Device and method for preparing high-content rubber antioxidant
By using alkyl sulfonic acid liquid acid as a catalyst in the preparation process of rubber anti-aging agent, and carrying out the film-raising and falling film reaction in the condensation reactor, combined with the continuous polymerization process, the preparation of rubber anti-aging agent in the prior art is solved. The problems of many impurities, batch instability and low catalyst efficiency have been achieved, and efficient and stable rubber anti-aging agent production has been achieved.
Patent Information
- Application Number
- CN202310802632.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-30
- Publication Date
- 2024-12-31
AI Technical Summary
There are problems such as anti-mixing phenomenon, many impurities, batch unstable product, low catalyst conversion rate and inconvenience in industrial production in the preparation process of existing rubber anti-aging agents, especially the catalyst used in the condensation step has low conversion rate and impurities. High content and serious pollution.
Using a device including a condensation reactor and a polymerization reaction unit, the alkyl sulfonic acid liquid acid is used as a condensation catalyst, and the reactants are subjected to the rising film and falling film movement in the condensation reactor. After the condensation reaction, the polymerization reaction is carried out under the action of the polymerization catalyst. , improve product stability and automation level through continuous polymerization process.
Effectively reduce the condensation time and catalyst usage, improve product quality, reduce impurity content, improve product stability and automation level between batches, reduce production costs, and obtain high effective body content of rubber anti-aging agent, reaching international leading level.
Smart Images
Figure CN119215782A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of industrial synthesis technology, and in particular to a device and method for preparing a high-content rubber antioxidant. Background Art
[0002] Rubber antioxidant is a ketoamine antioxidant. It has good protection against thermal oxidative aging, strong inhibitory effect on metal catalytic oxidation, low toxicity, and is widely used in a variety of synthetic rubber and natural rubber products, making rubber have long-term resistance to thermal aging and preventing the rubber from being catalytically oxidized by metals. The existing synthesis process of rubber antioxidants can be roughly divided into "one-step method" or "two-step method". "One-step method" is that the reaction materials undergo condensation and polymerization reaction under the action of a catalyst. "Two-step method" is that the reaction materials undergo condensation reaction under the action of a catalyst, and the condensation reaction liquid is treated to obtain a rubber antioxidant monomer, and then a polymerization reaction occurs under the action of a catalyst to obtain a polymer of the rubber antioxidant.
[0003] At present, the condensation step of producing rubber antioxidant TMQ adopts a kettle reactor, which has the problems of reverse mixing, many impurities and low aniline conversion rate. The two-step polymerization step adopts intermittent kettle polymerization, which has the problems of unstable products between batches, high labor requirements, and difficulty in mass production. In addition, the condensation catalysts in the related art mainly include the following: hydrochloric acid, which has the disadvantages of low conversion rate, high impurity content, and many three wastes; macroporous strong acid sulfonic acid type ion exchange resin, which has the disadvantages of low effective acid content, poor heat resistance, and long reaction time; toluene sulfonic acid catalyst, which has the disadvantages of many impurities, serious pollution and is not conducive to industrial production; solid acid catalyst, which has the disadvantages of difficult transportation and large investment.
[0004] Therefore, the current apparatus and method for preparing rubber antioxidants still need to be improved. Summary of the invention
[0005] In view of the deficiencies in the prior art, the purpose of the present application is to provide a device and method for preparing a rubber antioxidant to solve the problems raised in the above background technology.
[0006] In one aspect of the present invention, the present invention provides a device for preparing a rubber antioxidant, comprising a condensation reactor and a polymerization reaction unit, wherein the condensation reactor comprises a first reactant inlet located at the top of the reactor, a second reactant inlet located at the bottom of the reactor, and a condensation product outlet; the polymerization reaction unit is connected to the condensation product outlet of the condensation reactor.
[0007] Further, the condensation reactor comprises a rising film reactor, and the reactants perform rising film or falling film movement in the condensation reactor.
[0008] Furthermore, the device comprises a raw material premixing unit, the raw material premixing unit is connected to the first reactant inlet, and the raw material premixing unit comprises a condensation catalyst inlet, a first material inlet and a heating element.
