Equipment for filtering and purifying impurities in dimethyl carbonate raw material

Abstract

The utility model discloses dimethyl carbonate raw material impurity filtering and purifying equipment, which belongs to the technical field of experimental equipment and comprises a filtering component, and the filtering component comprises a glass tube, a positioning cotton piece and activated carbon. The device further comprises two storage assemblies, each storage assembly comprises a spherical bottle, a first sealing plug is fixedly installed at the bottom of each spherical bottle, the first sealing plugs are connected with the two ends of the glass tube in a sealed and inserted mode, and through holes are formed in the centers of the first sealing plugs. The rotary assembly is arranged, the structure is simple, convenience and practicability are achieved, the glass tube can be conveniently rotated, dimethyl carbonate in the two sets of spherical bottles can repeatedly pass through the glass tube, formaldehyde is filtered for multiple times through activated carbon in the glass tube, the filtering effect is improved, the whole process is conducted in a relatively sealed environment, and the practicability is high. The pollution to the experimental environment caused by the leakage of the dimethyl carbonate is avoided, and the waste of experimental materials is also prevented.

Description

Technical Field

[0001] This utility model relates to the field of experimental equipment technology, specifically to a dimethyl carbonate raw material impurity filtration and purification device. Background Technology

[0002] Dimethyl carbonate (DMC) is a non-toxic, environmentally friendly, and widely used chemical raw material. It can be used as a solvent, reaction medium, or raw material in drug synthesis and formulation development. Currently, DMC is usually prepared by transesterification. However, the methanol used in transesterification may have insufficient purity, resulting in formaldehyde mixed in the prepared DMC. In the laboratory, formaldehyde mixed in DMC can interfere with experimental results, cause side reactions, and affect the accuracy of detection. It may also form explosive mixtures or cause uncontrolled reactions. Therefore, it is necessary to strictly control the purity of DMC and standardize the operating procedures.

[0003] In the laboratory, activated carbon is usually filled into a glass tube, and dimethyl carbonate is added from the top and collected from the bottom of the glass tube. This process is repeated many times to remove formaldehyde from the dimethyl carbonate. During this process, dimethyl carbonate is easy to drip onto the workbench or the surface of the experimental equipment, which pollutes the experimental environment and wastes experimental materials. The existing technology has not solved this problem. Utility Model Content

[0004] The purpose of this invention is to provide a dimethyl carbonate raw material impurity filtration and purification device. By setting a rotating component, the glass tube can be rotated to repeatedly pass the dimethyl carbonate in two sets of spherical bottles through the glass tube. The activated carbon in the glass tube filters the formaldehyde multiple times. The whole process is carried out in a relatively sealed environment to avoid dimethyl carbonate leakage and pollution of the experimental environment, and also to prevent waste of experimental materials, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A dimethyl carbonate raw material impurity filtration and purification device includes a filter assembly, wherein the filter assembly includes a glass tube, positioning cotton sheets and activated carbon;

[0007] It also includes two sets of storage components, each including a spherical bottle, with a first sealing plug fixedly installed at the bottom of the spherical bottle. The first sealing plug is sealed and inserted into both ends of the glass tube, and a through hole is opened in the center of the first sealing plug.

[0008] It also includes a rotating component for rotating the filter assembly, the rotating component including a retaining ring fixedly installed in the middle of the glass tube, the retaining ring being rotatably connected to the rotating seat via a rotating shaft.

[0009] Preferably, two sets of limiting rings are fixedly installed at both ends of the glass tube, and positioning cotton pads are filled at both ends of the glass tube, with one side of the positioning cotton pads abutting against the limiting rings.

[0010] Preferably, the glass tube is filled with activated carbon, which is placed between two sets of positioning cotton pads.

[0011] Preferably, the top of the spherical bottle has a filling port, and a second sealing plug is inserted into the filling port.

[0012] Preferably, the second sealing plug has a pressure relief hole in the middle, and a sealing plug is inserted into the pressure relief hole.

[0013] Preferably, two sets of limiting plates are provided on both sides of the rotating seat, and the limiting plates are coaxially arranged and fixedly connected to the rotating shaft.

[0014] Preferably, the top of the rotating seat is threaded with a clamping screw, and the bottom of the clamping screw abuts against the rotating shaft.

[0015] Preferably, the rotating seat is fixedly installed on the top of the support column, and the bottom of the support column is fixedly connected to the base plate.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model features a simple and convenient rotating component that allows the glass tube to be rotated repeatedly, passing dimethyl carbonate from two sets of spherical flasks through the glass tube multiple times. The activated carbon in the glass tube then filters the formaldehyde multiple times, improving the filtration efficiency. Furthermore, the entire process is conducted in a relatively sealed environment, preventing dimethyl carbonate leakage from polluting the experimental environment and avoiding waste of experimental materials. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the glass tube;

[0020] Figure 3 This is a schematic diagram of the component structure.

