A tritriacetin integrated synthesis reaction device and synthesis method

Abstract

The application relates to the technical field of organic chemical synthesis, in particular to a triacetin integrated synthesis reaction device and a synthesis method, which comprise an aluminum profile frame and a reaction catalysis mechanism fixedly arranged in the aluminum profile frame, and the reaction catalysis mechanism is used for triacetin integrated synthesis reaction, wherein the reaction catalysis mechanism comprises a reaction kettle fixedly arranged in the aluminum profile frame. The buoyancy of a floating ball with the material liquid level in the reaction kettle is utilized to automatically drive a pushing piston to move, the corresponding volume of concentrated sulfuric acid catalyst can be accurately pushed into a reaction system according to the actual input volume of glycerol and acetic acid raw materials, the catalyst addition amount is automatically matched, manual adjustment and control of an operator are not needed, and problems such as slow reaction rate, low conversion rate, increased side reaction, equipment corrosion and the like caused by improper catalyst addition amount can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of organic chemical synthesis technology, specifically to an integrated synthesis reactor and method for triacetin. Background Technology

[0002] Triacetin (also known as triacetin) is a non-toxic, odorless, and easily degradable fine chemical product. With its excellent plasticizing, compatibility, and stability properties, it is widely used in tobacco filter bonding, food flavoring fixation, cosmetic solvents, pharmaceutical coating, and plastic modification. Market demand remains stable and the requirements for product purity and production efficiency are increasing.

[0003] The mainstream industrial synthesis route involves the esterification of glycerol and acetic acid in the presence of an acidic catalyst (such as concentrated sulfuric acid or ionic liquids) to produce triacetin and water. This reaction is a reversible equilibrium reaction, and it requires efficient catalyst activation, uniform mixing of materials, and timely removal of reaction water to promote the forward reaction and improve conversion rate and product purity.

[0004] The "Anti-Accumulation Esterification Reaction Device for Triacetin" disclosed in cited document "202520223579.1" is equipped with a movable structure to facilitate the quantitative addition of catalyst. A movable magnet 1, through a magnet 2, drives a pressure sensor to move, so that the pressure sensor moves to the mark for adding catalyst. The catalyst is poured into the feed tank, causing the float to move upward as the catalyst liquid level rises. The end of the float presses against the pressure sensor, and the pressure sensor opens the electromagnetic control valve through the control device to inject catalyst into the reaction tank.

[0005] However, this device still has significant technical shortcomings: the catalyst addition relies solely on manual adjustment, making it impossible to precisely match and quantitatively add catalyst based on the actual amount and molar ratio of glycerol and acetic acid feedstocks in real time. In actual production, the amount of catalyst added depends entirely on the operator's experience, making it impossible to achieve adaptive quantitative addition based on the feedstock amount. When the catalyst is added too little, the esterification reaction rate is slow, the reaction equilibrium is difficult to shift forward, and the feedstock conversion rate is low; when the catalyst is added too much, it not only exacerbates the side reactions and generates impurities but also corrodes the reaction equipment, significantly increasing the load on subsequent product separation and purification, and raising production costs. In view of this, we propose an integrated triacetylglycerol synthesis reaction device and synthesis method to solve the above-mentioned technical problems. Summary of the Invention

[0006] To address the shortcomings of existing technologies, such as the inability of catalyst addition to adaptively match the amount of raw materials, reliance on electrical components leading to corrosion and failure, and the complexity of equipment due to the separation of stirring and dosing functions, this invention provides an integrated triacetin synthesis reaction device and method, aiming to achieve adaptive quantitative catalyst addition, purely mechanical control without electrical components, and integrated stirring-dosing linkage.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an integrated triacetin synthesis reaction apparatus, comprising an aluminum profile frame and a reaction catalytic mechanism fixedly disposed inside the aluminum profile frame. The reaction catalytic mechanism is used for the integrated synthesis reaction of triacetin. The reaction catalytic mechanism includes a reaction vessel fixedly disposed inside the aluminum profile frame. A rotating disk is rotatably disposed on the top of the reaction vessel. A catalyst storage cylinder is vertically fixed inside the rotating disk. A pusher piston is slidably disposed inside the catalyst storage cylinder. A collection bottle is fixedly disposed on the top of the rotating disk. A discharge channel is formed through the top of the rotating disk downwards. An inclined groove is formed on the inner circumference of the discharge channel in the direction away from the center of the rotating disk. A blocking slider is slidably disposed inside the inclined groove. In the initial state, the blocking slider blocks the discharge channel.