[0009] Furthermore, the polymerization reaction unit includes at least one primary polymerization reactor and a plurality of secondary polymerization reactors.
[0010] Furthermore, the primary polymerization reactor is connected to the condensation product outlet and has a polymerization catalyst inlet, and the secondary polymerization reactor is connected to the primary polymerization reactor.
[0011] Furthermore, the device includes at least one of the following units: a gasification unit, which is connected to the second reactant inlet of the condensation reactor; a first material recovery unit, which is respectively connected to the condensation reactor and the polymerization reaction unit; a second material recovery unit, which is connected to the condensation reactor; and a post-processing unit, which is connected to the polymerization reaction unit.
[0012] In another aspect of the present invention, the present invention provides a method for preparing a rubber antioxidant using the device, comprising: adding a first reactant into the condensation reactor from the top of the condensation reactor, and adding a second reactant into the condensation reactor from the bottom of the condensation reactor, so that the first reactant undergoes a falling film motion in the condensation reactor, and the second reactant undergoes an ascending film motion in the condensation reactor, and the two reactants converge from different directions and undergo a condensation reaction; and supplying the product of the condensation reaction to a polymerization reaction unit, so that a polymerization reaction occurs under the action of the polymerization catalyst.
[0013] Furthermore, the condensation reaction occurs under the action of a condensation catalyst, the condensation catalyst includes an alkyl sulfonic acid type liquid acid, and the alkyl sulfonic acid type liquid acid includes an aromatic sulfonic acid.
[0014] Furthermore, the method satisfies at least one of the following conditions: the first reactant includes the condensation catalyst and a first material, the first material includes aniline; the content of the condensation catalyst is not higher than 0.8wt%; the first reactant is supplied to the condensation reactor after preheating, and the preheating temperature is 100-130°C; the second reactant includes acetone; the second reactant is supplied to the condensation reactor after being gasified in advance; the mass ratio of the second reactant supplied to the condensation reactor to the first material is not higher than 3:1.
[0015] Furthermore, the condensation reaction temperature is 100-140° C., and the reaction time is 0.5-2 hours.
[0016] Furthermore, the method includes: collecting the second reactant vapor from the top of the condensation reactor to recover the second reactant.
[0017] Furthermore, before supplying the product of the condensation reaction to a polymerization reaction unit, the method further comprises distilling the product of the condensation reaction to recover the first material.
[0018] Furthermore, the polymerization reaction includes a primary polymerization reaction and a secondary polymerization reaction. The temperature of the primary polymerization reaction is 80-95°C; the temperature of the secondary polymerization reaction is 95-110°C.
[0019] Furthermore, after the polymerization reaction, the polymerization product is subjected to post-treatment, and the post-treatment includes at least one of neutralization, phase separation and distillation.
[0020] Furthermore, the rubber antioxidant is obtained by utilizing the above device or the above method.
[0021] Furthermore, the rubber antioxidant includes TMQ, and the effective body content in the rubber antioxidant is not less than 80%; the sum of the content of dimer and trimer in the rubber antioxidant is not less than 70%.
[0022] Beneficial effects of this application:
[0023] 1. The present application adopts alkyl sulfonic acid type liquid acid as condensation catalyst, which greatly reduces the condensation time and ketoamine ratio, reduces the impurity content in the product of the condensation reaction, reduces the amount of catalyst used, and saves production costs.
[0024] 2. The device for preparing rubber antioxidant of the present application adopts continuous polymerization, and the product quality between batches is more stable, the automation level is improved, and it is easy to mass produce.
[0025] 3. The rubber antioxidant obtained in this application has a high content of effective bodies and the product quality reaches the international leading level.
[0026] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.
[0028] Figure 1 This is a schematic structural diagram of a device for preparing a rubber antioxidant according to an embodiment of the present invention;
[0029] Figure 2 This is a schematic structural diagram of a device for preparing a rubber antioxidant according to an embodiment of the present invention;
[0030] Figure 3 The present invention is a flowchart of a method for preparing a rubber antioxidant according to an embodiment of the present invention.
