Rectification device for producing 2-chloro-5-chloromethylpyridine

Abstract

The utility model relates to a rectification device for production of 2-chloro-5-chloromethylpyridine, which comprises a base and a support plate fixedly connected to the back of the top of the base, a cooling tank is fixedly mounted at the top of the base, a cooling mechanism extending to the outside of the cooling tank is arranged inside the cooling tank, and the support plate is fixedly connected to the top of the cooling tank. The cooling mechanism comprises a water storage tank fixedly installed on the front face of the supporting plate. According to the rectification device for 2-chloro-5-chloromethylpyridine production, by arranging a water storage tank and a water inlet pipe, a cooling liquid in the water storage tank can be conveyed into a cooling tank, so that a heat conducting plate in the cooling tank can be in full contact with the cooling liquid, and by arranging a cooling pipe which is in a snake shape, the cooling effect is improved; the cooling liquid in the water storage tank and the cooling tank can form circulation through the pump body, the circulating cooling effect can be achieved, then the sufficient cooling effect is achieved, and the situation that cooling is not thorough is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of 2-chloro-5-chloromethylpyridine production, in particular to a rectification device used for 2-chloro-5-chloromethylpyridine production. Background Art

[0002] 2-Chloro-5-chloromethylpyridine is an organic compound and an important intermediate in the synthesis of pesticides and pharmaceuticals. It has a strong allergenic effect and is used as an intermediate in the pesticides imidacloprid and acetamiprid. 2-Chloro-5-chloromethylpyridine is also an intermediate in the insecticides imidacloprid and acetamiprid.

[0003] A distillation device is required in the production process of 2-chloro-5-chloromethylpyridine. After searching, Chinese patent CN212854685U in the prior art discloses a distillation device for the organic intermediate 2-chloro-5-chloromethylpyridine, which includes a base and two fixed plates. A mounting frame is welded to the top outer wall of the base, and a circulation pump and a distillation tank are installed on the top outer wall of the mounting frame by bolts. The distillation tank includes an outer tank body and an inner tank body. An electric heating pipe is wrapped around the outside of the inner tank body, and the electric heating pipe is located between the side inner wall of the outer tank body and the side outer wall of the inner tank body. End covers are installed at the top and bottom ends of the inner tank body by bolts, and an air outlet pipe is inserted on the top outer wall of the end cover at the top end of the inner tank body. A feed pipe, a reflux pipe, a circulation pipe and a drain pipe distributed in an upper and lower structure are inserted on the side outer wall of the inner tank body. The utility model heats the dichloropentachloromethylpyridine solution by using an electric heating tube instead of a traditional water bath, so that the fluctuation of the heating temperature can be controlled within a smaller range, so that the solute and the solvent can be better separated, thereby improving the purity and quality of the product.

[0004] However, during use of the utility model, since the gas after distillation needs to be cooled before it can form a liquid, and the contact time between the gas and the condenser is short, and the contact area is small, part of the gas may not be cooled, resulting in insufficient gas cooling, affecting work efficiency, and failing to meet production needs. Therefore, a distillation device for the production of 2-chloro-5-chloromethylpyridine is proposed to solve the above-mentioned problems. Utility Model Content

[0005] In response to the deficiencies in the prior art, the utility model provides a distillation device for the production of 2-chloro-5-chloromethylpyridine, which has the advantage of good cooling effect and solves the problem that the gas after distillation needs to be cooled before it can form a liquid, and the contact time between the gas and the condenser is short, and the contact area is small, which may cause part of the gas to not be cooled, resulting in insufficient gas cooling, affecting work efficiency, and failing to meet production needs.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a distillation device for the production of 2-chloro-5-chloromethylpyridine, comprising a base and a support plate fixedly connected to the back of the top of the base, a cooling tank fixedly mounted on the top of the base, and a cooling mechanism extending to the outside of the cooling tank;

[0007] The cooling mechanism includes a water tank fixedly mounted on the front of the support plate, a heat conducting plate fixedly mounted on the inner top wall of the cooling tank, a water inlet pipe fixedly connected between the water tank and the cooling tank, a pump body fixedly connected to one side of the cooling tank, a delivery pipe fixedly connected to the top of the pump body extending to the inside of the water tank, and a connecting pipe extending to the inside of the cooling tank fixedly connected to the end of the pump body away from the delivery pipe.

