Continuous rectification mechanism for 2-chloro-5-chloromethylpyridine

Abstract

The utility model belongs to the technical field of 2-chloro-5-chloromethylpyridine production equipment, and particularly relates to a 2-chloro-5-chloromethylpyridine continuous rectification mechanism which comprises a first rectification furnace, a feeding pipe is fixedly connected to the outer surface of the first rectification furnace, a liquid outlet is formed in the lower surface of the first rectification furnace, a funnel is fixedly connected to the lower surface of the first rectification furnace, and a liquid outlet is formed in the lower surface of the funnel. A first collecting box is fixedly connected to the lower surface of the funnel, a first pipeline is fixedly connected to the front side face of the first collecting box, a first infusion pump is fixedly connected to the other end of the first pipeline, and a second pipeline is fixedly connected to the upper surface of the first infusion pump. The 2-chloro-5-chloromethylpyridine extraction device disclosed by the utility model is reasonable in structure, can be used for re-extracting 2-chloro-5-chloromethylpyridine in waste liquid generated by rectification during use, improves the extraction rate of 2-chloro-5-chloromethylpyridine, reduces the loss of 2-chloro-5-chloromethylpyridine, and is beneficial to preparation of 2-chloro-5-chloromethylpyridine.

Description

Technical Field

[0001] The utility model belongs to the technical field of 2-chloro-5-(chloromethyl)pyridine production equipment, and particularly relates to a continuous rectification mechanism for 2-chloro-5-(chloromethyl)pyridine. Background Technique

[0002] 2-chloro-5-(chloromethyl)pyridine (also known as CCMP) is an organic compound with a CAS number of 70258-18-3123. It is an important intermediate for synthesizing pesticides and pharmaceuticals, especially as an intermediate for the insecticides imidacloprid and acetamiprid. This compound has strong sensitization, so special care is needed during handling and use. The production of 2-chloro-5-(chloromethyl)pyridine requires a continuous rectification mechanism for 2-chloro-5-(chloromethyl)pyridine.

[0003] In the existing continuous rectification mechanism for 2-chloro-5-(chloromethyl)pyridine, the residual waste liquid in the rectification furnace is often directly discharged for waste liquid treatment after rectification. However, since the waste liquid still contains a large amount of 2-chloro-5-(chloromethyl)pyridine, directly treating the waste liquid will waste resources. Summary of the Invention

[0004] The purpose of the utility model is to provide a continuous rectification mechanism for 2-chloro-5-(chloromethyl)pyridine, which can re-extract 2-chloro-5-(chloromethyl)pyridine from the waste liquid generated by rectification, improve the extraction rate of 2-chloro-5-(chloromethyl)pyridine, reduce the loss of 2-chloro-5-(chloromethyl)pyridine, and is beneficial to the preparation of 2-chloro-5-(chloromethyl)pyridine.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: to provide a continuous rectification mechanism for 2-chloro-5-(chloromethyl)pyridine, including a first rectification furnace. The outer surface of the first rectification furnace is fixedly connected with a feed pipe. The lower surface of the first rectification furnace is provided with a liquid discharge port. The lower surface of the first rectification furnace is fixedly connected with a funnel. The lower surface of the funnel is fixedly connected with a first collection box. The front side of the first collection box is fixedly connected with a first pipe. The other end of the first pipe is fixedly connected with a first liquid extraction pump. The upper surface of the first liquid extraction pump is fixedly connected with a second pipe. The other end of the second pipe is fixedly connected with a second rectification furnace. The lower surface of the second rectification furnace is fixedly connected with a liquid discharge pipe. The lower surface of the liquid discharge pipe is fixedly connected with a second collection box. The right side of the second collection box is fixedly connected with a third pipe. The other end of the third pipe is fixedly connected with a second liquid extraction pump. The back of the second liquid extraction pump is fixedly connected with a fourth pipe. The other end of the fourth pipe is fixedly connected to the outer surface of the feed pipe.

[0006] Optionally, the second rectification furnace is located in front of the first rectification furnace, and a valve is movably installed on the outer surface of the liquid discharge pipe.

