Preparation Device and Preparation Method of Isooctyl Mercaptoacetate

Abstract

The invention relates to a preparation device and method for isooctyl thioglycolate, and particularly to the technical field of chemical intermediate preparation. A synthesis tank and a stirring mechanism are provided, the stirring mechanism is placed in a synthesis space of the synthesis tank, raw materials for isooctyl thioglycolate to be synthesized are placed into the synthesis space of the synthesis tank according to a set molar ratio, a first driving member arranged outside the synthesis tank is connected to a portion of a first stirring member extending out of the synthesis space, and a free end of the first stirring member is connected to a second stirring member via a cross universal joint, a sliding member is slidably sleeved on the outer periphery of the first stirring member, and the sliding member is slidable along the first stirring member until it engages with the cross universal joint. The first driving member drives the first stirring member to rotate, thereby stirring different areas in the synthesis space and uniformly dispersing thioglycolic acid and isooctyl alcohol, thereby improving the manufacturing efficiency of isooctyl thioglycolate.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical intermediate preparation, in particular to a preparation device and a preparation method of isooctyl thioglycolate. Background Art

[0002] Isooctyl thioglycolate, an important chemical intermediate, is widely used in pharmaceuticals, pesticides, dyes, and other fields. With the rapid development of the chemical industry, the preparation process for isooctyl thioglycolate has undergone continuous improvement and optimization. From the initial simple reaction to today's sophisticated production, significant progress has been made in the control of reaction conditions, raw material purity requirements, and equipment improvements.

[0003] Currently, the preparation of isooctyl thioglycolate mainly adopts the method of esterification reaction between thioglycolate and isooctyl alcohol. In a typical preparation process, thioglycolate and isooctyl alcohol are mixed in a certain proportion and refluxed under the catalytic action of an acidic catalyst. During the reaction process, continuous stirring is required to promote sufficient contact of the reactants, and the reaction conditions are optimized by controlling the temperature and time. After the reaction is completed, the target product, isooctyl thioglycolate, is finally obtained through post-processing steps such as neutralization, extraction, and distillation.

[0004] In the prior art, when preparing isooctyl thioglycolate, thioglycolate and isooctyl alcohol are usually mixed under nitrogen and heated to 100-120°C before stirring and refluxing. However, during the stirring and mixing process, a single-shaft stirrer is usually used to stir the mixture clockwise or counterclockwise. Although this stirring method can achieve the mixing function of thioglycolate and isooctyl alcohol, the flow field formed during the mixing process is mostly a regular laminar flow field. The presence of a laminar flow field causes the mixing process of the mixed fluid formed by thioglycolate and isooctyl alcohol to rely mainly on molecular diffusion. Since molecular diffusion usually diffuses in the laminar flow field where the corresponding molecules are located, this causes the mixture to form a layered structure or incomplete mixing. The presence of this phenomenon will affect the efficiency of the esterification reaction and the yield of isooctyl thioglycolate. Summary of the Invention

[0005] The main purpose of the present invention is to provide a preparation device and a preparation method for isooctyl thioglycolate, aiming to solve the problem in the related art that, during the stirring and mixing process of thioglycolic acid and isooctyl alcohol, molecules in each layer of the flow field diffuse in the laminar flow field in which they are located, thereby causing the mixture to form a layered structure or incomplete mixing, which affects the esterification reaction efficiency and the yield of isooctyl thioglycolate.

[0006] To achieve the above object, the present invention provides a device for preparing isooctyl thioglycolate, comprising:

[0007] A synthesis tank, wherein a synthesis space for synthesizing the isooctyl thioglycolate is formed in the synthesis tank, and a feed port, a mounting hole, and a discharge port are formed on the synthesis tank, which are spaced apart and communicated with the synthesis space; and

[0008] A stirring mechanism is arranged in the synthesis space, and the stirring mechanism includes a first stirring member, a second stirring member and a sliding member. The two ends of the first stirring member are respectively a driving end and a rotating end. The driving end can be rotatably passed through the mounting hole and extended out of the synthesis space. The driving end is connected to the output shaft of the first driving member installed on the top of the synthesis tank. The rotating end is rotationally connected to the second stirring member through a cross universal joint. The sliding member can be slidably installed on the first stirring member, and the sliding member can slide along the first stirring member to engage or disengage with the cross universal joint, so as to make the first stirring member and the second stirring member rotate coaxially in the synthesis space or make the second stirring member and the first stirring member rotate with variable axes in the synthesis space, and synthesize the isooctyl thioglycolate.

[0009] In one embodiment, the first stirring member comprises:

[0010] a first driving shaft, wherein the first driving shaft has the driving end and the rotating end at its two ends respectively, a through hole being formed in the first driving shaft, and a waist-shaped hole being formed on the first driving shaft, the waist-shaped hole being connected to the through hole, and the waist-shaped hole extending from the driving end to the rotating end;

[0011] a first stirring assembly, the first stirring assembly being mounted on the outer periphery of the first driving shaft near the driving end; and

[0012] A drive assembly is installed in the through hole, and the free end of the drive assembly is arranged along the through hole toward the rotating end, at least a portion of the sliding component can be slidably extended into the waist-shaped hole and rotated with the output shaft of the drive assembly, and the drive assembly can drive the sliding component to slide along the first drive shaft until it engages or disengages with the cross universal joint.

[0013] In one embodiment, the drive assembly comprises:

[0014] a second driving member, the second driving member being installed in the through hole and disposed close to the driving end;

[0015] a telescopic rod, the telescopic rod being slidably received in the through hole and being mounted on an output end of the second driving member; and

[0016] A connecting block, the connecting block is connected to the telescopic rod, the connecting block slides with the inner wall of the through hole, the sliding component is connected to the connecting block, and the second driving member can drive the connecting block to slide through the telescopic rod, so that the sliding component slides along the first driving shaft until it engages or disengages with the cross universal joint.

[0017] In one embodiment, the first stirring assembly includes a second sleeve, the second sleeve is fixed to the outer periphery of the first driving shaft, and the outer periphery of the second sleeve is provided with a plurality of first stirring blades spaced apart along the circumferential direction.

