Polymerization reaction device for producing chain-end functionalized solution polymerized styrene-butadiene rubber

Abstract

The utility model provides a polymerization reaction device for producing chain-end functionalized solution polymerized styrene-butadiene rubber, which comprises a reaction kettle, a pre-cooling cavity on the upper layer and a reaction cavity on the lower layer are arranged in the reaction kettle, and the pre-cooling cavity is communicated with the reaction cavity; the circulating cooling pipeline is located outside the reaction kettle, and the two ends of the first glue solution pipeline and the two ends of the second glue solution pipeline circulate through the circulating cooling pipeline; the first glue solution pipeline penetrates through the pre-cooling cavity and the reaction cavity, and the part, located in the pre-cooling cavity, of the first glue solution pipeline is a first coil pipe; the second glue solution pipeline at least penetrates through the reaction cavity, and the part, located in the reaction cavity, of the second glue solution pipeline is a second coil pipe; the reaction solvent pipeline is communicated with the pre-cooling cavity; the initiator pipeline is communicated with the reaction cavity. The solution polymerized styrene-butadiene rubber reaction kettle solves the problem that the temperature distribution in the kettle is not uniform when the solution polymerized styrene-butadiene rubber reaction kettle dissipates heat.

Description

TECHNICAL FIELD

[0001] The utility model relates to rubber production technical field, specifically, relate to a kind of for producing chain end functionalization solution polymerized styrene-butadiene rubber polymerization reaction device. BACKGROUND

[0002] Solution polymerized styrene-butadiene rubber (SSBR) has good low-temperature flexibility, resilience and wear resistance. The demand for SSBR continues to grow for tires, retreading and molded products, injection and extrusion products, medical devices, footwear and automotive parts.

[0003] Solution polymerized styrene-butadiene rubber is mainly produced in a continuous polymerization manner during production. In the polymerization reaction process, a large amount of heat is released. Currently, a reaction kettle jacket is generally used to remove heat mechanically. The reaction kettle jacket is a static heat removal method. A temperature field distribution is formed along the radial direction from the kettle wall to the stirring shaft. The temperature distribution in the kettle is uneven. SUMMARY

[0004] The utility model solves the problem of uneven temperature distribution in the kettle during heat dissipation of solution polymerized styrene-butadiene rubber reaction kettle.

[0005] To solve the above problems, the utility model provides a kind of for producing chain end functionalization solution polymerized styrene-butadiene rubber polymerization reaction device, the polymerization reaction device includes: reaction kettle, the reaction kettle has upper precooling cavity and lower reaction cavity, the precooling cavity and the reaction cavity are communicated;Circulating cooling pipeline, first glue liquid pipeline and second glue liquid pipeline, the circulating cooling pipeline is located outside the reaction kettle, and the two ends of the first glue liquid pipeline and the second glue liquid pipeline are circulated by the circulating cooling pipeline;The first glue liquid pipeline passes through the precooling cavity and the reaction cavity, and the part of the first glue liquid pipeline in the precoolulating cavity is first coil pipe;The second glue liquid pipeline at least passes through the reaction cavity, and the part of the second glue liquid pipeline in the reaction cavity is second coil pipe;Reaction solvent pipeline, the reaction solvent pipeline is communicated with the precooling cavity;Initiator pipeline, the initiator pipeline is communicated with the reaction cavity.

[0006] After adopting the technical scheme, the circulating cooling pipeline outside the reaction kettle can continuously pass low-temperature glue liquid into the first glue liquid pipeline and the second glue liquid pipeline for heat removal. The first glue liquid pipeline can precool the reaction solvent before reaction to avoid subsequent violent reaction. The second glue liquid pipeline can dynamically circulate heat removal during the reaction, more fully contact materials in the reaction kettle, effectively cool the materials, better heat removal effect, more uniform material temperature distribution in the kettle, which is conducive to the control of solution polymerized styrene-butadiene rubber structure and quality.

[0007] Further, the polymerization reaction device further comprises a partition plate located in the reaction kettle and separating the inner cavity of the reaction kettle into the pre-cooling cavity and the reaction cavity, the partition plate having a through hole for the reaction solvent introduced through the reaction solvent pipeline.

