Synthetic reaction kettle

Abstract

The utility model discloses a synthetic reaction kettle, which belongs to the technical field of chemical equipment and comprises a tank body. A stirring assembly is further included, the stirring assembly comprises a stirring rod, the stirring rod is arranged in the tank body, the stirring rod is fixedly connected with the bottom of a rotating shaft, and the top of the rotating shaft is rotationally matched with the tank body; the device further comprises a filtering assembly, the filtering assembly comprises a first communicating pipe and a solution tank for storing an organic solution, one end of the first communicating pipe is communicated to the upper portion of the interior of the tank body, and the other end of the first communicating pipe is communicated to the lower portion of the interior of the solution tank; the solution box and the vacuum pump are used in cooperation, the structure is simple, convenience and practicability are achieved, air in the tank body can be pumped into the solution box to be filtered, chlorine in the air can be filtered twice by arranging the first solution chamber and the second solution chamber in the solution box, and the filtering effect is improved; the harm of chlorine to the body health of operators is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a synthesis reaction kettle. Background Art

[0002] 2-Chloronicotinic acid, also known as 2-chloro-3-pyridinecarboxylic acid and 2-chloro-3-pyridinecarboxylic acid, is an important pesticide and pharmaceutical intermediate. It appears as an off-white to brown powder that is insoluble in cold water, slightly soluble in hot water, and readily soluble in hot methanol and ethanol, with a melting point of 176-178°C. It should be stored in a sealed container in a cool, ventilated place, away from sources of fire, oxidants, acids, and bases. Avoid contact with skin and eyes. In case of contact, rinse immediately with plenty of water. 2-Chloronicotinic acid has a wide range of applications, primarily in the production of pesticides such as the new, highly effective herbicide nicosulfuron and the amide herbicide diflufenican, as well as pharmaceuticals such as the HIV reverse transcriptase inhibitor nevirapine, the antidepressant mirtazapine, and the highly effective anti-inflammatory analgesic niflumic acid. A reactor is required for the production of 2-chloronicotinic acid.

[0003] A search revealed prior art Chinese patent publication number CN220559226U, which discloses a synthesis reactor. This utility model comprises a reactor body, the top of which is connected to a feed pipe, the bottom of which is connected to a discharge pipe, and a stirring assembly disposed within the reactor body. The stirring assembly comprises a first stirring mechanism and a second stirring mechanism, the first stirring mechanism being disposed within the reactor body via a lifting assembly, and the second stirring mechanism being provided with a spray nozzle. The first and second stirring mechanisms cooperate to fully mix the raw materials, effectively increasing the reaction rate. The second stirring mechanism and the spray nozzle facilitate cleaning of the reactor body.

[0004] However, the device also has the following defects:

[0005] During the production of 2-chloronicotinic acid, chlorine gas needs to be introduced into a mixture of phosphorus oxychloride and phosphorus trichloride, with the temperature controlled at around 60°C, until any remaining chlorine escapes. Chlorine is a highly toxic gas with a strong, pungent odor. A small amount of overflowing chlorine gas may leak from the reactor, endangering the health of operators. This device does not address this problem. Utility Model Content

[0006] The purpose of the utility model is to provide a synthesis reactor. By arranging a solution tank and a vacuum pump for use, the air in the tank body can be drawn into the solution tank for filtration. By arranging a first solution chamber and a second solution chamber in the solution tank, the air can be filtered twice, thereby improving the filtration effect and preventing chlorine from causing harm to the health of operators, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] A synthesis reactor, comprising a tank body;

[0009] The tank further comprises a stirring assembly, wherein the stirring assembly comprises a stirring rod, the stirring rod is disposed inside the tank body, the stirring rod is fixedly connected to the bottom of the rotating shaft, and the top of the rotating shaft is rotatably matched with the tank body;

[0010] It also includes a filter assembly, which includes a first connecting pipe and a solution tank for storing an organic solution, one end of the first connecting pipe is connected to the upper interior of the tank body, and the other end of the first connecting pipe is connected to the lower interior of the solution tank, a vacuum pump is fixedly installed on one side of the top surface of the solution tank, and the air inlet end of the vacuum pump is connected to the upper interior of the solution tank through a second connecting pipe, and a check valve is fixedly installed on one side of the top surface of the tank body.

