Refining and purifying integrated device for high-purity dimethyl sulfoxide

Abstract

The invention discloses a high-purity dimethyl sulfoxide refining and purifying integrated device which comprises a pretreatment mechanism, a rectification mechanism and a waste gas treatment mechanism, the pretreatment mechanism comprises a sieving box and a mixing box, a molecular sieve is installed in the sieving box, a mixing assembly is installed on the mixing box, a feeding pipe is arranged on the sieving box, and a discharging pipe is arranged on the mixing box. The sieving box and the mixing box are connected through a first connecting pipe, the rectification mechanism comprises a rectification tower, a condenser and a separator, the mixing box and the rectification tower are connected through a material conveying pipe, a water pump is installed on the material conveying pipe, the waste gas treatment mechanism comprises a first filter box and a second filter box, and the first filter box and the second filter box are connected through a pipeline. An exhaust assembly is arranged between the first filter box and the second filter box; when the dimethyl sulfoxide is refined and purified, the pretreatment mechanism plays a key role, so that the purity of the dimethyl sulfoxide is further increased, and the rigorous requirements of the high-end field on the quality of the dimethyl sulfoxide are met.

Description

Technical Field

[0001] The invention relates to the technical field of organic synthesis, and in particular to an integrated device for refining and purifying high-purity dimethyl sulfoxide. Background Art

[0002] Dimethyl sulfoxide (DMSO) is a versatile organic compound. Due to its high polarity, high boiling point, excellent thermal stability, and miscibility with aprotic solvents, it is widely used in a variety of fields, including medicine, chemicals, electronics, and agriculture. With the increasing demand for high-purity DMSO in these fields, its purification technology has become increasingly important.

[0003] In the related art, during the purification process, a heating device heats the raw material, causing it to reach its boiling point and subsequently vaporize. The vaporized dimethyl sulfoxide enters a condenser, which cools the hot gaseous dimethyl sulfoxide through heat exchange, causing it to recondense into a liquid state. The condensed liquid then flows into a specialized collection system where it is precisely separated by a separator, effectively separating high-purity dimethyl sulfoxide from low-boiling-point impurities, ensuring that the dimethyl sulfoxide meets high purity standards.

[0004] It is worth noting that dimethyl sulfoxide is extremely susceptible to moisture absorption during the synthesis and storage stages. Moisture is a key interfering factor in many chemical reaction processes and practical application scenarios, and is very likely to lead to deviations in reaction results or poor application effects. In addition, during the synthesis process, dimethyl sulfoxide may also be mixed with acidic impurities. These impurities will not only reduce the purity of dimethyl sulfoxide itself, but may also cause adverse consequences such as increased side reactions and deterioration of product performance in specific fields with strict purity requirements, such as fine chemical applications, pharmaceutical research and development, and material preparation, seriously affecting the use value and application scope of dimethyl sulfoxide. Therefore, we need to propose an integrated device for the refining and purification of high-purity dimethyl sulfoxide. Summary of the Invention

[0005] The object of the present invention is to provide an integrated device for refining and purifying high-purity dimethyl sulfoxide to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An integrated device for refining and purifying high-purity dimethyl sulfoxide, comprising:

[0008] A pretreatment mechanism, the pretreatment mechanism includes a screening box and a mixing box, the screening box is installed with a molecular sieve, the mixing box is installed with a mixing assembly, the screening box is provided with a feed pipe, and the screening box and the mixing box are connected by a first connecting pipe;

[0009] A distillation mechanism, wherein the distillation mechanism includes a distillation tower, a condenser, and a separator, wherein the distillation tower, the condenser, and the separator are connected by a second connecting pipe, and the mixing box and the distillation tower are connected by a feed pipe, and a water pump is installed on the feed pipe;

[0010] The waste gas treatment mechanism includes a first filter box and a second filter box, a placement frame is installed in the first filter box, activated carbon is provided in the placement frame, the first filter box and the distillation tower are connected by an exhaust pipe, the first filter box and the second filter box are connected by a third connecting pipe, and an exhaust assembly is provided between the first filter box and the second filter box.