[0008] As a preferred embodiment of the present invention, there are several catalyst storage cylinders distributed in a ring along the rotating disk. The catalyst storage cylinders penetrate the top of the rotating disk and extend into the interior of the reactor. The catalyst storage cylinders are hollow columnar structures with open tops. The catalyst storage cylinders extend into the interior of the collection bottle, and their tops are level with the bottom wall of the collection bottle.

[0009] As a preferred embodiment of the present invention, the number of discharge channels corresponds to the number of catalyst storage cylinders, and each discharge channel is located between two adjacent catalyst storage cylinders. The top of the discharge channel is funnel-shaped, and the bottom of the collection bottle is provided with an inlet corresponding to the position of the discharge channel. The inlet forms a conductive structure between the collection bottle and the interior of the discharge channel.

[0010] As a preferred embodiment of the present invention, an annular groove is provided at the lower part of the outer ring surface of the pusher piston, an adsorption magnetic block is fixedly arranged around the annular groove, a driving magnetic ring is slidably arranged around the catalyst storage cylinder, and a support plate is fixedly arranged around the drive magnetic ring. The support plate is movable along the axial direction of the catalyst storage cylinder, and a float is fixedly arranged at the bottom of the support plate.

[0011] As a preferred embodiment of the present invention, the outer ring surface of the pusher piston is provided with at least one sealing groove, and a sealing ring is fixedly provided inside the sealing groove. The sealing ring is used for sealing between the pusher piston and the catalyst storage cylinder.

[0012] As a preferred embodiment of the present invention, a guide elbow is threadedly installed at the bottom of the discharge channel, and the bottom of the guide elbow is bent toward the side away from the center of the rotating disk.

[0013] As a preferred embodiment of the present invention, the outer ring surface of the rotating disk is provided with a plurality of annularly distributed induction grooves, and an induction magnetic block is fixedly arranged inside each induction groove. An electromagnetic coil is fixedly arranged around the reaction vessel, and the electromagnetic coil is located around the induction magnetic block. When the electromagnetic coil is energized, it generates an alternating magnetic field, which drives the induction magnetic block and the rotating disk to rotate alternately in both directions.

[0014] As a preferred embodiment of the present invention, a positioning frame is fixedly provided on the top of the reactor, a positioning ball groove is provided on the inner ring surface of the positioning frame, and a matching ball groove is provided on the outer ring surface of the rotating disk, which matches the specifications of the positioning ball groove. A plurality of supporting balls are rolled between the positioning ball groove and the matching ball groove.

[0015] As a preferred embodiment of the present invention, a sealing end cap is threadedly installed on the top of the material collection bottle, two raw material feed pipes are fixedly installed on the upper part of the reactor, the inside of the raw material feed pipes is connected to the inside of the reactor, a product discharge pipe is fixedly installed at the bottom of the reactor, the inside of the product discharge pipe is connected to the inside of the reactor, and valves are installed at the ends of both the raw material feed pipes and the product discharge pipes.

[0016] A method for synthesizing triacetin using an integrated synthetic reaction apparatus includes the following steps: S1, inject concentrated sulfuric acid catalyst into the material collection bottle (204), the catalyst flows into the catalyst storage cylinder (203) until the liquid level is level with the top of the cylinder, and seal the material collection bottle (204). S2, glycerol and acetic acid are introduced into the reactor (201). The float (2011) rises with the raw material liquid level and drives the pusher piston (205) to move upward through magnetic coupling, pushing the corresponding volume of catalyst into the collection bottle (204) to complete the quantitative measurement of catalyst. S3, start the electromagnetic drive component to drive the rotating disk (202) to rotate alternately in the forward and reverse directions, first stirring and mixing the raw materials; when rotating, the blocking slider (2016) slides outward under centrifugal force, the discharge channel (2014) opens, and the catalyst is evenly discharged into the reaction liquid; when the rotation direction is switched, the blocking slider (2016) resets and closes the channel, realizing intermittent addition until the esterification reaction is completed.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Adaptive quantitative control, reliable and stable purely mechanical structure: Utilizing the buoyancy of the raw material liquid level as power, a float-magnetic coupling-piston mechanism precisely pushes the corresponding volume of catalyst, automatically matching the catalyst dosage with the raw material dosage. No manual weighing is required, nor are there sensors, solenoid valves, or other electrical components, completely avoiding equipment failure problems caused by concentrated sulfuric acid corrosion. It features a simple structure, reliable operation, and low maintenance costs.