[0031] Description of the drawings: 100-condensation reactor, 110-first reactant inlet, 120-second reactant inlet, 130-condensation product outlet, 200-polymerization reaction unit, 210-primary polymerization reactor, 220-secondary polymerization reactor, 300-raw material premixing unit, 310-condensation catalyst inlet, 320-first material inlet, 330-heating element, 400-gasification unit, 510-first material distillation tower, 520-first material recovery tank, 600-second material recovery unit, 700-post-processing unit. DETAILED DESCRIPTION
[0032] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.
[0033] In one aspect of the present invention, the present invention provides a device for preparing a rubber antioxidant. Figure 1 The device comprises a condensation reactor 100 and a polymerization reaction unit 200, wherein the condensation reactor 100 comprises a first reactant inlet 110 located at the top of the reactor, a second reactant inlet 120 located at the bottom of the reactor, and a condensation product outlet 130. In the condensation reactor 100, the first reactant moves downward from the top, and the second reactant moves upward from the bottom, and the two meet and undergo a condensation reaction. The polymerization reaction unit 200 is connected to the condensation product outlet 130 of the condensation reactor 100 so that a polymerization reaction occurs under the action of a polymerization catalyst. The device has at least the following beneficial effects: reducing condensation time, reducing catalyst dosage, saving production costs, stabilizing product quality, improving automation level, facilitating mass production, and having high output.
[0034] For ease of understanding, the following first briefly describes the principle by which the device can achieve the above beneficial effects:
[0035] The device can be used to prepare rubber antioxidant TMQ (polymer of 2,2,4-trimethyl-1,2-dihydroquinoline), where acetone and aniline are first subjected to condensation reaction under the action of a condensation catalyst, and then polymerized in a polymerization reaction unit 200 under the action of a polymerization catalyst to obtain a TMQ product. The condensation reactor 100 is fed from the top and the bottom respectively, and the first reactant and the second reactant move in opposite directions in the condensation reactor 100, thereby improving the efficiency of the condensation reaction and reducing the reaction time and the amount of catalyst used.
[0036] According to an embodiment of the present invention, the condensation reactor 100 in the device includes a rising film reactor, and in the condensation reactor 100, the first reactant moves downward from the top of the reactor in a descending film motion, and the second reactant moves from the bottom of the reactor in an ascending film motion, and they converge from different directions to react.
[0037] refer to Figure 2 In order to further improve the efficiency of the condensation reaction, the device may further include a raw material premixing unit 300. The condensation catalyst is allowed to enter the raw material premixing unit 300 from the condensation catalyst inlet 310, and the first material is allowed to enter the raw material premixing unit 300 from the first material inlet 320, so that the condensation catalyst and the first material are mixed and preheated under the action of the heating element 330 to obtain the first reactant. For example, in some embodiments, the first reactant may be aniline and the condensation catalyst, and the second reactant may be acetone. Acetone and aniline have different directions in the condensation reactor 100, so that the reactants are fully in contact with each other, which can increase the reaction efficiency, reduce the ketoamine ratio in the material, and reduce the amount of the condensation catalyst.
[0038] According to an embodiment of the present invention, acetone may be supplied to the condensation reactor 100 after being gasified in advance. Specifically, the device may include a gasification unit 400 connected to the second reactant inlet 120 of the condensation reactor 100. After being processed by the gasification unit 400, the acetone may be introduced from the second reactant inlet 120 at the bottom of the condensation reactor 100. The gaseous acetone may move better from the bottom to the top of the condensation reactor 100, increase the contact area with the first reactant, and thus further improve the efficiency of the condensation reaction performed in the condensation reactor 100.
[0039] According to an embodiment of the present invention, the device may further include a first material recovery unit. The first material recovery unit is between the condensation reactor 100 and the polymerization reaction unit 200, connected to the condensation product outlet 130, and is used to recover the first material that has not reacted completely. The first material recovery unit may include a first material distillation tower 510 and a first material recovery tank 520. The first material that has not reacted completely enters the first material recovery tank 520 through distillation in the first material distillation tower 510 and is collected, and the collected first material can be reused. Specifically, the first material can be aniline. After being processed by the first material distillation tower 510, aniline can enter the first material recovery tank 520 from the top of the distillation tower, and the remaining material in the tower bottom can be supplied to the polymerization reaction unit to continue the subsequent polymerization reaction.
