A production system of colorless and odorless decamethylcyclopentasiloxane

Abstract

The utility model discloses a kind of production systems of colorless and odorless decamethylcyclopentasiloxane, including discharge pipe and the first storage tank communicated with it, the discharge outlet of first storage tank is connected with adsorber by first communicating pipe, active carbon adsorption subassembly is installed in adsorber, the discharge outlet of adsorber is connected with second storage tank by second communicating pipe, the discharge outlet of second storage tank is connected with dryer by third communicating pipe, drying layer subassembly is installed in dryer, the discharge outlet of dryer is connected with third storage tank by fourth communicating pipe, the discharge outlet of third storage tank is connected with filter by fifth communicating pipe, filter basket subassembly is installed in filter, the discharge outlet of filter is connected with finished product storage tank by sixth communicating pipe.This system not only can eliminate the peculiar smell of decamethylcyclopentasiloxane, also can reduce the colority, moisture and impurity of decamethylcyclopentasiloxane, and low operating cost, can guarantee the stable operation of system.

Description

Technical Field

[0001] This utility model belongs to the field of organosilicon production and processing technology, specifically relating to a production system for colorless and odorless decamethylcyclopentasiloxane. Background Technology

[0002] In the production of organosilicon, decamethylcyclopentasiloxane is an important organosilicon product with a wide range of applications. Besides its use as a conditioning agent and carrier in cosmetics and personal care products, it is also widely used in industrial applications such as lubricants, softeners, waterproofing agents, anti-sticking agents, defoamers, and solvents to improve product performance and stability. Furthermore, decamethylcyclopentasiloxane can be used as a dyeing medium. Hot-melt dyeing methods using decamethylcyclopentasiloxane as a medium can be performed without any auxiliaries, using pure disperse dyes with high dye uptake and good dyeing evenness. In addition, decamethylcyclopentasiloxane is also an important intermediate monomer, which can be used with end-capping agents such as hexamethyldisiloxane for ring-opening copolymerization to prepare silicone oils, silicone rubbers, and silicone resins. Currently, decamethylcyclopentasiloxane, after being purified from hydrolyzed siloxanes, is generally processed by removing high-boiling-point substances using a de-boiling tower. The resulting decamethylcyclopentasiloxane is then stored and sold directly. However, this de-boiling-point treatment results in insufficient stability and low purity due to the presence of aldehydes or olefins in the decamethylcyclopentasiloxane. Furthermore, the de-boiling-point product is prone to off-odors or discoloration, frequently leading to customer complaints and returns, severely impacting economic efficiency. Therefore, developing a production system for colorless and odorless decamethylcyclopentasiloxane with a rationally designed process, low operating costs, stable operation, and significantly improved product purity is objectively necessary. Summary of the Invention

[0003] The purpose of this invention is to provide a production system with reasonable process design, low operating cost, stable operation, and the ability to eliminate the odor of decamethylcyclopentasiloxane and reduce its color.

[0004] The purpose of this utility model is achieved as follows: it includes a discharge pipe and a first storage tank connected to it. The discharge port of the first storage tank is connected to an adsorber via a first connecting pipe. An activated carbon adsorption component is installed inside the adsorber. The discharge port of the adsorber is connected to a second storage tank via a second connecting pipe. The discharge port of the second storage tank is connected to a dryer via a third connecting pipe. A drying layer component is installed inside the dryer. The discharge port of the dryer is connected to a third storage tank via a fourth connecting pipe. The discharge port of the third storage tank is connected to a filter via a fifth connecting pipe. A filter basket component is installed inside the filter. The discharge port of the filter is connected to a finished product storage tank via a sixth connecting pipe. Control valves are installed on the first, second, third, fourth, fifth, and sixth connecting pipes.

