Method and system for continuous solution polymerization of butene and applications

Abstract

This invention discloses a method, system, and application for continuous solution polymerization of butene, comprising: solution polymerization of butene monomer in the presence of a catalyst; and when blockage and scaling occur during the solution polymerization, a flushing system is activated simultaneously with the solution polymerization to apply flushing liquid to the blockage points for dissolving, diluting, and flushing the blockage points; wherein the flushing process includes: (1) the flushing medium is the polymerized monomer butene, and a portion of the flushing liquid is led to each flushing point through the flushing system pipeline; (2) the flushing liquid polymerizes the monomer butene, and a suitable flushing temperature is controlled to pass through the blockage points, carrying out a polymer solution containing the polymerized monomer butene and the blockage polymer; wherein the flushing temperature is 60-130℃; (3) the polymer solution containing the polymerized monomer butene and the blockage polymer is entered into a separation and recovery system for separation and recovery to obtain unreacted polymerized monomer butene and polymer products; wherein the unreacted monomer butene enters a purification system to be returned to the solution polymerization for recycling, and the polymer enters a product processing system.

Description

Technical Field

[0001] This invention relates to the field of olefin solution polymerization, and more specifically to a method, system, and application of a continuous solution polymerization reaction of butene. Background Technology

[0002] This invention relates to the field of α-olefin polymerization. In olefin solution polymerization processes, monomers are polymerized in a reactor in the presence of a main catalyst, a co-catalyst, and / or a solvent. As the polymerization reaction proceeds, the reaction system undergoes a gradual concentration process from monomer polymerization to polymer solution and then to monomer removal. During this process, the viscosity of the material increases by orders of magnitude, resulting in a significant change in the material's flowability. The resulting high-viscosity polymer often accumulates in pipes and / or equipment (heat exchangers, transfer pumps, etc.), causing poor material transport or even blockages. This necessitates frequent shutdowns to clean the blocked pipes and equipment, which has a significant adverse impact on the production efficiency and operating capacity of industrial plants, and also affects the overall operating costs of the plant.

[0003] Existing technologies for addressing polymer clogging typically employ various mechanical methods, such as high-pressure water jets. However, this method has several drawbacks: it requires opening the operating equipment or pipelines for unblocking, and the pipelines or equipment must be thoroughly dried before resuming operation to prevent moisture from acting as a poison and causing irreversible damage to the polymerization catalyst. Solvent cleaning methods are also frequently used, but the resulting polymer-laden solvents must be separated, recovered, and purified before reuse. Furthermore, the storage, transportation, and recovery of these solvents require the reconfiguration of related equipment and processes.

[0004] Therefore, it is necessary to develop a flushing method suitable for continuous olefin solution polymerization processes to overcome the impact of existing methods on the long-term stable operation of industrial plants, and to achieve effective online treatment of points of poor transport or blockage, so as to reduce the number of times to clean blocked pipes or equipment due to downtime, and achieve the goal of long-term high-efficiency operation. Summary of the Invention

[0005] The purpose of this invention is to overcome the polymer clogging and scaling problems in existing polymerization processes and to provide a method, system and application for continuous solution polymerization of butene.

[0006] To achieve the above objectives, a first aspect of the present invention provides a method for continuous solution polymerization of butene, wherein the method includes:

[0007] In the presence of a catalyst, butene monomer is solution polymerized, and when blockage and scaling occur during the solution polymerization process, a flushing system is activated simultaneously with the solution polymerization to apply flushing fluid to the blockage points for dissolving, diluting and flushing the blockage points.

[0008] The rinsing process includes:

[0009] (1) The flushing medium is the polymeric monomer butene. A portion of the polymeric monomer butene is used as flushing liquid and is led to each flushing point through the flushing system pipeline.

[0010] (2) The flushing solution contains butene monomer, and the appropriate flushing temperature is controlled to pass through the blockage point, carrying out a polymer solution containing butene monomer and the blockage polymer; wherein, the flushing temperature is 60-130℃;

[0011] (3) The polymer solution containing the polymer monomer butene and the blockage polymer is fed into a separation and recovery system for separation and recovery to obtain unreacted polymer monomer butene and polymer products; wherein, the unreacted monomer butene is fed into a purification system to be recycled back to the solution for polymerization, and the polymer is fed into a product processing system.