[0011] Preferably, two fixing frames are installed in the screening box, and the molecular sieve is fixed between the two fixing frames.

[0012] Preferably, a first inspection port is provided on the screening box, a first inspection door is snap-connected to the first inspection port, a snap-fit plate is fixed on the first inspection door, and the snap-fit plate is snap-fitted into the first inspection port.

[0013] Preferably, a sealing ring is provided on the clamping plate, and the sealing ring is in contact with and connected to the screening box. A sealing gasket is provided on the clamping plate, and the sealing gasket is in contact with and connected to the molecular sieve.

[0014] Preferably, connecting plates are fixed on both sides of the first inspection door, mounting grooves are provided on both sides of the screening box, a reset spring is installed in the mounting groove, the other end of the reset spring is connected to an L-shaped plate, a triangular snap-fitting block is fixed on the L-shaped plate, a snap-fitting groove is provided on the connecting plate, the triangular snap-fitting block passes through the mounting groove and is engaged in the snap-fitting groove, and one end of the L-shaped plate passing through the mounting groove is connected to a push plate.

[0015] Preferably, the mixing assembly includes a mixing paddle and a servo motor, the mixing paddle is rotatably connected to the mixing box, the servo motor is mounted on the mixing box, and the output end of the servo motor is connected to the extended end of the mixing paddle that passes through the mixing box.

[0016] Preferably, a second inspection port is provided on the first filter box, and a second inspection door is installed at the second inspection port by means of mounting bolts.

[0017] Preferably, the exhaust assembly includes an outlet pipe, a circulation pipe and a gas detector, the outlet pipe is installed on the second filter box, the two ends of the circulation pipe are respectively connected to the first filter box and the outlet pipe, the gas detector is fixedly installed on the outlet pipe, the outlet pipe is fixedly installed with a first control valve, and the circulation pipe is fixedly installed with a second control valve.

[0018] Preferably, the mixing box, the first filter box and the second filter box are provided with feed channels, and the feed channels are threadedly connected with blocking covers.

[0019] Preferably, a third control valve is installed on the first connecting pipe and the second connecting pipe, and a one-way control valve is installed on the exhaust pipe and the third connecting pipe.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The pretreatment mechanism plays a key role in the refinement and purification of dimethyl sulfoxide in this invention. First, the raw material is dehydrated using molecular sieves, which precisely capture the water in the dimethyl sulfoxide and significantly reduce its water content. This treatment significantly enhances the chemical stability of the dimethyl sulfoxide, effectively avoiding the risk of hydrolysis and extending its shelf life and service life.

[0022] The raw materials then enter the mixing tank, where they are thoroughly mixed with alumina. Alumina's neutral to weak alkalinity allows it to react chemically with acidic impurities, converting them into harmless substances and achieving efficient removal. Furthermore, alumina's powerful adsorption capacity also captures other impurities in dimethyl sulfoxide, such as small organic molecules and metal ions, thereby comprehensively purifying the raw materials. Through advanced treatment with alumina, the purity of dimethyl sulfoxide is further enhanced, meeting the stringent quality requirements of high-end applications.

[0023] 2. The present invention can treat waste gas through the waste gas treatment mechanism to remove harmful substances therein, ensure that tail gas emissions meet environmental protection standards, minimize the potential pollution risk to the surrounding environment, effectively curb the spread of pollutants in the waste gas to the atmospheric environment, and reduce the negative impact on the surrounding air quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a schematic cross-sectional view of the present invention;

[0026] Figure 3 Schematic diagram of the cross-sectional structure of the distillation tower of the present invention;

[0027] Figure 4 It is a schematic cross-sectional structural diagram of the screening box of the present invention.

