Steam heating, rectifying and purifying equipment for acyloxy silane
By setting up a steam pressure reducing valve and temperature reduction and pressure reducing device in the acyloxysilane distillation equipment, the problem of unstable steam heat source temperature in traditional processes is solved, stable control of steam pressure and temperature is achieved, and distillation efficiency is improved and product quality.
Patent Information
- Application Number
- CN202420968037.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-07
AI Technical Summary
In the traditional acyloxysilane distillation process, the temperature of the thermal oil or steam heat source is unstable, resulting in temperature fluctuations in the still kettle, affecting product yield and quality, and the steam pressure changes frequently, making it difficult to control the reaction time and component content.
A steam heating and distillation purification equipment of acyloxy silane was designed. By setting up a steam pressure reducing valve, a temperature reduction and pressure reduction device and a steam regulating valve in the steam gas supply pipeline, the stable control of steam temperature and pressure is achieved to ensure the still kettle. stable heat source supply.
It improves distillation efficiency and product quality stability, simplifies operations, reduces polymerization risks, shortens distillation time, and improves product yield and quality.
Smart Images
Figure CN222304799U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of acyloxysilane purification, in particular to acyloxysilane steam heating distillation purification equipment. Background Art
[0002] Acyloxysilane is an important organosilane coupling agent that can undergo coupling reactions with inorganic materials, various synthetic resins, and rubber. It is widely used in coatings, rubber, plastics, paints, machinery, and other fields, playing the role of increasing viscosity, cross-adhesion, coupling, etc., and can increase the wear resistance and aging resistance of the product.
[0003] The acyloxysilane production process obtains products with a content of more than 98% through synthesis, dehydration and distillation. One of the traditional distillation processes is that the acyloxysilane distillation kettle uses 240℃ heat transfer oil as the heat source. The heat transfer oil enters from the bottom through the distillation kettle heating outer coil and exits from the upper part of the kettle body to realize circulation for heating the distillation kettle. However, the temperature of the heat transfer oil is high and the heat is concentrated. The crude acyloxy product in the distillation kettle is easily polymerized in the contact part with the kettle wall where the heat transfer oil transfers heat. This is especially reflected in the low liquid level in the tower kettle in the late stage of distillation. The tower kettle temperature is not well controlled, and the tower kettle material polymerizes into a viscous solid, which greatly affects the product yield and quality.
[0004] Another traditional distillation process is that the acyloxysilane distillation kettle uses 160°C steam as the heat source. The steam enters the distillation kettle through the upper part of the external heating coil, and is converted into steam condensate by heat exchange with the material in the tower kettle and discharged from the bottom of the distillation kettle to achieve circulating heating of the distillation kettle. However, industrial steam is often shared by many equipment areas in the factory, and the amount used fluctuates. The steam boiler is affected by changes in water quality and gas calorific value to produce steam pressure fluctuations, which will affect the pressure and temperature of the steam. The above will cause the temperature of the steam heat source of the acyloxysilane distillation kettle to be unstable and the temperature fluctuates frequently, resulting in problems such as long reaction time of acyloxysilane, difficult control of the content of low-boiling and high-boiling substances in the components, and unstable product yield. Utility Model Content
[0005] In order to solve the above technical problems, the utility model provides an acyloxysilane steam heating distillation purification equipment, which can increase or decrease the steam temperature according to production needs, ensure a stable steam heat source for the distillation kettle, stabilize the steam pressure and temperature, improve the distillation efficiency, stabilize the product quality, be easy to operate, and realize industrial production.
[0006] To achieve this technical purpose, the utility model adopts the following scheme:
[0007] A steam-heated distillation and purification device for acyloxysilane comprises a distillation kettle, wherein the distillation kettle is provided with a stirring device, an outer kettle heating coil is provided outside the distillation kettle, a steam supply pipeline is connected to the upper part of the kettle heating coil, the steam supply pipeline is connected to a 1.6MPa saturated steam pipeline, a steam pressure reducing valve, a temperature and pressure reducing device and a steam regulating valve are provided on the steam supply pipeline; and a steam condensate pipeline is connected to the lower part of the kettle heating coil.
[0008] Compared with the prior art, the beneficial effects of the utility model are:
[0009] The utility model provides a steam pressure reducing valve, a temperature reducing and pressure reducing device and a steam regulating valve on the steam supply pipeline, which can increase or decrease the steam temperature according to production requirements, ensure a stable steam heat source for the distillation kettle, stabilize the steam pressure and temperature, improve the distillation efficiency, stabilize the product quality, facilitate operation and realize industrialized production.
[0010] Furthermore, a pressure gauge is provided between the steam pressure reducing valve and the temperature and pressure reducing device, and a thermometer is provided between the steam regulating valve and the kettle body heating outer coil.
[0011] Furthermore, a steam trap and a condensate check valve are provided on the steam condensate pipeline. The condensate check valve can effectively prevent the steam condensate from flowing back and affecting the normal use of steam and equipment.