[0008] The technical effects achieved after adopting the technical scheme are that the partition plate is used for buffering the reaction solvent, the reaction solvent slowly flows in the pre-cooling cavity above the partition plate, and after being sufficiently cooled, the reaction solvent flows into the reaction cavity through the through hole to perform the reaction, thereby improving the heat exchange effect of the pre-cooling cavity.

[0009] Further, the first glue liquid pipeline further comprises a first straight pipe located in the reaction cavity, and the first straight pipe and the first coil pipe are installed on the partition plate and are in communication with each other.

[0010] The technical effects achieved after adopting the technical scheme are that the first glue liquid pipeline is divided into two sections to facilitate installation and fixation with the partition plate; since the temperature of the material during the reaction is higher than the temperature of the glue liquid, the first straight pipe is further used for heat exchange with the material, which is also conducive to stabilizing the temperature of the reaction process; after heat exchange, the first straight pipe is combined with the second glue liquid pipeline, and the glue liquid in the first straight pipe is cooled through the circulating cooling pipeline, and the glue liquid can be used for refrigeration and heat exchange again.

[0011] Further, the first straight pipe is located outside the second coil pipe.

[0012] The technical effects achieved after adopting the technical scheme are that the temperature of the glue liquid in the second coil pipe is lower than that of the first straight pipe, and the second coil pipe located on the inner side can more fully remove heat from the reaction; the first straight pipe located on the outer side can continue to remove heat from the material with high temperature stirred to the outer side, so that the temperature in the reaction kettle is more uniform.

[0013] Further, the circulating cooling pipeline is provided with a glue liquid circulating pump and a glue liquid cooler.

[0014] The technical effects achieved after adopting the technical scheme are that the glue liquid circulating pump is used for driving the glue liquid to flow, so that the glue liquid with high temperature after heat exchange can leave the reaction kettle, enter the glue liquid cooler to be cooled, and then re-enter the first glue liquid pipeline and the second glue liquid pipeline to be heat exchanged.

[0015] Further, the glue liquid cooler comprises a chilled water cavity and a glue liquid pipeline, and the glue liquid pipeline is located in the chilled water cavity.

[0016] The technical effects achieved after adopting the technical scheme are that the chilled water cavity can continuously cool the glue liquid pipeline by inputting low-temperature water, so as to facilitate the glue liquid to circulantly cool the inside of the reaction kettle.

[0017] Furthermore, the polymerization reaction apparatus further includes a stirring device, which comprises a driving device, a driving shaft, and a stirring shaft. The stirring shaft is located inside the reaction chamber, the driving device is installed on the top of the reaction vessel, and the driving shaft connects the driving device and the stirring shaft.

[0018] The technical effects achieved by adopting this technical solution are as follows: the drive device controls the drive shaft to rotate, and the stirring shaft rotates together with the drive shaft, which promotes the reaction and accelerates the heat exchange effect between the material in the reaction chamber and the first and second adhesive pipelines, thereby improving the heat removal effect.

[0019] Furthermore, the polymerization apparatus further includes: at least one additive pipeline, the additive pipeline connecting the top of the reactor and the partition, the additive pipeline communicating with the reaction chamber, and the additive pipeline being used to add a terminator, activator, or chain modifier.

[0020] The technical effects achieved by adopting this technical solution are as follows: Adding additives to the top of the reactor facilitates a full reaction with the materials in the upper part of the reaction chamber; a terminator is introduced into the additive pipeline to control the termination of the solution-polymerized styrene-butadiene (SBR) reaction, and an activator is used to promote the chain growth of SBR; the in-chain modifier is used to improve the performance of the SBR material.

[0021] Furthermore, the initiator pipeline connects the top of the reactor and the partition, and the initiator pipeline is connected to the reaction chamber.

[0022] The technical effect achieved by adopting this technical solution is that adding an initiator to the top of the reactor can start the reaction of materials in the reaction chamber.

