High-purity preparation device for synthesizing acetonitrile

Abstract

The utility model belongs to the technical field of acetonitrile preparation devices, and particularly relates to a high-purity preparation device for synthesizing acetonitrile, which comprises a light component removal tower and a rectifying tower, the front end of the light component removal tower is fixedly connected with a feed pipe, the lower end face of the light component removal tower is fixedly connected with a feed pipe, and the other end of the feed pipe is fixedly connected to a feed port of the rectifying tower. The upper end face of the light component removal tower is fixedly connected with a front fraction pipeline, the front fraction pipeline is fixedly connected with a first condenser, the other end of the front fraction pipeline is fixedly connected with a return tank, the other end of the return tank is fixedly connected with a first return pipe, and the first return pipe is fixedly connected with a return pump and a reboiler. According to the utility model, the light component removal tower is arranged before the flow of the rectifying tower to treat raw materials, so that impurities in acetonitrile products can be reduced, the purity of the acetonitrile products is improved, and the purposes of energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of acetonitrile preparation apparatus, specifically a high-purity preparation apparatus for synthesizing acetonitrile. Background Technology

[0002] Acetonitrile, also known as methyl cyanide, is a colorless, highly volatile liquid with a distinctive odor similar to ether. It can dissolve a wide variety of organic, inorganic, and gaseous substances, making it an excellent organic solvent and an important raw material in fine chemicals. Acetonitrile is also used as a mobile phase separation molecule in column chromatography and, more modernly, high-performance liquid chromatography.

[0003] In existing technologies, acetonitrile distillation typically involves feeding the raw material into a distillation column, heating and vaporizing it, and then condensing the vapor from the top of the column. Part of the vapor is used as the distillate product, while the rest is recycled for distillation. This process requires multiple cycles of distillation to obtain a high-purity acetonitrile product, resulting in high energy consumption and hindering energy conservation and environmental protection. Summary of the Invention

[0004] The purpose of this invention is to provide a high-purity preparation device for synthesizing acetonitrile, which achieves the goals of energy saving and environmental protection, and improves the purification effect.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A high-purity acetonitrile synthesis apparatus is provided, comprising a light-light-removal tower and a distillation tower. A feed pipe is fixedly connected to the front end of the light-light-removal tower, and a feeding pipe is fixedly connected to the lower end face of the light-light-removal tower. The other end of the feeding pipe is fixedly connected to the inlet of the distillation tower, and a feed pump is installed on the feeding pipe. A pre-distillate pipe is fixedly connected to the upper end face of the light-light-removal tower, and a condenser is fixedly connected to the pre-distillate pipe. A reflux tank is fixedly connected to the other end of the pre-distillate pipe, and a reflux pipe is fixedly connected to the other end of the reflux tank. A reflux pump and a reboiler are fixedly connected to the reflux pipe, and the other end of the reflux pipe is fixedly connected to the reflux port of the light-light-removal tower. A clamping mechanism is fitted onto the outer end of the reflux tank.

[0006] Optionally, the reflux port of the light-light removal tower is located at the upper middle position of the light-light removal tower, a fixed plate is fixedly connected to one side of the light-light removal tower, a receiving tank is provided on the fixed plate, and a sampling outlet is opened at the lower end of the pipe between the reflux pump and the reboiler, and the sampling outlet is located directly above the receiving tank.

[0007] Optionally, a discharge pipe is fixedly connected to the upper end face of the distillation column, and a condenser is fixedly connected to the discharge pipe.

[0008] Optionally, a conveying pipe is fixedly connected to the lower end face of the distillation column, a circulation pump is fixedly connected to the other end of the conveying pipe, a discharge pipe is fixedly connected to the output end of the circulation pump, a second reflux pipe is fixedly connected to the outer wall of the discharge pipe, an adsorption mechanism is fixedly connected to the outer wall of the second reflux pipe, and the other end of the adsorption mechanism is fixedly connected to the reflux port of the distillation column through a pipe.

[0009] Optionally, the clamping mechanism includes a mounting frame, which is fixedly connected to the outer wall of the light-duty tower. Two mounting plates are fixedly connected to the lower end face of the mounting frame. Two bidirectional lead screws are rotatably connected to each of the two mounting plates. Slider blocks are threadedly connected to both sides of the two bidirectional lead screws. A clamping plate is fixedly connected between the two sliders located at the same end. The reflux tank is disposed between the two clamping plates.

[0010] Optionally, the front end of one of the bidirectional lead screws passes through the mounting plate and is fixedly connected to a rotating wheel, and the rear ends of the two bidirectional lead screws are sleeved with a synchronization mechanism.

[0011] Optionally, the synchronization mechanism includes a timing belt and two timing pulleys. The timing belt is sleeved on the outer wall of the two timing pulleys and meshes with the two timing pulleys. The two timing pulleys are respectively fixedly connected to the outer wall of two bidirectional lead screws.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. This utility model sets up a light-weight removal tower in the previous process of the distillation column, and uses the top of the light-weight removal tower to circulate the raw material. The low-boiling-point impurities separated by the condenser at the top of the light-weight removal tower are circulated multiple times to reduce the impurities in the acetonitrile product, thereby improving its purity. Then, the acetonitrile material is pumped into the light-weight removal tower through a feed pump and feed pipe for light-weight removal treatment, thus achieving the purpose of energy saving and environmental protection.