[0007] Optionally, a first heating ring is fixedly connected to the inner bottom of the first rectification furnace, and a second heating ring is fixedly connected to the inner bottom of the second rectification furnace.

[0008] Optionally, a first exhaust pipe is fixedly connected to the upper surface of the first rectification furnace, a collecting pipe is fixedly connected to the upper surface of the first rectification furnace. The cross-sectional shape of the collecting pipe is the same as that of the first exhaust pipe. A placing frame is fixedly connected to the upper surface of the first rectification furnace. A moving block is arranged inside the placing frame. A circular groove is formed in the upper surface of the moving block. The cross-sectional shape of the circular groove is the same as that of the collecting pipe. A threaded handle is arranged on the left side of the moving block. A limiting block is threadedly connected to the outer surface of the threaded handle. The right side surface of the limiting block is fixedly connected to the moving block.

[0009] Optionally, a moving groove is formed inside the first rectification furnace. A moving plate is arranged inside the moving groove. The number of the moving plates is two. Moving columns are fixedly connected to the lower surface of the moving plates.

[0010] Optionally, a turntable is movably installed on the lower surface of the first rectification furnace. An arc-shaped groove is formed inside the turntable. The number of the arc-shaped grooves is two. The moving columns are located inside the arc-shaped grooves.

[0011] Optionally, a second exhaust pipe is fixedly connected to the upper surface of the second rectification furnace. The second exhaust pipe is located above the liquid discharge pipe.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model is provided with a feed pipe, a first heating ring, a first exhaust pipe, a collection pipe, a first rectification furnace, a liquid discharge port, a funnel, a first collection box, a first liquid extraction pump, a second rectification furnace, a second heating ring, a second exhaust pipe, a valve, a second collection box and a second liquid extraction pump. When in use, the gasified raw materials are added through the feed pipe, and then the first heating ring works. The heat emitted makes the raw materials heat up, and separation is carried out according to their different boiling points. The components with lower boiling points are first separated out and discharged through the first exhaust pipe for collection. After continuous heating for a certain period of time, all the components with lower boiling points are discharged. Continuing to heat up makes 2-chloro-5-(chloromethyl)pyridine with higher boiling points discharged through the collection pipe for collection. After collection for a certain period of time, heating is stopped. Residual liquid will accumulate at the bottom of the first rectification furnace. The residual liquid falls into the first collection box through the liquid discharge port and the funnel. Continuing the above process makes the amount of residual liquid in the first collection box gradually increase. The first liquid extraction pump pumps the residual liquid from the first collection box to the second rectification furnace. Then the second heating ring works, emitting heat to make the residual liquid heat up, so that the components with lower boiling points in the residual liquid are converted into gas and discharged through the second exhaust pipe for collection. After continuous heating for a period of time, the components with lower boiling points are basically discharged. The second heating ring stops heating, and the valve is opened to discharge the remaining residual liquid into the second collection box. At this time, the residual liquid is basically 2-chloro-5-(chloromethyl)pyridine. Then the second liquid extraction pump works to transport the residual liquid back to the feed pipe to continue participating in the subsequent preparation. When the utility model is in use, 2-chloro-5-(chloromethyl)pyridine in the waste liquid generated by rectification can be re-extracted, the extraction rate of 2-chloro-5-(chloromethyl)pyridine is improved, the loss of 2-chloro-5-(chloromethyl)pyridine is reduced, which is beneficial to the preparation of 2-chloro-5-(chloromethyl)pyridine.

[0014] The utility model is provided with a threaded handle, a moving block, a circular groove, a collection pipe, a first exhaust pipe and a first rectification furnace. Rotating the threaded handle drives the limiting block to move, thereby driving the moving block to move, and further aligning the circular groove with the collection pipe and the first exhaust pipe respectively, so that the gas in the first rectification furnace can flow to the first exhaust pipe or the collection pipe controllably.