[0018] In one embodiment, the sliding component includes:

[0019] a third sleeve, the third sleeve being slidably sleeved on the outer periphery of the first drive shaft, the third sleeve protruding inwardly corresponding to the inner wall of the waist-shaped hole until it is connected to the connecting block;

[0020] Two first connecting rods, the two first connecting rods are installed on the outer periphery of the third sleeve in an opposed and spaced relationship, and both of the first connecting rods extend along the extension direction of the first drive shaft in a direction away from the drive end;

[0021] Two U-shaped locking blocks, each of which is connected to one of the first connecting rods, and symmetrically arranged on the outer periphery of the first drive shaft, each of which is provided with a locking groove capable of engaging the cross universal joint; and

[0022] At least two limiting protrusions are provided, and at least two limiting protrusions are respectively arranged at the notch positions of the two locking grooves, and each limiting protrusion can limit the second stirring member from rotating out of the locking groove from the corresponding side.

[0023] In one embodiment, the outer periphery of the third sleeve is further provided with second stirring blades spaced apart along the circumferential direction.

[0024] In one embodiment, the second stirring member comprises:

[0025] a second drive shaft, one end of which is connected to the cross universal joint, and the other end of which extends away from the cross universal joint to form a stirring end; and

[0026] a first stirring ball, the first stirring ball being mounted on the stirring end, the stirring ball having a first accommodating cavity for accommodating an external catalyst, and a body of the first stirring ball having a plurality of first holes spaced apart and communicating with the first accommodating cavity;

[0027] The first driving member can drive the second driving shaft via the first driving shaft to drive the first stirring ball to stir the raw material solution for making the isooctyl thioglycolate in the synthesis space, and thus make the isooctyl thioglycolate.

[0028] In one embodiment, the first stirring ball is further provided with a plurality of mounting positions spaced apart along the circumference;

[0029] The second stirring member further comprises:

[0030] a plurality of second connecting rods, wherein the number of the second connecting rods matches the number of the mounting positions and the second connecting rods are connected one by one, and the lengths of all the second connecting rods are different; and;

[0031] a plurality of second stirring balls, each of which has a second accommodating cavity formed therein, and a plurality of second holes formed on the sphere of each second stirring ball, each of which is spaced apart and communicates with the second accommodating cavity. The number of the second stirring balls is the same as the number of the second connecting rods, and the second stirring balls are disposed in a one-to-one correspondence at an end of the second connecting rod away from the corresponding mounting position;

[0032] The first stirring balls can drive the corresponding second stirring balls to rotate in the synthesis space through all the second connecting rods and stir the raw materials to produce the isooctyl thioglycolate.

[0033] In one embodiment, the second stirring component further includes a fourth sleeve mounted on the second drive shaft, the fourth sleeve having an interference fit with the second drive shaft, and a plurality of third stirring blades spaced apart along the circumferential direction are provided on the fourth sleeve.

[0034] Based on the same technical concept, in a second aspect, the present invention further provides a method for preparing isooctyl thioglycolate, using the device for preparing isooctyl thioglycolate described in the first aspect;

[0035] The preparation process of the isooctyl thioglycolate comprises the following steps:

[0036] A three-port pipe is installed at the feed port; wherein the three-port pipe has a first inlet, a second inlet and a third inlet, and a cooling reflux device is installed on the first inlet;

[0037] introducing thioglycolic acid and isooctyl alcohol into the synthesis space from the feed port through the second inlet at a molar ratio of 1:1.1 to 1:1.3;

[0038] introducing an inert gas into the synthesis space through the third inlet and heating the synthesis space to a target temperature;

[0039] controlling the stirring mechanism to stir the synthesis space so that the thioglycolic acid and isooctyl alcohol undergo an esterification reaction under the action of the catalyst;

[0040] The isooctyl thioglycolate is prepared by cooling and refluxing through the cooling and reflux equipment.

[0041] The technical solution of the present invention is to set up a synthesis tank and a stirring mechanism. When in use, the stirring mechanism composed of a first stirring member, a second stirring member and a sliding member is placed in the synthesis space of the synthesis tank, and the driving end of the first stirring member is extended out of the synthesis space. At the same time, the raw materials of thioglycolic acid and isooctyl alcohol for synthesizing isooctyl thioglycolate are placed in the synthesis space of the synthesis tank according to a set molar ratio. Then, the first driving member arranged outside the synthesis tank is connected to the part of the first stirring member extending out of the synthesis space, and the free end of the first stirring member is connected to the second stirring member through a cross universal joint. At the same time, the sliding member is slidably mounted on the outer periphery of the first stirring member, and the sliding member can slide along the first stirring member until it is engaged with the cross universal joint. The first driving member is used to drive the first stirring member to drive the sliding member and the second stirring member to rotate, so that the present invention has the function of stirring the synthesis space, and can thereby enable thioglycolic acid and isooctyl alcohol to be mixed in the synthesis space and heated under the action of a catalyst to produce an esterification reaction. On this basis, the sliding component can slide along the first stirring component until it is disengaged from the cross universal joint, so that the second stirring component and the first stirring component can rotate in a variable axis manner within the synthesis space. As a result, the present invention can utilize the variable axis stirring function of the second stirring component to stir different areas within the synthesis space, thereby realizing the function of destroying the laminar flow field within the synthesis space, thereby making it possible to evenly disperse the thioglycolic acid and isooctyl alcohol, thereby improving the mixing effect of the thioglycolic acid and isooctyl alcohol, and ensuring the efficiency of the esterification reaction and the yield of isooctyl thioglycolate. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0043] Figure 1 A schematic structural diagram of a device for preparing isooctyl thioglycolate provided by the present invention;

[0044] Figure 2 for Figure 1 A schematic structural diagram of the stirring mechanism of the example;

[0045] Figure 3 for Figure 2 A schematic structural diagram of the internal structure of the stirring mechanism of the example;

[0046] Figure 4 for Figure 3 A schematic diagram of the structure of the enlarged portion A of the example;

[0047] Figure 5 for Figure 2 A schematic structural diagram of the first drive shaft and the second drive shaft in the example in the engaged state;

[0048] Figure 6 for Figure 5 Schematic diagram of the internal structure;

[0049] Figure 7 for Figure 5 Schematic diagram of the connection structure between the first drive shaft and the second drive shaft in the example;

[0050] Figure 8 for Figure 7 Schematic diagram of the internal structure;

[0051] Figure 9 for Figure 8 A schematic structural diagram of the first stirring ball and the second stirring ball shown in the example;

[0052] Figure 10 The present invention is a flowchart of the method for preparing isooctyl thioglycolate.

