An apparatus and method for producing p-tert-butylcyclohexyl acetate

Abstract

This invention discloses an apparatus and method for producing p-tert-butylcyclohexyl acetate, relating to the field of p-tert-butylcyclohexyl acetate production technology. It has the advantage of reducing liquid flow after stirring stops. The key technical points are: a washing vessel and a stirring shaft rotatably connected to the top of the washing vessel; several stirring plates are provided on the stirring shaft, and each stirring plate is evenly distributed along the circumference of the stirring shaft; a sealing component is provided on the washing vessel to reduce the gap between each stirring plate and the inner wall of the washing vessel; a driven gear is coaxially provided on the stirring shaft and located outside the washing vessel; a first motor is provided on the washing vessel via a first bracket, and a drive gear meshing with the driven gear is provided at one end of the rotating shaft of the first motor; a feed pipe is provided at the top of the washing vessel; and a discharge pipe with a valve is provided at the bottom of the washing vessel.

Description

Technical Field

[0001] This invention relates to the field of p-tert-butylcyclohexyl acetate production technology, specifically to an apparatus and method for producing p-tert-butylcyclohexyl acetate. Background Technology

[0002] p-tert-butylcyclohexyl acetate is a commonly used synthetic fragrance product, commonly known as iris ester. It has floral, woody, and iris aromas, and is a liquid. It is a mixture of cis and trans isomers, typically in a 3:7 ratio, with the cis form having a stronger aroma than the trans form. It is widely used in fragrance formulations for soaps, cosmetics, shampoos, and other daily chemical products.

[0003] Currently, Chinese patent application number CN201710964958.6 discloses a method for producing a synthetic fragrance using iris esters, including the following steps:

[0004] a) First, add petroleum ether into the reactor through a high-level tank, then add anhydrous aluminum trichloride into the reactor through a hand hole, turn on the stirrer and the chilled brine valve, turn on the hydrochloric acid falling film absorption tower, and lower the temperature of the reactor to 0 to -15℃.

[0005] b) Slowly add phenol to the reactor, maintain the reactor temperature at 0 to -15°C, and continue stirring for 1 to 3 hours after the feeding is completed;

[0006] c) Continue to maintain the reactor temperature at 0 to -15°C. Add tert-butanol dropwise into the reactor from the high-level tank using a dropper pump. Control the dropwise addition time to 4 to 12 hours. After the dropwise addition is completed, close the chilled brine valve and heat the reactor to 100 to 150°C. Continue stirring for 4 to 8 hours.

[0007] d) Take samples for chromatographic detection. When the phenol content is ≤0.5%, lower the temperature of the reaction system to -5 to -15℃, turn on the stirrer and the valve of the frozen brine, slowly add water for extraction and terminate the reaction. During the extraction process, control the temperature of the reaction vessel to <40℃.

[0008] e) The generated p-tert-butylphenol reaction solution is pumped into a cone-bottom stirred tank and allowed to stand for 2-4 hours to separate into layers. The oil layer is then placed into an alkaline washing stirred tank, and petroleum ether is added to the water layer. The stirrer is turned on and stirred for 1-3 hours. The mixture is allowed to stand for 2-4 hours to separate into layers. The oil layer is then placed into an alkaline washing stirred tank, and the water layer is discharged into a wastewater treatment plant for treatment.

[0009] f) Add water to the sodium hydroxide stirred tank in a metered manner, then add a certain amount of sodium hydroxide into the sodium hydroxide stirred tank through the hand hole, turn on the stirrer to prepare a 5% sodium hydroxide solution, and pump it into the sodium hydroxide solution high-level tank;

[0010] g) Add sodium hydroxide solution to the alkaline washing stirred tank through the sodium hydroxide solution high-level tank, turn on the stirrer to perform alkaline washing on the collected oil layer, stir for 1-3 hours and let it stand for 2-4 hours to separate the layers, pump the alkaline solution layer into the alkaline solution high-level tank for the next batch, add water to the oil layer for water washing, stir for 1-3 hours and let it stand for 2-4 hours to separate the layers, transfer the oil layer to the hydrogenation reactor, and discharge the water layer into the sewage treatment plant for treatment;

[0011] h) Add palladium-on-carbon catalyst to the hydrogenation reactor in a single quantitative manner, seal the hydrogenation reactor, purge with nitrogen 4 to 6 times, then purge with nitrogen to a pressure of 2.0 MPa. After the system pressure stabilizes, purge with hydrogen 4 to 6 times, then purge with hydrogen and adjust the pressure of the hydrogenation reactor to 2.0 MPa.