[0021] Figure 4 for Figure 1 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Glass tube; 2. Positioning cotton pad; 3. Activated carbon; 4. Spherical bottle; 5. First sealing plug; 6. Through hole; 7. Fixing ring; 8. Rotating shaft; 9. Rotating seat; 10. Limiting ring; 11. Filling port; 12. Second sealing plug; 13. Pressure relief hole; 14. Sealing plug; 15. Limiting plate; 16. Tightening screw; 17. Support column; 18. Base plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-4 This utility model provides a technical solution:

[0025] A dimethyl carbonate raw material impurity filtration and purification device includes a filter assembly, which includes a glass tube 1, positioning cotton sheets 2, and activated carbon 3. Two sets of limiting rings 10 are fixedly installed at both ends of the glass tube 1. Positioning cotton sheets 2 are filled at both ends of the glass tube 1, with one side of the positioning cotton sheets 2 abutting against the limiting rings 10. Activated carbon 3 is filled inside the glass tube 1 and is disposed between the two sets of positioning cotton sheets 2. The activated carbon 3 is granular coconut shell activated carbon 3.

[0026] By setting up a filter assembly, its function is to remove formaldehyde impurities from dimethyl carbonate through physical adsorption. The glass tube 1 provides a relatively sealed filter channel and facilitates the storage of activated carbon 3. The two ends of the glass tube 1 are connected to the spherical bottle 4 through the first sealing plug 5 to form a closed circulation system to prevent dimethyl carbonate leakage. By setting a limiting ring 10, the positioning cotton pad 2 can be positioned to prevent activated carbon 3 from flowing into the spherical bottle 4 with dimethyl carbonate, thus avoiding secondary pollution. Activated carbon 3 can adsorb formaldehyde impurities, and the oxygen-containing functional groups on its surface can undergo a condensation reaction with formaldehyde to enhance the adsorption effect.

[0027] It also includes two sets of storage components. The storage components include a spherical bottle 4. A first sealing plug 5 is fixedly installed at the bottom of the spherical bottle 4. The first sealing plug 5 is sealed and inserted into both ends of the glass tube 1. A through hole 6 is opened in the center of the first sealing plug 5. A filling port 11 is opened at the top of the spherical bottle 4. A second sealing plug 12 is sealed and inserted into the filling port 11. A pressure relief hole 13 is opened in the middle of the second sealing plug 12. A sealing plug 14 is sealed and inserted into the pressure relief hole 13.

[0028] By setting up spherical bottles 4 as storage containers, a certain amount of dimethyl carbonate raw material can be easily accommodated. During the filtration process, two sets of spherical bottles 4 are used to store the dimethyl carbonate containing impurities to be filtered and the liquid after one filtration, respectively. The liquid reciprocates between the two sets of spherical bottles 4 through a rotating component, thereby performing multiple filtrations. The filling port 11 at the top of the spherical bottle 4 is used to add dimethyl carbonate raw material into the spherical bottle 4. The second sealing plug 12 can be tightly inserted into the filling port 11 to ensure that the spherical bottle 4 is in a sealed state when not being filled, preventing the liquid inside the spherical bottle 4 from evaporating or external impurities from entering the bottle, ensuring the airtightness and cleanliness of the storage environment. The first sealing plug 5 is fixedly installed at the bottom of the spherical bottle 4 and can be sealed and inserted into both ends of the glass tube 1, so that the spherical bottle 4 and the glass tube 1 form a relatively sealed whole system. Meanwhile, the first sealing plug 5 can be quickly disassembled and assembled with the glass tube 1, which facilitates cleaning of the inside of the glass tube 1 and cleaning or replacement of the activated carbon 3. The through hole 6 in the center of the first sealing plug 5 provides a channel for the flow of dimethyl carbonate between the spherical bottle 4 and the glass tube 1. At the same time, the sealing plug structure effectively prevents the liquid from leaking from the connection during the flow, ensuring that the entire filtration process is carried out in a sealed environment, which avoids pollution of the experimental environment and prevents waste of experimental materials. By opening a pressure relief hole 13 in the middle of the second sealing plug 12, the pressure relief hole 13 can be opened when necessary by pulling out the sealing plug 14 to balance the air pressure in the spherical bottle 4 and ensure the smooth progress of the filtration operation. When pressure relief is not required, the sealing plug 14 can seal the pressure relief hole 13 to maintain the sealed state of the spherical bottle 4.

[0029] It also includes a rotating assembly for rotating the filter assembly. The rotating assembly includes a fixing ring 7, which is fixedly installed in the middle of the glass tube 1. The fixing ring 7 is rotatably connected to the rotating seat 9 via a rotating shaft 8. Two sets of limiting plates 15 are respectively provided on both sides of the rotating seat 9. The limiting plates 15 are coaxially arranged and fixedly connected to the rotating shaft 8. A clamping screw 16 is threaded on the top of the rotating seat 9. The bottom of the clamping screw 16 abuts against the rotating shaft 8. The rotating seat 9 is fixedly installed on the top of the support column 17. The bottom of the support column 17 is fixedly connected to the base plate 18.

