High-pressure reaction kettle for synthesizing polyaryletherketone

Abstract

The utility model provides a high-pressure reaction kettle for synthesizing polyaryletherketone. The high-pressure reaction kettle comprises a high-pressure reaction kettle body, a first condenser and a second condenser, and the high-pressure reaction kettle body is provided with a raw material inlet, a nitrogen inlet, a product outlet and a waste gas outlet; the first condenser is provided with a first gas inlet, a first gas outlet and a waste water outlet, and the first gas inlet is connected with the waste gas outlet; the second condenser is provided with a second gas inlet, a carbon dioxide outlet and a nitrogen outlet, and the second gas inlet is connected with the first gas outlet. By adopting the high-pressure reaction kettle disclosed by the utility model, the synthesis efficiency of polyaryletherketone can be effectively improved, the time cost and the production cost are reduced, and the emission of harmful substances in the environment is obviously reduced under the action of the first condenser and the second condenser, so that the high-pressure reaction kettle is higher in environmental protection safety.

Description

Technical Field

[0001] The utility model relates to the technical field of polyaryletherketone synthesis equipment, in particular to a high-pressure reactor for synthesizing polyaryletherketone. Background Art

[0002] Polyaryletherketone is an engineering plastic first developed and commercialized by ICI in the UK in the late 1970s and put into industrial production in 1987. Due to its excellent comprehensive properties such as high heat resistance grade, radiation resistance, corrosion resistance, good dimensional stability, and excellent electrical properties, it has been widely used in industries such as aerospace, electronic information, petrochemical, medical and health, and automotive after its introduction.

[0003] For example, in the existing synthesis technology of polyetheretherketone, the main product of polyaryletherketone, diphenyl sulfone is used as a solvent, 4,4'-difluorobenzophenone and hydroquinone are used as copolymerization reactants, and alkali metal carbonate is used as a salt-forming reactant. Under normal pressure conditions, it is polymerized through a certain temperature. However, at present, the preparation of polyaryletherketone under normal pressure has low production efficiency on the one hand, and uses more catalysts and other materials, resulting in higher production costs. On the other hand, some side reaction substances and a large amount of carbon dioxide are generated during the preparation of polyaryletherketone. If the above reaction by-products and carbon dioxide can be effectively recovered or treated, it will have very significant environmental protection significance. Summary of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems in the existing technology to some extent. For this reason, an object of the utility model is to provide a high-pressure reactor for synthesizing polyaryletherketone.

[0005] The utility model provides a high-pressure reactor for synthesizing polyaryletherketone. According to an embodiment of the utility model, the high-pressure reactor for synthesizing polyaryletherketone includes:

[0006] A high-pressure reactor body, which is provided with a raw material inlet, a nitrogen inlet, a product outlet, and an exhaust gas outlet;

[0007] A first condenser, which is provided with a first gas inlet, a first gas outlet, and a waste water outlet, and the first gas inlet is connected to the exhaust gas outlet;

[0008] A second condenser, which is provided with a second gas inlet, a carbon dioxide outlet, and a nitrogen outlet, and the second gas inlet is connected to the first gas outlet.

[0009] The high-pressure reactor for synthesizing polyaryletherketone according to the above embodiments of the present utility model includes a high-pressure reactor body, a first condenser, and a second condenser. The high-pressure reactor body is provided with a raw material inlet, a nitrogen inlet, a product outlet, and a waste gas outlet. The raw materials for synthesizing polyaryletherketone are injected into the high-pressure reactor body through the raw material inlet. After closing the raw material inlet, the nitrogen inlet is opened, and nitrogen is continuously introduced into the high-pressure reactor body to increase the pressure inside the high-pressure reactor body. At a certain temperature, the raw materials react to prepare polyaryletherketone. Through the above high-pressure reactor, the reaction rate can be significantly increased under high temperature and high pressure, and polyaryletherketone can also be prepared without using a catalyst or using a small amount of catalyst. Therefore, not only the production efficiency of polyaryletherketone is significantly improved, the time cost is reduced, but also the input of materials is reduced, and the production cost is lowered.