[0012] i) After the system pressure stabilizes, close the hydrogen inlet valve, raise the temperature to 80-150°C, and after the reaction system pressure is balanced, open the hydrogen valve, maintain the reaction pressure at 2.0 MPa, and the reaction time is 5-15 hours.

[0013] j) After reacting for 5 hours, samples are taken every 2 hours for chromatographic analysis. The reaction is terminated and the pressure is released when the p-tert-butylphenol content is ≤0.5%.

[0014] k) The generated p-tert-butylcyclohexanol reaction solution is sent to a precision filter for filtration under nitrogen pressure. The liquid filtrate from the filter is sent to a batch distillation column under nitrogen pressure. The solid catalyst in the filter is pumped into the precision filter with petroleum ether through a diaphragm pump and backwashed into the hydrogenation reactor for the next batch of hydrogenation reaction.

[0015] l) Open the steam valve to heat the distillation kettle. Recover petroleum ether at atmospheric pressure and kettle temperature of 60-90℃. Stop the recovery of petroleum ether when the temperature at the top of the tower drops or there is no material output. The recovered petroleum ether is pumped into the petroleum ether high-level tank for reuse using a material pump. The distillation kettle liquid is sent to the esterification reaction kettle under nitrogen pressure.

[0016] m) Add acetic anhydride to the esterification reactor through the high-level acetic anhydride tank, then add p-toluenesulfonic acid to the reactor through the hand hole, turn on the stirrer, turn on the steam valve to heat the esterification reactor, control the reaction temperature to 80-150℃, the reaction time to 5-15 hours, and then transfer the reaction liquid to a batch distillation column.

[0017] n) Open the steam valve to heat the distillation kettle. Recover acetic acid at atmospheric pressure and kettle temperature of 100-120℃. Stop acetic acid recovery when the temperature at the top of the column drops or there is no material output. The recovered acetic acid is pumped into the high-level acetic acid tank using a material pump. The distillation kettle liquid is sent to the water washing kettle under nitrogen pressure.

[0018] o) Add sodium hydroxide solution metered from the sodium hydroxide solution high-level tank to the water washing kettle, turn on the stirrer, stir for 1-3 hours and let it stand for 2-4 hours to separate into layers. The alkali layer is pumped into the alkali solution high-level tank for the next batch. The oil layer is then washed with water, stirred for 1-3 hours and let it stand for 2-4 hours to separate into layers. The oil layer is transferred to the distillation kettle of the batch distillation column, and the water layer is discharged into the sewage treatment plant for treatment.

[0019] p) Open the steam valve to heat the distillation vessel. When the vessel temperature reaches 100-150°C, turn on the vacuum pump. Perform fractionation at a top temperature of 105-110°C, a pressure of 1000-1333Pa, and a reflux ratio of 1:1-1:12. Collect the iris ester product. When the top temperature drops or there is no output, stop the distillation, cool down, and pressurize the vessel residue.

[0020] In the above-mentioned prior art preparation step o, sodium hydroxide solution is metered and added to the water washing tank, the stirrer is turned on, and after stirring for 1 to 3 hours, the mixture is allowed to stand and separate into layers for 2 to 4 hours. After stirring is stopped, the liquid in the water washing tank will continue to flow, which increases the subsequent standing and separation time. Therefore, the applicant has developed a new technical solution in the actual production process to solve the above-mentioned technical problems. Summary of the Invention

[0021] To address the aforementioned technical shortcomings, the present invention aims to provide an apparatus and method for producing p-tert-butylcyclohexyl acetate, which has the advantage of reducing liquid flow after stirring is stopped.