[0011] Preferably, a feeding port is fixedly installed on one side of the top of the tank body, a sealing cover is threadedly connected to the top of the feeding port, and a discharge port is integrally formed at the bottom of the tank body, and a first valve is installed on the discharge port.

[0012] Preferably, the top of the rotating shaft is in driving engagement with the output end of the motor, and the motor is fixedly mounted at the center of the top surface of the tank body.

[0013] Preferably, a gas pipe for conveying chlorine is fixedly installed on the other side of the top of the tank body, and the bottom of the gas pipe is arranged below the inside of the tank body.

[0014] Preferably, a second valve is installed on the top of the gas pipe, and a pressure gauge is provided on one side of the gas pipe, and the pressure gauge is fixedly installed on the top of the tank body.

[0015] Preferably, a jacket is provided around the outer side of the tank body, the jacket is fixedly connected to the tank body, a medium outlet is fixedly installed above one side of the jacket, and a medium inlet is fixedly installed below the other side of the jacket.

[0016] Preferably, a first solution chamber and a second solution chamber are provided inside the solution box, and a partition plate is provided between the first solution chamber and the second solution chamber.

[0017] Preferably, the partition plate is fixedly connected to the inner wall of the solution tank, and a third connecting pipe is fixedly installed on the partition plate. The top of the third connecting pipe is connected to the upper part of the first solution chamber, and the bottom of the third connecting pipe is connected to the second solution chamber.

[0018] Preferably, a filling port for adding organic solution is provided on the top of the first solution chamber and the second solution chamber, and a discharge pipe for discharging waste liquid is provided below one side of the first solution chamber and the second solution chamber.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The utility model is simple in structure, convenient and practical by arranging a solution box and a vacuum pump for use together. The air in the tank body can be drawn into the solution box for filtration. Moreover, by arranging a first solution chamber and a second solution chamber in the solution box, the chlorine in the air can be filtered twice, thereby improving the filtering effect and preventing the chlorine from causing harm to the health of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the utility model;

[0022] Figure 2 Schematic diagram of the tank cross-section structure;

[0023] Figure 3 Schematic diagram of the cross-sectional structure of the solution tank;

[0024] Figure 4 Schematic diagram of the tank top structure.

[0025] In the figure: 1. tank body; 2. stirring rod; 3. rotating shaft; 4. first connecting pipe; 5. solution tank; 6. vacuum pump; 7. second connecting pipe; 8. check valve; 9. feeding port; 10. sealing cover; 11. discharge port; 12. first valve; 13. motor; 14. gas pipe; 15. second valve; 16. pressure gauge; 17. jacket; 18. medium outlet; 19. medium inlet; 20. first solution chamber; 21. second solution chamber; 22. partition plate; 23. third connecting pipe; 24. filling port; 25. discharge pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] See also Figures 1 to 4 , the utility model provides a technical solution:

[0028] A synthesis reactor comprises a tank body 1, a feeding port 9 being fixedly mounted on one side of the top of the tank body 1, a sealing cover 10 being threadedly connected to the top of the feeding port 9, a discharge port 11 being integrally formed at the bottom of the tank body 1, a first valve 12 being mounted on the discharge port 11, a jacket 17 being mounted around the outer periphery of the tank body 1, the jacket 17 being fixedly connected to the tank body 1, a thermometer being mounted on the top surface of the tank body 1 for facilitating understanding of the temperature of the mixture, a medium outlet 18 being fixedly mounted above one side of the jacket 17, and a medium inlet 19 being fixedly mounted below the other side of the jacket 17, and the provision of the jacket 17 allowing the interior of the tank body 1 to be heated or cooled by adding a medium into the jacket 17.