[0010] The waste gas generated from the above reaction is discharged from the waste gas outlet of the high-pressure reactor body. The above waste gas includes a large amount of carbon dioxide, water, and a small amount of reaction by-products. The first condenser is provided with a first gas inlet, a first gas outlet, and a waste water outlet. The first gas inlet is connected to the waste gas outlet. The above waste gas enters the first condenser. Under the action of the first condenser, water is condensed, and some harmful by-products dissolved in water are also dissolved in the condensed water. The condensed waste water is discharged and collected from the waste water outlet. The second condenser is provided with a second gas inlet, a carbon dioxide outlet, and a nitrogen outlet. The second gas inlet is connected to the first gas outlet. The waste gas after the waste water is removed enters the second condenser from the first gas outlet and the second gas inlet. Under the action of the second condenser, carbon dioxide is condensed, discharged and collected from the carbon dioxide outlet, and nitrogen is discharged to the environment from the nitrogen outlet.

[0011] In addition, the high-pressure reactor for synthesizing polyaryletherketone according to the above embodiments of the present utility model further has the following technical features:

[0012] In some embodiments of the present utility model, a stirring paddle is provided inside the high-pressure reactor body.

[0013] In some embodiments of the present utility model, the stirring paddle is connected to a speed reducer and a motor.

[0014] In some embodiments of the present utility model, the stirring paddle includes at least one of an anchor-type stirring paddle, a frame-type stirring paddle, and a pitched-blade turbine stirring paddle.

[0015] In some embodiments of the present utility model, the waste water outlet is connected to a waste water storage tank.

[0016] In some embodiments of the present utility model, the carbon dioxide outlet is connected to a carbon dioxide compression and liquefaction recovery device.

[0017] In some embodiments of the present utility model, a constant pressure regulating valve is provided at the nitrogen outlet.

[0018] In some embodiments of the present utility model, a torque sensor is provided inside the high-pressure reactor body.

[0019] In some embodiments of the present utility model, a high-temperature medium storage layer is provided on the outer periphery of the high-pressure reactor body.

[0020] In some embodiments of the present utility model, a high-temperature medium inlet is provided at the lower end of the high-temperature medium storage layer, and a high-temperature medium outlet is provided at the upper end of the high-temperature medium storage layer.

[0021] In some embodiments of the present utility model, the high-temperature medium inlet and the high-temperature medium outlet are respectively located on opposite side walls of the high-temperature medium storage layer.

[0022] In some embodiments of the present utility model, the raw material inlet, the nitrogen inlet and the waste gas outlet are located at the top of the high-pressure reactor body.

[0023] In some embodiments of the present utility model, the product outlet is located at the bottom of the high-pressure reactor body.

[0024] The present utility model has at least the following technical effects:

[0025] (1) By using the high-pressure reactor of the present utility model, the synthesis efficiency of polyaryletherketone can be effectively improved, the reaction time can be shortened, and the time cost and production cost can be reduced.

[0026] (2) Under the action of the first condenser and the second condenser, the high-pressure reactor of the present utility model significantly reduces the emission of harmful substances in the environment and has higher environmental protection and safety. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of a high-pressure reactor for synthesizing polyaryletherketone according to an embodiment of the present utility model. Detailed Embodiments

[0029] Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0030] The present utility model provides a high-pressure reactor for synthesizing polyaryletherketone. According to an embodiment of the present utility model, with reference to Figure 1 , the high-pressure reactor for synthesizing polyaryletherketone includes: a high-pressure reactor body 100, a first condenser 200, and a second condenser 300.

[0031] According to an embodiment of the present utility model, the high-pressure reactor body 100 is provided with a raw material inlet 101, a nitrogen inlet 102, a product outlet 103, and an exhaust gas outlet 104. The raw materials for synthesizing polyaryletherketone are injected into the high-pressure reactor body 100 through the raw material inlet 101. After closing the raw material inlet 101, the nitrogen inlet 102 is opened, and nitrogen is continuously introduced into the high-pressure reactor body 100 to discharge the air in the reactor and increase the pressure in the high-pressure reactor body 100. At a certain temperature, the raw materials react to prepare polyaryletherketone, and the prepared polyaryletherketone is discharged from the high-pressure reactor body 100 through the product outlet 103. Through the above high-pressure reactor, the reaction rate can be significantly increased under high temperature and high pressure, the reaction time can be shortened, and polyaryletherketone can be prepared without using a catalyst or using a small amount of catalyst. Therefore, not only the production efficiency of polyaryletherketone is significantly improved, the time cost is reduced, but also the input of materials is reduced, and the production cost is lowered.

[0032] According to an embodiment of the present utility model, a stirring paddle 105 is provided inside the high-pressure reactor body 100. By providing the stirring paddle 105, the materials can be fully stirred, so that the materials are heated more evenly, which is beneficial to the smooth progress of the reaction. Further, the stirring paddle 105 includes but is not limited to at least one of an anchor-type stirring paddle, a frame-type stirring paddle, and a pitched-blade turbine stirring paddle.