[0015] The utility model is provided with a turntable, a moving column, an arc-shaped groove, a moving plate, a moving groove, a first rectification furnace and a first collection box. Rotating the turntable drives the moving column to move in the arc-shaped groove, thereby driving the moving plate to move in the moving groove, and further enabling the moving plate to open or close, so as to control the liquid flow in the first rectification furnace to the first collection box. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 Schematic three-dimensional structure diagram of the present invention;

[0018] Figure 2 Schematic cross-sectional three-dimensional structure diagram of the present invention;

[0019] Figure 3 Schematic cross-sectional three-dimensional structure diagram of the first rectification furnace of the present invention;

[0020] Figure 4 Schematic cross-sectional three-dimensional structure diagram of the second rectification furnace of the present invention;

[0021] Figure 5 Schematic three-dimensional structure diagram at the moving block of the present invention;

[0022] Figure 6 Schematic three-dimensional structure diagram at the turntable of the present invention.

[0023] In the figure: 1. First rectification furnace; 2. Drain port; 3. Funnel; 4. First collection box; 5. First pipeline; 6. First liquid extraction pump; 7. Second pipeline; 8. Second rectification furnace; 9. Drain pipe; 10. Second collection box; 11. Valve; 12. Third pipeline; 13. Second liquid extraction pump; 14. Fourth pipeline; 15. Feed pipe; 16. First heating ring; 17. Second heating ring; 18. First exhaust pipe; 19. Collection pipe; 20. Placing frame; 21. Moving block; 22. Circular groove; 23. Threaded handle; 24. Moving groove; 25. Moving plate; 26. Moving column; 27. Turntable; 28. Arc groove; 29. Second exhaust pipe. Detailed implementation manners

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the following further details the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0028] Refer to Figure 1-6, the continuous rectification mechanism of 2-chloro-5-(chloromethyl)pyridine provided by the embodiments of the present utility model will be described. The continuous rectification mechanism of 2-chloro-5-(chloromethyl)pyridine includes a first rectification furnace 1. A feed pipe 15 is fixedly connected to the outer surface of the first rectification furnace 1. The gasified raw material is added through the feed pipe 15. Then the first heating ring 16 works, and the heat emitted makes the raw material heat up, and separation is carried out according to their different boiling points. The components with lower boiling points are first separated out and discharged and collected through the first exhaust pipe 18. After continuously heating for a certain period of time, all the components with lower boiling points are discharged. Continuing to heat up enables the 2-chloro-5-(chloromethyl)pyridine with higher boiling points to be discharged and collected through the collection pipe 19. After collecting for a certain period of time, heating is stopped. Residual liquid will accumulate at the bottom of the first rectification furnace 1. The residual liquid falls into the first collection box 4 through the drain port 2 and the funnel 3. Continuing the above process makes the amount of residual liquid in the first collection box 4 gradually increase. The first liquid extraction pump 6 pumps the residual liquid from the first collection box 4 into the second rectification furnace 8. Then the second heating ring 17 works, emitting heat to heat up the residual liquid, enabling the components with lower boiling points in the residual liquid to be converted into gas and discharged and collected through the second exhaust pipe 29. After continuously heating for a period of time, the components with lower boiling points are basically discharged. The second heating ring 17 stops heating, and the valve 11 is opened to discharge the remaining residual liquid into the second collection box 10. At this time, the residual liquid is basically 2-chloro-5-(chloromethyl)pyridine. Then the second liquid extraction pump 13 works, enabling the residual liquid to be transported back to the feed pipe 15 to continue participating in subsequent preparation; a drain port 2 is provided on the lower surface of the first rectification furnace 1. A funnel 3 is fixedly connected to the lower surface of the first rectification furnace 1. A first collection box 4 is fixedly connected to the lower surface of the funnel 3. A first pipe 5 is fixedly connected to the front side of the first collection box 4. The other end of the first pipe 5 is fixedly connected to a first liquid extraction pump 6. A second pipe 7 is fixedly connected to the upper surface of the first liquid extraction pump 6. The other end of the second pipe 7 is fixedly connected to a second rectification furnace 8. A drain pipe 9 is fixedly connected to the lower surface of the second rectification furnace 8. A second collection box 10 is fixedly connected to the lower surface of the drain pipe 9. A third pipe 12 is fixedly connected to the right side of the second collection box 10. The other end of the third pipe 12 is fixedly connected to a second liquid extraction pump 13. A fourth pipe 14 is fixedly connected to the back of the second liquid extraction pump 13. The other end of the fourth pipe 14 is fixedly connected to the outer surface of the feed pipe 15.