[0008] Furthermore, a valve is fixedly installed on the outside of the water inlet pipe, and a sewage pipe extending into the interior of the cooling tank is fixedly connected to the bottom of the cooling tank. The water storage tank and the cooling tank are both located on the front of the support plate.

[0009] Furthermore, a water filling pipe extending into the interior of the water tank is fixedly connected to the top of the water tank, and a liquid level window is fixedly connected to the front of the water tank.

[0010] Furthermore, the interior of the heat conduction plate is fixedly connected to a cooling pipe extending to the outside thereof, the top end of the cooling pipe is fixedly connected to a connecting pipe extending to the outside of the cooling tank, and the bottom end of the cooling pipe is fixedly connected to a drain pipe extending to the bottom of the cooling tank.

[0011] Furthermore, a storage tank is fixedly installed on the top of the base, a cover plate is fixedly installed on the top of the storage tank, and one end of the connecting pipe away from the cooling tank is fixedly connected to the storage tank.

[0012] Furthermore, a driving motor is fixedly connected to the top of the cover plate, a rotating shaft extending into the interior of the storage tank is fixedly connected to the output shaft of the driving motor, and a stirring rod is fixedly installed on the outside of the rotating shaft.

[0013] Furthermore, a control device is fixedly connected to one side of the top of the base away from the cooling tank, and a feed pipe extending into the interior of the storage tank is fixedly connected to one side of the storage tank.

[0014] Furthermore, a mounting sleeve is fixedly installed on the outside of the storage tank, and a heating pipe is fixedly connected to the inside of the mounting sleeve.

[0015] Compared with the prior art, the present invention provides a distillation device for the production of 2-chloro-5-chloromethylpyridine, which has the following beneficial effects:

[0016] 1. The distillation device for producing 2-chloro-5-chloromethylpyridine is provided with a water storage tank and a water inlet pipe, so that the coolant inside the water storage tank can be transported to the inside of the cooling tank, so that the heat conduction plate inside the cooling tank can fully contact with the coolant. Then, by providing a cooling pipe, the cooling pipe is serpentine-shaped, so that the gas inside the cooling pipe can be in contact with the coldness of the coolant for a long time. By providing a pump body, the coolant inside the water storage tank and the cooling tank can be circulated, so as to achieve a circulating cooling effect, thereby achieving a sufficient cooling effect and avoiding the situation of incomplete cooling.

[0017] 2. The distillation device for the production of 2-chloro-5-chloromethylpyridine is provided with a driving motor to drive the rotating shaft and the stirring rod to rotate, so as to facilitate the full stirring of the solution inside the storage tank and improve the efficiency of its heating and evaporation. It solves the problem that the distilled gas needs to be cooled before it can form a liquid, and the contact time between the gas and the condenser is short, and the contact area is large, which may cause part of the gas to not be cooled, resulting in insufficient gas cooling, affecting work efficiency, and failing to meet production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of the structure of the utility model;

[0019] Figure 2 This is a structural perspective diagram of the water storage tank of the utility model;

[0020] Figure 3 This is a partial cross-sectional view of the cooling tank of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the cooling pipe of the utility model.

[0022] In the figure: 1 base, 2 support plate, 3 cooling tank, 4 water storage tank, 5 heat conduction plate, 6 water inlet pipe, 7 pump body, 8 delivery pipe, 9 connecting pipe, 10 sewage pipe, 11 cooling pipe, 12 connecting pipe, 13 drainage pipe, 14 storage tank, 15 cover plate, 16 drive motor, 17 rotating shaft, 18 stirring rod, 19 mounting sleeve, 20 heating pipe. DETAILED DESCRIPTION

[0023] 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.