[0029] It also includes a stirring assembly, which includes a stirring rod 2. The stirring rod 2 is arranged inside the tank body 1, and the stirring rod 2 is fixedly connected to the bottom of the rotating shaft 3. The top of the rotating shaft 3 rotates with the tank body 1, and the top of the rotating shaft 3 is transmission-coordinated with the output end of the motor 13. The motor 13 is fixedly installed at the center of the top surface of the tank body 1. By setting the stirring assembly, the mixed solution can be stirred to accelerate its reaction.

[0030] It also includes a filter assembly, which includes a first connecting pipe 4 and a solution tank 5 for storing an organic solution. One end of the first connecting pipe 4 is connected to the upper part of the interior of the tank body 1, and the other end of the first connecting pipe 4 is connected to the lower part of the interior of the solution tank 5. A vacuum pump 6 is fixedly installed on one side of the top surface of the solution tank 5. The air inlet end of the vacuum pump 6 is connected to the upper part of the interior of the solution tank 5 through a second connecting pipe 7. A check valve 8 is fixedly installed on one side of the top surface of the tank body 1. By setting the check valve 8, outside air can enter the tank body 1 to prevent the air pressure in the tank body 1 from being too low and affecting the normal use of the vacuum pump 6. At the same time, it can prevent the air in the tank body 1 from entering the outside air and causing to pollute the solution tank 5; a first solution chamber 20 and a second solution chamber 21 are provided inside the solution tank 5, a partition plate 22 is provided between the first solution chamber 20 and the second solution chamber 21, the partition plate 22 is fixedly connected to the inner wall of the solution tank 5, a third connecting pipe 23 is fixedly installed on the partition plate 22, the top of the third connecting pipe 23 is connected to the top of the first solution chamber 20, and the bottom of the third connecting pipe 23 is connected to the second solution chamber 21, a filling port 24 for adding organic solution is provided at the top of the first solution chamber 20 and the second solution chamber 21, and a discharge pipe 25 for discharging waste liquid is provided at the bottom of one side of the first solution chamber 20 and the second solution chamber 21.

[0031] A gas pipe 14 for conveying chlorine is fixedly installed on the other side of the top of the tank body 1, and the bottom of the gas pipe 14 is arranged below the inside of the tank body 1. By arranging the bottom of the gas pipe 14 below the inside of the tank body 1, it is convenient for chlorine to contact with the mixed solution; a second valve 15 is installed on the top of the gas pipe 14, and a pressure gauge 16 is arranged on one side of the gas pipe 14. The pressure gauge 16 is fixedly installed on the top of the tank body 1. By arranging the pressure gauge 16, the operator can intuitively understand the air pressure of the tank body 1, thereby judging whether chlorine has escaped.