[0053] Description of Figure Numbers:

[0054] 100, synthesis tank; 120, feed port; 130, mounting hole; 140, discharge port; 200, stirring mechanism; 210, first stirring member; 220, second stirring member; 230, sliding member; 211, driving end; 212, rotating end; 240, first driving member; 250, cross universal joint; 213, first driving shaft; 214, through hole; 215, waist-shaped hole; 216, first stirring assembly; 217, driving assembly; 2171, second driving member; 2172, telescopic rod; 2173, connecting block; 2161, second sleeve; 2162, first A stirring blade; 231, a third shaft sleeve; 232, a first connecting rod; 233, a U-shaped locking block; 234, a limiting protrusion; 235, a second stirring blade; 221, a second drive shaft; 222, a first stirring ball; 223, a first accommodating chamber; 224, a first hole; 225, a second connecting rod; 226, a second stirring ball; 227, a second accommodating chamber; 228, a second hole; 229, a fourth shaft sleeve; 260, a third stirring blade; 280, a fastener; 281, a guide sleeve; 282, a return spring; 283, a locking ball; 284, a slot; 218, a protrusion.

[0055] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0057] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0058] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0059] The invention provides a preparation device and a preparation method of isooctyl thioglycolate.

[0060] See also Figures 1 to 10In one embodiment of the present invention, the preparation device of isooctyl thioglycolate includes a synthesis tank 100 and a stirring mechanism 200. A synthesis space for synthesizing isooctyl thioglycolate is formed in the synthesis tank 100. The synthesis tank 100 is formed with a feed port 120, a mounting hole 130 and a discharge port 140 that are spaced and connected to the synthesis space. The stirring mechanism 200 is arranged in the synthesis space. The stirring mechanism 200 includes a first stirring member 210, a second stirring member 220 and a sliding member 230. The two ends of the first stirring member 210 are respectively a driving end 211 and a rotating end 212. The driving end 211 can rotatably pass through the mounting hole 130 and extend out of the Synthesis space, the driving end 211 is connected to the output shaft of the first driving member 240 installed on the top of the synthesis tank 100, the rotating end 212 is rotatably connected to the second stirring member 220 through a cross universal joint 250, the sliding member 230 is slidably installed on the first stirring member 210, and the sliding member 230 can slide along the first stirring member 210 to engage or disengage with the cross universal joint 250, so as to make the first stirring member 210 and the second stirring member 220 rotate coaxially in the synthesis space or make the second stirring member 220 and the first stirring member 210 rotate with variable axes in the synthesis space, and synthesize the isooctyl thioglycolate.

[0061] Specifically, the first stirring member 210 has a driving end 211 and a rotating end 212 at either end. The driving end 211 rotatably passes through the mounting hole 130 and extends out of the synthesis chamber. The driving end 211 is axially connected to the output shaft of a first driving member 240 mounted on the top of the synthesis tank 100. The rotating end 212 is rotatably connected to the second stirring member 220 via a cross universal joint 250. A sliding member 230 is slidably mounted on the first stirring member 210 and can slide along the first stirring member 210 until it engages or disengages with the cross universal joint 250, thereby allowing the first stirring member 210 and the second stirring member 220 to rotate coaxially within the synthesis chamber or to rotate the second stirring member 220 and the first stirring member 210 in a variable axis manner within the synthesis chamber to synthesize isooctyl thioglycolate. The driving end 211 of the first stirring member 210 extends through the mounting hole 130 to the exterior of the synthesis tank 100 and is connected to the output shaft of the first driving member 240 to achieve power transmission. At the same time, the rotating end 212 of the first stirring member 210 is rotatably connected to the second stirring member 220 via the cross universal joint 250 , so that the first stirring member 210 and the second stirring member 220 can work in coordination.

[0062] To facilitate a better understanding of the present invention, in specific use, the sliding member 230 can slide on the first stirring member 210. When the sliding member 230 slides to engage with the cross universal joint 250, the first stirring member 210 and the second stirring member 220 will maintain coaxial rotation. At this time, the stirring mechanism 200 can stir the thioglycolic acid and isooctyl alcohol in the synthesis space and complete preliminary mixing. On this basis, the sliding member 230 is then slid to disengage from the cross universal joint 250. At this time, the rotation axis of the second stirring member 220 and the rotation axis of the first stirring member 210 are in a variable axis rotation state that is not located on the same axis. By changing the central axis of the rotation axis of the first stirring member 210 and the second stirring member 220, the present invention can be implemented in a specific manner. Without adding an additional drive mechanism, the variable axis rotation function of the second stirring member 220 can increase the flow and collision opportunities of the reactant molecules in different regions, promote the full contact and reaction of thioglycolic acid and isooctyl alcohol, and improve the synthesis efficiency and product quality of isooctyl thioglycolate.

[0063] It should be specifically and clearly stated that in this embodiment, the exemplary synthesis tank 100 can be a metal tank body with water bath heating or direct heating functions in the prior art, or it can be a high-temperature resistant tank body that has both heating functions and insulation functions. This embodiment only uses the application and does not improve or design the material of the synthesis tank 100 itself. Therefore, it will not be described in detail here. Of course, in this embodiment, the exemplary first driving member 240 is preferably a drive motor in the prior art that can drive the stirring mechanism 200 to rotate and perform stirring operations.

[0064] In this embodiment, by setting up the synthesis tank 100 and the stirring mechanism 200, when in use, the stirring mechanism 200 composed of the first stirring member 210, the second stirring member 220 and the sliding member 230 is placed in the synthesis space of the synthesis tank 100, and the driving end 211 of the first stirring member 210 is extended out of the synthesis space, and at the same time, the raw materials of thioglycolic acid and isooctyl alcohol for synthesizing isooctyl thioglycolate are placed in the synthesis space of the synthesis tank 100 according to the set molar ratio, and then the first driving member 240 arranged outside the synthesis tank 100 is connected to the part of the first stirring member 210 extending out of the synthesis space, and the driving end 211 of the first stirring member 210 is extended out of the synthesis space. The free end of a stirring component 210 is connected to the second stirring component 220 through a cross universal joint 250, and the sliding component 230 is slidably mounted on the outer periphery of the first stirring component 210, so that the sliding component 230 can slide along the first stirring component 210 until it is engaged with the cross universal joint 250. The first driving member 240 is used to drive the first stirring component 210 to drive the sliding component 230 and the second stirring component 220 to rotate, so that the present invention has the function of stirring the synthesis space, thereby enabling the thioglycolic acid and isooctyl alcohol to be mixed in the synthesis space and heated under the action of a catalyst to produce an esterification reaction. On this basis, the sliding component 230 can slide along the first stirring component 210 until it is disengaged from the cross universal joint 250, so that the second stirring component 220 and the first stirring component 210 can rotate in a variable axis manner in the synthesis space. As a result, the present invention can utilize the variable axis stirring function of the second stirring component 220 to stir different areas in the synthesis space, thereby realizing the function of destroying the laminar flow field in the synthesis space, and thus making the thioglycolic acid and isooctyl alcohol evenly dispersed, thereby improving the mixing effect of thioglycolic acid and isooctyl alcohol, and ensuring the esterification reaction efficiency and the yield of thioglycolic acid isooctyl ester.

