Rubber accelerator oxidation process and feeding device

Abstract

This invention discloses a rubber accelerator oxidation process and feeding device, including a reaction vessel body, which comprises a reaction tank, an end cap, and an air inlet. A feeding mechanism is provided on the reaction vessel body, comprising a feeding tank, a processing tank, and a feed inlet. The feed inlet is located on the processing tank, and the output end of the feeding tank is connected to the feed end of the end cap. A dispersion component is provided on the processing tank, which is used to separate accelerators in a viscous or agglomerated state. This rubber accelerator oxidation process and feeding device utilizes the dispersion component to disperse viscous or agglomerated accelerators, effectively preventing incomplete oxidation during subsequent oxidation processes. Simultaneously, the detection and processing component effectively detects and reprocesses the accelerators, reducing the entry of viscous or agglomerated accelerators into the oxidation process, thereby further improving the product quality of the accelerator.

Description

Technical Field

[0001] This invention relates to the field of rubber accelerator preparation technology, specifically to a rubber accelerator oxidation process and feeding device. Background Technology

[0002] Rubber accelerators refer to rubber vulcanization accelerators. Rubber vulcanization primarily uses sulfur, but the reaction between sulfur and rubber is very slow. Therefore, vulcanization accelerators are needed to participate in the reaction. Adding accelerators to rubber compounds activates the vulcanizing agent, thereby accelerating the cross-linking reaction between the vulcanizing agent and rubber molecules, achieving the effect of shortening vulcanization time and lowering vulcanization temperature. The main vulcanization accelerators used are classified by chemical structure into sulfenamides, thiazoles, thiurams, and some guanidines, thioureas, and dithiocarbamates. Among these, sulfenamides have the best overall performance and are the most widely used.

[0003] In the rubber production process, adding a small amount of accelerator can accelerate the reaction between rubber and vulcanizing agent. On the one hand, it increases the vulcanization speed and lowers the vulcanization temperature, and on the other hand, it reduces the amount of vulcanizing agent used. At the same time, the accelerator can effectively improve the physical properties of rubber, such as tensile strength, tensile strength, abrasion resistance and hardness, and also improve the aging resistance of vulcanized rubber. In the process of preparing rubber accelerator, the raw materials undergo condensation reaction, oxidation reaction, filtration, washing and spin drying in sequence. The resulting wet product then undergoes drying, crushing, sieving and packaging steps.

[0004] In the oxidation process of accelerators, the raw materials undergoing condensation reaction need to be fed into the reactor through a feeding mechanism, and then the relevant oxidant is added to the reactor for oxidation. Because the raw materials after the condensation reaction are partially sticky (some raw materials with high moisture content tend to stick together with adjacent raw materials during the reaction due to their own viscosity), and agglomeration is also prone to occur during granulation (related to the suspension properties, flowability, and solid content of the materials), the sticky or agglomerated raw materials are prone to incomplete oxidation during the subsequent oxidation reaction when the raw materials are added to the reactor, affecting the product quality of the accelerator. Therefore, we propose an oxidation process and feeding device for rubber accelerators. Summary of the Invention

[0005] The purpose of this invention is to provide a rubber accelerator oxidation process and feeding device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an oxidation process for rubber accelerators, comprising the following oxidation processes:

[0007] S1. Raw material selection: Accelerator M, solvent, catalyst;

[0008] S2. Add the accelerator M into the reactor body, then add solvent to dissolve the accelerator M, and add a small amount of catalyst;

[0009] S3. Introduce oxygen into the reactor body until the oxygen level no longer decreases;

[0010] S4, cooling and suction filtration;

[0011] S5. Recover the catalyst, reduce pressure, distill, and dry to obtain the oxidized promoter;

[0012] During the oxidation process described above, the accelerator requires a corresponding feeding device to assist in the oxidation process. Specifically, this involves a rubber accelerator oxidation feeding device, including a reaction vessel body. The reaction vessel body includes a reaction tank, an end cap, and an air inlet. The reaction vessel body is equipped with a feeding mechanism, which includes a feeding tank, a processing tank, and a feed inlet. The feed inlet is located on the processing tank, and the output end of the feeding tank is connected to the feed end of the end cap. The processing tank is equipped with a dispersion component, which is used to separate the accelerator in an agglomerated or clumped state.