[0005] Compared with existing technologies, the advantages of this system are: First, based on the characteristics of decamethylcyclopentasiloxane, an adsorber, dryer, and filter structure are designed. The activated carbon adsorption component in the adsorber can deodorize and decolorize aldehydes or olefins entrained in decamethylcyclopentasiloxane, eliminating both the odor and reducing the color. The drying layer component in the dryer can dry and adsorb the moisture contained in decamethylcyclopentasiloxane, reducing its moisture content and extending its shelf life. The filter basket component in the filter can filter out minute impurities in decamethylcyclopentasiloxane, reducing the moisture content of the decamethylcyclopentasiloxane. The system effectively reduces the impurities in decamethylcyclopentasiloxane, improving product quality. The combined use of the adsorber, dryer, and filter significantly reduces the odor, color, moisture, and impurities of decamethylcyclopentasiloxane, resulting in a significant increase in product purity. Furthermore, the activated carbon adsorption assembly, drying layer assembly, and filter basket assembly have low operating costs. Secondly, the three storage tanks can store the decamethylcyclopentasiloxane entering the adsorber, dryer, and filter. This ensures a uniform flow rate of decamethylcyclopentasiloxane into these components, guaranteeing stable system operation. It also facilitates the cleaning or replacement of the activated carbon adsorption assembly, drying layer assembly, and filter basket assembly. This system boasts advantages such as reasonable process design, low operating costs, stable operation, and consistent product quality, making it easy to promote and use. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the adsorber 4 in this utility model; Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle; Figure 4 This is a schematic diagram of the structure of the dryer 8 in this utility model; In the diagram: 1-Discharge pipe, 2-First storage tank, 3-First connecting pipe, 4-Adsorber, 41-Upper support plate, 42-Lower support plate, 43-Adsorption pipe, 44-Liquid outlet, 45-Activated carbon, 46-Liquid guide hole, 47-Liquid inlet pipe, 48-Liquid inlet tray, 49-Branch pipe, 5-Second connecting pipe, 6-Second storage tank, 7-Third connecting pipe, 8-Dryer, 81-Upper grid, 82-Lower grid, 83-Drying layer, 84-Adding port, 85-Discharge port, 86-Straight pipe, 87-Liquid collection tank, 88-Horizontal pipe, 9-Filter, 91-Mounting plate, 92-Filter basket body, 10-Fourth connecting pipe, 11-Third storage tank, 12-Fifth connecting pipe, 13-Sixth connecting pipe, 14-Finished product storage tank. Detailed Implementation

[0007] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0008] like Figures 1-4 As shown, this utility model includes a discharge pipe 1 and a first storage tank 2 connected thereto. The discharge port of the first storage tank 2 is connected to an adsorber 4 via a first connecting pipe 3. An activated carbon adsorption assembly is installed inside the adsorber 4. The discharge port of the adsorber 4 is connected to a second storage tank 6 via a second connecting pipe 5. The discharge port of the second storage tank 6 is connected to a dryer 8 via a third connecting pipe 7. A drying layer assembly is installed inside the dryer 8. The discharge port of the dryer 8 is connected to a third storage tank 11 via a fourth connecting pipe 10. The third storage tank 11... The discharge port is connected to a filter 9 via a fifth connecting pipe 12. A filter basket assembly is installed inside the filter 9. The discharge port of the filter 9 is connected to a finished product storage tank 14 via a sixth connecting pipe 13. Control valves are installed on the first connecting pipe 3, the second connecting pipe 5, the third connecting pipe 7, the fourth connecting pipe 10, the fifth connecting pipe 12, and the sixth connecting pipe 13. The first storage tank 2, the second storage tank 6, the third storage tank 11, and the finished product storage tank 14 are low-pressure storage tanks used in the prior art, equipped with corresponding pressure valves, safety valves, and other safety devices.