[0012] A second aspect of the present invention provides a system for a continuous solution polymerization reaction of butene, wherein the system comprises: a polymerization unit and a cleaning unit;

[0013] The polymerization unit includes: a feed tank, a reactor, an emergency discharge line, a circulating pump, a heat removal heat exchanger, a material conveying pump, and a heating heat exchanger;

[0014] The cleaning unit includes flushing pipes that connect the feed tank to the reactor, the heat removal heat exchanger, the material conveying pump and its auxiliary line, and the heating heat exchanger. When blockages occur in the reactor, the heat removal heat exchanger, the emergency discharge line, the material conveying pump and its auxiliary line, the unit provides a portion of the polymer monomer butene as flushing fluid to clear the blockages.

[0015] A third aspect of the present invention provides an application of the method or system provided by the present invention in removing blockages during butene solution polymerization.

[0016] Through the above technical solutions, the method and system for continuous solution polymerization of butene described in this invention provide a rapid and effective rinsing process. In particular, the rinsing solution used is the same substance as the monomer in the polymerization reaction, eliminating the need to introduce new rinsing solvents, and can be recycled. Simultaneously, the temperature of the rinsing solution is adjustable, especially when using high-temperature rinsing solution to flush and unclog unheated discharge pipelines with poor flow, achieving better rinsing results. This method is easy to implement, especially when used online to unclog discharge bottlenecks, reducing material concentration and viscosity to quickly adjust material conveying capacity. The method of this invention can overcome the shortcomings of existing technologies by minimizing downtime, using lower equipment costs and / or productivity losses, and / or by minimizing rinsing solution consumption online. Attached Figure Description

[0017] Figure 1 This is a flowchart of a continuous solution polymerization reaction of butene provided by the present invention.

[0018] Explanation of reference numerals in the attached figures

[0019] C101: Feed tank; P101: Booster pump; E101: Heat exchange equipment; R201: Reactor; E202: Heat removal heat exchanger; P202: Material transfer pump; E301: Heat exchanger; C301: Separation equipment; T301: Refining equipment Detailed Implementation

[0020] The endpoints and any values ​​of the ranges disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0021] The first aspect of this invention provides a method for continuous solution polymerization of butene, wherein the method includes:

[0022] In the presence of a catalyst, butene monomer is solution polymerized, and when blockage and scaling occur during the solution polymerization process, a flushing system is activated simultaneously with the solution polymerization to apply flushing fluid to the blockage points for dissolving, diluting and flushing the blockage points.

[0023] The rinsing process includes:

[0024] (1) The flushing medium is the polymeric monomer butene. A portion of the polymeric monomer butene is used as flushing liquid and is led to each flushing point through the flushing system pipeline.

[0025] (2) The flushing solution contains butene monomer, and the appropriate flushing temperature is controlled to pass through the blockage point, carrying out a polymer solution containing butene monomer and the blockage polymer; wherein, the flushing temperature is 60-130℃;

[0026] (3) The polymer solution containing the polymer monomer butene and the blockage polymer is fed into a separation and recovery system for separation and recovery to obtain unreacted polymer monomer butene and polymer products; wherein, the unreacted monomer butene is fed into a purification system to be recycled back to the solution for polymerization, and the polymer is fed into a product processing system.

[0027] In some specific embodiments of the present invention, the flushing process pipeline is equipped with steam heating to maintain the butene in the flushing solution at the flushing solution temperature. The temperature of the flushing solution is 60-130°C. The flushing solution temperature set in this application will neither cause low-temperature precipitation of polymer nor high-temperature vaporization of butene, thus achieving a better flushing effect. Preferably, the temperature of the flushing solution is 70-75°C.

[0028] In some specific embodiments of the present invention, the feed pressure of the rinsing fluid is 2.8-3 MPa.

[0029] In some specific embodiments of the present invention, the method further includes confirming whether the flushing is complete by measuring whether the flow pressure difference at the blockage point has decreased to the normal range, or by detecting whether the density of the discharged liquid reaches the density of pure butene monomer at the corresponding temperature.