[0013] Preferably, the dispersion component includes a servo motor disposed at the end of the processing tank, and the output end of the servo motor penetrates through the outer wall of the processing tank and extends into its interior. A rotating shaft is disposed on the output end of the servo motor, and a plurality of dispersion rods are disposed on the rotating shaft. The dispersion rods are composed of a circular sleeve and a plurality of dispersion blades, and the dispersion blades are distributed in a ring at equal intervals on the circular sleeve. A plurality of arc-shaped baffles are installed inside the processing tank, and a detection and processing component is disposed at one end of the arc-shaped baffles.

[0014] Preferably, the dispersing leaf is arranged in an arc shape on a circular sleeve.

[0015] Preferably, a preliminary screening frame is installed on the processing tank, and the preliminary screening frame has a cavity inside. Multiple filter holes are provided inside the processing tank to prevent the adhesion or agglomeration of the promoter. The preliminary screening frame is provided with a discharge port, and the discharge port is provided with an output pipe for connecting to the end cap. The end of the output pipe penetrates the inner wall of the end cap and extends into the interior of the reaction tank.

[0016] Preferably, both the preliminary screening frame and the processing tank are provided with multiple vents.

[0017] Preferably, the detection and processing component includes a limiting frame disposed at one end of the arc-shaped baffle, and multiple limiting frames are disposed inside the processing tank and correspond to the arc-shaped baffle. The limiting frame is provided with a Y-shaped groove, and the Y-shaped groove is used to limit the movement state of the accelerator.

[0018] Preferably, the rotating shaft is provided with multiple connecting rods, wherein a turntable is provided on the connecting rods, the turntable is located on one side of the limiting frame, and a separation frame is provided on the side of the turntable away from the limiting frame. The sidewalls of the limiting frame, the turntable and the separation frame are all provided with multiple circular grooves, and the circular grooves are in a connected state. Holes are provided on the circular grooves on the separation frame. Cutting blades are provided inside the circular grooves on the turntable, and multiple strip grooves are provided on the turntable.

[0019] Preferably, the height of the strip groove is greater than the diameter of the hole groove, and the diameter of the circular groove is greater than the height of the strip groove.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This invention utilizes a dispersion component to disperse accelerators that are sticking together or agglomerated, effectively preventing incomplete oxidation during the subsequent oxidation process. At the same time, a detection and processing component can effectively detect and reprocess the accelerators to reduce the amount of accelerators that are sticking together or agglomerated into a whole entering the oxidation process, thereby further improving the product quality of the accelerators.

[0022] 2. This invention utilizes arc-shaped dispersing blades to allow the accelerator to interact with the arc-shaped baffle, the inner wall of the treatment tank, and the dispersing blades. The force generated by the impact can effectively separate or reduce the adhesion between accelerators that are bonded or agglomerated into a whole, thereby improving the dispersion efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram showing the overall structure of the present invention separated from the rest of the invention;

[0025] Figure 3 This is a schematic diagram showing the separation of the feeding mechanism and its components according to the present invention;

[0026] Figure 4 This is a partial cross-sectional schematic diagram of the feeding mechanism of the present invention;

[0027] Figure 5 This is a cross-sectional view of a partial structure of the feeding mechanism of the present invention from another angle;

[0028] Figure 6 This is a schematic cross-sectional view of the tank structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the front structure of the internal structure of the tank in this invention.

[0030] Figure 8 This is a partial structural diagram of the dispersion component of the present invention;

[0031] Figure 9 This is a schematic diagram of the front structure of the arc-shaped baffle and the detection and processing component of the present invention;

[0032] Figure 10 This is a schematic diagram showing the separation of the detection and processing components of the present invention;

[0033] Figure 11 For the present invention Figure 10 Enlarged schematic diagram of the structure of region A in the middle;

[0034] Figure 12 This is a schematic diagram of the limiting frame structure of the present invention;

[0035] Figure 13 This is a schematic diagram of the turntable structure of the present invention.