[0065] Please continue reading Figures 5 to 8In one embodiment, the first stirring member 210 includes a first driving shaft 213, a first stirring assembly 216, and a driving assembly 217. The two ends of the first driving shaft 213 are the driving end 211 and the rotating end 212, respectively. A through hole 214 is formed in the first driving shaft 213, and a waist-shaped hole 215 is formed on the first driving shaft 213. The waist-shaped hole 215 is connected to the through hole 214, and the waist-shaped hole 215 extends from the driving end 211 to the rotating end 212. The first stirring assembly 217 16 is installed on the outer periphery of the first driving shaft 213 near the driving end 211, the driving component 217 is installed in the through hole 214, and the free end of the driving component 217 is set along the through hole 214 toward the rotating end 212, at least part of the sliding component 230 can be slidably extended into the waist-shaped hole 215 and rotated with the output shaft of the driving component 217, and the driving component 217 can drive the sliding component 230 to slide along the first driving shaft 213 until it is engaged with or disengaged from the cross universal joint 250.

[0066] Specifically, the first drive shaft 213 serves as the main structure, and provides installation and movement space for the drive assembly 217 and the sliding component 230 through the through hole 214 and the waist-shaped hole 215 formed inside the first drive shaft 213. The first stirring component 216 is installed on the periphery of the first drive shaft 213 and can directly participate in the stirring process to improve the stirring efficiency. The drive assembly 217 is installed in the through hole 214, and the free end of the drive assembly 217 is set toward the rotating end 212 of the first drive shaft 213. At the same time, the sliding component 230 is partially extended into the waist-shaped hole 215 and rotated with the output shaft of the drive assembly 217. By controlling the sliding of the sliding component 230 through the drive assembly 217, the engagement or disengagement state of the sliding component 230 and the cross universal joint 250 can be adjusted. When the sliding member 230 is engaged with the cross universal joint 250, the first stirring member 210 and the second stirring member 220 maintain coaxial rotation, which is suitable for the initial stirring stage; when the sliding member 230 is disengaged from the cross universal joint 250, the second stirring member 220 begins to rotate in a variable axis state with the first stirring member 210, effectively destroying the laminar flow field in the synthesis space.

[0067] In some specific embodiments, the driving assembly 217 includes a second driving member 2171, a telescopic rod 2172 and a connecting block 2173. The second driving member 2171 is installed in the through hole 214, and the second driving member 2171 is arranged close to the driving end 211. The telescopic rod 2172 can be slidably accommodated in the through hole 214, and the telescopic rod 2172 is installed at the output end of the second driving member 2171. The connecting block 2173 is connected to the telescopic rod 2172, and the connecting block 2173 slides with the inner wall of the through hole 214. The sliding component 230 is connected to the connecting block 2173. The second driving member 2171 can drive the connecting block 2173 to slide through the telescopic rod 2172, so that the sliding component 230 slides along the first driving shaft 213 to engage or disengage with the cross universal joint 250.

[0068] Specifically, the second driving member 2171, serving as a power source, is installed within the through hole 214 and disposed near the driving end 211. The telescopic rod 2172 is connected to the output end of the second driving member 2171 and can slide within the through hole 214 under the drive of the second driving member 2171. The connecting block 2173, through its connection with the telescopic rod 2172, can also slide within the through hole 214. The connecting block 2173 slidably engages with the inner wall of the through hole 214, allowing at least a portion of the sliding member 230 to pass through the waist-shaped hole 215 and connect to the connecting block 2173. Consequently, when the second driving member 2171 drives the connecting block 2173 to slide via the telescopic rod 2172, the connecting block 2173, under the restraining action of the waist-shaped hole 215, drives the sliding member 230 to slide along the first driving shaft 213, ultimately achieving the function of engaging or disengaging with the cross universal joint 250.

[0069] It should be further clarified that the second driving member 2171 illustrated in this embodiment is preferably a cylinder or a servo motor, which is only used in this embodiment and has not been improved or designed, so it will not be described here one by one.

[0070] Please continue reading Figure 3 In one embodiment, the first stirring assembly 216 includes a second sleeve 2161, which is fixed to the outer periphery of the first driving shaft 213, and the outer periphery of the second sleeve 2161 is provided with a plurality of first stirring blades 2162 distributed at intervals along the circumferential direction.

[0071] Specifically, the second sleeve 2161 is fixedly mounted on the outer periphery of the first drive shaft 213 and rotates synchronously with the first drive shaft 213 during stirring. A plurality of circumferentially spaced first stirring blades 2162 are disposed on the outer periphery of the second sleeve 2161. By providing a plurality of circumferentially spaced first stirring blades 2162 on the second sleeve 2161, the present invention can fully utilize the circumferential space during use, forming multiple stirring action points and improving stirring efficiency.

[0072] Of course, in order to better implement the present invention, in a specific implementation process, when the axis switching is required, the movement of the first driving member 240 can be stopped first. When the first driving shaft 213 stops moving, the second driving member 2171 is activated, and the second driving member 2171 drives the telescopic rod 2172 to move, thereby driving the sliding member 230 to slide and disengage from the cross universal joint 250, ultimately achieving an axis switching motion mode in which the first driving shaft 213 and the second driving shaft 221 are not located on the same axis. After the axis switching stirring is completed or the esterification reaction of the current batch of isooctyl thioglycolate is completed, the second driving member 2171 can be used to drive the telescopic rod 2172 to slide the sliding member 230 to engage with the cross universal joint 250 when the first driving member 240 stops moving and the first driving shaft 213 stops rotating.

[0073] It can be further clarified that the second shaft sleeve 2161 serves as an installation carrier of the first stirring blade 2162, which not only simplifies the installation process of the first stirring blade 2162, but also enhances the structural stability.