[0022] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0023] This invention provides a production apparatus for p-tert-butylcyclohexyl acetate, comprising a washing tank and a stirring shaft rotatably connected to the top of the washing tank. The stirring shaft has several vertically arranged stirring plates, all evenly distributed circumferentially along the shaft. The washing tank is equipped with a sealing element to reduce the gap between the stirring plates and the inner wall of the tank. The top of the stirring shaft passes through the washing tank and is located outside it. A driven gear is coaxially arranged on the stirring shaft and located outside the washing tank. A first motor is mounted on the washing tank via a first bracket, and one end of the rotating shaft of the first motor has a drive gear meshing with the driven gear. When the stirring shaft rotates, the sealing element rotates along the axis of rotation of the stirring shaft. The top of the washing tank has a feed pipe, and the bottom of the washing tank has a discharge pipe with a valve.

[0024] By adopting the above technical solution, when the first motor is turned on, the rotating shaft of the first motor drives the drive gear to rotate, and the drive gear drives the stirring shaft to rotate through the driven gear inside it. At this time, the liquid in the washing tank can be stirred by the stirring plates on the stirring shaft. When the stirring is completed, the first motor stops working, so that the stirring shaft stops rotating. Then, the gap between each stirring plate and the inner wall of the washing tank is reduced by the sealing component. At this time, the liquid in the washing tank can be separated by each stirring plate and the sealing component, thereby reducing the occurrence of liquid continuing to flow after stirring stops, reducing the subsequent settling and stratification time, and making it simple and convenient to use.

[0025] Preferably, the sealing component includes a rotating ring sleeved on the stirring shaft and a plurality of first baffles disposed at the bottom end of the rotating ring. Each stirring plate is located below the rotating ring, and each first baffle corresponds to each stirring plate. The bottom end of the first baffle is located between one side of the stirring plate and the inner wall of the washing tank. A driving rod is vertically disposed above one side of the stirring shaft. A driving groove is provided on the inner wall of the rotating ring for one end of the driving rod to pass vertically through. A pushing component is provided on the washing tank for pushing the rotating ring to move vertically up and down.

[0026] Preferably, the pushing component includes an annular groove coaxially disposed at the top of the rotating ring and a slider slidably connected in the annular groove. A screw is vertically disposed at the top of the slider. A groove corresponding to the screw is opened at the top of the washing tank. The top of the screw extends vertically to the outside of the washing tank through the groove. A threaded cylinder located outside the washing tank is threadedly connected to the screw, and the bottom end of the threaded cylinder is rotatably connected to the top of the washing tank. A first gear is coaxially disposed on the outer wall of the threaded cylinder. A second motor is disposed at the top of the washing tank through a second bracket, and a second gear meshing with the first gear is disposed at one end of the rotating shaft of the second motor.

[0027] Preferably, the top end of the rotating ring is provided with a plurality of connecting grooves, and each connecting groove is located on the inner and outer sides of the annular groove respectively.

[0028] Preferably, the sealing component includes several circular grooves disposed below the side wall of the stirring shaft, and each circular groove is evenly distributed along the circumference of the stirring shaft. Each circular groove is rotatably connected to a rotating column, and each rotating column is horizontally provided with a second baffle located outside the circular groove. Each second baffle is located below the stirring plate, and each second baffle corresponds to each stirring plate. When the stirring shaft stops rotating, the stirring shaft is provided with a driving component for simultaneously driving each rotating column to rotate within the circular groove.

[0029] Preferably, the driving component includes a central groove coaxially disposed at the top end of the stirring shaft, each of the circular grooves communicating with the central groove, a first bevel gear rotatably connected to the bottom of the central groove, and a second bevel gear coaxially disposed on each of the rotating columns, located in the central groove and meshing with the first bevel gear. A column is vertically disposed at the top end of the first bevel gear, and the top end of the column is flush with the top end of the stirring shaft. When the stirring shaft rotates, a connecting component is provided on the stirring shaft to drive the column to rotate with the stirring shaft.