[0040] According to an embodiment of the present invention, the device may further include a second material recovery unit 600. The second material recovery unit 600 may be located at the top of the condensation reactor 100. Since the acetone entering the condensation reactor 100 is gasified and remains in a gasified state in the condensation reactor 100, the acetone that is not completely reacted may be directly collected at the top. Alternatively, a second material recovery port may be provided at other locations of the condensation reactor 100 and connected to the second material recovery unit 600. The remaining portion after the second material is recovered (for example, it may include a portion of the condensation product and the first material, etc.) may be supplied to the condensation reactor 100 for circulation.
[0041] According to an embodiment of the present invention, the specific composition of the polymerization reaction unit 200 is not particularly limited, as long as the polymerization reaction can be carried out. For example, the polymerization reaction unit 200 may include at least one primary polymerization reactor 210 and a plurality of secondary polymerization reactors 220, specifically, one primary polymerization reactor 210 and two secondary polymerization reactors 220. The primary polymerization reactor 210 is connected to the condensation product outlet 130 before the secondary polymerization reactor 220. The condensation product after the condensation reaction first flows into the primary polymerization reactor 210 for a primary polymerization reaction to obtain a primary polymerization liquid, and then the primary polymerization liquid flows into a plurality of interconnected secondary polymerization reactors 220 for a secondary polymerization reaction to obtain a secondary polymerization liquid.
[0042] According to an embodiment of the present invention, the post-processing unit 700 is connected to the secondary polymerization reactor 220. The specific components and functions of the post-processing unit 700 are not particularly limited, and those skilled in the art can set them according to the specific conditions of the materials obtained from the secondary polymerization reactor 220. For example, in some embodiments, the post-processing unit 700 can perform treatment steps including dilution, neutralization, phase separation, and distillation. Specifically, the secondary polymerization liquid in the secondary polymerization reactor 220 flows into the post-processing unit 700, which can be diluted first, and then neutralized. After static phase separation, a phase containing TMQ is distilled with a distillation tower to finally obtain a rubber antioxidant. In addition, the remaining materials in the distillation tower in the post-processing unit 700 can be repeatedly supplied to the secondary polymerization reactor 220, which can further improve the utilization rate of raw materials.
[0043] According to the embodiment of the present invention, the device adopts continuous polymerization, the quality of products between batches is more stable, the level of automation is improved, and mass production is easy.
[0044] According to an embodiment of the present invention, the device can be used for rubber antioxidant products such as TMQ produced based on aniline and acetone, including but not limited to, and can also be used for product systems that require condensation and polymerization reactions. For example, one of the reactants is easy to gasify, that is, it can be supplied through the bottom of the condensation reactor, and the other part of the reactants is a liquid phase, which can be supplied through the top of the condensation reactor, so that the reactants flow in the condensation reactor in different directions to improve the efficiency of the condensation reaction. The polymerization reaction can be continuous polymerization, and the polymerization liquid stagnates and flows to the next-level polymerization reactor, which can improve the efficiency of the polymerization reaction, reduce labor costs, and improve the degree of automation of the device.
[0045] In another aspect of the present invention, the present invention provides a method for preparing a rubber antioxidant using the above-mentioned device. Figure 3 , the method comprises: adding the first reactant and the second reactant to the condensation reactor 100, and causing a condensation reaction under the action of a condensation catalyst; supplying the product of the condensation reaction to the polymerization reaction unit 200, and causing a polymerization reaction under the action of a polymerization catalyst. Specifically, the first reactant is added from the top of the condensation reactor 100, and the second reactant is added from the bottom of the condensation reactor 100, so that the first reactant is subjected to a falling film motion in the condensation reactor 100, and the second reactant is subjected to a rising film motion in the condensation reactor 100, and the two reactants are converged from different directions and a condensation reaction occurs. Then, the condensation product after the condensation reaction is allowed to flow into the polymerization reaction unit 200 for a polymerization reaction. The method has at least the following beneficial effects: reducing the condensation time, reducing the amount of catalyst used, saving production costs, and high output.