[0074] Please continue reading Figure 3 、 Figure 4 In one embodiment, the sliding component 230 includes a third sleeve 231, two first connecting rods 232, two U-shaped locking blocks 233 and at least two limiting protrusions 234. The third sleeve 231 is slidably sleeved on the outer periphery of the first drive shaft 213. The third sleeve 231 protrudes inwardly 218 corresponding to the inner wall of the waist-shaped hole 215 until it is connected to the connecting block 2173. The two first connecting rods 232 are installed on the outer periphery of the third sleeve 231 opposite to each other and at intervals, and the two first connecting rods 232 are both along the first drive shaft 213. 13 extends in the direction away from the driving end 211, the two U-shaped locking blocks 233 are respectively connected to the first connecting rod 232, and the two U-shaped locking blocks 233 are symmetrically arranged on the outer periphery of the first driving shaft 213, and the two U-shaped locking blocks 233 are both provided with a locking groove that can engage the cross universal joint 250, at least two of the limiting protrusions 234 are respectively provided at the notch positions of the two locking grooves, and each of the limiting protrusions 234 can limit the second stirring component 220 from rotating out of the locking groove from the locking groove on the corresponding side.

[0075] Specifically, two first connecting rods 232 are mounted on the outer circumference of the third sleeve 231 in an opposed and spaced relationship. The two connecting rods extend along the extension direction of the first drive shaft 213, away from the drive end 211. The spaced arrangement of the first connecting rods 232 helps to create a uniform force distribution in space. The extension direction of the first connecting rods 232 is parallel to the first drive shaft 213, ensuring that the movement path of the sliding member 230 is smooth and does not deviate during the sliding process.

[0076] Two U-shaped locking blocks 233 are respectively connected to a first connecting rod 232, and the two U-shaped locking blocks 233 are symmetrically arranged on the outer periphery of the first drive shaft 213. Each U-shaped locking block 233 is provided with a locking groove that can engage the cross universal joint 250. The locking groove is an important component of the U-shaped locking block 233. When the sliding member 230 moves axially along the first drive shaft 213 away from the driving end 211, the locking groove can engage the cross universal joint 250, thereby achieving a connection between the first stirring member 210 and the second stirring member 220. The locking groove confines the cross universal joint 250 to a stable motion trajectory, thereby ensuring the coaxial stirring function.

[0077] At least two limiting protrusions 234 are provided at the notches of the two locking grooves. Each limiting protrusion 234 can prevent the second stirring member 220 from rotating out of the corresponding locking groove. The limiting protrusions 234 function to provide additional constraints on the engagement state, preventing the second stirring member 220 from loosening or disengaging from the locking groove under high rotation speeds or strong stirring forces, thereby improving the stability of the overall structure.

[0078] When variable-axis stirring is required, the second driving member 2171 can be controlled to operate in the reverse direction, causing the connecting block 2173 to drive the third sleeve 231 to slide toward the driving end 211. The sliding member 230 then moves, disengaging the locking groove from the cross universal joint 250. After the engagement is released, the second stirring member 220 begins to form a variable-axis rotation operation mode with the first stirring member 210, thereby enabling the present invention to effectively disrupt the laminar flow field and improve the mixing uniformity of the reactants.

[0079] Of course, in some improved embodiments, in order to further enhance the stability of the stirring mechanism 200 during the stirring process, an exemplary through hole 214 is provided along the extension direction of the first drive shaft 213 and simultaneously extends through the connection portion of the cross universal joint 250 connected to the rotating end 212. A fastening member 280 is further provided on the inner side of the end of the cross universal joint 250 connected to the rotating end 212. The exemplary fastening member 280 includes two guide sleeves 281. The two guide sleeves 281 are opposed to each other and are provided on both sides of the through hole 214 at the rotating end 212. The central axis of the guide sleeve 281 is perpendicular to the central axis of the through hole 214. A return spring 282 is provided in each guide sleeve 281, and a snap ball 283 is provided at the open end of each guide sleeve 281. The snap ball 283 can slide along the inner wall of the guide sleeve 281.

[0080] During specific use, the third sleeve 231 of the example is formed with a slot 284 at one end facing the rotating end 212, into which the two engaging balls 283 can slide and engage. When the second driving member 2171 drives the telescopic rod 2172 to slide, and the third sleeve 231 drives the sliding component 230 to slide and engage with the cross universal joint 250, the third sleeve 231, under linear motion along the telescopic rod 2172, moves its slot 284 near the rotating end 212 until it engages with the engaging balls 283, thereby limiting the separation of the sliding component 230 from the cross universal joint 250 and improving the stability of the stirring mechanism 200 during coaxial rotation.

[0081] Please continue reading Figure 3 In one embodiment, the outer periphery of the third sleeve 231 is further provided with second stirring blades 235 spaced apart along the circumferential direction.

[0082] Specifically, the third sleeve 231 serves as the main structure of the sliding member 230. When a U-shaped locking block 233, connected to the third sleeve 231 via two first connecting rods 232, engages with the cross universal joint 250, the second stirring blades 235 disposed on the outer periphery of the third sleeve 231 rotate with the first drive shaft 213, thereby providing additional stirring for the reactants within the synthesis space. The second stirring blades 235 are spaced apart circumferentially along the third sleeve 231, creating uniform stirring points and enhancing the stirring effect.

[0083] It can be further clarified that, in this embodiment, the third sleeve 231 sliding along the outer periphery of the first drive shaft 213 and the third sleeve 231 following the sliding should be understood as two working modes with a front-to-back timing difference in working conditions. It can be further understood that when it is necessary to make the third sleeve 231 slide along the first drive shaft 213, the second drive member 2171 installed in the first drive shaft 213 can be used to drive the telescopic rod 2172 to drive the third sleeve 231 to slide along the first drive shaft 213 through the connecting block 2173, so that the U-shaped locking block 233 can be engaged with or disengaged from the cross universal joint 250, thereby enabling the first drive shaft 213 and the second stirring member 220 to perform coaxial rotation or variable axis rotation. After the switching between the coaxial rotation or the variable axis rotation between the first drive shaft 213 and the second stirring component 220 is completed, since the third sleeve 231 protrudes inward 218 corresponding to the position of the waist-shaped hole on the first drive shaft 213 to connect with the connecting block 2173, a limit can be formed between the third sleeve 231 and the first drive shaft 213 in the circumferential direction of the first drive shaft 213, and the third sleeve 231 can rotate with the first drive shaft 213 to realize the stirring function.