[0018] 2. Synchronized stirring and addition, precise timing of addition: The power for catalyst addition comes directly from the centrifugal force of stirring. The addition is automatically started after the material begins to be stirred and mixed, and automatically turned off when stirring stops, realizing the process sequence of "mixing first and then adding". No additional control mechanism is required, ensuring that the raw materials have been initially mixed when the catalyst is added, avoiding uneven concentration in some areas.

[0019] 3. Alternating forward and reverse stirring and intermittent addition improve reaction quality: Compared with unidirectional stirring, electromagnetically driven alternating forward and reverse stirring mixes more evenly and eliminates dead zones; at the same time, the centrifugal force disappears briefly during the interval of rotation direction switching, and the discharge channel closes automatically, realizing intermittent and uniform addition of catalyst, avoiding excessively high local concentrations caused by concentrated addition at one time, effectively reducing side reactions and improving product purity and yield.

[0020] 4. Integrated process and easy operation: One power source (electromagnetic alternating magnetic field) realizes three functions of quantitative measurement, stirring and addition at the same time. The structure is compact and the reaction can be completed by simply passing in the raw materials and starting the power. The operation process is simplified and the production efficiency is high. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the reaction catalysis mechanism in this invention; Figure 3 This is a side sectional view of the reaction vessel in this invention; Figure 4 This is a schematic diagram of the bottom structure of the rotating disk in this invention; Figure 5 This is a side sectional view of the rotating disk in this invention; Figure 6 This is a side cross-sectional view of the catalyst storage cylinder in this invention; Figure 7 This is a schematic diagram of the pusher piston in this invention; Figure 8 In this invention Figure 3 A partially enlarged structural diagram.

[0022] In the diagram: 100, aluminum profile frame; 200, reaction catalysis mechanism; 201, reaction vessel; 202, rotating disk; 203, catalyst storage cylinder; 204, material collection bottle; 205, pusher piston; 206, annular groove; 207, adsorption magnetic block; 208, drive magnetic ring; 209, support plate; 2011, float; 2012, sealing groove; 2013, sealing ring; 2014, discharge channel; 2 015. Inclined chute; 2016. Blocking slider; 2017. Guide elbow; 2018. Feed inlet; 2019. Induction groove; 2020. Induction magnetic block; 2021. Positioning frame; 2022. Electromagnetic coil; 2023. Sealing end cap; 2024. Raw material feed pipe; 2025. Product discharge pipe; 2026. Positioning ball groove; 2027. Matching ball groove; 2028. Supporting ball. Detailed Implementation

[0023] 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.

[0024] Please see Figures 1 to 8 The technical solution provided by the present invention specifically includes the following embodiments: 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1 to 8 This invention provides an integrated triacetin synthesis reaction apparatus, comprising an aluminum profile frame 100 and a reaction catalytic mechanism 200 fixedly disposed inside the aluminum profile frame 100. The aluminum profile frame 100 is constructed from industrial aluminum profiles, providing stable support for the entire apparatus. The reaction catalytic mechanism 200 is used for the integrated triacetin synthesis reaction.

[0026] The core of the reaction catalysis mechanism 200 is a reactor 201 fixedly installed inside an aluminum profile frame 100. The reactor 201 is a corrosion-resistant, sealed container, its internal chamber providing space for the esterification reaction. The top of the reactor 201 has an opening, through which a rotating disk 202 is rotatably mounted via a rolling support structure. The rotating disk 202 is a disc-shaped component, inside which a catalyst storage cylinder 203 is vertically fixed. There are several catalyst storage cylinders 203, preferably three, evenly distributed in a ring around the circumference of the rotating disk 202. Each catalyst storage cylinder 203 penetrates the top of the rotating disk 202, extending downwards into the interior of the reactor 201 and upwards out of the rotating disk 202. The catalyst storage cylinder 203 is a hollow cylindrical structure with an open top, its internal cavity used for pre-storing liquid catalyst.