[0009] The system operates as follows: During use, all control valves on the first connecting pipe 3, second connecting pipe 5, third connecting pipe 7, fourth connecting pipe 10, fifth connecting pipe 12, and sixth connecting pipe 13 are opened. The decamethylcyclopentasiloxane, after de-elution treatment, first enters the first storage tank 2 through the discharge pipe 1. The decamethylcyclopentasiloxane in the first storage tank 2 then enters the adsorber 4 through the first connecting pipe 3. The activated carbon adsorption component in the adsorber 4 can adsorb aldehydes or olefins entrained in the decamethylcyclopentasiloxane. The material undergoes deodorization and decolorization treatment, which eliminates the odor of decamethylcyclopentasiloxane and reduces its color. After deodorization and decolorization treatment, the decamethylcyclopentasiloxane enters the second storage tank 6 through the second connecting pipe 5. The decamethylcyclopentasiloxane in the second storage tank 6 then enters the dryer 8 through the third connecting pipe 7. The drying layer component in the dryer 8 can dry and adsorb the moisture contained in the decamethylcyclopentasiloxane, reducing its moisture content and extending its shelf life. The storage time of siloxane is as follows: after dehydration, decamethylcyclopentasiloxane enters the third storage tank 11 through the fourth connecting pipe 10. The decamethylcyclopentasiloxane in the third storage tank 11 then enters the filter 9 through the fifth connecting pipe 12. The filter basket assembly in the filter 9 can filter out small impurities in the decamethylcyclopentasiloxane, reducing the impurity content of the decamethylcyclopentasiloxane and improving the quality of the product. The combined use of the adsorber 4, dryer 8 and filter 9 in this system can significantly reduce the odor, color, moisture and impurities of decamethylcyclopentasiloxane, significantly improve the purity of the product, and has low operating costs. At the same time, the first storage tank 2, the second storage tank 6 and the third storage tank 11 can store the decamethylcyclopentasiloxane entering the adsorber 4, dryer 8 and filter 9. On the one hand, it can ensure that the flow rate of decamethylcyclopentasiloxane entering the adsorber 4, dryer 8 and filter 9 is uniform, ensuring the stable operation of the system. On the other hand, it can facilitate the cleaning or replacement of the activated carbon adsorption assembly, drying layer assembly and filter basket assembly.

[0010] Furthermore, the activated carbon adsorption assembly includes an upper support plate 41, a lower support plate 42, and an adsorption tube 43. The upper support plate 41 and the lower support plate 42 are installed vertically and horizontally within the adsorber 4. The upper support plate 41 has multiple mounting holes, and the upper surface of the lower support plate 42 has a slot. A base plate is installed at the bottom of the adsorption tube 43. Liquid outlet holes 44 are evenly distributed on the lower wall of the adsorption tube 43. The adsorption tube 43 is filled with activated carbon 45. The upper end of the adsorption tube 43 is inserted into the slot and can be detachably mounted on the upper support plate 41 after passing through the mounting hole. Multiple liquid guiding holes 46 are machined on the lower support plate 42 outside the adsorption tube 43. A liquid inlet assembly is installed in the adsorber 4 above the activated carbon adsorption assembly. Before use, activated carbon 45 is loaded into the adsorption tube 43, and then the adsorption tube 43 is inserted between the upper support plate 41 and the lower support plate 42 and fixed. When decamethylcyclopentasiloxane enters the adsorber 4, it will enter each of the tubes. Inside the adsorption tube 43, after adsorption treatment by activated carbon 45, the purpose of deodorization and decolorization can be achieved. The deodorized and decolorized decamethylcyclopentasiloxane is discharged from the liquid outlet 44 at the bottom of the adsorption tube 43 and collects on the lower support plate 42. Then it flows into the bottom of the adsorber 4 through the liquid guide hole 46. Preferably, in order to ensure that the decamethylcyclopentasiloxane entering the adsorber 4 can enter each adsorption tube 43 evenly, the liquid inlet assembly includes a liquid inlet pipe 47 and a liquid inlet plate 48. One end of the liquid inlet pipe 47 The first connecting pipe 3 is connected to the first inlet pipe 47, and the other end of the inlet pipe 47 is connected to the inlet plate 48. The inlet plate 48 has a hollow internal structure. The bottom of the inlet plate 48 is provided with multiple branch pipes 49 corresponding to the adsorption pipes 43. The decamethylcyclopentasiloxane enters into the inlet pipe 47, and after being evenly distributed through the inlet plate 48, it flows out through the branch pipes 49. This ensures that the decamethylcyclopentasiloxane entering the adsorber 4 is evenly distributed on the upper support plate 41, and then enters each adsorption pipe 43.