[0030] This invention is applicable to olefin solution polymerization technology. When material transport is obstructed or blocked, a flushing process is initiated to flush the blocked equipment or pipelines. Flushing continues until the pipeline resistance drops back to its pre-blockage condition, or until the system density monitoring point reaches the normal operating value. At this point, the flushing process can be stopped to restore normal operation and continue the polymerization reaction. This method avoids large-scale plant shutdowns and cessation of operation due to polymer blockage. It also avoids the deactivation of the polymerization reaction system by toxic substances caused by insufficient water removal after high-pressure water cleaning of equipment and pipelines, preventing more serious consequences. The flushing process of this invention allows for adaptive temperature control to ensure flushing effectiveness. More importantly, it avoids plant shutdowns, minimizing the impact and spread of blockages through online flushing. Normal operation can be resumed immediately after flushing.

[0031] A second aspect of the present invention provides a system for a continuous solution polymerization reaction of butene, such as... Figure 1 As shown, the system includes: an aggregation unit and a cleaning unit;

[0032] The polymerization unit includes: a feed tank C101, a reactor R201, an emergency discharge line V202b, a circulating pump P201, a heat removal heat exchanger E202, a material conveying pump P202, and a heating heat exchanger E301.

[0033] The cleaning unit includes flushing pipes 201 / 202 / 203 / 204 that connect the feed tank C101 to the reactor R201, the heat removal heat exchanger E202, the material conveying pump P202 and its auxiliary line, and the heating heat exchanger E301, respectively. When blockages occur in the reactor R201, the heat removal heat exchanger E202, the emergency discharge line, the material conveying pump P202 and its auxiliary line, the unit provides a portion of the polymerized monomer butene as flushing fluid to clear the blockages.

[0034] In some specific embodiments of the present invention, the flushing pipe is equipped with a heat tracing device to maintain the temperature of the flushing fluid at not less than 60°C. The heat tracing device can be electric heat tracing or steam heat tracing.

[0035] In some specific embodiments of the present invention, the flushing pipe 202 includes a first flushing pipe connecting the feed tank C101 and the reactor R201 to an emergency discharge pipe. This flushing pipe is used to flush and clear blockages in the emergency discharge pipe by using a portion of the butene monomer as flushing fluid. In this invention, when the polymerization process is affected by overheating, overpressure, or equipment failure, the reaction system needs to perform an emergency discharge operation to ensure the safety of the production process. This flushing pipe is used to ensure the smooth and continuous operation of the discharge line during the discharge process. Using this method avoids blockages in the emergency discharge pipe after the polymer solution is released, and avoids disassembling the pipe for cleaning; it reduces labor and lowers operational risks.

[0036] In some specific embodiments of the present invention, the flushing pipe 203 includes a second flushing pipe connecting the feed tank C101 and the heat exchanger E202. This flushing pipe is used to flush and clear blockages in the heat exchanger E202 by using a portion of the butene monomer as flushing fluid. When the polymerization process is unable to operate due to P201, the flushing process 203 needs to be activated to flush E202 and R201 to thoroughly flush and replace the polymer solution in the reaction system, especially the reactor heat exchanger E202. Using this method avoids blockages in the reactor heat exchanger, avoids the need to open the heat exchanger for cleaning, and improves production efficiency while reducing operational risks.

[0037] In some specific embodiments of the present invention, the flushing pipe 204 includes a third flushing pipe connecting the feed tank C101 and the material conveying pump P202 in parallel. This third flushing pipe is used to flush and clear blockages when the material conveying pump P202's secondary line needs to be flushed after it has been put into operation. When the polymerization process requires a shutdown for maintenance due to a P202 malfunction, the P202 secondary line is used as a channel to ensure the continuous operation of the polymerization process. When P202 is back in normal operation and is switched off for standby, the polymerization solution in the P202 secondary line needs to be flushed to ensure unobstructed flow when it is put back into operation. This requires starting the flushing process 204 to flush the polymer solution remaining in the P202 secondary line. Using this method ensures the continuity of the polymerization process and achieves the recycling of the P202 secondary line.

[0038] In some specific embodiments of the present invention, the polymerization unit further includes a booster pump P101 and a heat exchange device E101; wherein, the booster pump P101 is used to increase the feed pressure of the rinsing liquid and butene monomer to 2.8-3 MPa, and the heat exchange device E101 is used to increase the temperature of the rinsing liquid to 60-130°C, preferably 70-75°C.

[0039] In some specific embodiments of the present invention, the feed tank C101 is connected to the booster pump P101, the booster pump P101 is connected to the heat exchange device E101, and the heat exchange device E101 is connected to the reactor R201.