[0030] Preferably, each of the horizontally arranged second baffles is provided with a plurality of auxiliary stirring rods at its top and bottom ends.

[0031] Preferably, the connector includes a placement groove disposed at the top of the column and communicating with one side of the column; the top of the stirring shaft is provided with several slots, and each slot is evenly distributed along the circumference of the stirring shaft and communicates with the central groove; a rod is horizontally slidably connected in the placement groove, and one end of the rod extends out of the placement groove and is horizontally inserted into one of the slots; a compression spring is provided at the end of the rod located in the placement groove, and the end of the compression spring away from the rod is fixedly connected to one side wall of the placement groove; and a hand crank is provided at the top of the column.

[0032] Preferably, an observation window is provided on one side of the outer wall of the washing kettle.

[0033] Another objective of this invention is to provide a method for using an apparatus for producing p-tert-butylcyclohexyl acetate. By turning on a first motor, the rotating shaft of the first motor drives a drive gear to rotate. The drive gear, through its driven gear, drives a stirring shaft to rotate. At this time, the liquid in the washing vessel is stirred by the various stirring plates on the stirring shaft. After stirring is completed, the first motor stops working, causing the stirring shaft to stop rotating. Then, the gap between the stirring plates and the inner wall of the washing vessel is reduced by a sealing component. At this time, the liquid in the washing vessel is separated by the stirring plates and the sealing component, thereby reducing the occurrence of liquid continuing to flow after stirring stops and reducing the subsequent settling and stratification time.

[0034] The beneficial effects of this invention are as follows: When the first motor is turned on, the rotating shaft of the first motor drives the drive gear to rotate, and the drive gear drives the stirring shaft to rotate through the driven gear inside it. At this time, the liquid in the washing tank can be stirred by the stirring plates on the stirring shaft. When the stirring is completed, the first motor stops working, so that the stirring shaft stops rotating. Then, the gap between the stirring plates and the inner wall of the washing tank is reduced by the sealing component. At this time, the liquid in the washing tank can be separated by the stirring plates and the sealing component, thereby reducing the occurrence of liquid continuing to flow after stirring stops, reducing the subsequent settling and stratification time, and making it simple and convenient to use. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0037] Figure 2 This is a schematic diagram illustrating the structure of the first baffle in this embodiment;

[0038] Figure 3 This is a schematic diagram illustrating the structure of the observation window in this embodiment;

[0039] Figure 4 This is a schematic diagram illustrating the structure of the auxiliary stirring rod in this embodiment;

[0040] Figure 5 for Figure 4 Enlarged structural diagram of section A in the middle;

[0041] Figure 6 for Figure 4 Enlarged schematic diagram of the structure of section B.

[0042] Explanation of reference numerals in the attached figures:

[0043] In the diagram: 1. Washing vessel; 2. Stirring shaft; 3. Stirring plate; 4. Driven gear; 5. First support; 6. First motor; 7. Drive gear; 8. Feed pipe; 9. Discharge pipe; 10. Rotary ring; 12. First baffle; 13. Drive rod; 14. Drive groove; 15. Annular groove; 16. Slider; 17. Screw; 18. Groove; 19. Threaded cylinder; 20. First gear; 21. Second support; 22. Second motor; 23. Second gear; 24. Connecting groove; 25. Circular groove; 26. Rotating column; 27. Second baffle; 28. Central groove; 29. ​​First bevel gear; 30. Second bevel gear; 31. Column; 32. Auxiliary stirring rod; 33. Placement groove; 34. Slot; 35. Insert rod; 36. Compression spring; 37. Hand crank; 38. Observation window; 39. Drain hole. Detailed Implementation

[0044] 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.