[0036] In the diagram: 1-Reaction vessel body; 2-Feeding mechanism; 3-Dispersion component; 4-Preliminary screening frame; 5-Ventilation port; 11-Reaction tank; 12-End cap; 13-Air inlet; 21-Feeding tank; 22-Processing tank; 23-Feed inlet; 31-Servo motor; 32-Rotating shaft; 33-Dispersion rod; 331-Circular sleeve; 332-Dispersion blade; 34-Arc-shaped baffle; 35-Detection and processing component; 41-Cavity; 42-Filter hole; 43-Discharge port; 44-Output pipe; 351-Limiting frame; 352-Y-shaped groove; 353-Connecting rod; 354-Turntable; 355-Separation frame; 356-Circular groove; 357-Groove; 358-Cutting blade; 359-Strip groove. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] The present invention mainly addresses the related problems mentioned in the background art above, specifically: during the preparation of accelerators, some accelerators are in a state of adhesion or agglomeration, which makes it easy for incomplete oxidation to occur during the subsequent oxidation process, thus affecting the product quality of the accelerator. In order to solve the above problems, the present invention proposes an oxidation process for rubber accelerators.

[0039] Please see Figure 1-13 The present invention provides a technical solution: an oxidation process for rubber accelerators, comprising the following oxidation processes:

[0040] S1. Raw material selection: Accelerator M, solvent, catalyst;

[0041] S2. Add the accelerator M into the reactor body 1, then add solvent to dissolve the accelerator M, and add a small amount of catalyst.

[0042] S3. Introduce oxygen into the reactor body 1 until the oxygen level no longer decreases;

[0043] S4, cooling and suction filtration;

[0044] S5. Recover the catalyst, reduce pressure, distill, and dry to obtain the oxidized promoter;

[0045] The advantages of the above process using catalytic oxidation with oxygen as the oxidant are fast reaction rate, good reaction selectivity, good product quality, high yield, and virtually no pollution.

[0046] During the oxidation process described above, the accelerator requires a corresponding feeding device to assist in the oxidation. Specifically, this involves a rubber accelerator oxidation feeding device, including a reactor body 1. The reactor body 1 includes a reaction vessel 11, an end cap 12, and an air inlet 13. A feeding mechanism 2 is installed above the reactor body 1, and the feeding mechanism 2 includes a feeding tank 21, a processing tank 22, and a feed inlet 23. Further, the feed inlet 23 is located on the processing tank 22, at the end of the processing tank 22 furthest from the feeding tank 21. The output end of the feeding tank 21 is connected to the feed end of the end cap 12. The body 22 is equipped with a dispersion component 3, which is used to separate the accelerator in a sticky or agglomerated state. Multiple vents 5 are installed at the end of the processing tank 22 away from the feeding tank 21. Before the actual reaction, the operator connects the ventilation pipe to the vent 5. The accelerator enters the processing tank 22 through the feed port 23 and moves from the inside of the processing tank 22 to the feeding tank 21 by the action of gas. During the movement, the dispersion component 3 disperses the accelerator that is sticky or agglomerated into a whole block to ensure that the accelerator entering the reactor body 1 can be oxidized.

[0047] As a further limitation of this embodiment, as shown in the appendix Figure 2 As shown: The dispersion assembly 3 includes a servo motor 31 fixedly installed at the end of the processing tank 22. The output end of the servo motor 31 penetrates the outer wall of the processing tank 22 and extends into its interior. A rotating shaft 32 is connected to the output end of the servo motor 31, and multiple dispersion rods 33 are fixedly installed on the rotating shaft 32. Each dispersion rod 33 consists of a circular sleeve 331 and multiple dispersion blades 332. The circular sleeve 331 is fixedly installed on the rotating shaft 32, and the dispersion blades 332 are evenly distributed in a ring on the circular sleeve 331. Further, the dispersion blades 332 are installed in an arc shape on the circular sleeve 331, as shown in the attached figure. Figure 8 As shown: the dispersion blades 332 on the second dispersion member are located between the dispersion blades 332 on the first dispersion member, and the third dispersion member is the same as the first dispersion member. This method facilitates better contact with the accelerator. The processing tank 22 is equipped with multiple arc-shaped baffles 34, and a detection and processing component 35 is provided at one end of the arc-shaped baffles 34. To further explain, the arc-shaped baffles 34 are arranged in a hook shape, and there is a certain gap between the arc-shaped baffles 34.