[0040] In some specific embodiments of the present invention, the polymerization unit further includes a processing system for a separation device C301 and a purification device C301;

[0041] The heating heat exchanger E301 is connected to the separation device C301, the top of the separation device C301 is connected to the refining device C301, the refining device C301 is connected to the feed tank C101, and the bottom of the separation device is connected to the processing system.

[0042] In some specific embodiments of the present invention, the rinsing process specifically includes:

[0043] (1) Butene, the monomer of the polymerization reaction, is used as the flushing liquid. The flushing liquid and the monomer of the polymerization reaction are stored in the feed tank C101. The flushing liquid and the monomer of the polymerization reaction are fed by the booster pump P101. A heat exchange device E101 is set in the main feed stream 101 of the monomer of the polymerization reaction. After heat exchange, it enters the reactor R201 as the main feed stream 201. The monomer of the polymerization reaction is led from the main feed line to the emergency discharge pipe of the polymerization reactor through the stream 202. The stream 203 is led to the polymerization reaction heat removal heat exchanger E202. The stream 204 is led to the flushing point and the point to be flushed, such as the auxiliary line of the material conveying pump P202 and the polymer heating heat exchanger E301.

[0044] (2) The rinsing liquid carries the polymer into the discharge system or flows into the post-treatment system with the process materials. It is further pressurized by the polymer transfer pump P202 and enters the polymer solution heating equipment E301 for heating. Then it enters the separation equipment C301. In C301, the unreacted monomers and / or rinsing liquid are separated and flow out from the top of C301 in stream 301 into T301 for further purification. After stream 302, it returns to the polymerization reaction monomer feed tank C101 to continue the cycle. The polymer stream 401 at the bottom of C301 enters the product processing system.

[0045] A third aspect of the present invention provides the application of the method or system provided by the present invention in relieving blockages in butene solution polymerization.

[0046] In this invention, the application can be to remove blockages that occur during the continuous solution polymerization reaction of butene or during shutdown.

[0047] In some specific embodiments of the present invention, the system can be diluted and flushed during shutdown. The flushing pipe 201 includes a dilution and cleaning pipe connecting the feed tank C101 and the polymerization reaction system R201, P201, E202, P202, and E301. It is used to dilute and flush the system during the shutdown of the polymerization reaction after the catalyst is stopped.

[0048] In some specific embodiments of the present invention, during the shutdown of the device reaction, after the catalyst is stopped being added, the system can be diluted and flushed during the shutdown process; wherein, the flushing process includes: using all of the butene monomer as flushing liquid, using pump P101 to bring the flushing liquid to a flushing pressure of 2.8-3 MPa, using E101 to heat the flushing liquid to 70-75°C, leading the flushing liquid to R201 through pipeline 201, and flushing the butene, carrying the remaining polymer solution from the reaction, flowing to the post-processing unit according to the process flow, and judging the density of the material in the reaction system and the density of the material in the reactor by the online density detector (DI) installed in the reaction system, which tends to be close to the density of the butene in the flushing liquid under the temperature and pressure conditions of 520 kg / m³. 3 Determine that the flushing and replacement of the reaction system is complete.

[0049] The present invention will be described in detail below through embodiments.

[0050] Unless otherwise specified in the following examples and comparative examples, all conditions were performed under standard conditions or conditions recommended by the manufacturer. Reagents or instruments used, unless otherwise specified, are all commercially available products.

[0051] Example 1 (Flushing Drainage Pipeline)

[0052] exist Figure 1 In the system shown, butene monomers are solution polymerized in the presence of a catalyst, and when the emergency discharge line of the reactor becomes blocked during the solution polymerization process, flushing is performed simultaneously with the solution polymerization to clear the blockage.

[0053] The flushing process includes: using a portion of the butene monomer as flushing fluid; using pump P101 to achieve a flushing pressure of 2.8 MPa; using E101 to heat the flushing fluid to 70°C; and leading the flushing fluid to the emergency discharge valve V202b via pipeline 202. The flushing fluid pipeline is equipped with full steam heating to ensure the flushing temperature is not lower than 60°C. Opening V202b initiates the emergency discharge operation, allowing the reactor polymer solution to enter the discharge pipeline. Opening V202a initiates the flushing process, continuously releasing flushing butene that carries the polymer solution into the emergency discharge tank for collection until discharge is complete. After closing the emergency discharge valve V202b, flushing the emergency discharge pipeline with a volume five times its capacity before closing V202a to end the flushing operation.