[0028] In the figure: 1, screening box; 2, mixing box; 3, molecular sieve; 4, feed pipe; 5, first connecting pipe; 6, distillation tower; 7, condenser; 8, separator; 9, second connecting pipe; 10, feed pipe; 11, water pump; 12, first filter box; 13, second filter box; 14, placement frame; 15, activated carbon; 16, exhaust pipe; 17, third connecting pipe; 18, fixing frame; 19, first inspection port; 20, first inspection door; 21, clamping plate; 22, sealing ring; 23, sealing Gasket; 24. Connecting plate; 25. Mounting slot; 26. Return spring; 27. L-shaped plate; 28. Triangular locking block; 29. Locking slot; 30. Push plate; 31. Mixing paddle; 32. Servo motor; 33. Second inspection port; 34. Mounting bolts; 35. Second inspection door; 36. Exhaust pipe; 37. Circulation pipe; 38. Gas detector; 39. First control valve; 40. Second control valve; 41. Feed channel; 42. Shielding cover; 43. Third control valve; 44. One-way control valve. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0030] Example 1:

[0031] See also Figures 1-4 , the present invention provides a technical solution:

[0032] An integrated device for refining and purifying high-purity dimethyl sulfoxide, comprising:

[0033] The pretreatment mechanism includes a screening box 1 and a mixing box 2. A molecular sieve 3 is installed in the screening box 1. Two fixed frames 18 are installed in the screening box 1. The molecular sieve 3 is fixed between the two fixed frames 18.

[0034] A mixing assembly is installed on the mixing box 2, and the mixing assembly includes a mixing paddle 31 and a servo motor 32. The mixing paddle 31 is rotatably connected to the mixing box 2. The servo motor 32 is installed on the mixing box 2, and the output end of the servo motor 32 is connected to the extended end of the mixing paddle 31 that passes through the mixing box 2. A feed pipe 4 is provided on the screening box 1, and the screening box 1 and the mixing box 2 are connected by a first connecting pipe 5.

[0035] The dimethyl sulfoxide raw material containing impurities is transported to the screening box 1 through the feed pipe 4. When the raw material enters the screening box 1, the molecular sieve 3 installed in the box begins to play a key role. The molecular sieve 3 has a strong adsorption capacity for water in dimethyl sulfoxide due to its unique microporous structure. Since the molecular sieve 3 is fixed between the two fixed frames 18, this fixing method not only ensures the stability of the molecular sieve 3 during operation, but also facilitates disassembly operations when replacement is required. When the raw material flows through the molecular sieve 3, water molecules are adsorbed and retained by the molecular sieve 3, thereby achieving dehydration of the raw material, effectively reducing the water content of dimethyl sulfoxide, improving its chemical stability, and laying a good foundation for subsequent refining and purification steps. The third control valve 43 is opened, and the raw material after dehydration flows to the mixing box 2 through the first connecting pipe 5 at the bottom of the screening box 1;

[0036] Start the servo motor 32, and its output end drives the mixing paddle 31 to rotate at high speed in the mixing box 2. The design of the mixing paddle 31 usually adopts a special blade shape and arrangement to achieve sufficient stirring and mixing of the materials in the box. At the same time, according to the predetermined process requirements, alumina and other impurity removers are added to the mixing box 2, and the cover 42 is opened. Alumina and other impurity removers enter the mixing box 2 through the feed channel 41. Alumina, with its neutral to weakly alkaline properties, reacts chemically with the acidic impurities in dimethyl sulfoxide under the strong stirring of the mixing paddle 31, and converts the acidic impurities into harmless compounds, thereby achieving effective removal of the acidic impurities. In addition, the strong adsorption properties of alumina can also capture other impurities such as small organic molecules and metal ions in dimethyl sulfoxide, purify the raw materials in all directions, further improve the purity of dimethyl sulfoxide, and meet the stringent requirements of high-end applications.

[0037] Furthermore, a first inspection port 19 is provided on the screening box 1, and a first inspection door 20 is engaged with the first inspection port 19. A clamping plate 21 is fixed to the first inspection door 20, and the clamping plate 21 is engaged in the first inspection port 19. A sealing ring 22 is provided on the clamping plate 21, and the sealing ring 22 is in contact with the screening box 1. A sealing gasket 23 is provided on the clamping plate 21, and the sealing gasket 23 is in contact with the molecular sieve 3.