[0048] Specifically, when the accelerator enters the processing tank 22 through the feed inlet 23, the accelerator moves in a directional manner within the processing tank 22 under the influence of gas introduced through the vent 5. Simultaneously, the servo motor 31 starts, and its output drives the rotating shaft 32 to rotate (for the attached...). Figure 7 As shown in the diagram, the rotating shaft 32 rotates clockwise, causing the rotating shaft 32 to drive the dispersing blades 332 to rotate synchronously via the circular sleeve 331. During rotation, the arc-shaped surface of the dispersing blades 332 contacts and acts on the accelerator undergoing directional movement. After being acted upon by the dispersing blades 332, the accelerator will perform corresponding actions depending on the location of the force. The accelerator located between the dispersing blades 332 and close to the circular sleeve 331 will impact another dispersing blade 332 after being acted upon. If the accelerator is in a sticky or clumped state at this time, it will disperse under the impact force, or remain as a whole but the adhesion between them will decrease. With subsequent multiple impacts (multiple dispersing components are installed on the rotating shaft 32), the sticky or clumped accelerator will be dispersed. The accelerator located between the dispersing blades 332 and far from the circular sleeve 331 will move towards the arc-shaped baffle 34 under the action of centrifugal force after being acted upon. There are two situations in this method:

[0049] Scenario 1: When the accelerator directly impacts the surface of the arc-shaped baffle 34, accelerators that are bonded or combined into a single piece are easily separated under the impact force. If they do not separate, the adhesion between them is correspondingly reduced. After impacting the surface of the arc-shaped baffle 34, the accelerator will be subjected to the force of the arc-shaped baffle 34 and will move in the opposite direction, as shown in the attached diagram. Figure 7As shown, the accelerator returns to the space between the dispersing blades 332 and is subjected to the force of the dispersing blades 332. This process is repeated, and the accelerator that is bonded or combined into a whole block is dispersed. To further illustrate, generally speaking, the accelerator that has become a whole block after experiencing one impact can be dispersed.

[0050] Scenario 2: The accelerator, under the force of the dispersing blades 332, impacts the inner wall of the treatment tank 22 along the gap between the arc-shaped baffles 34. The accelerator impacting the inner wall of the treatment tank 22 will be subjected to a corresponding impact force, causing the entire piece of accelerator to disperse after being subjected to this impact force. If it is not dispersed, the adhesion between them should also be reduced accordingly. After impacting the inner wall of the treatment tank 22, the accelerator will be subjected to the reaction force of the inner wall of the treatment tank 22 and will move accordingly, as shown in the attached diagram. Figure 7 As shown, the accelerator moves into the arc-shaped baffle 34;

[0051] Furthermore, the present invention utilizes the dispersing element to act on the accelerator, causing the accelerator to be subjected to force and impact the inner wall of the processing tank 22, the arc-shaped baffle 34, and the dispersing blade 332 respectively. The impact force facilitates the dispersion of the accelerator that is bound together as a whole. Without dispersion, its adhesive force will be reduced. After multiple operations, most of the integral accelerator will be dispersed, and a small portion of the integral accelerator will be dispersed under the action of the detection and processing component 35.