[0027] A material collection bottle 204 is fixedly mounted on the top of the rotating disk 202. The material collection bottle 204 is an annular groove, the bottom wall of which is flush with the top of each catalyst storage cylinder 203, so that the top opening of each catalyst storage cylinder 203 extends exactly into the interior of the material collection bottle 204. A sealing end cap 2023 is detachably installed at the top opening of the material collection bottle 204 by means of threads.

[0028] A pusher piston 205 is slidably disposed inside each catalyst storage cylinder 203. The pusher piston 205 is used to push the catalyst stored in the catalyst storage cylinder 203 upward into the collection bottle 204. The outer ring surface of the pusher piston 205 has at least one sealing groove 2012, and a sealing ring 2013 is fixedly embedded inside the sealing groove 2012. The sealing ring 2013 is made of highly corrosion-resistant materials such as perfluoroether rubber or PTFE-coated rubber, and is tightly attached to the inner wall of the catalyst storage cylinder 203 to form a sliding seal, effectively preventing the catalyst from leaking downward into the reactor 201 from the gap between the pusher piston 205 and the storage cylinder wall.

[0029] To achieve adaptive quantitative feeding based on the raw material level, the feed piston 205 is driven by a non-contact magnetic coupling mechanism. Specifically, an annular groove 206 is formed on the lower part of the outer ring surface of the feed piston 205, and an adsorption magnetic block 207 is fixedly embedded around the annular groove 206 as the first magnetic element. A driving magnetic ring 208 is slidably fitted around the periphery of each catalyst storage cylinder 203 as the second magnetic element. The inner diameter of the driving magnetic ring 208 is slightly larger than the outer diameter of the catalyst storage cylinder 203, and it can slide freely along its outer wall. The periphery of all driving magnetic rings 208 is fixedly connected to a support plate 209, which is an annular flat plate that can move along the axial direction of the catalyst storage cylinder 203 together with the driving magnetic rings 208. A float 2011 is fixedly installed at the bottom of the support plate 209. The float 2011 is located inside the reactor 201, in direct contact with the reactants, and is used to sense changes in liquid level and provide buoyancy.

[0030] The rotating disk 202 is also provided with discharge channels 2014. The number of discharge channels 2014 is the same as the number of catalyst storage cylinders 203, and each discharge channel 2014 is located within the rotating disk body between two adjacent catalyst storage cylinders 203. The top of the discharge channel 2014 is machined into a funnel shape to facilitate the convergence and inflow of catalyst. The inner bottom wall of the collection bottle 204 has a feed inlet 2018 at the funnel opening position corresponding to each discharge channel 2014, and the feed inlet 2018 completely connects the internal space of the collection bottle 204 with the internal space of the discharge channel 2014. A guide elbow 2017 is threadedly installed at the bottom outlet of the discharge channel 2014. The outlet end of the guide elbow 2017 is bent away from the center of the rotating disk 202 to disperse the outflowing catalyst outward along the radial direction of the reactor 201.

[0031] On the inner ring surface of the discharge channel 2014, an inclined groove 2015 is formed in the direction away from the center of the rotating disk 202. Specifically, the inclined groove 2015 is an inclined, extending chute, with its end near the center of the rotating disk 202 being lower in height than its end away from the center, forming a gradually rising slope. A blocking slider 2016 is slidably disposed inside the inclined groove 2015. In its initial static state, the blocking slider 2016, under its own weight, will slide down the slope and stably stop at the lowest point of the inclined groove 2015, i.e., the position closest to the center of the rotating disk 202. At this time, the block of the blocking slider 2016 completely blocks the passage of the discharge channel 2014.

[0032] The rotation of the rotating disk 202 is achieved by an electromagnetic drive assembly. Several evenly distributed annular induction slots 2019 are formed on the outer ring surface of the rotating disk 202, and an induction magnetic block 2020 is fixedly embedded inside each induction slot 2019. A ring-shaped electromagnetic coil 2022 is fixedly mounted around the periphery of the reaction vessel 201, directly opposite the induction magnetic block 2020. When an alternating current is applied to the electromagnetic coil 2022, an alternating magnetic field is generated. This magnetic field acts on the induction magnetic block 2020, producing a continuous magnetic torque, thereby driving the rotating disk 202 and all its accessories to rotate alternately in both directions.