[0038] Specifically, connecting plates 24 are fixed on both sides of the first inspection door 20, mounting grooves 25 are opened on both sides of the screening box 1, and a return spring 26 is installed in the mounting groove 25. The other end of the return spring 26 is connected to an L-shaped plate 27, and a triangular clamping block 28 is fixed on the L-shaped plate 27. A clamping groove 29 is opened on the connecting plate 24, and the triangular clamping block 28 passes through the mounting groove 25 and is clamped in the clamping groove 29. One end of the L-shaped plate 27 passing through the mounting groove 25 is connected to a push plate 30;

[0039] When disassembling the molecular sieve 3, first remove the first inspection door 20, press the push plate 30, which can push the L-shaped plate 27 to squeeze the return spring 26, and at the same time drive the triangular locking block 28 to move out of the locking groove 29, then pull the first inspection door 20 to remove it, and at the same time move the locking plate 21 out of the first inspection port 19, and then take the molecular sieve 3 out from between the two fixing frames 18;

[0040] When installing the molecular sieve 3, the molecular sieve 3 is clamped between the two fixing frames 18, and then the clamping plate 21 is aligned with the first inspection port 19. The connecting plates 24 on both sides of the first inspection door 20 are in contact with the inclined surfaces of the triangular clamping block 28. Then, the first inspection door 20 is pressed, and the connecting plates 24 squeeze the triangular clamping block 28. The triangular clamping block 28 squeezes the return spring 26 through the L-shaped plate 27. When the clamping plate 21 is completely clamped in the first inspection port 19, the return spring 26 releases its elastic potential energy to push the L-shaped plate 27, which can push the triangular clamping block 28 to engage in the clamping groove 29, and the first inspection door 20 can be fixedly installed.

[0041] The installation sealing performance of the first inspection door 20 can be improved by providing the sealing gasket 23 and the sealing ring 22 .

[0042] The distillation mechanism includes a distillation tower 6, a condenser 7 and a separator 8, and the distillation tower 6, the condenser 7 and the separator 8 are connected by a second connecting pipe 9, and the mixing box 2 and the distillation tower 6 are connected by a feed pipe 10, and a water pump 11 is installed on the feed pipe 10.

[0043] The dimethyl sulfoxide raw material treated by the pretreatment mechanism is temporarily stored in the mixing box 2. The water pump 11 on the feed pipe 10 is activated to generate power, transporting the dehydrated and impurity-removed dimethyl sulfoxide (DMSO) feedstock in the mixing tank 2 through the feed pipe 10 to the distillation tower 6. After the feedstock enters the distillation tower 6, the heating device at the bottom of the distillation tower 6 begins to operate, heating the feedstock. As the temperature gradually increases, the DMSO and its impurities reach their respective boiling points and vaporize. The vaporized vapor rises within the distillation tower 6. After separation in the distillation tower 6, the vapor at the top of the tower primarily contains low-boiling-point impurities and partially vaporized DMSO. The second control valve 40 is opened, and this vapor enters the condenser 7 through the second connecting pipe 9. After cooling, the vapor temperature drops below its boiling point, causing it to liquefy, transforming from a gaseous state to a liquid state. The second control valve 40 is opened, and the condensed liquid flows through the second connecting pipe 9 into the separator 8. The separator 8 separates the DMSO and the low-boiling-point impurities by utilizing differences in physical properties such as density and solubility. After separation, the high-purity DMSO and the separated impurities are collected separately.