[0084] Please continue reading Figures 5 to 9 In one embodiment, the second stirring component 220 includes a second driving shaft 221 and a first stirring ball 222, one end of the second driving shaft 221 is connected to the cross universal joint 250, and the other end of the second driving shaft 221 extends in a direction away from the cross universal joint 250 to form a stirring end, the first stirring ball 222 is installed at the stirring end, a first accommodating cavity 223 for accommodating an external catalyst is formed in the stirring ball, and a plurality of first holes 224 are formed on the sphere of each first stirring ball 222, which are distributed at intervals and connected to the first accommodating cavity 223; the first driving member 240 can drive the second driving shaft 221 through the first driving shaft 213 to drive the first stirring ball 222 to stir the raw material solution for preparing the isooctyl thioglycolate in the synthesis space, and prepare the isooctyl thioglycolate.

[0085] Specifically, the second drive shaft 221 serves as the main structure of the second stirring component 220, one end of which is connected to the cross universal joint 250, and the other end extends to form a stirring end and is installed with a first stirring ball 222, so that the second drive shaft 221 can receive power from the first drive shaft 213 through the cross universal joint 250 and transmit it to the first stirring ball 222 at the stirring end.

[0086] In order to better implement the present invention, in a specific implementation, the catalyst can be placed in the first accommodating chamber 223. By placing the catalyst in the first accommodating chamber 223, when stirring in the synthesis space, the second drive shaft 221 can be used to drive the first stirring ball 222 to move in the synthesis space, and the catalyst in the first stirring ball 222 is directly in contact with the thioglycolic acid and isooctyl alcohol in the synthesis space, so that the thioglycolic acid and isooctyl alcohol can undergo an esterification reaction to form thioglycolic acid isooctyl ester. At the same time, during the stirring process, because the first stirring ball 222 can drive the catalyst to continuously change its position in the synthesis space, the present invention can be ensured to be in direct contact with the thioglycolic acid and isooctyl alcohol at different positions during specific implementation. While the thioglycolic acid and isooctyl alcohol are mixed, the esterification reaction can be directly carried out, while ensuring the mixing effect, the catalytic efficiency is also improved.

[0087] Of course, in this embodiment, it can be further clarified that, in this embodiment, when the U-shaped locking block 233 of the sliding component 230 is engaged with the cross universal joint 250, the second drive shaft 221 and the first drive shaft 213 maintain coaxial rotation, and the first stirring ball 222 rotates along a fixed trajectory to perform conventional stirring on the reactants in the synthesis space.

[0088] When the U-shaped locking block 233 of the sliding member 230 is disengaged from the cross universal joint 250, the second drive shaft 221 and the first drive shaft 213 rotate in a variable-axis manner, and the motion trajectory of the first stirring ball 222 becomes complex, creating a three-dimensional stirring effect. Because the second drive shaft 221 and the first drive shaft 213 are in a variable-axis stirring state, the first stirring ball 222 not only stirs the reactants but also effectively disrupts the laminar flow field within the synthesis space, ensuring more complete contact between the reactants and the catalyst, further improving reaction efficiency.

[0089] Please continue reading Figure 9In one embodiment, the first stirring ball 222 is further provided with a plurality of mounting positions spaced apart along the circumferential direction; the second stirring component 220 further includes a plurality of second connecting rods 225 and a plurality of second stirring balls 226, the number of the second connecting rods 225 being the same as the number of the mounting positions and being connected one-to-one, and the lengths of all the second connecting rods 225 being different, a second accommodating cavity 227 being formed in each of the second stirring balls 226, a plurality of second holes 228 being spaced apart and communicating with the second accommodating cavity 227 being formed on the sphere of each of the second stirring balls 226, the number of the second stirring balls 226 being the same as the number of the second connecting rods 225 and being correspondingly arranged one-to-one at the end of the second connecting rod 225 away from the corresponding mounting position; the first stirring ball 222 can drive the corresponding second stirring ball 226 to rotate in the synthesis space through all the second connecting rods 225 and stir the raw materials to produce the isooctyl thioglycolate.

[0090] Specifically, a plurality of circumferentially spaced mounting locations provided on the first stirring ball 222 provide a connection base for the second connecting rod 225. The mounting locations are evenly distributed on the surface of the first stirring ball 222, ensuring a stable connection and balanced distribution of the second connecting rod 225.

[0091] On this basis, ensuring that the number of second connecting rods 225 matches the number of mounting positions and that they are connected one-to-one ensures that each mounting position has a corresponding second connecting rod 225, resulting in more balanced force transmission. Of particular note, all second connecting rods 225 are of varying lengths. This unequal length design allows the second stirring balls 226 to be distributed at different radial positions, creating a three-dimensional spatial distribution. This allows reactants to be stirred in different areas within the synthesis space, avoiding the "dead zone" problem associated with traditional stirring methods and enhancing the disruption of the laminar flow field.

[0092] Each second stirring ball 226 is formed with a second accommodating cavity 227 for accommodating a catalyst. Similar to the first stirring ball 222, each second stirring ball 226 is also formed with a plurality of second holes 228 spaced apart and connected to the second accommodating cavity 227. The provision of the second holes 228 allows the reactants to fully contact the catalyst within the second accommodating cavity 227 and also facilitates the diffusion of the reaction products. The number of second stirring balls 226 matches the number of second connecting rods 225, and they are arranged in a one-to-one correspondence at the end of the second connecting rod 225 away from the corresponding mounting position, thereby ensuring that each second connecting rod 225 has a corresponding second stirring ball 226, forming a complete stirring system.

[0093] In coaxial stirring mode, first stirring ball 222 and each second stirring ball 226 rotate along a fixed trajectory, forming a regular stirring field. The catalyst in first stirring ball 222 and all second stirring balls 226 then contact the reactants through the holes in the balls, promoting the esterification reaction between thioglycolic acid and isooctyl alcohol. The synergistic effect of the multiple stirring balls ensures sufficient contact between the reactants and the catalyst, improving reaction efficiency.

[0094] In the variable-axis stirring mode, the motion trajectory of the first stirring ball 222 becomes complex, driving each second stirring ball 226 to form an even more complex three-dimensional motion trajectory. This complex motion pattern effectively disrupts the laminar flow field within the synthesis space, ensuring more complete contact between reactants and catalysts, further improving reaction efficiency. In particular, due to the varying lengths of the second connecting rods 225, the second stirring balls 226 are more widely distributed within the space, covering a wider area within the synthesis space and achieving a more uniform stirring effect.

