Preparation method of fluorine-containing polymer
The preparation process of fluoropolymers was optimized by using condensation, separation, and detection technologies, which solved the problem of monitoring reaction conditions and improved monomer purity and polymer performance.
Patent Information
- Application Number
- CN202510782269.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-12
- Publication Date
- 2025-11-04
AI Technical Summary
In the existing technology for preparing fluoropolymers, it is not convenient to monitor and optimize the reaction conditions in real time, and the purity of the monomers cannot be guaranteed, resulting in insufficient performance.
The monomers are condensed and separated using condensers and distillers, impurities are removed using adsorbents and activated carbon, purity is monitored in real time using a flame ionization detector, and reaction conditions are optimized by controlling temperature, pressure, and time.
Real-time monitoring and optimization of reaction conditions were achieved, improving monomer purity and thus enhancing the performance of fluoropolymers.
Smart Images
Figure CN120888017A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of fluorine-containing polymer preparation, and in particular to a fluorine-containing polymer preparation method. BACKGROUND
[0002] The fluorine-containing polymer is a kind of high molecular compound containing carbon-fluorine bond, and has excellent heat resistance, chemical corrosion resistance, low friction coefficient and non-stick properties. Common fluorine-containing polymers include polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), fluorine rubber (FKM) and the like, and the preparation methods usually include emulsion polymerization, suspension polymerization, solution polymerization and bulk polymerization.
[0003] In the prior art, the fluorine-containing polymer is not convenient to monitor and optimize the reaction conditions in real time during preparation, and the monomer purity cannot be guaranteed, thereby causing insufficient performance of the fluorine-containing polymer. Therefore, the fluorine-containing polymer preparation method is proposed to solve the above problems. SUMMARY
[0004] The application aims to solve the problems in the prior art that the fluorine-containing polymer is not convenient to monitor and optimize the reaction conditions in real time during preparation, and the monomer purity cannot be guaranteed, thereby causing insufficient performance of the fluorine-containing polymer, and proposes a fluorine-containing polymer preparation method.
[0005] The fluorine-containing polymer preparation method provided in the application adopts the following technical scheme:
[0006] A fluorine-containing polymer preparation method comprises the following steps:
[0007] S1: reacting hydrogen fluoride and ethylene to obtain a fluorine-containing monomer, and purifying the fluorine-containing monomer;
[0008] S2: adding the fluorine-containing monomer into a reaction kettle for polymerization reaction;
[0009] S3: adding a catalyst into the reaction kettle, and controlling the reaction temperature and pressure;
[0010] S4: monitoring and recording the reaction process to obtain a fluorine-containing polymer;
[0011] S5: adding a terminating agent into the reaction kettle to terminate the reaction;
[0012] S6: washing, drying and granulating the obtained fluorine-containing polymer to obtain a fluorine-containing polymer product;
[0013] S7: monitoring the purity of the fluorine-containing polymer product, and optimizing the reaction conditions.
[0014] Further, in the S1, hydrogen fluoride and ethylene are added to the reaction kettle by the adding mechanism, and a catalyst is added for reaction, the reaction temperature is 200-300 DEG C, the reaction pressure is 10-30 Pa, and the gaseous fluorine-containing monomer is prepared by reaction.
[0015] Further, in the S1, the gaseous fluorine-containing monomer is condensed by the condenser, the liquid fluorine-containing monomer is distilled and separated by the distiller, and the trace impurities in the liquid fluorine-containing monomer are removed by the adsorbent and the activated carbon.
[0016] Further, in the S2 and S3, the purified fluorine-containing monomer is added to the reaction kettle by the adding mechanism, and a catalyst and an initiator are added to the reaction kettle, the fluorine-containing monomer, the catalyst and the initiator are stirred and mixed by the mixing mechanism, the temperature and the pressure of the reaction kettle are controlled by the controller, the reaction temperature of the reaction kettle is 200-300 DEG C, the reaction pressure is 4-12 Pa, and the reaction time is 1-3 h.
[0017] Further, in the S4, the real-time temperature, the pressure and the reaction time of the reaction kettle are monitored in real time by the temperature sensor, the pressure sensor and the monitoring device, and the monitored data are recorded by the data recording device, and the fluorine-containing polymer is obtained by reaction.
[0018] Further, in the S5, the temperature of the reaction kettle is monitored by the temperature sensor, and after the reaction of the reaction kettle is completed, the temperature is gradually reduced, and the terminator is added to the reaction kettle by the adding mechanism to stop the polymerization reaction.