[0046] According to an embodiment of the present invention, referring to Figure 1The condensation reaction is carried out by adding the first reactant into the condensation reactor 100 from the top of the condensation reactor 100, and adding the second reactant into the condensation reactor 100 from the bottom of the condensation reactor 100, so that the two are fully contacted, and the condensation reaction occurs under the action of the condensation catalyst. Specifically, the first reactant includes a condensation catalyst and a first material, and the first material includes aniline; the content of the condensation catalyst in the first reactant is not higher than 0.8wt%; the first reactant is supplied to the condensation reactor 100 after preheating, and the preheating temperature is 100-130°C; the second reactant includes acetone; the second reactant is supplied to the condensation reactor 100 after being gasified in advance; the mass ratio of the second reactant supplied to the condensation reactor 100 to the first material is not higher than 3:1. In addition, the temperature of the condensation reaction is 100-140°C, and the reaction time is 0.5-2 hours.
[0047] According to an embodiment of the present invention, the condensation catalyst includes an alkyl sulfonic acid type liquid acid. The alkyl sulfonic acid type liquid acid has a good catalytic effect, can improve the conversion rate of aniline in the condensation reaction, and thus produces fewer side reaction products, which can reduce the content of impurities in the condensation reaction product. In addition, the liquid acid catalyst is also easy to transport in the reaction unit, and can be mixed with the first material and then transported to the condensation reaction unit 200. In addition, the condensation catalyst is an organic component, which can be recovered by phase separation, distillation and the like, so the waste water of the condensation reaction is also easier to handle. According to an embodiment of the present invention, the specific composition of the alkyl sulfonic acid type liquid acid is not particularly limited, and those skilled in the art can select it according to actual conditions. For example, an alkane sulfonic acid or an aromatic sulfonic acid can be selected as a condensation catalyst.
[0048] According to an embodiment of the present invention, the method further includes collecting acetone vapor from the top of the condensation reactor 100 to recover the acetone. Before the product of the condensation reaction is supplied to the polymerization reaction unit 200, the method may further include distilling the product of the condensation reaction to recover the aniline that has not reacted completely in the condensation reaction product. The tower bottom material after distillation can be supplied to the polymerization reaction unit 200 to undergo polymerization reaction under the action of a polymerization catalyst, and the recovered aniline can be recycled.
[0049] According to an embodiment of the present invention, the polymerization reaction includes a continuous two-stage autoclave polymerization reaction, specifically, a primary polymerization reaction and a secondary polymerization reaction, and the polymerization liquid produced by the primary polymerization reaction is subjected to a secondary polymerization reaction. The temperature of the primary polymerization reaction is 80-95°C, and the temperature of the secondary polymerization reaction is 95-110°C.
[0050] According to an embodiment of the present invention, after the polymerization reaction, the polymerization product is further subjected to post-treatment, and the post-treatment includes at least one of dilution, neutralization, phase separation and distillation. For example, the polymerization liquid can be first diluted with toluene and then neutralized with alkali solution. After static phase separation, a portion containing the product is distilled with a distillation tower to further purify the polymerization liquid, thereby finally obtaining a rubber antioxidant. The remaining material obtained by the distillation process can continue to undergo a secondary polymerization reaction to improve the utilization rate of the reactants.
[0051] According to an embodiment of the present invention, the rubber antioxidant finally obtained includes TMQ. The effective body content in the rubber antioxidant is not less than 80%; and the sum of the dimer and trimer contents in the rubber antioxidant is not less than 70%.
[0052] In general, the device and method for preparing rubber antioxidant proposed by the present invention adopt alkyl sulfonic acid type liquid acid as condensation catalyst, and make two reaction materials pass through rising film and falling film process respectively in condensation reactor 100, and converge from different directions to react, so that the condensation time can be reduced from 4 hours to 2 hours, and the ketoamine ratio can be reduced from 4:1 to 3:1. The impurity content of condensation liquid is also reduced from the original 20% to 10%, and the amount of catalyst is less than 0.8%. The amount of catalyst is small, which saves production cost. A continuous two-stage autoclave polymerization reaction is adopted, and the product of the first polymerization reactor is supplied to the second polymerization reactor through silt flow, and the polymerization liquid in the second polymerization reactor can also enter the post-processing unit through silt flow, thereby improving the automation level and reducing labor cost.