[0095] In one embodiment, the second stirring member 220 further includes a fourth sleeve 229 mounted on the second drive shaft 221 . The fourth sleeve 229 is interference fit with the second drive shaft 221 . The fourth sleeve 229 is provided with a plurality of third stirring blades 260 spaced apart along the circumferential direction.

[0096] Specifically, the fourth sleeve 229 is installed on the second drive shaft 221 and is tightly connected to the second drive shaft 221 through interference fit to ensure that there is no relative sliding between the fourth sleeve 229 and the second drive shaft 221, and it can accurately follow the rotational movement of the second drive shaft 221.

[0097] The fourth shaft sleeve 229 is provided with a plurality of third stirring blades 260 spaced apart along the circumferential direction. The third stirring blades 260 are evenly distributed on the periphery of the fourth shaft sleeve 229, forming an additional stirring structure. When the second drive shaft 221 rotates, the fourth shaft sleeve 229 rotates therewith, driving the third stirring blades 260 to form a rotating stirring effect in the synthesis space. The third stirring blades 260 can perform additional stirring on the reactants in the synthesis space, thereby enhancing the stirring effect of the entire stirring system.

[0098] It should be noted that the shape, size and distribution of the third stirring blade 260 can be adjusted according to actual needs. For example, stirring blades of different shapes such as straight blades, curved blades or spiral blades can be used to adapt to different stirring needs. At the same time, the number of the third stirring blades 260 can also be adjusted as needed, typically 3-8, evenly distributed on the periphery of the fourth shaft sleeve 229. These stirring blades can have the same or different shapes and sizes to form a more complex stirring effect.

[0099] Based on the same technical concept, please continue to refer to the second aspect. Figure 10 The present invention also provides a method for preparing isooctyl thioglycolate, using the device for preparing isooctyl thioglycolate described in the first aspect;

[0100] The preparation process of the isooctyl thioglycolate comprises the following steps:

[0101] S100, installing a three-port pipe at the feed port.

[0102] Specifically, the three-port pipe has a first inlet, a second inlet and a third inlet, and a cooling reflux device is installed on the first inlet.

[0103] In this step, first it is necessary to install a three-mouth pipe at the feed opening 120 position of the preparation device. The three-mouth pipe has a first import, a second import and a third import, wherein a cooling reflux device is installed on the first import. The installation of the three-mouth pipe needs to ensure to be connected with the feed opening 120 sealing to prevent harmful gas leakage during the reaction. The cooling reflux device generally includes a condenser and a circulating water device, and the condenser is provided with a spiral cooling tube inside, and circulating water flows in the cooling tube, and the isooctyl thioglycolate steam produced during the reaction can be condensed and refluxed into the synthesis tank 100.

[0104] The cooling reflux equipment should be installed at an appropriate height. It is generally recommended that the bottom of the condenser be approximately 15-20 cm above the reaction liquid surface to ensure good reflux. The cooling water inlet should be located at the bottom of the condenser, and the outlet at the top, creating countercurrent cooling and improving cooling efficiency. The cooling water flow rate should be controlled at 2-3 liters / minute, and the temperature should be kept within the range of 10-15°C.

[0105] The three-port tube should be made of corrosion-resistant borosilicate glass or polytetrafluoroethylene to resist the corrosive effects of thioglycolic acid. Each joint of the three-port tube should be equipped with standard ground-joint fittings to ensure a tight connection. The first inlet is used to connect to the cooling and reflux equipment, the second inlet is used to add reactants, and the third inlet is used to introduce inert gas and install monitoring equipment such as thermometers.

[0106] S200, introducing thioglycolic acid and isooctyl alcohol into the synthesis space from the feed port through the second inlet according to a molar ratio of 1:1.1 to 1:1.3.

[0107] In this step, the reactants need to be added to the synthesis space through the second inlet of the three-port pipe. Specifically, first, mercaptoacetic acid and isooctyl alcohol are accurately weighed and proportioned according to a molar ratio of 1:1.1 to 1:1.3. The selection of the ratio range exemplified in this embodiment is based on the following considerations: if the isooctyl alcohol ratio is too low, the esterification reaction is incomplete, resulting in residual mercaptoacetic acid; if the isooctyl alcohol ratio is too high, although it is conducive to the reaction equilibrium moving towards the product direction, it will increase the difficulty and cost of subsequent separation and purification.

[0108] S300 , introducing an inert gas into the synthesis space through the third inlet and heating the synthesis space to a target temperature.

[0109] This step aims to create the ideal environmental conditions for the reaction. First, introduce an inert gas (typically nitrogen or argon) into the synthesis chamber through the third inlet of the three-port tube to remove oxygen from the system and prevent oxidation of the thioglycolic acid. The inert gas flow rate should be controlled at 50-100 ml / min for at least 15 minutes to ensure complete replacement of oxygen in the system.

[0110] After the inert gas is introduced, the synthesis space is heated to the target temperature. Heating can be performed using an oil bath or electric heating mantle, with a temperature control accuracy of ±1°C. It should be noted that the target temperature in this embodiment is preferably 100°C-120°C.

[0111] S400, controlling the stirring mechanism to stir the synthesis space so that the thioglycolic acid and isooctyl alcohol undergo an esterification reaction under the action of a catalyst.

[0112] Specifically, the sufficient mixing and efficient reaction of thioglycolic acid and isooctyl alcohol can be achieved by controlling the working mode of the stirring mechanism 200. According to the characteristics of the aforementioned device, stirring can be divided into two modes: coaxial stirring mode and variable axis stirring mode.

[0113] S500, cooling and refluxing through the cooling and reflux equipment to produce the isooctyl thioglycolate.

[0114] Specifically, the cooling reflux equipment mainly includes a condenser and a circulating water system. Its function is to condense the substances evaporated during the reaction and reflux them to the reaction system to prevent material loss. At the same time, it helps to take away the reaction heat and control the reaction temperature.

[0115] The cooling water temperature should be controlled at 10-15°C, with a flow rate of 2-3 liters / minute. The cooling efficiency of the condenser directly affects the reaction process. Ensure that the condenser is functioning properly and there are no cooling water leaks. Observe the condenser reflux throughout the reaction; under normal circumstances, uniform droplet reflux should be observed.

[0116] After the reaction is complete, stop heating and stirring, but continue to introduce inert gas and maintain cooling water circulation to allow the reaction system to cool naturally to room temperature. The cooling process takes about 1-2 hours, and the cooling rate should not be too fast to avoid affecting product quality.