[0019] Further, in the S6, the obtained fluorine-containing polymer is washed by the washing device, the washing solvent is dilute hydrochloric acid, the concentration of the dilute hydrochloric acid is 1-5%, the washing temperature is 20-60 DEG C, and the washing time is 30-120 min.
[0020] Further, in the S6, the fluorine-containing polymer after washing is dried by the vacuum drying box, the drying temperature is 40-80 DEG C, the vacuum degree is 20-100 Pa, and the drying time is 10-20 h.
[0021] Further, in the S6, the fluorine-containing polymer after drying is crushed into granular by the crushing device, and the crushed fluorine-containing polymer is screened by the screening mechanism to obtain the fluorine-containing polymer finished product with uniform particle size.
[0022] Further, in the S7, the purity of the prepared fluorine-containing polymer finished product is detected by the flame ionization detector, the detector column temperature is 50-250 DEG C, the carrier gas is helium, and the detection result is analyzed, and the reaction conditions are optimized according to the analysis result.
[0023] In summary, the present application has at least one of the following beneficial technical effects:
[0024] 1. The scheme condenses gaseous fluorine-containing monomers through a condenser, distills and separates liquid fluorine-containing monomers through a distiller, removes trace impurities in the liquid fluorine-containing monomers by using an adsorbent and activated carbon, thereby effectively ensuring monomer purity and further improving the performance of fluorine-containing polymers.
[0025] 2. The scheme can detect the purity of the prepared fluorine-containing polymer product through a flame ionization detector, analyze the detection results, and optimize the reaction conditions according to the analysis results, thereby achieving the purpose of real-time monitoring and optimization of the reaction conditions.
[0026] The present application can facilitate real-time monitoring and optimization of reaction conditions during preparation, and can effectively improve the performance of fluorine-containing polymers by purifying monomers. BRIEF DESCRIPTION OF DRAWINGS
[0027] Figure 1 A flowchart of a preparation method of a fluorine-containing polymer is provided. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.
[0029] Embodiment One
[0030] Reference Figure 1 A preparation method of a fluorine-containing polymer includes the following steps:
[0031] S1: reacting hydrogen fluoride and ethylene to prepare fluorine-containing monomers, and purifying the fluorine-containing monomers;
[0032] S2: adding the fluorine-containing monomers to a reaction kettle for polymerization reaction;
[0033] S3: adding a catalyst to the reaction kettle, and controlling the reaction temperature and pressure;
[0034] S4: monitoring and recording the reaction process to obtain fluorine-containing polymers;
[0035] S5: adding a terminating agent to the reaction kettle to terminate the reaction;
[0036] S6: washing, drying, and granulating the obtained fluorine-containing polymers to obtain fluorine-containing polymer products;
[0037] S7: monitoring the purity of the fluorine-containing polymer products, and optimizing the reaction conditions.
[0038] In this embodiment, in S1, hydrogen fluoride and ethylene are added to the reaction kettle through the adding mechanism, and a catalyst is added for reaction, the reaction temperature is 200°C, the reaction pressure is 10 Pa, and gaseous fluorine-containing monomers are prepared by reaction. The gaseous fluorine-containing monomers are condensed by a condenser, and the liquid fluorine-containing monomers are distilled and separated by a distiller. The trace impurities in the liquid fluorine-containing monomers are removed by using an adsorbent and activated carbon.
[0039] In this embodiment, in S2 and S3, the purified fluorine-containing monomers are added to the reaction kettle through the adding mechanism, and a catalyst and an initiator are added to the reaction kettle. The fluorine-containing monomers, the catalyst, and the initiator are stirred and mixed by a mixing mechanism. The temperature and the pressure of the reaction kettle are controlled by a controller. The reaction temperature of the reaction kettle is 200°C, the reaction pressure is 4 Pa, and the reaction time is 1 h.
[0040] In this embodiment, in S4, the real-time temperature, pressure, and reaction time of the reaction kettle are monitored in real time by a temperature sensor, a pressure sensor, and a monitoring device. The monitored data are recorded by a data recording device. The fluorine-containing polymer is obtained by reaction.
[0041] In this embodiment, in S5, the temperature of the reaction kettle is monitored by a temperature sensor. After the reaction of the reaction kettle is completed, the temperature is gradually reduced, and a terminating agent is added to the reaction kettle through the adding mechanism to stop the polymerization reaction.