[0054] Example 2 (rinsing E202)

[0055] In the presence of a catalyst, butene monomers are solution polymerized, and when a heat exchanger becomes clogged during the solution polymerization process, the clog is cleared by flushing during the solution polymerization.

[0056] The rinsing process includes: using a portion of the butene monomer as the rinsing fluid; using pump P101 to achieve a rinsing pressure of 2.8 MPa; heating the rinsing fluid to 70°C using E101; and guiding the rinsing fluid to E202 via pipeline 203. The rinsing fluid pipeline is equipped with full steam tracing to ensure the rinsing temperature is not lower than 60°C. Opening V203a initiates the rinsing process, and the continuously flowing rinsing butene, carrying the polymer solution, flows to the post-processing unit according to the process flow. The rinsing process is ensured to be complete by maintaining the pressure difference (PDI) before and after E202 at a normal operating condition of 0.05 MPa. The rinsing process ends when V203a is closed.

[0057] Example 3 (rinsing P202 sub-line)

[0058] In the presence of a catalyst, butene monomers are solution polymerized. When the P202 sub-line pipeline needs to be flushed to keep it unobstructed and ready for use after being put into operation during the solution polymerization process, flushing is carried out at the same time as the solution polymerization to clear the blockage.

[0059] The flushing process includes: using a portion of the butene monomer as flushing fluid; using pump P101 to achieve a flushing pressure of 3 MPa; using E101 to heat the flushing fluid to 75°C; and leading the flushing fluid to the P202 auxiliary pipeline through pipeline 204. The flushing fluid pipeline is equipped with full steam heating to ensure that the flushing temperature is not lower than 60°C. After confirming that V204b and V204d are closed, V204c and V-204a are opened sequentially to start the flushing process. The continuously flowing flushing butene will carry the polymer solution into the discharge tank for collection. After flushing with a volume of 5 times the P202 auxiliary pipeline, V204a is closed to end the flushing operation.

[0060] Example 4 (System Dilution Rinse)

[0061] During the shutdown of the unit reaction, after the catalyst is stopped being added, the system can be diluted and flushed during the shutdown process;

[0062] The rinsing process includes: using all the butene monomer as rinsing liquid; using pump P101 to achieve a rinsing pressure of 3 MPa; heating the rinsing liquid to 75°C using E101; and leading the rinsing liquid to R201 through pipeline 201. The rinsing butene, carrying the remaining polymer solution from the reaction, flows to the post-processing unit according to the process flow. The density of the materials in the reaction system and the reactor is determined by an online density meter (DI) installed in the reaction system, and the density of the materials tends to be close to the density of the butene in the rinsing liquid at this temperature and pressure conditions, which is 520 kg / m³. 3 Determine that the flushing and replacement of the reaction system is complete.

[0063] After the rinsing process of the polymerization reaction in Examples 1-4 was completed, the pipeline was opened when the device was shut down. The pipeline was found to be clean and free of residual polymer, indicating that the rinsing process of the polymerization reaction of the present invention achieved very good results.

[0064] Comparative Example 1

[0065] Without effectively flushing the reactor R201, heat exchanger E202, and the previously used P202 branch line and emergency discharge line, the equipment experienced fluctuating shutdowns due to the continuous deterioration of the discharge obstruction, which led to poor material flowability. A large amount of solid polymer appeared in the opened pipes, requiring high-pressure water cleaning to clear the blockages. This not only caused the equipment to shut down but also increased labor costs and reduced production efficiency during the cleaning process.

[0066] Using Examples 1-3 of the present invention, the flushing process during the polymerization reaction has significant effects on clearing heat exchangers, ensuring the polymer delivery pump branch line and emergency discharge pipeline can be reused after commissioning. More importantly, it can avoid plant shutdowns, minimizing the impact and spread of blockages through online flushing; after flushing, normal operation can be resumed immediately. The system described in Example 4 can be diluted and flushed during shutdown. In Examples 1-4 of the present invention, the flushing liquid carrying polymer enters the post-processing unit according to the process flow. The polymer solution separates polymer products and flushing liquid monomers. The flushing liquid is recycled and enters the monomer feeding flushing system, achieving green recycling without introducing other flushing solvents.