[0033] According to an embodiment of the present utility model, the stirring paddle 105 is connected to a speed reducer 107 and a motor 106. The motor 106 drives the stirring paddle 105 to rotate, and the speed reducer 107 can reduce the rotation frequency of the stirring paddle 105 to control the stirring paddle 105 to operate within the required speed range.

[0034] According to an embodiment of the present utility model, a torque sensor 108 is provided inside the high-pressure reactor body 100. The reaction process is monitored through the torque sensor 108, and the discharging time is determined according to the viscosity value of the torque sensor 108. For example, it is appropriate to discharge when the pressure inside the high-pressure reactor body 100 is reduced to 30 psi. If the viscosity of the materials inside the high-pressure reactor body 100 is too high, the pressure can be adjusted up to 100 psi for discharging.

[0035] According to an embodiment of the present utility model, a high-temperature medium storage layer 109 is provided on the outer periphery of the high-pressure reactor body 100. By introducing a high-temperature medium, such as hot oil, into the high-temperature medium storage layer 109, the materials inside the high-pressure reactor body 100 can be heated.

[0036] According to an embodiment of the present utility model, a high-temperature medium inlet 110 is provided at the lower end of the high-temperature medium storage layer 109, and a high-temperature medium outlet 111 is provided at the upper end of the high-temperature medium storage layer 109. The high-temperature medium enters the high-temperature medium storage layer 109 from the high-temperature medium inlet 110, and the high-temperature medium flows from bottom to top, which can fully improve the heat transfer efficiency, and then flows out from the high-temperature medium outlet 111.

[0037] According to an embodiment of the present utility model, the high-temperature medium inlet 110 and the high-temperature medium outlet 111 are respectively located on the opposite side walls of the high-temperature medium storage layer 109. Thereby, the heat conduction performance of the high-temperature medium can be improved.

[0038] According to an embodiment of the present utility model, the raw material inlet 101, the nitrogen inlet 102 and the waste gas outlet 104 are located at the top end of the high-pressure reactor body 100. Further, the product outlet 103 is located at the bottom end of the high-pressure reactor body 100.

[0039] It should be noted that the size and shape of the high-pressure reactor body 100 can be selected according to the actual situation, and the high-pressure reactor body 100 with a cylindrical shape is preferably selected.

[0040] According to an embodiment of the present utility model, the first condenser 200 is provided with a first gas inlet 201, a first gas outlet 202 and a waste water outlet 203, and the first gas inlet 201 is connected to the waste gas outlet 104. The waste gas obtained from the reaction in the high-pressure reactor body 100 is discharged from the waste gas outlet 104 of the high-pressure reactor body 100. The waste gas includes a large amount of carbon dioxide, water and a small amount of reaction by-products. The waste gas enters the first condenser 100, and under the action of the first condenser 100, the waste water is condensed, and some harmful by-products dissolved in water are also dissolved in the condensed water. The condensed waste water is discharged and collected from the waste water outlet 203.

[0041] According to an embodiment of the present utility model, the waste water outlet 203 is connected to the waste water storage tank 400. The condensed waste water is discharged from the waste water outlet 203 and collected in the waste water storage tank 400 for subsequent centralized treatment.

[0042] According to an embodiment of the present utility model, the second condenser 300 is provided with a second gas inlet 301, a carbon dioxide outlet 302 and a nitrogen outlet 303, and the second gas inlet 301 is connected to the first gas outlet 202. The waste gas after the waste water is removed enters the second condenser 300 from the first gas outlet 202 and the second gas inlet 301. Under the action of the second condenser 300, the carbon dioxide is condensed, discharged and collected from the carbon dioxide outlet 302, and the nitrogen is discharged to the environment from the nitrogen outlet 303.

[0043] According to an embodiment of the present utility model, a constant pressure regulating valve 304 is provided at the nitrogen outlet 303. The constant pressure regulating valve 304 can be adjusted according to the pressure in the high-pressure reactor body 100. For example, when the pressure in the high-pressure reactor body 100 is relatively high, the constant pressure regulating valve 304 opens the nitrogen outlet 303 to discharge nitrogen, thereby ensuring a suitable reaction pressure in the high-pressure reactor body 100 and facilitating the smooth progress of the reaction.