[0044] Example 2:

[0045] The difference between this embodiment 2 and embodiment 1 is that:

[0046] The waste gas treatment mechanism includes a first filter box 12 and a second filter box 13. A placement frame 14 is installed in the first filter box 12, and activated carbon 15 is provided in the placement frame 14. The first filter box 12 and the distillation tower 6 are connected by an exhaust pipe 16, and the first filter box 12 and the second filter box 13 are connected by a third connecting pipe 17, and an exhaust assembly is provided between the first filter box 12 and the second filter box 13. A second inspection port 33 is provided on the first filter box 12, and a second inspection door 35 is installed at the second inspection port 33 through mounting bolts 34.

[0047] Specifically, the exhaust assembly includes an outlet pipe 36, a circulation pipe 37 and a gas detector 38. The outlet pipe 36 is installed on the second filter box 13. The two ends of the circulation pipe 37 are respectively connected to the first filter box 12 and the outlet pipe 36. The gas detector 38 is fixedly installed on the outlet pipe 36. A first control valve 39 is fixedly installed on the outlet pipe 36, and a second control valve 40 is fixedly installed on the circulation pipe 37.

[0048] Open the one-way control valve 44 on the exhaust pipe 16, and the exhaust gas is collected through the exhaust pipe 16 and transported to the first filter box 12. After entering the first filter box 12, the exhaust gas will first pass through the water in the box. The water can absorb some water-soluble substances in the exhaust gas, which can initially reduce the concentration of some pollutants in the exhaust gas and play a certain cooling role. After being washed with water, the exhaust gas continues to rise and contacts the activated carbon 15 placed in the placement frame 14. The activated carbon 15 has a rich pore structure and a huge specific surface area, which can adsorb organic impurities, odorous substances and some small molecular pollutants that are not absorbed by water in the exhaust gas. When the activated carbon 15 is saturated with adsorption, it can be replaced by removing the mounting bolts 34 and then opening the second inspection door 35 at the second inspection port 33.

[0049] Open the one-way control valve 44 on the third connecting pipe 17, and the exhaust gas after water washing and adsorption treatment by activated carbon 15 flows to the second filter box 13 through the third connecting pipe 17; the exhaust gas entering the second filter box 13 will come into contact with the catalyst in the box; the catalyst can accelerate the chemical reaction of some difficult-to-degrade pollutants in the exhaust gas and convert them into harmless or low-toxic substances; after catalytic treatment, the pollutants in the exhaust gas are further reduced, making it more likely to meet the emission standards; when the gas after catalytic treatment is discharged from the outlet pipe 36, the gas detector 38 installed on the outlet pipe 36 will detect the composition and concentration of the exhaust gas in real time; if the test results show that the pollutant content in the exhaust gas meets the emission standards, open the first control valve 39, close the second control valve 40, and the exhaust gas is directly discharged into the atmosphere through the outlet pipe 36; if the gas detector 38 detects that the pollutant content in the exhaust gas does not meet the emission standards, close the first control valve 39 and open the second control valve 40. At this time, the exhaust gas that does not meet the standards will flow back to the first filter box 12 through the circulation pipe 37, and will be washed with water and adsorbed by activated carbon 15 again until it meets the standards.

[0050] In Example 1 and Example 2, a feed channel 41 is provided on the mixing box 2, the first filter box 12 and the second filter box 13, a baffle 42 is threadedly connected to the feed channel 41, a third control valve 43 is installed on the first connecting pipe 5 and the second connecting pipe 9, and a one-way control valve 44 is installed on the exhaust pipe 16 and the third connecting pipe 17.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated 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 invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A high-purity dimethyl sulfoxide refining and purification integrated device, characterized in that: include: A pretreatment mechanism, the pretreatment mechanism comprising a screening box (1) and a mixing box (2), the screening box (1) being provided with a molecular sieve (3), the mixing box (2) being provided with a mixing assembly, the screening box (1) being provided with a feed pipe (4), the screening box (1) and the mixing box (2) being connected via a first connecting pipe (5); A distillation mechanism, the distillation mechanism comprising a distillation tower (6), a condenser (7) and a separator (8), wherein the distillation tower (6), the condenser (7) and the separator (8) are connected via a second connecting pipe (9), the mixing box (2) and the distillation tower (6) are connected via a feed pipe (10), and a water pump (11) is installed on the feed pipe (10); An exhaust gas treatment mechanism is disclosed, comprising a first filter box (12) and a second filter box (13); a placement frame (14) is installed in the first filter box (12); activated carbon (15) is provided in the placement frame (14); the first filter box (12) and the distillation tower (6) are connected via an exhaust pipe (16); the first filter box (12) and the second filter box (13) are connected via a third connecting pipe (17); and an exhaust assembly is provided between the first filter box (12) and the second filter box (13).