[0014] 2. This utility model uses a clamping mechanism to control the relative movement of two sliders by rotating a bidirectional lead screw, thereby driving the relative movement of two clamping plates to clamp the reflux tank. This facilitates the periodic disassembly and cleaning of the reflux tank, and ensures its stability and ease of installation when reinstalling it. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a bottom view of the clamping mechanism of this utility model.

[0018] Figure 3 This is a top view of the structure of this utility model;

[0019] Figure 4 This is a bottom view of the structure of this utility model.

[0020] In the diagram: 1. Light weight removal tower; 11. Feed pipe; 12. Feeding pipe; 13. Feed pump; 14. Fore-distillate pipe; 15. Condenser I; 16. Reflux tank; 17. Reflux pipe I; 18. Reflux pump; 19. Reboiler; 110. Receiving tank; 2. Distillation column; 21. Discharge pipe; 22. Condenser II; 23. Delivery pipe; 24. Circulation pump; 25. Reflux pipe II; 26. Adsorption mechanism; 3. Clamping mechanism; 31. Mounting bracket; 32. Mounting plate; 33. Two-way lead screw; 34. Slider; 35. Clamping plate; 36. Synchronization mechanism. Detailed Implementation

[0021] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] Reference Figure 1-4 The present invention provides a high-purity acetonitrile synthesis apparatus according to an embodiment of the present invention. The apparatus includes a light component removal column 1 and a distillation column 2. A feed pipe 11 is fixedly connected to the front end of the light component removal column 1, and a feed pipe 12 is fixedly connected to the lower end face of the column 1. The other end of the feed pipe 12 is fixedly connected to the inlet of the distillation column 2, and a feed pump 13 is installed on the feed pipe 12. A pre-distillate pipe 14 is fixedly connected to the upper end face of the light component removal column 1. The pre-distillate pipe 14 is used to collect the light component, and a condenser 15 is fixedly connected to the pre-distillate pipe 14. The other end of 4 is fixedly connected to a reflux tank 16, and the other end of the reflux tank 16 is fixedly connected to a reflux pipe 17. A reflux pump 18 and a reboiler 19 are fixedly connected to the reflux pipe 17 respectively. The other end of the reflux pipe 17 is fixedly connected to the reflux port of the light dust removal tower 1. The outer end of the reflux tank 16 is fitted with a clamping mechanism 3. Since the reflux tank 16 needs to be disassembled periodically to clean the internal salt deposits or sediments, the clamping mechanism 3 can clamp and fix the reflux tank 16, making it convenient for installation.

[0026] The present invention provides a high-purity preparation device for synthesizing acetonitrile. Compared with the prior art, it can circulate the raw material by utilizing the top of the light-removal tower 1 before the process of distillation tower 2 begins, thereby reducing impurities in the acetonitrile product, improving its purity, effectively saving resources, and being more green and environmentally friendly.

[0027] In another embodiment of this utility model, please refer to Figure 1 and Figure 4 The reflux port of the light component removal tower 1 is located in the upper middle position of the light component removal tower 1. A fixed plate is fixedly connected to one side of the light component removal tower 1, and a receiving tank 110 is provided on the fixed plate. A sampling outlet is opened at the lower end of the pipe between the reflux pump 18 and the reboiler 19. The sampling outlet is located directly above the receiving tank 110. The light component is collected through the front fraction pipe 14 at the top of the light component removal tower 1. Part of the light component flows to the receiving tank 110, and the other part flows back into the light component removal tower 1 through the reboiler 19 for recycling.

[0028] In another embodiment of this utility model, please refer to Figure 1A discharge pipe 21 is fixedly connected to the upper end face of the distillation column 2. A condenser 22 is fixedly connected to the discharge pipe 21. A conveying pipe 23 is fixedly connected to the lower end face of the distillation column 2. A circulation pump 24 is fixedly connected to the other end of the conveying pipe 23. A discharge pipe is fixedly connected to the output end of the circulation pump 24. A reflux pipe 25 is fixedly connected to the outer wall of the discharge pipe. An adsorption mechanism 26 is fixedly connected to the outer wall of the reflux pipe 25. The other end of the adsorption mechanism 26 is fixedly connected to the reflux port of the distillation column 2 through a pipe. Since the technical principle of the distillation column 2 is existing technology, it will not be described in detail here.