[0011] Furthermore, the drying layer assembly includes an upper grid 81 and a lower grid 82, which are installed vertically spaced within the dryer 8. A drying layer 83 is filled between the upper grid 81 and the lower grid 82. The desiccant used in the drying layer 83 is one or a mixture of two of silica gel desiccant and molecular sieve desiccant. Silica gel desiccant and molecular sieve desiccant have advantages such as high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength. They are mainly used for moisture absorption and moisture prevention, thereby removing moisture from decamethylcyclopentasiloxane in the drying layer. A filling port 84 is installed on the upper dryer 8 of the drying layer 83, and a discharge port 85 is installed on the lower dryer 8 of the drying layer 83. The filling port 84 and discharge port 85 are provided to facilitate the replacement of the desiccant used in the drying layer 83. Both the filling port 84 and discharge port 85 are existing technologies and are equipped with corresponding flange covers, quick-opening handles and other components. Preferably, in order to avoid the desiccant from mixing into the decamethylcyclopentasiloxane and affecting the quality of the product, a mesh is provided on the top surface of both the upper grid 81 and the lower grid 82. The mesh can be arranged in one or two layers according to the needs of use.

[0012] Furthermore, in order to ensure that decamethylcyclopentasiloxane makes uniform contact with the drying layer inside the dryer, a liquid distributor is installed inside the dryer 8 above the drying layer assembly. The liquid distributor includes a straight pipe 86 and a liquid collection tank 87. One end of the straight pipe 86 is connected to the third connecting pipe 7, and the other end of the straight pipe 86 is connected to the liquid collection tank 87. Multiple horizontal pipes 88 are evenly distributed at the bottom of the liquid collection tank 87. The ends of the horizontal pipes 88 are fitted with sealing plates, and multiple distribution holes are machined at equal intervals at the bottom of the horizontal pipes 88. After the decamethylcyclopentasiloxane first enters the liquid collection tank 87 through the straight pipe 86, it will flow evenly into each horizontal pipe 88, and then flow out evenly through the distribution holes at the bottom of the horizontal pipes 88. In this way, the decamethylcyclopentasiloxane can be evenly distributed on the drying layer 83.

[0013] Furthermore, the filter basket assembly includes a filter basket body 92 and a mounting plate 91. The mounting plate 91 is installed at an angle inside the filter 9. A central through hole is machined at the center of the mounting plate 91. The filter basket body 92 is detachably mounted on the mounting plate 91 after passing through the central through hole. The outlet of the fifth connecting pipe 12 is located on the filter 9 above the mounting plate 91. The inlet of the sixth connecting pipe 13 is installed on the filter 9 below the mounting plate 91. The decamethylcyclopentasiloxane entering the filter 9 first enters the filter basket body 92. After being filtered by the filter basket body 92, the impurities are retained in the filter basket body 92. The decamethylcyclopentasiloxane passes through the filter basket body 92 and is discharged through the sixth connecting pipe 13. After a period of use, only the filter basket body 92 needs to be cleaned for reuse.