[0032] When in use, the device is moved to a designated position, the sealing cover 10 is opened, and the mixture of phosphorus oxychloride and phosphorus trichloride is added to the interior of the tank body 1 through the feeding port 9. The top side of the gas pipe 14 is connected to the external chlorine storage device, the second valve 15 is opened, and chlorine is introduced into the mixed solution. The pressure gauge 16 is observed. When the index of the pressure gauge 16 becomes larger, it can be judged that the air pressure above the interior of the tank body 1 becomes larger. At this time, chlorine escapes. The second valve 15 is closed, and nicotinic acid N-oxide is added to the tank body 1 in batches. The heated medium is connected to the external medium through the medium inlet 19, and the heat medium is added to the jacket 17 to heat the mixed solution. The temperature of the mixed solution in the tank is observed by the thermometer on the top of the tank body 1. After the reaction mixture becomes transparent, the motor 13 is started. The output end of the motor 13 drives the rotating shaft 3 and the stirring rod 2 to rotate. The rotating stirring rod 2. The mixed solution is stirred to allow it to fully react, and the vacuum pump 6 is started. The air inlet end of the vacuum pump 6 extracts the air above the second solution chamber 21 through the second connecting pipe 7, so that the air pressure in the second solution chamber 21 is reduced, and the air above the first solution chamber 20 is extracted through the third connecting pipe 23, so that the air pressure in the first solution chamber 20 is reduced, and the air in the tank body 1 is sucked into the bottom of the first solution chamber 20 through the first connecting pipe 4. The organic solution in the first solution chamber 20 dissolves the chlorine in the air, and then the air moves to the top of the first solution chamber 20 and enters the bottom of the second solution chamber 21 through the third connecting pipe 23. The chlorine in the air is dissolved again by the organic solution in the second solution chamber 21, and then reaches the top of the second solution chamber 21 and is extracted by the vacuum pump 6. Finally, the residue obtained in the tank body 1 is cooled to room temperature, and water is added to obtain the finished product.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A synthesis reactor, characterized in that: include: Tank (1); The stirring assembly further comprises a stirring rod (2), the stirring rod (2) being arranged inside the tank body (1), the stirring rod (2) being fixedly connected to the bottom of the rotating shaft (3), and the top of the rotating shaft (3) being rotatably matched with the tank body (1); The invention also includes a filter assembly, which includes a first connecting pipe (4) and a solution tank (5) for storing an organic solution, one end of the first connecting pipe (4) is connected to the upper part of the interior of the tank body (1), and the other end of the first connecting pipe (4) is connected to the lower part of the interior of the solution tank (5), a vacuum pump (6) is fixedly installed on one side of the top surface of the solution tank (5), an air inlet end of the vacuum pump (6) is connected to the upper part of the interior of the solution tank (5) through a second connecting pipe (7), and a check valve (8) is fixedly installed on one side of the top surface of the tank body (1).

2. A synthesis reactor according to claim 1, characterized in that: A feeding port (9) is fixedly mounted on one side of the top of the tank body (1), a sealing cover (10) is threadedly connected to the top of the feeding port (9), and a discharge port (11) is integrally formed at the bottom of the tank body (1), and a first valve (12) is mounted on the discharge port (11).

3. A synthesis reactor according to claim 1, characterized in that: The top of the rotating shaft (3) is in driving engagement with the output end of the motor (13), and the motor (13) is fixedly mounted at the center of the top surface of the tank body (1).

4. A synthesis reactor according to claim 1, characterized in that: A gas delivery pipe (14) for delivering chlorine gas is fixedly installed on the other side of the top of the tank body (1), and the bottom of the gas delivery pipe (14) is arranged below the inside of the tank body (1).

5. A synthesis reactor according to claim 4, characterized in that: A second valve (15) is installed on the top of the gas delivery pipe (14), and a pressure gauge (16) is provided on one side of the gas delivery pipe (14). The pressure gauge (16) is fixedly installed on the top of the tank body (1).

6. A synthesis reactor according to claim 1, characterized in that: A jacket (17) is provided around the outer side of the tank body (1), and the jacket (17) is fixedly connected to the tank body (1). A medium outlet (18) is fixedly installed above one side of the jacket (17), and a medium inlet (19) is fixedly installed below the other side of the jacket (17).

7. A synthesis reactor according to claim 1, characterized in that: A first solution chamber (20) and a second solution chamber (21) are provided inside the solution box (5), and a partition plate (22) is provided between the first solution chamber (20) and the second solution chamber (21).

8. A synthesis reactor according to claim 7, characterized in that: The partition plate (22) is fixedly connected to the inner wall of the solution tank (5), and a third connecting pipe (23) is fixedly installed on the partition plate (22). The top of the third connecting pipe (23) is connected to the upper part of the first solution chamber (20), and the bottom of the third connecting pipe (23) is connected to the second solution chamber (21).

9. A synthesis reactor according to claim 8, characterized in that: A filling port (24) for filling an organic solution is provided at the top of the first solution chamber (20) and the second solution chamber (21), and a discharge pipe (25) for discharging waste liquid is provided below one side of the first solution chamber (20) and the second solution chamber (21).

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