[0033] To ensure smooth rotation and precise positioning of the rotating disk 202, a positioning frame 2021 is fixedly installed at the top opening of the reactor 201. The positioning frame 2021 is annular, with a ring of positioning ball grooves 2026 on its inner ring surface. A ring of mating ball grooves 2027, matching the specifications of the positioning ball grooves 2026, is formed on the outer ring surface of the rotating disk 202. Several support balls 2028 are evenly rolled on the raceway formed between the positioning ball grooves 2026 and the mating ball grooves 2027, thus forming a rolling support structure similar to a thrust ball bearing, significantly reducing the frictional force when the rotating disk 202 rotates.

[0034] Two independent feed pipes 2024 are fixedly connected to the upper side wall of the reactor 201. The inner ends of both feed pipes 2024 are connected to the inner cavity of the reactor 201, and the outer ends are used to connect to the glycerol supply line and the acetic acid supply line, respectively. A product discharge pipe 2025 is fixedly connected to the center of the bottom of the reactor 201 for discharging the mixture after the reaction is completed. Valves are installed at the outer ends of both the feed pipes 2024 and the product discharge pipe 2025.

[0035] The working process and synthesis method of the device of the present invention will be described in detail below with reference to specific operating steps.

[0036] Step 1: Catalyst pre-loading First, unscrew the sealing cap 2023 and slowly inject the liquid catalyst (concentrated sulfuric acid in this embodiment) through the top opening of the collection bottle 204. The concentrated sulfuric acid flows into the interior of the three catalyst storage cylinders 203 along the opening. As the injection proceeds, the liquid level in the storage cylinders gradually rises until the liquid level in all three catalyst storage cylinders 203 is level with the height of the top opening of the cylinder, at which point the injection is stopped. Then, rescrew the sealing cap 2023 onto the top of the collection bottle 204 to complete the pre-loading of the catalyst. At this point, the catalyst is sealed in the cavity formed by the storage cylinders and the collection bottle, and the pusher piston 205 is at the lowest point of its stroke.

[0037] Step 2: Raw material introduction and automatic catalyst metering Open the valves at the ends of the two raw material feed pipes 2024, and introduce liquid glycerol and acetic acid into the reactor 201 according to the set ratio. As the two raw materials are continuously introduced, the mixed liquid level in the reactor 201 gradually rises. When the liquid surface submerges the float 2011, the float 2011 begins to experience upward buoyancy. As the liquid level continues to rise, the float 2011, under the action of buoyancy, pushes the support plate 209 and the three drive magnetic rings 208 fixedly connected to it to move upward together.

[0038] When the driving magnetic ring 208 moves upward, it attracts the adsorption magnetic block 207 fixed on the pusher piston 205 through magnetic coupling, across the wall of the catalyst storage cylinder 203. Driven by the magnetic force, the pusher piston 205 slides upward synchronously inside the catalyst storage cylinder 203, pushing the concentrated sulfuric acid above it upward. The pushed concentrated sulfuric acid overflows from the top opening of the catalyst storage cylinder 203 and enters the collection bottle 204 for temporary storage.

[0039] Because the upward movement of the float 2011 is directly proportional to the liquid level in the reactor 201, and the stroke of the pusher piston 205 is synchronized with the stroke of the float 2011, the amount of catalyst pushed into the collection bottle 204 is precisely proportional to the total volume of raw materials. The more raw materials there are, the more catalyst is quantitatively pushed out, achieving fully automated adaptive matching between the catalyst addition amount and the raw material volume. The entire process requires no manual intervention or electrical control.

[0040] Step 3: Stirring and mixing, and batch catalytic reaction After the automatic dispensing of catalyst is completed, the alternating power supply to the electromagnetic coil 2022 is turned on. The alternating magnetic field generated by the electromagnetic coil 2022 drives the rotating disk 202, which is embedded with the induction magnetic block 2020, to begin rotating alternately in both directions. When the rotating disk 202 rotates, it drives the catalyst storage cylinder 203 fixed on it to rotate together. The multiple catalyst storage cylinders 203 extending into the reactor 201 act as stirring paddles when rotating, vigorously stirring the glycerol and acetic acid raw materials in the reactor alternately in both directions, so that the two raw materials are rapidly and uniformly mixed macroscopically.

