Dimethicone production device
By introducing a fixed-bed reactor and optimizing pipeline connections in the dimethyl silicone oil production unit, the problem of low yield caused by direct catalyst feeding in the polymerization reactor was solved, achieving efficient dimethyl silicone oil production and improving output and production stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HOSHINE SILICON (SHANSHAN) IND CO LTD
- Filing Date
- 2025-04-01
- Publication Date
- 2026-04-21
AI Technical Summary
Existing dimethyl silicone oil production equipment suffers from low yield, especially due to the low production efficiency caused by directly adding the catalyst into the polymerization reactor and the long catalyst replacement time, which affects product output and labor intensity.
By replacing the traditional polymerization reactor with a fixed-bed reactor, the catalyst comes into full contact with the cyclosiloxane and end-capping agent in the fixed-bed reactor. Through the connecting pipelines of the polymerization reactor, fixed-bed reactor, filter, intermediate tank, de-lowering device and finished product tank, the cyclosiloxane is fully polymerized and filtered, thereby increasing the output and reducing the labor intensity.
It increased the yield of dimethyl silicone oil, enabled continuous production, reduced the labor intensity of production, and improved product stability.
Smart Images
Figure CN224142199U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of dimethyl silicone oil production technology, and is a dimethyl silicone oil production device. Background Technology
[0002] Dimethyl silicone oil is an organosilicon polymer made from DMC (cyclosiloxane) as a raw material, combined with a specific catalyst, and produced through reactions such as heating, dehydration, polymerization, and dehydration. Dimethyl silicone oil has physiological inertness, good chemical stability, heat resistance, thermal conductivity, and low viscosity change with temperature. Due to its unique physicochemical properties, it is widely used in many fields such as daily chemicals, pharmaceuticals, and industrial production.
[0003] The existing dimethyl silicone oil production process involves heating and polymerizing raw materials such as DMC, end-capping agents, and catalysts in a polymerization reactor. In the current polymerization process, the dimethyl silicone oil unit uses a solid acid catalyst system for polymerization production. The catalyst is added directly to the polymerization reactor, and after polymerization, it is discharged through the bottom outlet. The pressing speed of the polymerization reactor is too slow, with a pressing time of 2 to 2.5 hours for a single batch (4.5 tons), resulting in the dimethyl silicone oil production capacity not meeting the design requirements. Moreover, since the catalyst is added directly to the polymerization reactor, changing the catalyst requires a handover and purging process for the polymerization reactor, which takes up to 12 hours. This production process involves excessive downtime for catalyst replacement, which is not only labor-intensive but also affects product output.
[0004] In summary, the low yield of dimethyl silicone oil has become a technical problem that is difficult for enterprises to solve. Summary of the Invention
[0005] This invention provides a dimethyl silicone oil production apparatus that overcomes the shortcomings of the prior art and effectively solves the problem of low yield in existing dimethyl silicone oil production apparatuses.
[0006] The technical solution of this utility model is achieved through the following measures: a dimethyl silicone oil production device, including a polymerization kettle, a fixed-bed reactor, a filter, an intermediate tank, a descaling device, and a finished product tank. A catalyst pipeline is fixedly connected to the lower inlet of the fixed-bed reactor. A polymerization pipeline is fixedly connected between the bottom outlet of the polymerization kettle and the bottom inlet of the fixed-bed reactor. A first filtration pipeline is fixedly connected between the top outlet of the fixed-bed reactor and the inlet of the filter. A buffer pipeline is fixedly connected between the filter outlet and the inlet of the intermediate tank. A descaling pipeline is fixedly connected between the outlet of the intermediate tank and the inlet of the descaling device. A finished product conveying pipeline is fixedly connected between the outlet of the descaling device and the inlet of the finished product tank. A loading pipeline is fixedly connected to the bottom outlet of the finished product tank.
[0007] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:
[0008] The above also includes a bag filter, with a second filter pipeline fixedly connected between the outlet of the de-lowering device and the top inlet of the bag filter, and a finished product conveying pipeline fixedly connected between the bottom outlet of the bag filter and the inlet of the finished product tank.
[0009] The aforementioned de-lowering device is a scraped evaporator. A de-lowering pipeline is fixedly connected between the outlet of the intermediate tank and the inlet of the scraped evaporator, and a second filtration pipeline is fixedly connected between the outlet of the scraped evaporator and the top inlet of the bag filter.
[0010] The first inlet at the top of the polymerization reactor is fixedly connected to a raw material pipeline, and the second inlet at the top of the polymerization reactor is fixedly connected to a sealing agent pipeline.
[0011] The top outlet of the aforementioned polymerization reactor is fixedly connected to a venting pipeline.
[0012] A spare polymerization pipeline is fixedly connected between the above-mentioned polymerization pipeline and the first filter pipeline.
[0013] A first control valve is fixedly installed on the aforementioned polymer backup pipeline.
[0014] A safety valve is fixedly installed on the aforementioned venting pipeline.