[0042] In this embodiment, in S6, the obtained fluorine-containing polymer is washed by a washing device. The washing solvent is dilute hydrochloric acid, the concentration of the dilute hydrochloric acid is 1%, the washing temperature is 20°C, and the washing time is 30 min. The washed fluorine-containing polymer is dried by a vacuum drying box. The drying temperature is 40°C, the vacuum degree is 20 Pa, and the drying time is 10 h. The dried fluorine-containing polymer is crushed into granular form by a crushing device. The crushed fluorine-containing polymer is screened by a screening mechanism to obtain a uniform particle size of the finished fluorine-containing polymer product.
[0043] In this embodiment, in S7, the purity of the prepared fluorine-containing polymer product is detected by a flame ionization detector. The column temperature of the detector is 50-250°C, and the carrier gas is helium. The detection results are analyzed, and the reaction conditions are optimized according to the analysis results.
[0044] Example Two
[0045] Reference Figure 1 A method for preparing a fluorine-containing polymer, comprising the following steps:
[0046] S1: reacting hydrogen fluoride and ethylene to prepare fluorine-containing monomers, and purifying the fluorine-containing monomers;
[0047] S2: adding the fluorine-containing monomers to a reaction kettle for polymerization reaction;
[0048] S3: adding a catalyst into the reaction kettle and controlling the reaction temperature and pressure;
[0049] S4: monitoring and recording the reaction process to obtain the fluorine-containing polymer;
[0050] S5: adding a terminator into the reaction kettle to terminate the reaction;
[0051] S6: washing, drying and granulating the obtained fluorine-containing polymer to obtain the fluorine-containing polymer product;
[0052] S7: monitoring the purity of the fluorine-containing polymer product and optimizing the reaction conditions.
[0053] In this embodiment, in S1, hydrogen fluoride and ethylene are added into the reaction kettle through the adding mechanism, and a catalyst is added for reaction, the reaction temperature is 220°C, the reaction pressure is 15 Pa, and the gaseous fluorine-containing monomer is prepared by reaction. The gaseous fluorine-containing monomer is condensed by a condenser, and the liquid fluorine-containing monomer is distilled and separated by a distiller. The trace impurities in the liquid fluorine-containing monomer are removed by using the adsorbent and activated carbon.
[0054] In this embodiment, in S2 and S3, the purified fluorine-containing monomer is added into the reaction kettle through the adding mechanism, and a catalyst and an initiator are added into the reaction kettle. The fluorine-containing monomer, the catalyst and the initiator are stirred and mixed by the mixing mechanism. The temperature and pressure of the reaction kettle are controlled by the controller. The reaction temperature of the reaction kettle is 220°C, the reaction pressure is 6 Pa, and the reaction time is 1.5 h.
[0055] In this embodiment, in S4, the real-time temperature, pressure and reaction time of the reaction kettle are monitored in real time by the temperature sensor, the pressure sensor and the monitoring device, and the monitored data are recorded by the data recording device. The fluorine-containing polymer is obtained by reaction.
[0056] In this embodiment, in S5, the temperature of the reaction kettle is monitored by the temperature sensor. After the reaction of the reaction kettle is completed, the temperature is gradually reduced, and a terminator is added into the reaction kettle by the adding mechanism to stop the polymerization reaction.
[0057] In this embodiment, in S6, the obtained fluorine-containing polymer is washed by the washing device, the washing solvent is dilute hydrochloric acid, the concentration of the dilute hydrochloric acid is 2%, the washing temperature is 30°C, and the washing time is 50 min. The washed fluorine-containing polymer is dried by the vacuum drying box, the drying temperature is 50°C, the vacuum degree is 40 Pa, and the drying time is 12 h. The dried fluorine-containing polymer is crushed into granular by the crushing device, and the crushed fluorine-containing polymer is screened by the screening mechanism to obtain the fluorine-containing polymer product with uniform particle size.
[0058] In this embodiment, in S7, the purity of the prepared fluorine-containing polymer product is detected by a flame ionization detector, the detector column temperature is 50-250°C, the carrier gas is helium, and the detection results are analyzed, and the reaction conditions are optimized according to the analysis results.
[0059] Example Three
[0060] Reference Figure 1 A method for preparing a fluorine-containing polymer, comprising the following steps:
[0061] S1: reacting hydrogen fluoride and ethylene to prepare a fluorine-containing monomer, and purifying the fluorine-containing monomer;
[0062] S2: adding the fluorine-containing monomer to a reaction kettle for polymerization reaction;
[0063] S3: adding a catalyst to the reaction kettle, and controlling the reaction temperature and pressure;
[0064] S4: monitoring and recording the reaction process to obtain a fluorine-containing polymer;
[0065] S5: adding a terminating agent to the reaction kettle to terminate the reaction;
[0066] S6: washing, drying, and granulating the obtained fluorine-containing polymer to obtain a fluorine-containing polymer product;
[0067] S7: monitoring the purity of the fluorine-containing polymer product, and optimizing the reaction conditions.