[0045] Example 1: An apparatus for producing p-tert-butylcyclohexyl acetate, such as Figure 1 and Figure 2 The washing vessel includes a washing tank 1 and a stirring shaft 2 rotatably connected to the top of the washing tank 1. Several stirring plates 3 are vertically arranged on the stirring shaft 2, and each stirring plate 3 is evenly distributed along the circumference of the stirring shaft 2. The washing tank 1 is provided with a sealing member to reduce the gap between each stirring plate 3 and the inner wall of the washing tank 1. The top of the stirring shaft 2 passes through the washing tank 1 and is located outside the washing tank 1. A driven gear 4 located outside the washing tank 1 is coaxially arranged on the stirring shaft 2. A first motor 6 is provided on the washing tank 1 through a first bracket 5, and a drive gear 7 that meshes with the driven gear 4 is provided at one end of the rotating shaft of the first motor 6. When the stirring shaft 2 rotates, the sealing member rotates along the rotation axis of the stirring shaft 2. The top of the washing tank 1 is provided with a feed pipe 8, and the bottom of the washing tank 1 is provided with a discharge pipe 9 with a valve.

[0046] like Figure 1 and Figure 2 When the first motor 6 is turned on, the rotating shaft of the first motor 6 drives the drive gear 7 to rotate. The drive gear 7, through its driven gear 4, drives the stirring shaft 2 to rotate. At this time, the liquid in the washing tank 1 can be stirred by the stirring plates 3 on the stirring shaft 2. When the stirring is completed, the first motor 6 stops working, so that the stirring shaft 2 stops rotating. Then, the gap between the stirring plates 3 and the inner wall of the washing tank 1 is reduced by the sealing component. At this time, the liquid in the washing tank 1 can be separated by the stirring plates 3 and the sealing component, thereby reducing the occurrence of liquid continuing to flow after stirring stops and reducing the subsequent settling and stratification time. The first motor 6 is a servo motor, which is simple and convenient to use.

[0047] like Figure 2 The sealing component includes a rotating ring 10 sleeved on the stirring shaft 2 and several first baffles 12 disposed at the bottom of the rotating ring 10. Each stirring plate 3 is located below the rotating ring 10. Each first baffle 12 corresponds to each stirring plate 3, and the bottom end of the first baffle 12 is located between one side of the stirring plate 3 and the inner wall of the washing tank 1. A drive rod 13 is vertically disposed above one side of the stirring shaft 2. A drive groove 14 is disposed on the inner wall of the rotating ring 10 for one end of the drive rod to pass vertically through. A pusher is disposed on the washing tank 1 for pushing the rotating ring 10 to move vertically up and down.

[0048] like Figure 2Each first baffle 12 has its bottom end below the liquid surface inside the washing tank 1. When the stirring shaft 2 rotates, the stirring shaft 2 will drive the rotating ring 10 to rotate along the rotation axis of the stirring shaft 2 through the cooperation of the driving groove 14 and the driving rod 13. At this time, the liquid in the washing tank 1 can be further stirred by the first baffle 12 located between the stirring plate 3 and the inner wall of the washing tank 1 at the bottom end of the rotating ring 10. When the stirring is completed and the stirring shaft 2 stops rotating, the rotating ring 10 is pushed vertically downward by the pushing member until the bottom end of the first baffle 12 is flush with the bottom end of the stirring plate 3. At this time, the gap between the stirring plate 3 and the inner wall of the washing tank 1 can be reduced by the first baffle 12. At this time, the liquid in the washing tank 1 can be separated by each stirring plate 3 and the first baffle 12, thereby reducing the occurrence of liquid continuing to flow after stirring stops. It is simple and convenient to use.

[0049] like Figure 2 The pushing component includes an annular groove 15 coaxially disposed at the top of the rotating ring 10 and a slider 16 slidably connected in the annular groove 15. A screw 17 is vertically disposed at the top of the slider 16. A groove 18 corresponding to the screw 17 is opened at the top of the washing tank 1. The top of the screw 17 extends vertically to the outside of the washing tank 1 through the groove 18. A threaded cylinder 19 located outside the washing tank 1 is threadedly connected to the screw 17, and the bottom end of the threaded cylinder 19 is rotatably connected to the top of the washing tank 1. A first gear 20 is coaxially disposed on the outer wall of the threaded cylinder 19. A second motor 22 is disposed at the top of the washing tank 1 through a second bracket 21, and a second gear 23 meshing with the first gear 20 is disposed at one end of the rotating shaft of the second motor 22.