[0044] According to an embodiment of the present utility model, the carbon dioxide outlet 302 is connected to a carbon dioxide compression and liquefaction recovery device 500. By compressing the carbon dioxide discharged from the carbon dioxide outlet 302 through the carbon dioxide compression and liquefaction recovery device 500, on the one hand, the carbon dioxide emissions in the environment are reduced, and on the other hand, the compressed carbon dioxide is convenient for transportation and can be used as a raw material in other production fields.

[0045] As an example, a 5000L high-pressure reactor is used. Various raw materials required for synthesizing polyaryletherketone are put into the high-pressure reactor body 100 through the raw material inlet 101. High-purity nitrogen is introduced through the nitrogen inlet 102, and the pressure of the constant pressure regulating valve 304 is adjusted to 76 psi, and the stirring paddle 105 is started. When the temperature in the high-pressure reactor body 100 reaches 180 °C, the pressure in the high-pressure reactor body 100 has been maintained at 76 psi. The temperature is slowly increased to 320 °C at a heating rate of 1 °C / min, and the rotation speed of the stirring paddle 105 is maintained at 60 revolutions per minute during this period. During the reaction, wastewater is recovered from the wastewater outlet 203 of the first condenser 200. The wastewater outlet 203 is externally connected to a wastewater storage tank 400. Carbon dioxide is recovered from the carbon dioxide outlet 302 of the second condenser 300. The carbon dioxide outlet 302 is externally connected to a carbon dioxide compression and liquefaction recovery device 500, and high-purity nitrogen is discharged from the nitrogen outlet 303. When the reaction temperature reaches 320 °C, the reaction time is determined according to the value of the torque sensor 108. When the reaction is over, heating is stopped, the stirring speed is continuously maintained at 60 revolutions per minute, the pressure of the constant pressure regulating valve 304 is adjusted to 30 psi, and the product outlet 103 is opened for discharging. The discharging temperature can be 260 - 320 °C.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. However, such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A high-pressure reactor for synthesizing polyaryletherketone, characterized in that, Comprising: A high-pressure reactor body, which is provided with a raw material inlet, a nitrogen inlet, a product outlet and an exhaust gas outlet; A first condenser, which is provided with a first gas inlet, a first gas outlet and a waste water outlet, and the first gas inlet is connected to the exhaust gas outlet; A second condenser, which is provided with a second gas inlet, a carbon dioxide outlet and a nitrogen outlet, and the second gas inlet is connected to the first gas outlet.

2. The high-pressure reactor for synthesizing polyaryletherketone according to claim 1, wherein, A stirring paddle is arranged inside the high-pressure reactor body; and / or, The stirring paddle includes at least one of an anchor-type stirring paddle, a frame-type stirring paddle and a pitched-blade turbine stirring paddle.

3. The high-pressure reactor for synthesizing polyaryletherketone according to claim 2, wherein The stirring paddle is connected to a speed reducer and a motor.

4. The high-pressure reactor for synthesizing polyaryletherketone according to claim 1 or 2, characterized in that, The waste water outlet is connected to a waste water storage tank; and / or, The carbon dioxide outlet is connected to a carbon dioxide compression and liquefaction recovery device; and / or, A constant pressure regulating valve is arranged at the nitrogen outlet.

5. The high-pressure reactor for synthesizing polyaryletherketone according to claim 1 or 2, characterized in that, A torque sensor is arranged inside the high-pressure reactor body.

6. The high-pressure reactor for synthesizing polyaryletherketone according to claim 1 or 2, characterized in that, A high-temperature medium storage layer is arranged on the outer periphery of the high-pressure reactor body.

7. The high-pressure reactor for synthesizing polyaryletherketone according to claim 6, characterized in that, A high-temperature medium inlet is arranged at the lower end of the high-temperature medium storage layer, and a high-temperature medium outlet is arranged at the upper end of the high-temperature medium storage layer.

8. The high-pressure reactor for synthesizing polyaryletherketone according to claim 7, characterized in that, The high-temperature medium inlet and the high-temperature medium outlet are respectively located on the opposite side walls of the high-temperature medium storage layer.

9. The high-pressure reactor for synthesizing polyaryletherketone according to claim 1, characterized in that, The raw material inlet, the nitrogen inlet and the exhaust gas outlet are located at the top end of the high-pressure reactor body.

10. The high-pressure reactor for synthesizing polyaryletherketone according to claim 1 or 9, characterized in that, The product outlet is located at the bottom end of the high-pressure reactor body.

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