[0068] In this embodiment, in S1, hydrogen fluoride and ethylene are added to the reaction kettle by an adding mechanism, and a catalyst is added for reaction, the reaction temperature is 250°C, the reaction pressure is 20 Pa, a gaseous fluorine-containing monomer is prepared by reaction, the gaseous fluorine-containing monomer is condensed by a condenser, the liquid fluorine-containing monomer is distilled and separated by a distiller, and trace impurities in the liquid fluorine-containing monomer are removed by using an adsorbent and activated carbon.
[0069] In this embodiment, in S2 and S3, the purified fluorine-containing monomer is added to the reaction kettle by an adding mechanism, a catalyst and an initiator are added to the reaction kettle, the fluorine-containing monomer, the catalyst, and the initiator are stirred and mixed by a mixing mechanism, the temperature and pressure of the reaction kettle are controlled by a controller, the reaction temperature of the reaction kettle is 250°C, the reaction pressure is 8 Pa, and the reaction time is 2 h.
[0070] In this embodiment, in S4, the real-time temperature, pressure, and reaction time of the reaction kettle are monitored in real time by a temperature sensor, a pressure sensor, and a monitoring device, and the monitored data are recorded by a data recording device, and a fluorine-containing polymer is obtained by reaction.
[0071] In this embodiment, in S5, the temperature of the reaction kettle is monitored by a temperature sensor, and after the reaction of the reaction kettle is completed, the temperature is gradually reduced, and a terminating agent is added to the reaction kettle through an adding mechanism to stop the polymerization reaction.
[0072] In this embodiment, in S6, the obtained fluorine-containing polymer is washed by a washing device, the washing solvent is dilute hydrochloric acid, the concentration of the dilute hydrochloric acid is 3%, the washing temperature is 40°C, the washing time is 80 min, the fluorine-containing polymer after washing is dried by a vacuum drying box, the drying temperature is 60°C, the vacuum degree is 60 Pa, the drying time is 15 h, the dried fluorine-containing polymer is crushed into granules by a crushing device, and the crushed fluorine-containing polymer is screened by a screening mechanism to obtain a fluorine-containing polymer finished product with uniform particle size.
[0073] In this embodiment, in S7, the purity of the prepared fluorine-containing polymer finished product is detected by a flame ionization detector, the detector column temperature is 50-250°C, the carrier gas is helium, and the detection results are analyzed, and the reaction conditions are optimized according to the analysis results.
[0074] Example Four
[0075] Reference Figure 1 A method for preparing a fluorine-containing polymer, comprising the following steps:
[0076] S1: reacting hydrogen fluoride and ethylene to obtain a fluorine-containing monomer, and purifying the fluorine-containing monomer;
[0077] S2: adding the fluorine-containing monomer to a reaction kettle for polymerization reaction;
[0078] S3: adding a catalyst to the reaction kettle, and controlling the reaction temperature and pressure;
[0079] S4: monitoring and recording the reaction process to obtain a fluorine-containing polymer;
[0080] S5: adding a terminating agent to the reaction kettle to terminate the reaction;
[0081] S6: washing, drying, and granulating the obtained fluorine-containing polymer to obtain a fluorine-containing polymer finished product;
[0082] S7: monitoring the purity of the fluorine-containing polymer finished product, and optimizing the reaction conditions.
[0083] In this embodiment, in S1, hydrogen fluoride and ethylene are added to a reaction kettle by an adding mechanism, and a catalyst is added for reaction, the reaction temperature is 280°C, the reaction pressure is 25 Pa, a gaseous fluorine-containing monomer is prepared by reaction, the gaseous fluorine-containing monomer is condensed by a condenser, the liquid fluorine-containing monomer is distilled and separated by a distiller, and trace impurities in the liquid fluorine-containing monomer are removed by using an adsorbent and activated carbon.
[0084] In this embodiment, in S2 and S3, the purified fluorine-containing monomer is added to the reaction kettle through the adding mechanism, and the catalyst and initiator are added to the reaction kettle, the fluorine-containing monomer, the catalyst and the initiator are stirred and mixed through the mixing mechanism, the temperature and pressure of the reaction kettle are controlled by the controller, the reaction temperature of the reaction kettle is 280℃, the reaction pressure is 10Pa, and the reaction time is 2.5h.