[0030] The rotating component facilitates the rotation and support of the filter assembly. The middle of the glass tube 1 is fixed by the fixing ring 7, and the rotating seat 9 is connected by the rotating shaft 8 to achieve flexible rotation. This allows the operator to manually rotate the glass tube 1. During rotation, the dimethyl carbonate in the two sets of spherical bottles 4 flows through the glass tube 1 repeatedly, making full contact with the internal activated carbon 3, achieving multiple filtrations of formaldehyde and effectively improving the purification effect. At the same time, the limiting plate 15 prevents the rotating shaft 8 from shaking or shifting during rotation, ensuring a stable and safe rotation process. The entire operation is carried out in a sealed environment, avoiding dimethyl carbonate leakage that pollutes the environment and wastes materials. The clamping screw 16 can clamp and fix the position of the rotating shaft 8 after rotation, thereby preventing the filter assembly from rotating accidentally during the filtration process.

[0031] In practical use, move the device to the designated position and seal the first sealing plug 5 to both ends of the glass tube 1, forming a closed system between the spherical bottle 4 and the glass tube 1. Add dimethyl carbonate raw material containing impurities into one of the spherical bottles 4 through the filling port 11 at the top of the spherical bottle 4 and the second sealing plug 12. The dimethyl carbonate flows downwards, flows into the glass tube 1 through the through hole 6 of the first sealing plug 5, undergoes initial filtration through the positioning cotton sheet 2 and the activated carbon 3 layer, and then enters the other spherical bottle 4. After observing that all the dimethyl carbonate has entered the other spherical bottle 4, turn the tightening screw. 16. Loosen the shaft 8, manually rotate the glass tube 1, and reverse the positions of the two sets of spherical bottles 4. Repeat this process multiple times to allow the dimethyl carbonate to circulate and filter between the two sets of spherical bottles 4, thereby improving the formaldehyde removal effect. If the air pressure inside the spherical bottle 4 is abnormal during the filtration process, the sealing plug 14 located at the top of the upper spherical bottle 4 can be pulled out, and the air pressure can be balanced through the pressure relief hole 13. After filtration is completed, the second sealing plug 12 located at the bottom of the lower spherical bottle 4 can be pulled out to pour out the purified dimethyl carbonate. Then, the first sealing plugs 5 at both ends of the glass tube 1 can be pulled out to clean or replace the activated carbon 3.

[0032] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dimethyl carbonate raw material impurity filtration and purification device, characterized in that: The filter assembly includes a glass tube (1), a positioning cotton sheet (2), and activated carbon (3); It also includes two sets of storage components, the storage components include a spherical bottle (4), the bottom of the spherical bottle (4) is fixedly installed with a first sealing plug (5), the first sealing plug (5) is sealed and inserted into both ends of the glass tube (1), and the first sealing plug (5) has a through hole (6) in the center; It also includes a rotating component for rotating the filter assembly, the rotating component including a fixing ring (7) fixedly installed in the middle of the glass tube (1), the fixing ring (7) being rotatably connected to the rotating seat (9) via a rotating shaft (8).

2. The dimethyl carbonate raw material impurity filtration and purification equipment according to claim 1, characterized in that: Two sets of limiting rings (10) are fixedly installed at both ends of the glass tube (1), and positioning cotton pads (2) are filled at both ends of the glass tube (1). One side of the positioning cotton pads (2) abuts against the limiting rings (10).

3. The dimethyl carbonate raw material impurity filtration and purification equipment according to claim 2, characterized in that: The glass tube (1) is filled with activated carbon (3), which is placed between two sets of positioning cotton pads (2).

4. The dimethyl carbonate raw material impurity filtration and purification equipment according to claim 1, characterized in that: The top of the spherical bottle (4) is provided with a filling port (11), and a second sealing plug (12) is inserted into the filling port (11).

5. The dimethyl carbonate raw material impurity filtration and purification equipment according to claim 4, characterized in that: The second sealing plug (12) has a pressure relief hole (13) in the middle, and a sealing plug (14) is inserted into the pressure relief hole (13).

6. The dimethyl carbonate raw material impurity filtration and purification equipment according to claim 1, characterized in that: Two sets of limiting plates (15) are respectively provided on both sides of the rotating seat (9). The limiting plates (15) are coaxially arranged and fixedly connected to the rotating shaft (8).

7. The dimethyl carbonate raw material impurity filtration and purification equipment according to claim 6, characterized in that: The top of the rotating seat (9) is threaded with a clamping screw (16), and the bottom of the clamping screw (16) abuts against the rotating shaft (8).

8. The dimethyl carbonate raw material impurity filtration and purification equipment according to claim 7, characterized in that: The rotating seat (9) is fixedly installed on the top of the support column (17), and the bottom of the support column (17) is fixedly connected to the base plate (18).

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