[0024] Example 1:

[0025] See also Figure 1-4 In this embodiment, a distillation device for producing 2-chloro-5-chloromethylpyridine includes a base 1 and a support plate 2 fixedly connected to the top and back of the base 1. A cooling tank 3 is fixedly installed on the top of the base 1. A cooling mechanism extending to the outside of the cooling tank 3 is provided inside the cooling tank 3. The cooling mechanism includes a water storage tank 4 fixedly installed on the front of the support plate 2, a heat conducting plate 5 fixedly installed on the inner top wall of the cooling tank 3, a water inlet pipe 6 fixedly connected between the water storage tank 4 and the cooling tank 3, a pump body 7 fixedly connected to one side of the cooling tank 3, a delivery pipe 8 extending to the inside of the water storage tank 4 is fixedly connected to the top of the pump body 7, and a connecting pipe 9 extending to the inside of the cooling tank 3 is fixedly connected to the end of the pump body 7 away from the delivery pipe 8.

[0026] Among them, a valve is fixedly installed on the outside of the water inlet pipe 6, the bottom of the cooling tank 3 is fixedly connected to a sewage pipe 10 extending into the interior thereof, the water storage tank 4 and the cooling tank 3 are both located on the front of the support plate 2, the interior of the heat conduction plate 5 is fixedly connected to a cooling pipe 11 extending into the outside thereof, the top end of the cooling pipe 11 is fixedly connected to a connecting pipe 12 extending to the outside of the cooling tank 3, and the bottom end of the cooling pipe 11 is fixedly connected to a drain pipe 13 extending to the bottom of the cooling tank 3.

[0027] It should be noted that the top of the water tank 4 is fixedly connected to a water filling pipe extending into the interior thereof, and the front of the water tank 4 is fixedly connected to a liquid level window. The liquid level window is provided to facilitate staff to observe the water volume of the coolant in real time.

[0028] In this embodiment, a storage tank 14 is fixedly installed on the top of the base 1, a cover plate 15 is fixedly installed on the top of the storage tank 14, the end of the connecting pipe 12 away from the cooling tank 3 is fixedly connected to the storage tank 14, and a drive motor 16 is fixedly connected to the top of the cover plate 15. A rotating shaft 17 extending to the interior of the storage tank 14 is fixedly connected to the output shaft of the drive motor 16, and a stirring rod 18 is fixedly installed on the outside of the rotating shaft 17.

[0029] Among them, a bearing compatible with the rotating shaft 17 is fixedly installed inside the cover plate 15. The rotating shaft 16 and the stirring rod 18 are driven to rotate by the driving motor 16, so as to facilitate the full stirring of the solution inside the storage tank 14 and improve its heating and evaporation efficiency. The top of the base 1 is fixedly connected to the side away from the cooling tank 3 with a control device, and one side of the storage tank 14 is fixedly connected to a feed pipe extending into the interior thereof.

[0030] Example 2:

[0031] See also Figure 1 On the basis of the first embodiment, it includes a mounting sleeve 19 fixedly mounted on the outside of the storage tank 14 , and a heating pipe 20 is fixedly connected to the interior of the mounting sleeve 19 .

[0032] In this embodiment, the control device can control the temperature of the heating tube 20, and the mounting sleeve 19 is a hollow cylinder.

[0033] By adopting the above technical solution, the solution inside the storage tank 14 can be heated and distilled by providing the heating pipe 20, thereby completing the separation of substances.