[0029] In another embodiment of this utility model, please refer to Figures 2 to 4 The clamping mechanism 3 includes a mounting frame 31, which is fixedly connected to the outer wall of the light-duty tower 1. Two mounting plates 32 are fixedly connected to the lower end face of the mounting frame 31. A bidirectional lead screw 33 is rotatably connected to each of the two mounting plates 32. Slider blocks 34 are threadedly connected to both sides of the two bidirectional lead screws 33. A clamping plate 35 is fixedly connected between the two sliders 34 located at the same end. The reflux tank 16 is positioned between the two clamping plates 35. By rotating the bidirectional lead screw 33, the sliders 34 threaded at both ends can move relative to each other, thereby causing the two clamping plates 35 to clamp and fix the reflux tank 16, facilitating the installation of the reflux tank 16. The mechanism limits the movement of the two bidirectional lead screws 33. The front end of one of the bidirectional lead screws 33 passes through the mounting plate 32 and is fixedly connected to a rotating wheel. The rear ends of the two bidirectional lead screws 33 are sleeved with a synchronization mechanism 36, which can drive the bidirectional lead screws 33 to rotate using the rotating wheel, thereby driving the slider 34 to move. The synchronization mechanism 36 includes a timing belt and two timing pulleys. The timing belt is sleeved on the outer wall of the two timing pulleys and meshes with the two timing pulleys. The two timing pulleys are fixedly connected to the outer wall of the two bidirectional lead screws 33 respectively. By using the timing belt to drive the two timing pulleys to rotate simultaneously, the two bidirectional lead screws 33 can rotate simultaneously, thereby making the two clamping plates 35 move stably.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-purity preparation apparatus for synthesizing acetonitrile, comprising a light-light-removal column (1) and a distillation column (2), characterized in that: The front end of the light-light removal tower (1) is fixedly connected to a feed pipe (11), and the lower end face of the light-light removal tower (1) is fixedly connected to a feeding pipe (12). The other end of the feeding pipe (12) is fixedly connected to the inlet of the distillation tower (2), and a feed pump (13) is installed on the feeding pipe (12). The upper end face of the light-light removal tower (1) is fixedly connected to a pre-distillate pipe (14), and a condenser is fixedly connected to the pre-distillate pipe (14). One (15), the other end of the fore fraction pipe (14) is fixedly connected to a reflux tank (16), the other end of the reflux tank (16) is fixedly connected to a reflux pipe (17), a reflux pump (18) and a reboiler (19) are fixedly connected to the reflux pipe (17), the other end of the reflux pipe (17) is fixedly connected to the reflux port of the light stripping tower (1), and a clamping mechanism (3) is sleeved on the outer end of the reflux tank (16).

2. The high-purity preparation apparatus for synthesizing acetonitrile as described in claim 1, characterized in that: The reflux port of the light-light removal tower (1) is located in the upper middle position of the light-light removal tower (1). A fixed plate is fixedly connected to one side of the light-light removal tower (1). A receiving tank (110) is provided on the fixed plate. A sampling outlet is opened at the lower end of the pipe between the reflux pump (18) and the reboiler (19). The sampling outlet is located directly above the receiving tank (110).

3. The high-purity preparation apparatus for synthesizing acetonitrile as described in claim 1, characterized in that: The upper end face of the distillation column (2) is fixedly connected to a discharge pipe (21), and a condenser (22) is fixedly connected to the discharge pipe (21).

4. The apparatus for preparing high-purity synthetic acetonitrile as described in claim 1, characterized in that: A conveying pipe (23) is fixedly connected to the lower end face of the distillation column (2). A circulation pump (24) is fixedly connected to the other end of the conveying pipe (23). A discharge pipe is fixedly connected to the output end of the circulation pump (24). A reflux pipe (25) is fixedly connected to the outer wall of the discharge pipe. An adsorption mechanism (26) is fixedly connected to the outer wall of the reflux pipe (25). The other end of the adsorption mechanism (26) is fixedly connected to the reflux port of the distillation column (2) through a pipe.

5. The high-purity preparation apparatus for synthesizing acetonitrile as described in claim 1, characterized in that: The clamping mechanism (3) includes a mounting frame (31), which is fixedly connected to the outer wall of the light removal tower (1). Two mounting plates (32) are fixedly connected to the lower end face of the mounting frame (31). Two bidirectional lead screws (33) are rotatably connected to the two mounting plates (32). Slider blocks (34) are threadedly connected to both sides of the two bidirectional lead screws (33). A clamping plate (35) is fixedly connected between the two sliders (34) located at the same end. The reflux tank (16) is arranged between the two clamping plates (35).

6. The apparatus for preparing high-purity acetonitrile as described in claim 5, characterized in that: One of the bidirectional lead screws (33) has its front end passing through the mounting plate (32) and is fixedly connected to a rotating wheel, and the rear ends of the two bidirectional lead screws (33) are sleeved with a synchronization mechanism (36).

7. The apparatus for preparing high-purity synthetic acetonitrile as described in claim 6, characterized in that: The synchronization mechanism (36) includes a timing belt and two timing pulleys. The timing belt is sleeved on the outer wall of the two timing pulleys and meshes with the two timing pulleys. The two timing pulleys are respectively fixedly connected to the outer wall of two bidirectional lead screws (33).

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