[0085] In this embodiment, in S4, the real-time temperature, pressure and reaction time of the reaction kettle are monitored in real time by the temperature sensor, the pressure sensor and the monitoring device, and the monitored data are recorded by the data recording device, and the fluorine-containing polymer is obtained by reaction.
[0086] In this embodiment, in S5, the temperature of the reaction kettle is monitored by the temperature sensor, and after the reaction of the reaction kettle is completed, the temperature is gradually reduced, and the terminating agent is added to the reaction kettle through the adding mechanism to stop the polymerization reaction.
[0087] In this embodiment, in S6, the obtained fluorine-containing polymer is washed by the washing device, the washing solvent is dilute hydrochloric acid, the concentration of dilute hydrochloric acid is 4%, the washing temperature is 50℃, and the washing time is 100min, the washed fluorine-containing polymer is dried by the vacuum drying box, the drying temperature is 70℃, the vacuum degree is 80Pa, and the drying time is 18h, the dried fluorine-containing polymer is crushed into granular by the crushing device, and the crushed fluorine-containing polymer is screened by the screening mechanism to obtain the finished product of fluorine-containing polymer with uniform particle size.
[0088] In this embodiment, in S7, the purity of the prepared fluorine-containing polymer product is detected by the flame ionization detector, the detector column temperature is 50-250℃, the carrier gas is helium, and the detection results are analyzed, and the reaction conditions are optimized according to the analysis results.
[0089] Example five
[0090] Reference Figure 1 A method for preparing a fluorine-containing polymer, comprising the following steps:
[0091] S1: reacting hydrogen fluoride and ethylene to obtain a fluorine-containing monomer, and purifying the fluorine-containing monomer;
[0092] S2: adding the fluorine-containing monomer to the reaction kettle for polymerization reaction;
[0093] S3: adding a catalyst to the reaction kettle, and controlling the reaction temperature and pressure;
[0094] S4: monitoring and recording the reaction process to obtain a fluorine-containing polymer;
[0095] S5: adding a terminating agent into the reaction kettle to terminate the reaction;
[0096] S6: washing, drying and granulating the obtained fluorine-containing polymer to obtain a fluorine-containing polymer product;
[0097] S7: monitoring the purity of the fluorine-containing polymer product and optimizing the reaction conditions.
[0098] In this embodiment, in S1, hydrogen fluoride and ethylene are added into the reaction kettle through an adding mechanism, and a catalyst is added for reaction, the reaction temperature is 300°C, the reaction pressure is 30 Pa, and gaseous fluorine-containing monomers are prepared by reaction. The gaseous fluorine-containing monomers are condensed by a condenser, and the liquid fluorine-containing monomers are distilled and separated by a distiller. Trace impurities in the liquid fluorine-containing monomers are removed by using an adsorbent and activated carbon.
[0099] In this embodiment, in S2 and S3, the purified fluorine-containing monomers are added into the reaction kettle through an adding mechanism, and a catalyst and an initiator are added into the reaction kettle. The fluorine-containing monomers, the catalyst and the initiator are stirred and mixed by a mixing mechanism. The temperature and the pressure of the reaction kettle are controlled by a controller. The reaction temperature of the reaction kettle is 300°C, the reaction pressure is 12 Pa, and the reaction time is 3 h.
[0100] In this embodiment, in S4, the real-time temperature, pressure and reaction time of the reaction kettle are monitored in real time by a temperature sensor, a pressure sensor and a monitoring device, and the monitored data are recorded by a data recording device. The fluorine-containing polymer is obtained by reaction.
[0101] In this embodiment, in S5, the temperature of the reaction kettle is monitored by a temperature sensor. After the reaction of the reaction kettle is completed, the temperature is gradually reduced, and a terminating agent is added into the reaction kettle by an adding mechanism to stop the polymerization reaction.
[0102] In this embodiment, in S6, the obtained fluorine-containing polymer is washed by a washing device. The washing solvent is dilute hydrochloric acid, the concentration of the dilute hydrochloric acid is 5%, the washing temperature is 60°C, and the washing time is 120 min. The washed fluorine-containing polymer is dried by a vacuum drying oven, the drying temperature is 80°C, the vacuum degree is 100 Pa, and the drying time is 20 h. The dried fluorine-containing polymer is crushed into granular by a crushing device, and the crushed fluorine-containing polymer is screened by a screening mechanism to obtain a fluorine-containing polymer product with uniform particle size.