[0034] The working principle of the above embodiment is:

[0035] First, inject coolant into the water tank 4, and at the same time open the valve on the water inlet pipe 6 to allow the coolant to enter the cooling tank 3 through the water inlet pipe 6. After injecting a sufficient amount of coolant, heat the heating tube 20 through the control device, and then preheat the storage tank 14. Then, the solution to be distilled is transported to the storage tank 14, and at the same time, the drive motor 16 is started to drive the stirring rod 18 to rotate so that the solution is fully heated. After distillation for a period of time, open the valve on the connecting pipe 12 to transport the steam to the cooling pipe 11. The steam is cooled in the cooling pipe 11 and condensed into water droplets, which can then be collected by the staff at the drain pipe 13.

[0036] The electrical components mentioned in this article are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device that controls a computer, etc., and the existing public power connection technology is not described in detail in this article.

[0037] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0038] 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 distillation device for producing 2-chloro-5-chloromethylpyridine, comprising a base (1) and a support plate (2) fixedly connected to the top back of the base (1), characterized in that: A cooling tank (3) is fixedly mounted on the top of the base (1), and a cooling mechanism extending to the outside of the cooling tank (3) is provided inside the cooling tank (3); The cooling mechanism comprises a water storage tank (4) fixedly mounted on the front of the support plate (2); a heat conducting plate (5) fixedly mounted on the inner top wall of the cooling tank (3); a water inlet pipe (6) fixedly connected between the water storage tank (4) and the cooling tank (3); a pump body (7) fixedly connected to one side of the cooling tank (3); a top end of the pump body (7) fixedly connected to a delivery pipe (8) extending into the interior of the water storage tank (4); and an end of the pump body (7) away from the delivery pipe (8) fixedly connected to a connecting pipe (9) extending into the interior of the cooling tank (3).

2. A distillation device for producing 2-chloro-5-chloromethylpyridine according to claim 1, characterized in that: A valve is fixedly installed on the outside of the water inlet pipe (6), and a sewage pipe (10) extending into the interior of the cooling tank (3) is fixedly connected to the bottom of the cooling tank (3). The water storage tank (4) and the cooling tank (3) are both located on the front side of the support plate (2).

3. A distillation device for producing 2-chloro-5-chloromethylpyridine according to claim 1, characterized in that: The top of the water storage tank (4) is fixedly connected to a water injection pipe extending into the interior thereof, and the front of the water storage tank (4) is fixedly connected to a liquid level window.

4. A distillation device for producing 2-chloro-5-chloromethylpyridine according to claim 1, characterized in that: The interior of the heat conducting plate (5) is fixedly connected to a cooling pipe (11) extending to the outside thereof, the top end of the cooling pipe (11) is fixedly connected to a connecting pipe (12) extending to the outside of the cooling tank (3), and the bottom end of the cooling pipe (11) is fixedly connected to a drain pipe (13) extending to the bottom of the cooling tank (3).

5. A distillation device for producing 2-chloro-5-chloromethylpyridine according to claim 4, characterized in that: A storage tank (14) is fixedly mounted on the top of the base (1), a cover plate (15) is fixedly mounted on the top of the storage tank (14), and one end of the connecting pipe (12) away from the cooling tank (3) is fixedly connected to the storage tank (14).

6. A distillation device for producing 2-chloro-5-chloromethylpyridine according to claim 5, characterized in that: A driving motor (16) is fixedly connected to the top of the cover plate (15), a rotating shaft (17) extending into the interior of the storage tank (14) is fixedly connected to the output shaft of the driving motor (16), and a stirring rod (18) is fixedly installed on the outside of the rotating shaft (17).

7. A distillation device for producing 2-chloro-5-chloromethylpyridine according to claim 5, characterized in that: A control device is fixedly connected to one side of the top of the base (1) away from the cooling tank (3), and a feed pipe extending into the interior of the storage tank (14) is fixedly connected to one side of the storage tank (14).

8. A distillation device for producing 2-chloro-5-chloromethylpyridine according to claim 5, characterized in that: A mounting sleeve (19) is fixedly mounted on the outside of the storage tank (14), and a heating pipe (20) is fixedly connected to the inside of the mounting sleeve (19).

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