[0052] A preliminary screening frame 4 is fixedly installed on the processing tank 22, and the preliminary screening frame 4 has a cavity 41 inside. Multiple filter holes 42 are provided inside the processing tank 22 to prevent the accelerator from sticking or agglomerating. The filter holes 42 are used to prevent the accelerator from forming solid pieces. When the accelerator enters the processing tank 22 from the inlet 23, it will come into contact with the filter holes 42 due to gravity. Qualified accelerator will fall into the cavity 41 along the filter holes 42, thus achieving a preliminary screening effect. The preliminary screening frame 4 is located away from the feed inlet. A vent 5 is installed at one end of the material tank 21. A discharge port 43 is installed near the material tank 21, and an output pipe 44 for connecting to the end cap 12 is connected to the discharge port 43. The end of the output pipe 44 penetrates the inner wall of the end cap 12 and extends into the interior of the reaction tank 11, so that the promoter falling into the cavity 41 is oriented under the action of the gas at the vent 5 until it is transported to the discharge port 43, and falls into the interior of the reaction tank 11 under the action of the output pipe 44, thereby playing the role of preliminary screening.

[0053] As a further limitation of this embodiment, the detection and processing component 35 includes a limiting frame 351 disposed at one end of the arc-shaped baffle 34, and multiple limiting frames 351 are fixedly installed on the inner wall of the processing tank 22, corresponding one-to-one with the arc-shaped baffle 34. The limiting frame 351 is provided with a Y-shaped groove 352, which is used to limit the movement state of the accelerator, as shown in the attached figure. Figure 9 As shown: The accelerator inside the arc-shaped baffle 34 moves in a directional manner along the inner wall of the arc-shaped baffle 34 under the action of gas. When it moves to the limiting frame 351, if the accelerator is placed horizontally (with a large width), its movement will be corrected by the action of the Y-shaped groove 352. Multiple connecting rods 353 are fixedly installed on the rotating shaft 32. A turntable 354 is installed at the end of the connecting rod 353. The turntable 354 is located on one side of the limiting frame 351. A separation frame 355 is installed on the side of the turntable 354 away from the limiting frame 351. Multiple separation frames 355 are fixedly installed on the inner wall of the processing tank 22, corresponding one-to-one with the arc-shaped baffle 34 and the limiting frame 351. The side walls of the frame 351, turntable 354, and separation frame 355 are all provided with multiple circular grooves 356, and the circular grooves 356 are in a connected state. Hole grooves 357 are provided on the circular grooves 356 on the separation frame 355. Cutting blades 358 are fixedly installed inside the circular grooves 356 on the turntable 354. The turntable 354 is provided with multiple strip grooves 359. To be further explained, the diameter of the circular grooves 356 is the size of three accelerators integrated into one unit (it can also be set according to the actual situation). The diameter of the hole grooves 357 is slightly larger than the size of the qualified accelerator (the size of the qualified accelerator). The height of the strip grooves 359 is slightly larger than the diameter of the hole grooves 357 but much smaller than the circular grooves 356.