[0041] Meanwhile, the rotation of the rotating disk 202 also provides power for the addition of catalyst. When the rotating disk 202 rotates, the blockage slider 2016 located in the inclined chute 2015 rotates along with it and is subjected to a centrifugal force pointing radially outward. This centrifugal force overcomes the gravitational component of the blockage slider 2016 and pushes it to slide upward along the gradually rising inclined chute 2015. When the blockage slider 2016 slides away from the path area of ​​the discharge channel 2014, the discharge channel 2014 is opened. The quantitative concentrated sulfuric acid previously temporarily stored in the collection bottle 204 flows into the corresponding discharge channel 2014 through each feed port 2018 under the action of gravity, and is then evenly dispersed and sprayed into the raw material mixture being stirred along the radial direction of the reactor 201 through the guide elbow 2017 at the bottom, and the catalytic esterification reaction begins.

[0042] A significant advantage of the device of this invention is that, because the rotating disk 202 rotates alternately in both directions, it inevitably experiences a moment when its rotational speed drops to zero or extremely low when switching directions. During this reversal interval, the centrifugal force disappears instantly or weakens significantly. Under the combined action of its own gravity and the inclined guide of the inclined chute 2015, the blocking slider 2016 quickly slides along the inclined chute to its lowest point, that is, returns to a position close to the center of the rotating disk, and tightly seals the discharge channel 2014 again, thus immediately stopping the addition of catalyst. When the rotating disk 202 completes the reversal and accelerates its rotation again, the centrifugal force is generated again and the channel is reopened, and the addition of catalyst resumes. This process is repeated continuously with stirring, achieving pulsed, intermittent, and uniform addition of catalyst, effectively preventing localized overheating and side reactions caused by a single concentrated addition of concentrated sulfuric acid.

[0043] Step 4: Product discharge After the esterification reaction is complete, the power supply to the electromagnetic coil 2022 is turned off, and the rotating disk 202 stops rotating. With the centrifugal force gone, the blocking slider 2016 resets under gravity and permanently seals the discharge channel 2014, automatically terminating catalyst addition. At this point, the valve at the end of the product discharge pipe 2025 is opened, allowing the mixture containing triacetin esters after the reaction to be discharged from the bottom of the reactor 201 and sent to subsequent separation and purification processes to obtain the finished product.

[0044] 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 variations 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. An integrated synthesis apparatus for triacetin, comprising: An aluminum profile frame (100) and a reaction catalytic mechanism (200) are characterized in that: the reaction catalytic mechanism (200) is fixedly disposed inside the aluminum profile frame (100), and the reaction catalytic mechanism (200) is used for the integrated synthesis reaction of triacetin, wherein the reaction catalytic mechanism (200) includes a reaction vessel (201) fixedly disposed inside the aluminum profile frame (100), a rotating disk (202) is rotatably disposed on the top of the reaction vessel (201), and a catalyst storage cylinder (203) is vertically fixed inside the rotating disk (202). A pusher piston (205) is slidably disposed inside the catalyst storage cylinder (203). A collection bottle (204) is fixedly disposed on the top of the rotating disk (202). A discharge channel (2014) is opened downward through the top of the rotating disk (202). An inclined groove (2015) is opened on the inner ring of the discharge channel (2014) in the direction away from the center of the rotating disk (202). A blocking slider (2016) is slidably disposed inside the inclined groove (2015). In the initial state, the blocking slider (2016) blocks the discharge channel (2014).

2. The integrated triacetin synthesis reaction apparatus according to claim 1, characterized in that: The catalyst storage cylinders (203) are numerous and are distributed in a ring along the rotating disk (202). The catalyst storage cylinders (203) penetrate the top of the rotating disk (202) and extend into the interior of the reactor (201). The catalyst storage cylinders (203) are hollow columnar structures with open tops. The catalyst storage cylinders (203) extend into the interior of the collection bottle (204), and their tops are level with the bottom wall of the collection bottle (204).