[0029] Compared with the prior art, the continuous rectification mechanism of 2-chloro-5-(chloromethyl)pyridine provided by the present utility model can re-extract 2-chloro-5-(chloromethyl)pyridine in the waste liquid generated by rectification during use, improving the extraction rate of 2-chloro-5-(chloromethyl)pyridine, reducing the loss of 2-chloro-5-(chloromethyl)pyridine, and being beneficial to the preparation of 2-chloro-5-(chloromethyl)pyridine.

[0030] In another embodiment of the present utility model, please refer to Figures 1 to 6, the second rectification furnace 8 is located on the front side of the first rectification furnace 1. A valve 11 is movably installed on the outer surface of the drain pipe 9. The inner bottom of the first rectification furnace 1 is fixedly connected with a first heating ring 16, and the first heating ring 16 is responsible for supplying temperature to the first rectification furnace 1. The inner bottom of the second rectification furnace 8 is fixedly connected with a second heating ring 17, and the second heating ring 17 is responsible for supplying temperature to the second rectification furnace 8. The upper surface of the first rectification furnace 1 is fixedly connected with a first exhaust pipe 18. The upper surface of the first rectification furnace 1 is fixedly connected with a collecting pipe 19. The cross-sectional shape of the collecting pipe 19 is the same as that of the first exhaust pipe 18. The upper surface of the first rectification furnace 1 is fixedly connected with a placing frame 20. A moving block 21 is arranged inside the placing frame 20. A circular groove 22 is formed on the upper surface of the moving block 21. The cross-sectional shape of the circular groove 22 is the same as that of the collecting pipe 19. A threaded handle 23 is arranged on the left side of the moving block 21. By rotating the threaded handle 23, the limiting block is driven to move, thereby driving the moving block 21 to move, and further aligning the circular groove 22 with the collecting pipe 19 and the first exhaust pipe 18 respectively, so that the gas in the first rectification furnace 1 can flow to the first exhaust pipe 18 or the collecting pipe 19 controllably. The outer surface of the threaded handle 23 is threadedly connected with a limiting block, and the right side surface of the limiting block is fixedly connected with the moving block 21.

[0031] In another embodiment of the present invention, please refer to Figures 1 to 6 , a moving groove 24 is formed inside the first rectification furnace 1. A moving plate 25 is arranged inside the moving groove 24. The number of the moving plates 25 is two. The lower surface of the moving plate 25 is fixedly connected with a moving column 26. A turntable 27 is movably installed on the lower surface of the first rectification furnace 1. By rotating the turntable 27, the moving column 26 is driven to move in the arc-shaped groove 28, thereby driving the moving plate 25 to move in the moving groove 24, and further opening or closing the moving plate 25, so that the liquid flow in the first rectification furnace 1 can be controlled to flow to the first collection box 4. An arc-shaped groove 28 is formed inside the turntable 27. The number of the arc-shaped grooves 28 is two. The moving column 26 is located inside the arc-shaped groove 28. The upper surface of the second rectification furnace 8 is fixedly connected with a second exhaust pipe 29. The second exhaust pipe 29 is located above the drain pipe 9.