[0023] Furthermore, the polymerization reaction apparatus also includes: a discharge pipeline and a discharge pump, wherein the discharge pipeline is connected to the bottom of the reaction chamber and the discharge pump is installed on the discharge pipeline.

[0024] The technical effect achieved by adopting this technical solution is as follows: the discharge pump is used to discharge the solution-polymerized styrene-butadiene rubber generated after the reaction from the reactor so that it can enter the post-processing unit for coagulation.

[0025] In summary, the above-mentioned technical solutions of this application can have one or more of the following advantages or beneficial effects: i) The circulating cooling pipeline outside the reactor can continuously supply low-temperature adhesive to the first adhesive pipeline and the second adhesive pipeline for heat removal; ii) The first adhesive pipeline can pre-cool the reaction solvent before the reaction to avoid violent subsequent reactions; iii) The second adhesive pipeline can dynamically circulate and remove heat during the reaction, allowing for more thorough contact with the material in the reactor, ensuring that the material is effectively cooled, resulting in better heat removal and a more uniform temperature distribution within the reactor, which is beneficial for controlling the structure and quality of solution-polymerized styrene-butadiene rubber. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a polymerization reaction apparatus provided by this utility model;

[0027] Figure 2 for Figure 1 Schematic diagram of the structure of the reaction vessel;

[0028] Figure 3 for Figure 2 Schematic diagram of the stirring device;

[0029] Figure 4 for Figure 2 A schematic diagram of the structure of the partition plate.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100 - Polymerization reactor; 110 - Reactor; 111 - Precooling chamber; 112 - Reaction chamber; 120 - Circulating cooling pipeline; 121 - Adhesive circulation pump; 122 - Adhesive cooler; 123 - Chilled water chamber; 124 - Adhesive pipeline; 130 - First adhesive pipeline; 140 - Second adhesive pipeline; 150 - Reaction solvent pipeline; 160 - Initiator pipeline; 170 - Partition plate; 171 - Through hole; 180 - Stirring device; 181 - Drive device; 182 - Drive shaft; 183 - Stirring shaft; 190 - Additive pipeline; 200 - Discharge pipeline; 201 - Discharge pump. Detailed Implementation

[0032] The purpose of this invention is to provide a polymerization reactor for producing chain-end functionalized solution-polymerized styrene-butadiene rubber, which achieves uniform heat removal within the solution-polymerized styrene-butadiene rubber reactor.

[0033] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0034] See Figures 1-4This utility model provides a polymerization reactor 100 for producing chain-terminal functionalized solution-polymerized styrene-butadiene rubber. The polymerization reactor 100 includes: a reactor 110, which has an upper precooling chamber 111 and a lower reaction chamber 112, which are connected; a circulating cooling pipe 120, a first adhesive pipe 130, and a second adhesive pipe 140. The circulating cooling pipe 120 is located outside the reactor 110, and the first adhesive pipe 130 and the second adhesive pipe 140 are connected to each other. The end is circulated through the circulating cooling pipe 120; the first adhesive pipe 130 passes through the precooling chamber 111 and the reaction chamber 112, and the part of the first adhesive pipe 130 located in the precooling chamber 111 is the first coil; the second adhesive pipe 140 passes through at least the reaction chamber 112, and the part of the second adhesive pipe 140 located in the reaction chamber 112 is the second coil; the reaction solvent pipe 150 is connected to the precooling chamber 111; the initiator pipe 160 is connected to the reaction chamber 112.

[0035] In this embodiment, the circulating cooling pipe 120 outside the reactor 110 can continuously supply low-temperature adhesive to the first adhesive pipe 130 and the second adhesive pipe 140 for heat removal. The first adhesive pipe 130 can pre-cool the reaction solvent before the reaction to avoid violent subsequent reactions. The second adhesive pipe 140 can dynamically circulate and remove heat during the reaction, allowing for more thorough contact with the material inside the reactor 110, ensuring that the material is effectively cooled, resulting in better heat removal and a more uniform temperature distribution within the reactor. This is beneficial for controlling the structure and quality of solution-polymerized styrene-butadiene rubber.