[0050] like Figure 2 When it is necessary to push the rotating ring 10 downward, simply turn on the second motor 22. The rotating shaft of the second motor 22 drives the second gear 23 to rotate clockwise. The second gear 23 drives the threaded cylinder 19 to rotate counterclockwise through the first gear 20 meshing with it. Since the threaded cylinder 19 is threadedly connected to the screw 17, when the threaded cylinder 19 rotates counterclockwise, the screw 17 pushes the slider 16 to drive the rotating ring 10 to move vertically downward through the cooperation between the threaded cylinder 19 and the screw 17. Since the slider 16 is slidably connected in the annular groove 15 and the annular groove 15 is coaxial with the rotating ring 10, the slider 16 will slide in the annular groove 15 when the rotating ring 10 rotates. It is simple and convenient to use.

[0051] like Figure 2The top of the rotating ring 10 is provided with several connecting grooves 24, and each connecting groove 24 is located on the inner and outer sides of the annular groove 15. The purpose of this setting is that when the liquid level in the washing tank 1 is above the stirring plate 3, the pusher pushes the rotating ring 10 to move vertically downward until the bottom end of the first baffle 12 is flush with the bottom end of the stirring plate 3. At this time, the rotating ring 10 will enter the liquid in the washing tank 1. At this time, the liquid flow above the stirring plate 3 can be blocked by the rotating ring 10 and the connecting grooves 24 on the rotating ring 10. At this time, several drainage holes 39 are provided at the bottom of the annular groove 15, which is simple and convenient to use.

[0052] like Figure 3 and Figure 4 and Figure 5 Alternatively, the enclosure includes several circular grooves 25 disposed below the side wall of the stirring shaft 2, and each circular groove 25 is evenly distributed along the circumference of the stirring shaft 2. Each circular groove 25 is rotatably connected to a rotating column 26, and each rotating column 26 is horizontally provided with a second baffle 27 located outside the circular groove 25. Each second baffle 27 is located below the stirring plate 3, and each second baffle 27 corresponds one-to-one with each stirring plate 3. When the stirring shaft 2 stops rotating, the stirring shaft 2 is provided with a driving member for simultaneously driving each rotating column 26 to rotate within the circular groove 25.

[0053] like Figure 3 and Figure 4 and Figure 5 When the stirring shaft 2 rotates, the second baffles 27 and rotating columns 26 will rotate along the rotation axis of the stirring shaft 2. When the stirring is completed and the stirring shaft 2 stops rotating, the driving component will simultaneously drive the rotating columns 26 to rotate in the circular groove 25. At this time, the rotating columns 26 will drive the second baffles 27 to rotate along the rotation axis of the rotating columns 26 in the circular groove 25 until the horizontal second baffles 27 are rotated 90 degrees to make them vertical. At this time, by rotating the second baffles 27 to the vertical position, the gap between the stirring plate 3 and the inner wall of the washing tank 1 can be reduced. At this time, the liquid in the washing tank 1 can be separated by the stirring plates 3 and the second baffles 27, thereby reducing the occurrence of liquid continuing to flow after the stirring stops. It is simple and convenient to use.

[0054] like Figure 3 and Figure 4 and Figure 5 and Figure 6The driving component includes a central groove 28 coaxially disposed at the top of the stirring shaft 2. Each circular groove 25 communicates with the central groove 28. A first bevel gear 29 is rotatably connected to the bottom of the central groove 28. Each rotating column 26 is coaxially provided with a second bevel gear 30 located within the central groove 28 and meshing with the first bevel gear 29. A vertical column 31 is vertically disposed at the top of the first bevel gear 29, and the top of the column 31 is flush with the top of the stirring shaft 2. When the stirring shaft 2 rotates, a connecting component is provided on the stirring shaft 2 to drive the column 31 to rotate with the stirring shaft 2. The connecting component includes components disposed on the column 31. The top of the column 31 is connected to a placement groove 33 on one side of the column 31. The top of the stirring shaft 2 is provided with several slots 34, and each slot 34 is evenly distributed along the circumference of the stirring shaft 2 and is connected to the central groove 28. A rod 35 is horizontally slidably connected in the placement groove 33, and one end of the rod 35 extends out of the placement groove 33 and is horizontally inserted into one of the slots 34. A compression spring 36 is provided at one end of the rod 35 in the placement groove 33, and the end of the compression spring 36 away from the rod 35 is fixedly connected to one side wall of the placement groove 33. A hand crank 37 is provided at the top of the column 31.