[0054] Specifically, the monolithic accelerator (multiple accelerators combined into one accelerator) enters the limiting frame 351 along the inside of the arc-shaped baffle 34 under the action of gas. Its movement is controlled by the Y-shaped groove 352. The end of the monolithic accelerator moves towards the turntable 354 and the separating frame 355 via the circular groove 356 on the inner wall of the limiting frame 351. The turntable 354 rotates with the rotating shaft 32. When the circular groove 356 on the turntable 354 reaches the monolithic accelerator, it quickly enters the circular groove 356 on the turntable 354, and its front end also enters the circular groove 356 in the separating frame 355. At this point, the front end of the monolithic accelerator is in the circular groove 356 on the separating frame 355, and the rear end is on the turntable 354. In the circular groove 356, when in this state, the turntable 354 rotates with the rotating shaft 32 (the front end of the integral accelerator is in the circular groove 356 of the separation frame 355). The cutting blade 358 inside the circular groove 356 on the turntable 354 cuts the middle part of the integral accelerator, dispersing it. The dispersed accelerator will enter the separation frame 355 along the circular groove 356 on the turntable 354, and move to the feeding tank 21 through the hole groove 357 on the separation frame 355. To further explain, qualified accelerator will enter the separation frame 355 along the strip groove 359, and enter the feeding tank 21 along the hole groove 357 on the separation frame 355. Thus, under the action of the feeding tank 21, the accelerator enters the reactor body 1 to carry out the corresponding oxidation reaction.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rubber accelerator oxidation feeding device, characterized in that: The reactor includes a reactor body (1), which includes a reaction vessel (11), an end cap (12), and an air inlet (13). A feeding mechanism (2) is provided on the reactor body (1), and the feeding mechanism (2) includes a feeding tank (21), a processing tank (22), and a feed inlet (23). The feed inlet (23) is located on the processing tank (22), and the output end of the feeding tank (21) is connected to the feed end of the end cap (12). A dispersion component (3) is provided on the processing tank (22), and the dispersion component (3) is used to separate the accelerator that is in a sticky or agglomerated state. The dispersion component (3) includes a servo motor (31) disposed at the end of the processing tank (22), and the output end of the servo motor (31) penetrates through the outer wall of the processing tank (22) and extends into its interior. A rotating shaft (32) is disposed on the output end of the servo motor (31), and a plurality of dispersion rods (33) are disposed on the rotating shaft (32). The dispersion rods (33) are composed of a circular sleeve (331) and a plurality of dispersion blades (332). The dispersion blades (332) are distributed in a circular pattern at equal intervals on the circular sleeve (331). A plurality of arc-shaped baffles (34) are installed inside the processing tank (22), and a detection processing component (35) is disposed at one end of the arc-shaped baffles (34). The dispersing blade (332) is arranged in an arc shape on the circular sleeve (331); The processing tank (22) is equipped with a preliminary screening frame (4), and the preliminary screening frame (4) is provided with a cavity (41) inside. Multiple filter holes (42) are provided inside the processing tank (22) to prevent the adhesion or agglomeration of the promoter. The preliminary screening frame (4) is provided with a discharge port (43), and the discharge port (43) is provided with an output pipe (44) for connecting to the end cap (12). The end of the output pipe (44) penetrates the inner wall of the end cap (12) and extends into the interior of the reaction tank (11). The detection and processing component (35) includes a limiting frame (351) disposed at one end of the arc-shaped baffle (34), and multiple limiting frames (351) are disposed inside the processing tank (22) and correspond to the arc-shaped baffle (34). The limiting frame (351) is provided with a Y-shaped groove (352), and the Y-shaped groove (352) is used to limit the movement state of the accelerator. The rotating shaft (32) is provided with a plurality of connecting rods (353), wherein a turntable (354) is provided on the connecting rods (353), the turntable (354) is located on one side of the limiting frame (351), and a separation frame (355) is provided on the side of the turntable (354) away from the limiting frame (351). The sidewalls of the limiting frame (351), the turntable (354) and the separation frame (355) are all provided with a plurality of circular grooves (356), and the circular grooves (356) are in a connected state. Holes (357) are provided on the circular grooves (356) on the separation frame (355). Cutting blades (358) are provided inside the circular grooves (356) on the turntable (354). The turntable (354) is provided with a plurality of strip grooves (359).

2. The rubber accelerator oxidation feeding device according to claim 1, characterized in that: Both the preliminary screening frame (4) and the processing tank (22) are equipped with multiple vents (5).

3. The rubber accelerator oxidation feeding device according to claim 2, characterized in that: The height of the strip groove (359) is greater than the diameter of the hole groove (357), and the diameter of the circular groove (356) is greater than the height of the strip groove (359).

4. An oxidation process for rubber accelerators, characterized in that: The rubber accelerator oxidation process described in claim 3 is applied to a rubber accelerator oxidation feeding device, and includes the following oxidation process: S1. Raw material selection: Accelerator M, solvent, catalyst; S2. Add the promoter M into the reactor body (1), then add solvent to dissolve the promoter M, and add a small amount of catalyst; S3. Introduce oxygen into the reactor body (1) until the oxygen level no longer decreases; S4, cooling and suction filtration; S5. Recover the catalyst, reduce pressure, distill, and dry to obtain the oxidized promoter.

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