[0103] In this embodiment, in S7, the purity of the prepared fluorine-containing polymer product is detected by a flame ionization detector, the detector column temperature is 50-250°C, the carrier gas is helium, and the detection results are analyzed. According to the analysis results, the reaction conditions are optimized.
[0104] Experimental Example
[0105] Through the embodiment one to five proposed entity file's simulation storage and display scheme, contrast conventional storage and display scheme, experimental data as follows:
[0106] Example I Example I Example I Example I Example I Mechanical property improvement Mechanical property improvement Mechanical property improvement Mechanical property improvement Mechanical property improvement 6% 9% 11% 14% 17%
[0107] The above merely the preferred specific embodiments of the present application, but the protection scope of the present application is not limited to this, any familiar with the technical field of the technical personnel in the technical range disclosed by the present application, according to the technical scheme of the present application and its inventive concept equivalent replacement or change, should be covered within the protection scope of the present application.
Claims
1. A method for preparing a fluoropolymer, characterized in that: Includes the following steps: S1: Hydrogen fluoride and ethylene are reacted to obtain a fluorine-containing monomer, and the fluorine-containing monomer is purified. S2: Fluorine-containing monomers are added to the reactor to carry out the polymerization reaction; S3: Add catalyst into the reactor and control the reaction temperature and pressure; S4: Monitor and record the reaction process to obtain a fluoropolymer; S5: Add a terminator to the reactor to terminate the reaction; S6: The obtained fluoropolymer is washed, dried, and granulated to obtain the finished fluoropolymer product; S7: Monitor the purity of the finished fluoropolymer product and optimize the reaction conditions.
2. The method for preparing a fluoropolymer according to claim 1, characterized in that: In step S1, hydrogen fluoride and ethylene are added to the reactor through an addition mechanism, and a catalyst is added to carry out the reaction. The reaction temperature is 200-300℃, the reaction pressure is 10-30Pa, and a gaseous fluorinated monomer is obtained from the reaction.
3. The method for preparing a fluoropolymer according to claim 2, characterized in that: In step S1, the gaseous fluorinated monomer is condensed by a condenser, the liquid fluorinated monomer is separated by distillation by a distiller, and trace impurities in the liquid fluorinated monomer are removed by adsorbent and activated carbon.
4. The method for preparing a fluoropolymer according to claim 3, characterized in that: In steps S2 and S3, the purified fluorine-containing monomer is added to the reactor through the addition mechanism, and a catalyst and initiator are added to the reactor. The fluorine-containing monomer, catalyst and initiator are stirred and mixed through the mixing mechanism. The temperature and pressure of the reactor are controlled by the controller. The reaction temperature of the reactor is 200-300℃, the reaction pressure is 4-12Pa, and the reaction time is 1-3h.
5. The method for preparing a fluoropolymer according to claim 4, characterized in that: In step S4, the real-time temperature, pressure, and reaction time of the reactor are monitored in real time using temperature sensors, pressure sensors, and monitoring devices, and the monitored data are recorded using a data recording device, resulting in the reaction yielding a fluoropolymer.
6. The method for preparing a fluoropolymer according to claim 5, characterized in that: In step S5, the temperature of the reactor is monitored by a temperature sensor. After the reaction in the reactor is completed, the temperature is gradually reduced, and a terminator is added to the reactor through an addition mechanism to stop the polymerization reaction.
7. The method for preparing a fluoropolymer according to claim 6, characterized in that: In step S6, the obtained fluoropolymer is washed using a washing device. The washing solvent is dilute hydrochloric acid with a concentration of 1-5%, the washing temperature is 20-60°C, and the washing time is 30-120 minutes.
8. The method for preparing a fluoropolymer according to claim 7, characterized in that: In step S6, the washed fluoropolymer is dried in a vacuum drying oven at a temperature of 40-80°C, a vacuum degree of 20-100Pa, and a drying time of 10-20 hours.
9. The method for preparing a fluoropolymer according to claim 8, characterized in that: In step S6, the dried fluoropolymer is pulverized into granules by a pulverizing device, and then sieved by a sieving mechanism to obtain a fluoropolymer product with uniform particle size.
10. The method for preparing a fluoropolymer according to claim 9, characterized in that: In step S7, the purity of the obtained fluoropolymer product is detected by a flame ionization detector. The detector column temperature is 50-250℃, the carrier gas is helium, and the detection results are analyzed. The reaction conditions are optimized based on the analysis results.