Claims

1. A production system for colorless and odorless decamethylcyclopentasiloxane, characterized in that: The system includes a discharge pipe (1) and a first storage tank (2) connected thereto. The discharge port of the first storage tank (2) is connected to an adsorber (4) via a first connecting pipe (3). An activated carbon adsorption assembly is installed inside the adsorber (4). The discharge port of the adsorber (4) is connected to a second storage tank (6) via a second connecting pipe (5). The discharge port of the second storage tank (6) is connected to a dryer (8) via a third connecting pipe (7). A drying layer assembly is installed inside the dryer (8). The discharge port of the dryer (8) is connected to a third connecting pipe (7). The four connecting pipes (10) are connected to the third storage tank (11). The outlet of the third storage tank (11) is connected to the filter (9) through the fifth connecting pipe (12). The filter (9) is equipped with a filter basket assembly. The outlet of the filter (9) is connected to the finished product storage tank (14) through the sixth connecting pipe (13). Control valves are installed on the first connecting pipe (3), the second connecting pipe (5), the third connecting pipe (7), the fourth connecting pipe (10), the fifth connecting pipe (12), and the sixth connecting pipe (13).

2. The production system for colorless and odorless decamethylcyclopentasiloxane according to claim 1, characterized in that: The activated carbon adsorption assembly includes an upper support plate (41), a lower support plate (42), and an adsorption tube (43). The upper support plate (41) and the lower support plate (42) are installed at intervals in the adsorber (4). Multiple mounting holes are machined on the upper support plate (41). A slot is installed on the upper surface of the lower support plate (42). A base plate is installed at the bottom of the adsorption tube (43). Liquid outlet holes (44) are evenly distributed on the tube wall at the lower end of the adsorption tube (43). Activated carbon (45) is filled in the adsorption tube (43). The lower end of the adsorption tube (43) is inserted into the slot. The upper end of the adsorption tube (43) is detachably installed on the upper support plate (41) after passing through the mounting hole. Multiple liquid guiding holes (46) are machined on the lower support plate (42) outside the adsorption tube (43). A liquid inlet assembly is installed in the adsorber (4) above the activated carbon adsorption assembly.

3. The production system for colorless and odorless decamethylcyclopentasiloxane according to claim 2, characterized in that: The liquid inlet assembly includes a liquid inlet pipe (47) and a liquid inlet tray (48). One end of the liquid inlet pipe (47) is connected to the first connecting pipe (3), and the other end of the liquid inlet pipe (47) is connected to the liquid inlet tray (48). The liquid inlet tray (48) has a hollow internal structure, and multiple branch pipes (49) corresponding to the adsorption pipe (43) are provided at the bottom of the liquid inlet tray (48).

4. The production system for colorless and odorless decamethylcyclopentasiloxane according to claim 1, characterized in that: The drying layer assembly includes an upper grid (81) and a lower grid (82), which are installed vertically spaced within the dryer (8). A drying layer (83) is filled between the upper grid (81) and the lower grid (82). An inlet (84) is installed on the dryer (8) above the drying layer (83), and a discharge port (85) is installed on the dryer (8) below the drying layer (83).

5. The production system for colorless and odorless decamethylcyclopentasiloxane according to claim 4, characterized in that: Both the upper grille (81) and the lower grille (82) are provided with mesh on their top surfaces.

6. The production system for colorless and odorless decamethylcyclopentasiloxane according to claim 1, characterized in that: A liquid distributor is installed in the dryer (8) above the drying layer assembly. The liquid distributor includes a straight pipe (86) and a liquid collection tank (87). One end of the straight pipe (86) is connected to a third connecting pipe (7), and the other end of the straight pipe (86) is connected to the liquid collection tank (87). Multiple horizontal pipes (88) are evenly distributed on the lower part of the liquid collection tank (87). A sealing plate is installed at the end of the horizontal pipe (88), and multiple distribution holes are processed at equal intervals on the bottom of the horizontal pipe (88).

7. The production system for colorless and odorless decamethylcyclopentasiloxane according to claim 1, characterized in that: The filter basket assembly includes a filter basket body (92) and a mounting plate (91). The mounting plate (91) is installed at an angle inside the filter (9). A central through hole is machined at the center of the mounting plate (91). The filter basket body (92) is detachably installed on the mounting plate (91) after passing through the central through hole. The outlet of the fifth connecting pipe (12) is located on the filter (9) above the mounting plate (91). The inlet of the sixth connecting pipe (13) is installed on the filter (9) below the mounting plate (91).

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