[0015] A second control valve is fixedly installed on the aforementioned catalyst pipeline.
[0016] The aforementioned device also includes a controller, and a first control valve and a second control valve are connected to the controller.
[0017] This invention has a reasonable and compact structure and is easy to use. It mixes cyclosiloxane and end-capping agent in a polymerization reactor and then feeds them into a fixed-bed reactor. In the fixed-bed reactor, a catalyst is used to catalyze the cyclosiloxane. The cyclosiloxane, end-capping agent and catalyst can fully contact each other in the fixed-bed reactor, resulting in a more complete polymerization reaction and increasing the yield of dimethyl silicone oil. Attached Figure Description
[0018] Appendix Figure 1 This is a schematic diagram of the process flow of this utility model.
[0019] Appendix Figure 1 The codes in the diagram are as follows: 1 for polymerization reactor, 2 for fixed-bed reactor, 3 for filter, 4 for intermediate tank, 5 for scraped evaporator, 6 for finished product tank, 7 for catalyst line, 8 for polymerization line, 9 for first filter line, 10 for buffer line, 11 for de-lowering line, 12 for finished product conveying line, 13 for charging line, 14 for bag filter, 15 for second filter line, 16 for raw material line, 17 for end-capping agent line, 18 for venting line, 19 for polymerization standby line, 20 for first control valve, 21 for safety valve, and 22 for second control valve. Detailed Implementation
[0020] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.
[0021] Unless otherwise specified, all equipment and devices used in this invention are existing, publicly known, and commonly used equipment and devices in the field.
[0022] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.
[0023] The present invention will be further described below with reference to the embodiments and accompanying drawings:
[0024] Example 1: As shown in the attached document Figure 1 As shown, the dimethyl silicone oil production apparatus includes a polymerization reactor 1, a fixed-bed reactor 2, a filter 3, an intermediate tank 4, a descaling device, and a finished product tank 6. A catalyst pipeline 7 is fixedly connected to the lower inlet of the fixed-bed reactor 2. A polymerization pipeline 8 is fixedly connected between the bottom outlet of the polymerization reactor 1 and the bottom inlet of the fixed-bed reactor 2. A first filtration pipeline 9 is fixedly connected between the top outlet of the fixed-bed reactor 2 and the inlet of the filter 3. A buffer pipeline 10 is fixedly connected between the outlet of the filter 3 and the inlet of the intermediate tank 4. A descaling pipeline 11 is fixedly connected between the outlet of the intermediate tank 4 and the inlet of the descaling device. A finished product conveying pipeline 12 is fixedly connected between the outlet of the descaling device and the inlet of the finished product tank 6. A charging pipeline 13 is fixedly connected to the bottom outlet of the finished product tank 6.
[0025] The above-mentioned dimethyl silicone oil production equipment can be further optimized and / or improved according to actual needs:
[0026] Example 2: Its difference from Example 1 is as follows: (See attached) Figure 1 As shown, the device also includes a bag filter 14, a second filter pipeline 15 is fixedly connected between the outlet of the de-sinking device and the top inlet of the bag filter 14, and a finished product conveying pipeline 12 is fixedly connected between the bottom outlet of the bag filter 14 and the inlet of the finished product tank 6.
[0027] Example 3: Its difference from Examples 1 to 2 is as follows: (See attached) Figure 1 As shown, the de-lowering device is a scraped evaporator 5. A de-lowering pipeline 11 is fixedly connected between the outlet of the intermediate tank 4 and the inlet of the scraped evaporator 5. A second filter pipeline 15 is fixedly connected between the outlet of the scraped evaporator 5 and the top inlet of the bag filter 14.
[0028] Example 4: Its difference from Examples 1 to 3 is as follows: (See attached) Figure 1The top first inlet of the polymerization reactor 1 is fixedly connected to the raw material pipeline 16, and the top second inlet of the polymerization reactor 1 is fixedly connected to the end-capping agent pipeline 17.
[0029] Example 5: It differs from Examples 1 to 4 in that, as shown in the appendix... Figure 1 As shown, the top outlet of the polymerization reactor 1 is fixedly connected to a venting pipeline 18.
[0030] Example 6: Its difference from Examples 1 to 5 is as follows: (See attached) Figure 1 As shown, a spare polymerization pipeline 19 is fixedly connected between the polymerization pipeline 8 and the first filter pipeline 9.
[0031] If material blockage occurs in polymerization pipeline 8 as needed, material can be supplied to fixed-bed reactor 2 through polymerization backup pipeline 19.
[0032] Example 7: Its difference from Examples 1 to 6 is as follows: (See attached) Figure 1 As shown, a first control valve 20 is fixedly installed on the polymer backup pipeline 19.
[0033] Example 8: It differs from Examples 1 to 7 in that: as shown in the appendix Figure 1 As shown, a safety valve 21 is fixedly installed on the vent line 18.
[0034] If required, when the working pressure of polymerization reactor 1 exceeds the maximum allowable working pressure, the pressure can be automatically released by safety valve 21.