2. The integrated device for refining and purifying high-purity dimethyl sulfoxide according to claim 1, characterized in that: Two fixed frames (18) are installed in the screening box (1), and the molecular sieve (3) is fixed between the two fixed frames (18).

3. The integrated device for refining and purifying high-purity dimethyl sulfoxide according to claim 1, characterized in that: The screening box (1) is provided with a first inspection opening (19), the first inspection opening (19) is snap-connected with a first inspection door (20), a snap-fit plate (21) is fixed on the first inspection door (20), and the snap-fit plate (21) is snap-fitted into the first inspection opening (19).

4. The integrated device for refining and purifying high-purity dimethyl sulfoxide according to claim 3, characterized in that: A sealing ring (22) is provided on the clamping plate (21), and the sealing ring (22) is in contact with and connected to the screening box (1). A sealing gasket (23) is provided on the clamping plate (21), and the sealing gasket (23) is in contact with and connected to the molecular sieve (3).

5. The integrated device for refining and purifying high-purity dimethyl sulfoxide according to claim 4, characterized in that: Connecting plates (24) are fixedly provided on both sides of the first inspection door (20), mounting grooves (25) are provided on both sides of the screening box (1), a return spring (26) is installed in the mounting groove (25), the other end of the return spring (26) is connected to an L-shaped plate (27), a triangular engaging block (28) is fixed on the L-shaped plate (27), a engaging groove (29) is provided on the connecting plate (24), the triangular engaging block (28) passes through the mounting groove (25) and is engaged in the engaging groove (29), and one end of the L-shaped plate (27) passing through the mounting groove (25) is connected to a push plate (30).

6. The integrated device for refining and purifying high-purity dimethyl sulfoxide according to claim 1, characterized in that: The mixing assembly comprises a mixing paddle (31) and a servo motor (32). The mixing paddle (31) is rotatably connected to the mixing box (2). The servo motor (32) is mounted on the mixing box (2), and the output end of the servo motor (32) is connected to the extended end of the mixing paddle (31) that passes through the mixing box (2).

7. The integrated device for refining and purifying high-purity dimethyl sulfoxide according to claim 1, characterized in that: The first filter box (12) is provided with a second inspection port (33), and a second inspection door (35) is installed at the second inspection port (33) via mounting bolts (34).

8. The integrated device for refining and purifying high-purity dimethyl sulfoxide according to claim 1, characterized in that: The exhaust assembly comprises an outlet pipe (36), a circulation pipe (37) and a gas detector (38); the outlet pipe (36) is mounted on the second filter box (13); two ends of the circulation pipe (37) are respectively connected to the first filter box (12) and the outlet pipe (36); the gas detector (38) is fixedly mounted on the outlet pipe (36); a first control valve (39) is fixedly mounted on the outlet pipe (36); and a second control valve (40) is fixedly mounted on the circulation pipe (37).

9. The integrated device for refining and purifying high-purity dimethyl sulfoxide according to claim 1, characterized in that: The mixing box (2), the first filter box (12) and the second filter box (13) are provided with a feed channel (41), and a blocking cover (42) is threadedly connected to the feed channel (41).

10. The integrated device for refining and purifying high-purity dimethyl sulfoxide according to claim 1, characterized in that: A third control valve (43) is installed on the first connecting pipe (5) and the second connecting pipe (9), and a one-way control valve (44) is installed on the exhaust pipe (16) and the third connecting pipe (17).

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