[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive.
[0054] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A device for preparing a rubber antioxidant, characterized in that: It includes a condensation reactor and a polymerization reaction unit. The condensation reactor comprises a first reactant inlet at the top of the reactor, a second reactant inlet at the bottom of the reactor, and a condensation product outlet; The polymerization reaction unit is connected to a condensation product outlet of the condensation reactor.
2. The device according to claim 1, characterized in that The condensation reactor includes a rising film reactor, and the reactants perform rising film or falling film movement in the condensation reactor.
3. The device according to claim 1, characterized in that It further comprises a raw material premixing unit, which is connected to the first reactant inlet, and comprises a condensation catalyst inlet, a first material inlet and a heating element.
4. The device according to claim 1, characterized in that The polymerization reaction unit comprises at least one primary polymerization reactor and a plurality of secondary polymerization reactors.
5. The device according to claim 4, characterized in that The primary polymerization reactor is connected to the condensation product outlet and has a polymerization catalyst inlet; The secondary polymerization reactor is connected to the primary polymerization reactor.
6. The device according to claim 1, characterized in that Includes at least one of the following units: a gasification unit connected to the second reactant inlet of the condensation reactor; A first material recovery unit, wherein the first material recovery unit is connected to the condensation reactor and the polymerization reaction unit respectively; a second material recovery unit, wherein the second material recovery unit is connected to the condensation reactor; A post-processing unit is connected to the polymerization reaction unit.
7. A method for preparing a rubber antioxidant using the device according to any one of claims 1 to 6, characterized in that: include: Adding a first reactant into the condensation reactor from the top of the condensation reactor, and adding a second reactant into the condensation reactor from the bottom of the condensation reactor, so that the first reactant performs a falling film motion in the condensation reactor, and the second reactant performs a rising film motion in the condensation reactor, and the reactants merge from different directions and undergo a condensation reaction; The product after the condensation reaction is supplied to a polymerization reaction unit to undergo a polymerization reaction under the action of the polymerization catalyst.
8. The method according to claim 7, characterized in that The condensation reaction occurs under the action of a condensation catalyst, which includes an alkyl sulfonic acid type liquid acid, and the alkyl sulfonic acid type liquid acid includes an aromatic sulfonic acid.
9. The method according to claim 7, characterized in that: The method satisfies at least one of the following conditions: The first reactant includes the condensation catalyst and a first material, and the first material includes aniline; The condensation catalyst content is not higher than 0.8wt%; The first reactant is supplied to the condensation reactor after being preheated, and the preheating temperature is 100-130° C.; The second reactant includes acetone; The second reactant is supplied to the condensation reactor after being gasified in advance; The mass ratio of the second reactant to the first material supplied to the condensation reactor is no higher than 3:
1.
10. The method according to claim 7, characterized in that The condensation reaction temperature is 100-140° C., and the reaction time is 0.5-2 hours.
11. The method according to claim 7, characterized in that Further including: The second reactant vapor is collected from the top of the condensation reactor to recover the second reactant.
12. The method according to claim 7, characterized in that Before supplying the product of the condensation reaction to a polymerization reaction unit, the method further comprises distilling the product of the condensation reaction to recover the first material.
13. The method according to claim 7, characterized in that The polymerization reaction includes a primary polymerization reaction and a secondary polymerization reaction. The temperature of the primary polymerization reaction is 80-95°C; The temperature of the secondary polymerization reaction is 95-110°C.
14. The method according to claim 7, characterized in that After the polymerization reaction, the process further comprises post-processing the polymerization product; The post-treatment includes at least one of neutralization, phase separation and distillation.
15. A rubber antioxidant, characterized in that: The rubber antioxidant is obtained by using the device described in any one of claims 1 to 6, or the method described in any one of claims 7 to 14.
16. The rubber antioxidant according to claim 15, characterized in that: The rubber antioxidant includes TMQ, The effective content of the rubber antioxidant is not less than 80%; The sum of the content of dimer and trimer in the rubber antioxidant is not less than 70%.