[0036] In one specific embodiment, the polymerization reaction apparatus 100 further includes a partition 170 located inside the reactor 110 and dividing the inner cavity of the reactor 110 into a precooling chamber 111 and a reaction chamber 112. The partition 170 has a through hole 171 for introducing reaction solvent through the reaction solvent pipeline 150.

[0037] It should be noted that the partition 170 is used to buffer the reaction solvent. The reaction solvent flows slowly in the precooling chamber 111 above the partition 170, and after being sufficiently cooled, it flows into the reaction chamber 112 through the through hole 171 to carry out the reaction, thereby improving the heat exchange effect of the precooling chamber 111.

[0038] Preferably, the through holes 171 are mainly distributed in the middle of the partition plate 170; or the through holes 171 gradually increase in area along the radial direction toward the center of the partition plate 170, so that the material in the center of the reaction chamber 112 reacts first and the heat can be evenly diffused outward.

[0039] Furthermore, the vias 171 are all located inside the first coil, and the opening of the reaction solvent connecting to the precooling chamber 111 is located outside the first coil, so that the reaction solvent flows through the opening first through the periphery of the first coil to achieve precooling, and then enters the vias 171 of the partition 170, thus making the precooling more effective.

[0040] In one specific embodiment, the first adhesive line 130 further includes a first straight pipe located in the reaction chamber 112, the first straight pipe and the first coil are installed on the partition 170 and are interconnected.

[0041] It should be noted that the first adhesive pipeline 130 is divided into two sections to facilitate installation and fixation with the partition plate 170. Since the temperature of the material is greater than the temperature of the adhesive during the reaction process, further heat exchange with the material through the first straight pipe also helps to stabilize the temperature of the reaction process. After heat exchange, the first straight pipe merges with the second adhesive pipeline 140 and can be used for refrigeration and heat exchange again after being circulated and cooled through the circulating cooling pipeline 120.

[0042] In one specific embodiment, the first straight tube is located outside the second coil.

[0043] It should be noted that the temperature of the adhesive solution in the second coil is lower than that in the first straight tube. The second coil is located on the inside, which can more effectively cool the reaction. The first straight tube is located on the outside, which can continue to cool the material that has been stirred to the outside but is at a higher temperature, thereby making the temperature inside the reactor 110 more uniform.

[0044] In one specific embodiment, the circulating cooling pipeline 120 is equipped with an adhesive circulation pump 121 and an adhesive cooler 122.

[0045] It should be noted that the adhesive circulation pump 121 is used to drive the flow of adhesive, so that the adhesive with a higher temperature after heat exchange leaves the reaction vessel 110, enters the adhesive cooler 122 for cooling, and then re-enters the first adhesive pipeline 130 and the second adhesive pipeline 140 for heat exchange.

[0046] In one specific embodiment, the adhesive cooler 122 includes a chilled water chamber 123 and an adhesive pipeline 124, with the adhesive pipeline 124 located inside the chilled water chamber 123.

[0047] It should be noted that the chilled water chamber 123 can continuously cool the adhesive pipeline 124 by introducing low-temperature water, which facilitates the circulation and cooling of the adhesive inside the reaction vessel 110.

[0048] In one specific embodiment, the polymerization reaction apparatus 100 further includes a stirring device 180, which includes a driving device 181, a driving shaft 182, and a stirring shaft 183. The stirring shaft 183 is located inside the reaction chamber 112, the driving device 181 is installed on the top of the reaction vessel 110, and the driving shaft 182 is connected to the driving device and the stirring shaft 183.

[0049] It should be noted that the drive device 181 controls the drive shaft 182 to rotate, and the stirring shaft 183 rotates together with the drive shaft 182, promoting the reaction and accelerating the heat exchange between the material in the reaction chamber 112 and the first adhesive pipe 130 and the second adhesive pipe 140, thereby improving the heat removal effect. The drive device 181 is a motor.

[0050] In one specific embodiment, the polymerization apparatus 100 further includes: at least one additive pipeline 190, the additive pipeline 190 being connected to the top of the reactor 110 and the partition 170, the additive pipeline 190 being connected to the reaction chamber 112, and the additive pipeline 190 being used to add a terminator, activator or chain modifier.