[0055] like Figure 3 and Figure 4 and Figure 5 and Figure 6 When the stirring shaft 2 rotates, one end of the insert rod 35 is horizontally inserted into one of the slots 34 on the stirring shaft 2. Therefore, when the stirring shaft 2 rotates, the column 31 can rotate with the stirring shaft 2 through the cooperation of the insert rod 35 and one of the slots 34. At this time, the first bevel gear 29, each of the second bevel gears 30, the second baffle 27, and the rotating column 26 will rotate with the stirring shaft 2 along the rotation axis of the stirring shaft 2. When the stirring is completed and the stirring shaft 2 stops rotating, if it is necessary to drive each rotating column 26 to rotate in the circular groove 25 at the same time, simply push the insert rod 35 horizontally towards the compression spring 36 until one end of the insert rod 35 is completely removed from the slot 34. At this time, the compression spring 36 is compressed, and the connection between the column 31 and the stirring shaft 2 can be disconnected. Then, the hand crank 37 is turned to drive the column 31 to rotate. The column 31 will then drive the first bevel gear 29 to rotate in the central groove 28. The first bevel gear 29 will then drive each rotating column 26 to rotate in the circular groove 25 through the meshing second bevel gears 30. The rotating column 26 will then drive the second baffle 27 to rotate along the rotation axis of the rotating column 26 in the circular groove 25 until the horizontal second baffle 27 is rotated 90 degrees to make it vertical. At this time, the gap between the stirring plate 3 and the inner wall of the washing tank 1 can be reduced by the vertical second baffle 27, which is simple and convenient to use.

[0056] like Figure 4Each horizontally positioned second baffle 27 has several auxiliary stirring rods 32 at its top and bottom. The purpose of this arrangement is that when the horizontal second baffle 27 rotates along the rotation axis of the stirring shaft 2, the liquid in the water washing tank 1 can be further stirred by the auxiliary stirring rods 32 on the second baffle 27. When the second baffle 27 is rotated to a vertical position, the auxiliary stirring rods 32 are located on both sides of the second baffle 27, making it simple and convenient to use.

[0057] like Figure 1 An observation window 38 is provided on one side of the outer wall of the washing vessel 1. The purpose of this setting is to facilitate the observation of the settling status of the liquid in the washing vessel 1 through the observation window 38, which is simple and convenient to use.

[0058] Example 2: A method of using a production apparatus for p-tert-butylcyclohexyl acetate, comprising Example 1, wherein by turning on the first motor 6, the rotating shaft of the first motor 6 drives the drive gear 7 to rotate, and the drive gear 7 drives the stirring shaft 2 to rotate through the driven gear 4 therein. At this time, the liquid in the washing tank 1 can be stirred by the stirring plates 3 on the stirring shaft 2. When the stirring is completed, the first motor 6 stops working, so that the stirring shaft 2 stops rotating. Then, the gap between the stirring plates 3 and the inner wall of the washing tank 1 is reduced by the sealing component. At this time, the liquid in the washing tank 1 can be separated by the stirring plates 3 and the sealing component, thereby reducing the occurrence of liquid continuing to flow after stirring stops and reducing the subsequent settling and stratification time.

