature sensor 10 can monitor the temperature inside the reactor 3 in real time and transmit the data to the main controller 4, so as to achieve precise control of the temperature.

[0035] Embodiment 2

[0036] See also Figure 4 On the basis of Example 1, it is further obtained that: a motor 13 is fixedly connected to the top of the reactor 3, the motor 13 is electrically connected to the main controller 4, a driving shaft 14 is fixedly connected to the output end of the motor 13, the bottom of the driving shaft 14 movably penetrates into the inner layer of the reactor 3 and is fixedly connected to a main stirring rod 15, and a main gear 16 is fixedly connected to the surface of the driving shaft 14.

[0037] The inner bottom wall of the inner layer of the reactor 3 is movably connected to two auxiliary shafts 17, the surfaces of the two auxiliary shafts 17 are fixedly connected to auxiliary stirring rods 18, and the surfaces of the two auxiliary shafts 17 are respectively fixedly connected to auxiliary gears 19, which are respectively meshed with the main gears 16.

[0038] Through the above technical solution, the motor 13 drives the driving shaft 14 to rotate, thereby driving the main stirring rod 15 to stir, and the auxiliary driving shaft 17 and the auxiliary stirring rod 18 can also rotate and stir under the drive of the main gear 16 and the auxiliary gear 19, thereby achieving sufficient mixing and reaction of the reactants.

[0039] In actual operation, when this device is in use, reactants can be conveniently added to the reactor 3 through the feed pipe 11 on the top. After the reaction is completed, the product can be conveniently discharged through the discharge pipe 12 at the bottom. The water in the water tank 2 is heated by the electric heating pipe 5, and the circulating pump 6 then sends the hot water into the heating chamber through the pumping pipe 7 and the water inlet pipe 8, thereby heating the reactor 3. At the same time, after the hot water fills the heating chamber, it is heated in the return water tank 2 through the circulation pipe 9. The temperature sensor 10 can monitor the temperature inside the reactor 3 in real time and transmit the data to the main controller 4, thereby realizing precise control of the temperature. The driving shaft 14 is driven to rotate by the motor 13, thereby driving the main stirring rod 15 to stir, and the auxiliary driving shaft 17 and the auxiliary stirring rod 18 can also rotate and stir under the drive of the main gear 16 and the auxiliary gear 19, thereby realizing sufficient mixing and reaction of the reactants.

[0040] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A temperature-controllable reactor for synthesizing 2-chloronicotinic acid, comprising a base (1), a water tank (2), and a reactor (3), characterized in that: The water tank (2) is fixed on the right side of the top of the base (1), and the reaction kettle (3) is fixed on the left side of the top of the base (1); the reaction kettle (3) is formed by an outer protective layer and an inner layer, and a heating chamber is formed between the outer protective layer and the inner layer; The right side of the water tank (2) is fixedly connected to a master controller (4), the top of the water tank (2) is provided with a water injection pipe, the interior of the water tank (2) is provided with an electric heating pipe (5), the top of the base (1) is fixedly connected to a circulation pump (6), the right side of the circulation pump (6) is fixedly connected to a water extraction pipe (7), the left side of the circulation pump (6) is fixedly connected to a water inlet pipe (8), the top of the reactor (3) is fixedly connected to a circulation pipe (9), and the inner top of the inner layer of the reactor (3) is provided with a temperature sensor (10).

2. A temperature-controllable reaction kettle for synthesizing 2-chloronicotinic acid according to claim 1, characterized in that: The top of the reaction kettle (3) is provided with a feed pipe (11) connected to the inner layer, and a sealing cover is provided on the feed pipe (11). The bottom of the reaction kettle (3) is provided with a discharge pipe (12) connected to the inner layer, and a valve is provided on the discharge pipe (12).

3. A temperature-controllable reaction kettle for synthesizing 2-chloronicotinic acid according to claim 1, characterized in that: One end of the water extraction pipe (7) away from the circulation pump (6) is in communication with the water tank (2), and one end of the water inlet pipe (8) away from the circulation pump (6) penetrates into the heating chamber.

4. A temperature-controllable reaction kettle for synthesizing 2-chloronicotinic acid according to claim 1, characterized in that: One end of the circulation pipe (9) penetrates into the heating chamber, and the end of the circulation pipe (9) away from the reaction kettle (3) is connected to the water tank (2).

5. A temperature-controllable reaction kettle for synthesizing 2-chloronicotinic acid according to claim 1, characterized in that: The electric heating tube (5) is electrically connected to the main controller (4), the circulating pump (6) is electrically connected to the main controller (4), and the temperature sensor (10) is electrically connected to the main controller (4).

6. A temperature-controllable reaction kettle for synthesizing 2-chloronicotinic acid according to claim 1, characterized in that: The top of the reactor (3) is fixedly connected to a motor (13), the motor (13) is electrically connected to a master controller (4), the output end of the motor (13) is fixedly connected to a driving shaft (14), the bottom of the driving shaft (14) movably penetrates into the inner layer of the reactor (3) and is fixedly connected to a main stirring rod (15), and the surface of the driving shaft (14) is fixedly connected to a main gear (16).

7. A temperature-controllable reaction kettle for synthesizing 2-chloronicotinic acid according to claim 6, characterized in that: The inner bottom wall of the inner layer of the reaction kettle (3) is movably connected to two auxiliary shafts (17), the surfaces of the two auxiliary shafts (17) are fixedly connected to auxiliary stirring rods (18), and the surfaces of the two auxiliary shafts (17) are respectively fixedly connected to auxiliary gears (19), and the auxiliary gears (19) are respectively meshed with the main gears (16).

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