[0067] The preferred embodiments of the present invention have been described in detail above; however, the present invention is not limited thereto. Within the scope of the inventive concept, various simple modifications can be made to the technical solutions of the present invention, including combinations of various technical features in any other suitable manner. These simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.

Claims

1. A process for the continuous solution polymerization of butene, characterized in that, The method includes: In the presence of a catalyst, butene monomer is solution polymerized. When blockage and scaling occur in the reactor, heat exchanger, emergency discharge line, material conveying pump and auxiliary line during the solution polymerization process, the flushing system is started at the same time as the solution polymerization to apply flushing liquid to the blockage point for dissolving, diluting and flushing the blockage point. The rinsing process includes: (1) The flushing medium is the polymerized monomer butene. A portion of the polymerized monomer butene is used as flushing liquid and is led to each flushing point through the flushing system pipeline. (2) The flushing solution polymerizes butene monomer, and the appropriate flushing temperature is controlled to pass through the blockage point, carrying out a polymer solution containing butene monomer and the blockage polymer; wherein, the flushing temperature is 70-75℃; the feed pressure of the flushing solution is 2.8-3MPa; and the flushing solution temperature is maintained at not less than 60℃. (3) The polymer solution containing the polymer monomer butene and the blockage polymer is fed into a separation and recovery system for separation and recovery to obtain unreacted polymer monomer butene and polymer products; wherein, the unreacted polymer monomer butene is fed into a purification system to be returned to the solution for polymerization and recycling, and the polymer is fed into a product processing system.

2. The method of claim 1, wherein, The method also includes confirming whether the flushing process is complete by measuring whether the flow pressure difference at the blockage point has decreased to the normal range, or by detecting whether the density of the discharged polymer solution reaches the density of pure butene monomer at the corresponding temperature.

3. The method of claim 1, wherein, The method is carried out in a system for continuous solution polymerization of butene, which includes a polymerization unit and a cleaning unit. The polymerization unit includes: a feed tank, a reactor, an emergency discharge line, a circulating pump, a heat removal heat exchanger, a material conveying pump, and a heating heat exchanger; The cleaning unit includes flushing pipes that connect the feed tank to the reactor, the heat removal heat exchanger, the material conveying pump and its auxiliary line, and the heating heat exchanger. When blockages occur in the reactor, the heat removal heat exchanger, the emergency discharge line, the material conveying pump and its auxiliary line, the unit provides a portion of the polymer monomer butene as flushing fluid to clear the blockages.

4. The method of claim 3, wherein, The flushing pipe is equipped with a heat tracing device to maintain the flushing fluid temperature at no less than 60°C.

5. The method of claim 3, wherein, The flushing pipe includes a first flushing pipe that connects the feed tank and the reactor to the emergency discharge pipe, which is used to flush and clear blockages by using a portion of the butene monomer as flushing fluid when the emergency discharge pipe becomes blocked.

6. The method of claim 3, wherein, The flushing pipe includes a second flushing pipe connecting the feed tank and the heat exchanger, used to flush and clear blockages in the heat exchanger by using a portion of the butene monomer as flushing fluid.

7. The method of claim 3, wherein, The flushing pipeline includes a third flushing pipeline that connects the feed tank and the auxiliary line connected in parallel with the material conveying pump. When the auxiliary line pipeline of the material conveying pump needs to be flushed and unblocked after it is put into use, a portion of the butene monomer is used as flushing fluid to flush and unclog it.

8. The method of claim 3, wherein, The polymerization unit also includes a booster pump and a heat exchange device; wherein the booster pump is used to increase the feed pressure of the flushing liquid and butene monomer to 2.8-3 MPa, and the heat exchange device is used to heat the butene monomer to 70-75°C.

9. The method of claim 8, wherein, The feed tank is connected to the booster delivery pump, the booster delivery pump is connected to the heat exchange device, and the heat exchange device is connected to the reactor.

10. The method according to any one of claims 3-9, characterized in that, The polymerization unit further comprises a separation device, a refining device and a treatment system; The heating heat exchanger is connected to the separation device, the top of the separation device is connected to the refining device, the refining device is connected to the feed tank, and the bottom of the separation device is connected to the treatment system.

11. Use of the method according to any one of claims 1 to 10 for the removal of blockages in butene solution polymerization.

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