[0032] Working principle: The gasified raw materials are added through the feed pipe 15, and then the first heating ring 16 operates. The heat dissipated causes the raw materials to heat up, and separation is carried out according to their different boiling points. The components with lower boiling points are first separated and discharged through the first exhaust pipe 18 for collection. After continuous heating for a certain period of time, all the components with lower boiling points are discharged. Then, the temperature is further increased to cause 2-chloro-5-(chloromethyl)pyridine with a higher boiling point to be discharged through the collection pipe 19 for collection. After collecting for a certain period of time, the heating is stopped. Residual liquid will accumulate at the bottom of the first rectification furnace 1, and the residual liquid falls into the first collection box 4 through the drain port 2 and the funnel 3. Continuing the above process, the amount of residual liquid in the first collection box 4 gradually increases. Then, the first liquid extraction pump 6 pumps the residual liquid from the first collection box 4 into the second rectification furnace 8. Next, the second heating ring 17 operates, dissipating heat to heat up the residual liquid, causing the components with lower boiling points in the residual liquid to be converted into gas and discharged through the second exhaust pipe 29 for collection. After continuous heating for a period of time, the components with lower boiling points are basically discharged. The second heating ring 17 stops heating, and the valve 11 is opened to discharge the remaining residual liquid into the second collection box 10. At this time, the residual liquid is basically 2-chloro-5-(chloromethyl)pyridine. Then, the second liquid extraction pump 13 operates to transport the residual liquid back to the feed pipe 15 to continue participating in the subsequent preparation.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A continuous distillation mechanism for 2-chloro-5-chloromethylpyridine, comprising a first distillation furnace (1), characterized in that: The outer surface of the first distillation furnace (1) is fixedly connected to a feed pipe (15); the lower surface of the first distillation furnace (1) is provided with a liquid discharge port (2); the lower surface of the first distillation furnace (1) is fixedly connected to a funnel (3); the lower surface of the funnel (3) is fixedly connected to a first collecting box (4); the front side of the first collecting box (4) is fixedly connected to a first pipeline (5); the other end of the first pipeline (5) is fixedly connected to a first liquid pump (6); the upper surface of the first liquid pump (6) is fixedly connected to a second pipeline (7); the second pipeline ( 7) is fixedly connected to a second distillation furnace (8), a drain pipe (9) is fixedly connected to the lower surface of the second distillation furnace (8), a second collecting box (10) is fixedly connected to the lower surface of the drain pipe (9), a third pipeline (12) is fixedly connected to the right side of the second collecting box (10), the other end of the third pipeline (12) is fixedly connected to a second liquid pump (13), the back of the second liquid pump (13) is fixedly connected to a fourth pipeline (14), and the other end of the fourth pipeline (14) is fixedly connected to the outer surface of the feed pipe (15).

2. The continuous distillation mechanism of 2-chloro-5-chloromethylpyridine according to claim 1, characterized in that: The second distillation furnace (8) is located in front of the first distillation furnace (1), and a valve (11) is movably installed on the outer surface of the liquid discharge pipe (9).

3. The continuous distillation mechanism of 2-chloro-5-chloromethylpyridine according to claim 1, characterized in that: A first heating ring (16) is fixedly connected to the inner bottom of the first distillation furnace (1), and a second heating ring (17) is fixedly connected to the inner bottom of the second distillation furnace (8).

4. The continuous distillation mechanism of 2-chloro-5-chloromethylpyridine according to claim 1, characterized in that: The upper surface of the first distillation furnace (1) is fixedly connected to a first exhaust pipe (18), the upper surface of the first distillation furnace (1) is fixedly connected to a collecting pipe (19), the cross-sectional shape of the collecting pipe (19) is the same as that of the first exhaust pipe (18), the upper surface of the first distillation furnace (1) is fixedly connected to a placement frame (20), a moving block (21) is arranged inside the placement frame (20), a circular groove (22) is provided on the upper surface of the moving block (21), the cross-sectional shape of the circular groove (22) is the same as that of the collecting pipe (19), a threaded handle (23) is arranged on the left side of the moving block (21), the outer surface of the threaded handle (23) is threadedly connected to a limit block, and the right side of the limit block is fixedly connected to the moving block (21).

5. The continuous distillation mechanism of 2-chloro-5-chloromethylpyridine according to claim 1, characterized in that: A moving groove (24) is provided inside the first distillation furnace (1), and a moving plate (25) is provided inside the moving groove (24). There are two moving plates (25), and a moving column (26) is fixedly connected to the lower surface of the moving plate (25).

6. The continuous distillation mechanism of 2-chloro-5-chloromethylpyridine according to claim 5, characterized in that: A turntable (27) is movably mounted on the lower surface of the first distillation furnace (1), and an arc-shaped groove (28) is provided inside the turntable (27). The number of the arc-shaped grooves (28) is two, and the movable column (26) is located inside the arc-shaped grooves (28).

7. The continuous distillation mechanism of 2-chloro-5-chloromethylpyridine according to claim 1, characterized in that: A second exhaust pipe (29) is fixedly connected to the upper surface of the second rectification furnace (8), and the second exhaust pipe (29) is located above the liquid discharge pipe (9).

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