[0035] Example 9: It differs from Examples 1 to 8 in that: as shown in the appendix Figure 1 As shown, a second control valve 22 is fixedly installed on the catalyst pipeline 7.
[0036] Example 10: It differs from Examples 1 to 9 in that, as shown in the appendix... Figure 1 As shown, the device also includes a controller, and the first control valve 20 and the second control valve 22 are connected to the controller.
[0037] As needed, the pipelines and equipment of this dimethyl silicone oil production unit can also be equipped with conventional valves, thermometers, and pressure gauges known in the art, according to production requirements. The controller is a PLC controller, and the model of the PLC controller can be: QPKT-0.9 (1900*1450*400). An EMERSON DeltaV system is installed within this PLC controller. TM Distributed Control System (DCS)
[0038] This invention involves mixing cyclosiloxane and end-capping agent in a polymerization reactor and then feeding the mixture into a fixed-bed reactor. In the fixed-bed reactor, a catalyst is used to catalyze the cyclosiloxane. The cyclosiloxane, end-capping agent, and catalyst can fully contact each other in the fixed-bed reactor, resulting in a more complete polymerization reaction, increased dimethyl silicone oil yield, reduced labor intensity, continuous production of dimethyl silicone oil, and better product stability.
[0039] The above technical features constitute various embodiments of the present invention, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.
[0040] The usage process of this utility model embodiment is as follows: First, cyclosiloxane raw material and end-capping agent are added to polymerization reactor 1 and mixed; then, the mixed material enters fixed bed reactor 2 through polymerization pipeline 8, and a catalyst is added to fixed bed reactor 2. The mixed material reacts under the action of the catalyst to generate dimethyl silicone oil; then, the dimethyl silicone oil enters filter 3 through first filter pipeline 9 for filtration, and the filtered dimethyl silicone oil enters intermediate tank 4 through buffer pipeline 10 for buffering; subsequently, the dimethyl silicone oil in intermediate tank 4 enters scraped evaporator 5 through de-lowering pipeline 11 for evaporation and de-lowering treatment; finally, the de-lowering treated dimethyl silicone oil enters bag filter 14 through second filter pipeline 15 for secondary filtration, and the filtered dimethyl silicone oil enters finished product tank 6 for storage through finished product conveying pipeline 12.
Claims
1. A dimethyl silicone oil production apparatus, characterized in that... The system includes a polymerization reactor, a fixed-bed reactor, a filter, an intermediate tank, a de-saturation device, and a finished product tank. A catalyst pipeline is fixedly connected to the lower inlet of the fixed-bed reactor. A polymerization pipeline is fixedly connected between the bottom outlet of the polymerization reactor and the bottom inlet of the fixed-bed reactor. A first filtration pipeline is fixedly connected between the top outlet of the fixed-bed reactor and the inlet of the filter. A buffer pipeline is fixedly connected between the filter outlet and the inlet of the intermediate tank. A de-saturation pipeline is fixedly connected between the outlet of the intermediate tank and the inlet of the de-saturation device. A finished product conveying pipeline is fixedly connected between the outlet of the de-saturation device and the inlet of the finished product tank. A feeding pipeline is fixedly connected to the bottom outlet of the finished product tank.
2. The dimethicone production apparatus according to claim 1, wherein It also includes a bag filter, with a second filter pipeline fixedly connected between the outlet of the de-lowering device and the top inlet of the bag filter, and a finished product conveying pipeline fixedly connected between the bottom outlet of the bag filter and the inlet of the finished product tank.
3. The dimethicone production apparatus according to claim 1 or 2, characterized by The de-lowering device is a scraped evaporator. A de-lowering pipeline is fixedly connected between the outlet of the intermediate tank and the inlet of the scraped evaporator. A second filtration pipeline is fixedly connected between the outlet of the scraped evaporator and the top inlet of the bag filter.
4. The dimethicone production apparatus according to claim 3, wherein The first inlet at the top of the polymerization reactor is fixedly connected to a raw material pipeline, and the second inlet at the top of the polymerization reactor is fixedly connected to a sealing agent pipeline.
5. The dimethicone production apparatus according to claim 4, wherein The top outlet of the polymerization reactor is fixedly connected to a venting pipeline.
6. The dimethicone production apparatus according to claim 1 or 2 or 4 or 5, characterized by A backup polymer pipeline is fixedly connected between the polymer pipeline and the first filter pipeline.
7. The dimethicone production apparatus according to claim 6, wherein A first control valve is fixedly installed on the polymer backup pipeline.
8. The dimethicone production apparatus according to claim 7, wherein A safety valve is fixedly installed on the venting pipeline.
9. The dimethicone production apparatus according to claim 7 or 8, characterized by A second control valve is fixedly installed on the catalyst pipeline.
10. The dimethicone production apparatus according to claim 9, wherein It also includes a controller, a first control valve, and a second control valve connected to the controller.