[0051] It should be noted that an additive is added to the top of the reactor 110 to facilitate a full reaction with the material in the upper part of the reaction chamber 112; a terminator is introduced into the additive pipeline 190 to control the termination of the solution-polymerized styrene-butadiene (SBR) reaction, an activator is used to promote the chain growth of SBR, and an in-chain modifier is used to improve the performance of the SBR material.

[0052] In one specific embodiment, the initiator line 160 is connected to the top of the reactor 110 and the partition 170, and the initiator line 160 is connected to the reaction chamber 112.

[0053] It should be noted that adding an initiator to the top of the reactor 110 can initiate the reaction of the materials inside the reaction chamber 112.

[0054] In one specific embodiment, the polymerization reaction apparatus 100 further includes: a discharge pipe 200 and a discharge pump 201, wherein the discharge pipe 200 is connected to the bottom of the reaction chamber 112 and the discharge pump 201 is installed on the discharge pipe 200.

[0055] It should be noted that the discharge pump 201 is used to discharge the solution polymerized styrene-butadiene rubber generated after the reaction from the reactor 110 so that it can enter the post-processing unit for coagulation.

[0056] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A polymerization apparatus for producing chain-terminal functionalized solution-polymerized styrene-butadiene rubber, characterized in that, The polymerization reactor includes: A reaction vessel having an upper precooling chamber and a lower reaction chamber, the precooling chamber and the reaction chamber being connected. The reactor includes a circulating cooling pipeline, a first adhesive pipeline, and a second adhesive pipeline. The circulating cooling pipeline is located outside the reactor. Both ends of the first and second adhesive pipelines circulate through the circulating cooling pipeline. The first adhesive pipeline passes through the precooling chamber and the reaction chamber, with the portion of the first adhesive pipeline in the precooling chamber forming a first coil. The second adhesive pipeline passes through at least the reaction chamber, with the portion of the second adhesive pipeline in the reaction chamber forming a second coil. A reaction solvent pipeline, wherein the reaction solvent pipeline is connected to the precooling chamber; An initiator line is connected to the reaction chamber.

2. The polymerization apparatus according to claim 1, characterized in that, The polymerization apparatus further includes a partition located inside the reactor and dividing the reactor's interior into a precooling chamber and a reaction chamber. The partition has a through-hole for introducing reaction solvent through the reaction solvent pipeline.

3. The polymerization apparatus according to claim 2, characterized in that, The first adhesive pipeline also includes a first straight pipe located in the reaction chamber. The first straight pipe and the first coil are installed on the partition and are interconnected.

4. The polymerization apparatus according to claim 3, characterized in that, The first straight pipe is located outside the second coil.

5. The polymerization apparatus according to claim 1, characterized in that, The circulating cooling pipeline is equipped with an adhesive circulation pump and an adhesive cooler.

6. The polymerization apparatus according to claim 5, characterized in that, The adhesive cooler includes a chilled water chamber and adhesive pipelines, with the adhesive pipelines located inside the chilled water chamber.

7. The polymerization apparatus according to claim 1, characterized in that, The polymerization apparatus further includes a stirring device, the stirring device comprising: The reactor includes a drive unit, a drive shaft, and a stirring shaft. The stirring shaft is located inside the reaction chamber, the drive unit is mounted on the top of the reactor, and the drive shaft connects the drive unit and the stirring shaft.

8. The polymerization apparatus according to claim 1, characterized in that, The polymerization apparatus further includes: at least one additive pipeline, the additive pipeline connecting the top of the reactor and the partition, the additive pipeline communicating with the reaction chamber, and the additive pipeline being used to add a terminator, activator or chain modifier.

9. The polymerization apparatus according to claim 1, characterized in that, The initiator pipeline connects the top of the reactor and the partition plate, and the initiator pipeline is connected to the reaction chamber.

10. The polymerization apparatus according to claim 1, characterized in that, The polymerization reaction apparatus further includes a discharge pipeline and a discharge pump, wherein the discharge pipeline is connected to the bottom of the reaction chamber and the discharge pump is installed on the discharge pipeline.

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