[0012] Furthermore, the temperature and pressure reduction device is connected to a steam condensate supply pipeline and a steam condensate return pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of a steam heating distillation purification device for acyloxysilane according to an embodiment of the utility model;
[0014] The markings in the figure are: 1. 1.6MPa saturated steam pipeline; 2. Steam pressure reducing valve; 3. Pressure gauge; 4. Temperature and pressure reducing device; 5. Steam regulating valve; 6. Thermometer; 7. Distillation kettle; 8. Stirring device; 9. Steam trap; 10. Condensate check valve; 11. Steam condensate pipeline; 12. Kettle body heating outer coil. DETAILED DESCRIPTION
[0015] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.
[0016] See also Figure 1The utility model provides an acyloxysilane steam heating distillation purification device, comprising a distillation kettle 7, the distillation kettle 7 is provided with a stirring device 8, the distillation kettle 7 is provided with a kettle heating outer coil 12 outside the distillation kettle 7, the upper part of the kettle heating outer coil 12 is connected with a steam supply pipeline, the steam supply pipeline is connected with a 1.6MPa saturated steam pipeline 1, the steam supply pipeline is provided with a steam pressure reducing valve 2, a pressure gauge 3, a temperature reduction and pressure reducing device 4, a steam regulating valve 5 and a thermometer 6, the temperature reduction and pressure reducing device 4 is connected with a steam condensate supply pipeline and a steam condensate return pipeline; the lower part of the kettle heating outer coil 12 is connected with a steam condensate pipeline 11, the steam condensate pipeline 11 is provided with a steam trap 9 and a condensate check valve 10 to prevent the steam condensate from flowing back.
[0017] The production process of the utility model is that 1.6MPa (G) saturated steam (204℃) in the factory is reduced to 0.6MPa (G) superheated steam through a steam pressure reducing valve 2, and then heat exchanged with shell-side hot water through a temperature reducing and pressure reducing device 4, the steam temperature drops, the hot water temperature rises, and the 0.6MPa superheated steam becomes 0.6MPa (G) saturated steam (164℃), and enters the distillation kettle 7 through a steam regulating valve 5 from the upper part of the outer coil 12 of the kettle body heating, providing a distillation heat source for the distillation kettle 7, the crude acyloxysilane is distilled and purified in the kettle, the product is output from the top of the tower, and the high non-material is discharged from the tower kettle to realize the distillation reaction. After heat exchange, the steam condensate is heated by the kettle body and enters the steam condensate pipeline 11 through the steam drain valve 9 for recycling. The condensate check valve 10 prevents the condensate in the pipe network system from flowing back to the coil. When the temperature of 0.6MPa (G) saturated steam (164℃) is low or high, the required steam temperature can be obtained through this steam pressure reduction system, the saturated steam pressure is stable, the heat source of the distillation kettle 7 is stable, the distillation reaction of acyloxysilane is improved, the polymerization risk is reduced, the product quality is stabilized, and the product yield is improved.
[0018] The utility model can provide saturated steam at any temperature in the range of 160°C-200°C for the distillation kettle 7, and the steam pressure is stable and will not be affected by the fluctuation of the steam pressure of the factory pipeline network, which changes the disadvantages of high temperature and easy polymerization caused by using heat transfer oil as a heat source in the traditional process. It is simple and easy to operate, and the required saturated steam can be obtained by adjusting the shell-side circulating hot water of the steam pressure reducing valve 2 and the temperature and pressure reducing device 4. The steam system heats up quickly, and the heat of the kettle wall will not be concentrated in a single place, which greatly improves the heating speed and evaporation amount of the distillation kettle 7. The distillation time is shortened by 30% compared with the past, and the unit output is effectively improved. Since the distillation temperature is controllable, the temperature range where acyloxysilane is easy to polymerize is avoided, which greatly improves the quality of the distillation product and the product yield.
[0019] Finally, it should be noted that the above-listed examples are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and modifications fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.
Claims
1. An acyloxysilane steam heating distillation purification device, comprising a distillation kettle (7), the distillation kettle (7) is provided with a stirring device (8), and the distillation kettle (7) is provided with a kettle body heating outer coil (12) outside, characterized in that: The upper portion of the kettle body heating outer coil (12) is connected to a steam supply pipeline, the steam supply pipeline is connected to a 1.6 MPa saturated steam pipeline (1), and a steam pressure reducing valve (2), a temperature and pressure reducing device (4) and a steam regulating valve (5) are provided on the steam supply pipeline; the lower portion of the kettle body heating outer coil (12) is connected to a steam condensate pipeline (11).
2. The acyloxysilane steam heating distillation purification equipment according to claim 1, characterized in that: A pressure gauge (3) is provided between the steam pressure reducing valve (2) and the temperature reducing and pressure reducing device (4), and a thermometer (6) is provided between the steam regulating valve (5) and the kettle body heating outer coil (12).
3. The acyloxysilane steam heating distillation purification equipment according to claim 1, characterized in that: A steam trap (9) and a condensate check valve (10) are provided on the steam condensate pipeline (11).
4. The acyloxysilane steam heating distillation purification equipment according to claim 1, characterized in that: The temperature and pressure reduction device (4) is connected to a steam condensate supply pipeline and a steam condensate return pipeline.