3. The integrated triacetin synthesis reaction apparatus according to claim 2, characterized in that: The number of discharge channels (2014) corresponds to the number of catalyst storage cylinders (203), and each discharge channel (2014) is located between two adjacent catalyst storage cylinders (203). The top of the discharge channel (2014) is funnel-shaped. The bottom of the collection bottle (204) is provided with an inlet (2018) at the position corresponding to the discharge channel (2014). The inlet (2018) forms a conductive structure between the collection bottle (204) and the discharge channel (2014).

4. The integrated triacetin synthesis reaction apparatus according to claim 3, characterized in that: The lower part of the outer ring surface of the pusher piston (205) is provided with an annular groove (206). An adsorption magnetic block (207) is fixedly arranged around the annular groove (206). A driving magnetic ring (208) is slidably arranged around the catalyst storage cylinder (203). A support plate (209) is fixedly arranged around the drive magnetic ring (208). The support plate (209) is movable along the axial direction of the catalyst storage cylinder (203). A float ball (2011) is fixedly arranged at the bottom of the support plate (209).

5. The integrated triacetin synthesis reaction apparatus according to claim 4, characterized in that: The outer ring surface of the pusher piston (205) is provided with at least one sealing groove (2012), and a sealing ring (2013) is fixedly provided inside the sealing groove (2012). The sealing ring (2013) is used for sealing between the pusher piston (205) and the catalyst storage cylinder (203).

6. The integrated triacetin synthesis reaction apparatus according to claim 5, characterized in that: The bottom of the discharge channel (2014) is threaded with a guide elbow (2017), and the bottom of the guide elbow (2017) is bent toward the side away from the center of the rotating disk (202).

7. The integrated triacetin synthesis reaction apparatus according to claim 6, characterized in that: The outer ring surface of the rotating disk (202) is provided with a number of annularly distributed induction grooves (2019). Induction magnetic blocks (2020) are fixedly installed inside each induction groove (2019). An electromagnetic coil (2022) is fixedly installed around the reactor (201). The electromagnetic coil (2022) is located around the induction magnetic blocks (2020). When the electromagnetic coil (2022) is energized, it generates an alternating magnetic field, which drives the induction magnetic blocks (2020) and the rotating disk (202) to rotate alternately in both directions.

8. The integrated triacetin synthesis reaction apparatus according to claim 7, characterized in that: A positioning frame (2021) is fixedly installed on the top of the reactor (201). The inner ring surface of the positioning frame (2021) is provided with a positioning ball groove (2026). The outer ring surface of the rotating disk (202) is provided with a matching ball groove (2027) that matches the specifications of the positioning ball groove (2026). Several supporting balls (2028) are rolled between the positioning ball groove (2026) and the matching ball groove (2027).

9. The integrated triacetin synthesis reaction apparatus according to claim 8, characterized in that: The top of the material collection bottle (204) is threaded with a sealing end cap (2023). The upper part of the reactor (201) is fixedly provided with two raw material feed pipes (2024). The inside of the raw material feed pipes (2024) is connected to the inside of the reactor (201). The bottom of the reactor (201) is fixedly provided with a product discharge pipe (2025). The inside of the product discharge pipe (2025) is connected to the inside of the reactor (201). Valves are provided at the ends of both the raw material feed pipes (2024) and the product discharge pipes (2025).

10. The synthesis method of the integrated triacetin synthesis reaction apparatus according to claim 9, characterized in that, Includes the following steps: S1, inject concentrated sulfuric acid catalyst into the material collection bottle (204), the catalyst flows into the catalyst storage cylinder (203) until the liquid level is level with the top of the cylinder, and seal the material collection bottle (204). S2, glycerol and acetic acid are introduced into the reactor (201). The float (2011) rises with the raw material liquid level and drives the pusher piston (205) to move upward through magnetic coupling, pushing the corresponding volume of catalyst into the collection bottle (204) to complete the quantitative measurement of catalyst. S3, start the electromagnetic drive component to drive the rotating disk (202) to rotate alternately in the forward and reverse directions, first stirring and mixing the raw materials; when rotating, the blocking slider (2016) slides outward under centrifugal force, the discharge channel (2014) opens, and the catalyst is evenly discharged into the reaction liquid; when the rotation direction is switched, the blocking slider (2016) resets and closes the channel, realizing intermittent addition until the esterification reaction is completed.

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