[0117] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A device for preparing isooctyl thioglycolate, characterized in that: include: A synthesis tank, wherein a synthesis space for synthesizing the isooctyl thioglycolate is formed in the synthesis tank, and a feed port, a mounting hole, and a discharge port are formed on the synthesis tank, which are spaced apart and communicated with the synthesis space; and A stirring mechanism is arranged in the synthesis space, and the stirring mechanism includes a first stirring member, a second stirring member and a sliding member. The two ends of the first stirring member are respectively a driving end and a rotating end. The driving end can be rotatably passed through the mounting hole and extended out of the synthesis space. The driving end is connected to the output shaft of the first driving member installed on the top of the synthesis tank. The rotating end is rotationally connected to the second stirring member through a cross universal joint. The sliding member can be slidably installed on the first stirring member, and the sliding member can slide along the first stirring member to engage or disengage with the cross universal joint, so as to make the first stirring member and the second stirring member rotate coaxially in the synthesis space or make the second stirring member and the first stirring member rotate with variable axes in the synthesis space, and synthesize the isooctyl thioglycolate.

2. The preparation device of isooctyl thioglycolate according to claim 1, wherein The first stirring member comprises: a first driving shaft, wherein the first driving shaft has the driving end and the rotating end at its two ends respectively, a through hole being formed in the first driving shaft, and a waist-shaped hole being formed on the first driving shaft, the waist-shaped hole being connected to the through hole, and the waist-shaped hole extending from the driving end to the rotating end; a first stirring assembly, the first stirring assembly being mounted on the outer periphery of the first driving shaft near the driving end; and A drive assembly is installed in the through hole, and the free end of the drive assembly is arranged along the through hole toward the rotating end, at least a portion of the sliding component can be slidably extended into the waist-shaped hole and rotated with the output shaft of the drive assembly, and the drive assembly can drive the sliding component to slide along the first drive shaft until it engages or disengages with the cross universal joint.

3. The preparation device of isooctyl thioglycolate according to claim 2, wherein The drive assembly includes: a second driving member, the second driving member being installed in the through hole and being disposed close to the driving end; a telescopic rod, the telescopic rod being slidably received in the through hole and being mounted on an output end of the second driving member; and A connecting block, the connecting block is connected to the telescopic rod, the connecting block slides with the inner wall of the through hole, the sliding component is connected to the connecting block, and the second driving member can drive the connecting block to slide through the telescopic rod, so that the sliding component slides along the first driving shaft until it engages or disengages with the cross universal joint.

4. The preparation device of isooctyl thioglycolate according to claim 3, wherein The first stirring assembly includes a second shaft sleeve, which is fixed to the outer periphery of the first driving shaft. The outer periphery of the second shaft sleeve is provided with a plurality of first stirring blades spaced apart along the circumferential direction.

5. The preparation device of isooctyl thioglycolate according to claim 3, wherein The sliding component includes: a third sleeve, the third sleeve being slidably sleeved on the outer periphery of the first drive shaft, the third sleeve protruding inwardly corresponding to the inner wall of the waist-shaped hole until it is connected to the connecting block; Two first connecting rods, the two first connecting rods are installed on the outer periphery of the third sleeve in an opposed and spaced relationship, and both of the first connecting rods extend along the extension direction of the first drive shaft in a direction away from the drive end; Two U-shaped locking blocks, each of which is connected to one of the first connecting rods, and symmetrically arranged on the outer periphery of the first drive shaft, each of which is provided with a locking groove capable of engaging the cross universal joint; and At least two limiting protrusions are provided, and at least two limiting protrusions are respectively arranged at the notch positions of the two locking grooves, and each limiting protrusion can limit the second stirring member from rotating out of the locking groove from the corresponding side.

6. The device for preparing isooctyl thioglycolate according to claim 5, wherein The outer periphery of the third sleeve is further provided with second stirring blades spaced apart along the circumferential direction.

7. The device for preparing isooctyl thioglycolate according to claim 6, wherein The second stirring member comprises: a second drive shaft, one end of which is connected to the cross universal joint, and the other end of which extends away from the cross universal joint to form a stirring end; and a first stirring ball, the first stirring ball being mounted on the stirring end, the first stirring ball having a first accommodating cavity for accommodating an external catalyst, and a body of the first stirring ball having a plurality of first holes spaced apart and communicating with the first accommodating cavity; The first driving member can drive the second driving shaft via the first driving shaft to drive the first stirring ball to stir the raw material solution for making the isooctyl thioglycolate in the synthesis space, and thus make the isooctyl thioglycolate.

8. The device for preparing isooctyl thioglycolate according to claim 7, wherein The first stirring ball is also provided with a plurality of mounting positions spaced apart along the circumference; The second stirring member further comprises: a plurality of second connecting rods, wherein the number of the second connecting rods matches the number of the mounting positions and the second connecting rods are connected one by one, and the lengths of all the second connecting rods are different; and; a plurality of second stirring balls, each of which has a second accommodating cavity formed therein, and a plurality of second holes formed on the sphere of each second stirring ball, each of which is spaced apart and communicates with the second accommodating cavity. The number of the second stirring balls is the same as the number of the second connecting rods, and the second stirring balls are disposed in a one-to-one correspondence at an end of the second connecting rod away from the corresponding mounting position; The first stirring balls can drive the corresponding second stirring balls to rotate in the synthesis space through all the second connecting rods and stir the raw materials to produce the isooctyl thioglycolate.

9. The device for preparing isooctyl thioglycolate according to claim 8, wherein The second stirring component further includes a fourth sleeve mounted on the second drive shaft. The fourth sleeve is interference fit with the second drive shaft. The fourth sleeve is provided with a plurality of third stirring blades spaced apart along the circumferential direction.

10. A method for preparing isooctyl thioglycolate, characterized in that: Using the preparation device of isooctyl thioglycolate according to any one of claims 1 to 9; The preparation process of the isooctyl thioglycolate comprises the following steps: A three-port pipe is installed at the feed port; wherein the three-port pipe has a first inlet, a second inlet and a third inlet, and a cooling reflux device is installed on the first inlet; introducing thioglycolic acid and isooctyl alcohol into the synthesis space from the feed port through the second inlet at a molar ratio of 1:1.1 to 1:1.3; introducing an inert gas into the synthesis space through the third inlet and heating the synthesis space to a target temperature; controlling the stirring mechanism to stir the synthesis space so that the thioglycolic acid and isooctyl alcohol undergo an esterification reaction under the action of the catalyst; The isooctyl thioglycolate is prepared by cooling and refluxing through the cooling and reflux equipment.

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