[0059] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An apparatus for producing p-tert-butylcyclohexyl acetate, characterized in that, The apparatus includes a washing tank (1) and a stirring shaft (2) rotatably connected to the top of the washing tank (1). Several stirring plates (3) are vertically mounted on the stirring shaft (2), and each stirring plate (3) is evenly distributed along the circumference of the stirring shaft (2). The washing tank (1) is provided with a sealing component to reduce the gap between each stirring plate (3) and the inner wall of the washing tank (1). The top of the stirring shaft (2) passes through the washing tank (1) and is located outside the washing tank (1). A positioning device is coaxially mounted on the stirring shaft (2). The driven gear (4) is located outside the washing tank (1). The washing tank (1) is equipped with a first motor (6) via a first bracket (5). One end of the rotating shaft of the first motor (6) is equipped with a drive gear (7) that meshes with the driven gear (4). When the stirring shaft (2) rotates, the sealing member follows the stirring shaft (2) and rotates along the rotation axis of the stirring shaft (2). The top of the washing tank (1) is equipped with a feed pipe (8), and the bottom of the washing tank (1) is equipped with a discharge pipe (9) with a valve. The closure includes a rotating ring (10) sleeved on the stirring shaft (2) and several first baffles (12) set at the bottom of the rotating ring (10). Each stirring plate (3) is located below the rotating ring (10). Each first baffle (12) corresponds to each stirring plate (3). The bottom end of the first baffle (12) is located between one side of the stirring plate (3) and the inner wall of the washing tank (1). A driving rod (13) is vertically provided above one side of the stirring shaft (2). A driving groove (14) is provided on the inner wall of the rotating ring (10) for one end of the driving rod to pass through vertically. A pushing member is provided on the washing tank (1) for pushing the rotating ring (10) to move vertically up and down. The pusher includes an annular groove (15) coaxially disposed at the top of the rotating ring (10) and a slider (16) slidably connected in the annular groove (15). The top of the slider (16) is vertically provided with a screw (17). The top of the washing tank (1) is provided with a groove (18) corresponding to the screw (17). The top of the screw (17) extends vertically to the outside of the washing tank (1) through the groove (18). A threaded cylinder (19) located outside the washing tank (1) is threadedly connected to the screw (17), and the bottom end of the threaded cylinder (19) is rotatably connected to the top of the washing tank (1). The outer wall of the threaded cylinder (19) is coaxially provided with a first gear (20). The top of the washing tank (1) is provided with a second motor (22) through a second bracket (21), and one end of the rotating shaft of the second motor (22) is provided with a second gear (23) that meshes with the first gear (20). Alternatively, the enclosure includes several circular grooves (25) disposed below the side wall of the stirring shaft (2), and each circular groove (25) is evenly distributed along the circumference of the stirring shaft (2). Each circular groove (25) is rotatably connected to a rotating column (26), and each rotating column (26) is horizontally provided with a second baffle (27) located outside the circular groove (25). Each second baffle (27) is located below the stirring plate (3), and each second baffle (27) corresponds to each stirring plate (3). When the stirring shaft (2) stops rotating, the stirring shaft (2) is provided with a driving member for simultaneously driving each rotating column (26) to rotate in the circular groove (25). The driving component includes a central groove (28) coaxially disposed at the top of the stirring shaft (2), and each of the circular grooves (25) is connected to the central groove (28). A first bevel gear (29) is rotatably connected to the bottom of the central groove (28). Each of the rotating columns (26) is coaxially provided with a second bevel gear (30) located in the central groove (28) and meshing with the first bevel gear (29). A column (31) is vertically provided at the top of the first bevel gear (29), and the top of the column (31) is flush with the top of the stirring shaft (2). When the stirring shaft (2) rotates, a connecting component is provided on the stirring shaft (2) to drive the column (31) to rotate with the stirring shaft (2).

2. The apparatus for producing p-tert-butylcyclohexyl acetate as described in claim 1, characterized in that, The top of the rotating ring (10) is provided with several connecting grooves (24), and each connecting groove (24) is located on the inner and outer sides of the annular groove (15).

3. The apparatus for producing p-tert-butylcyclohexyl acetate as described in claim 1, characterized in that, Each of the horizontally arranged second baffles (27) is provided with several auxiliary stirring rods (32) at its top and bottom.

4. The apparatus for producing p-tert-butylcyclohexyl acetate as described in claim 1, characterized in that, The connector includes a placement groove (33) located at the top of the column (31) and connected to one side of the column (31). The top of the stirring shaft (2) is provided with several slots (34), and each slot (34) is evenly distributed along the circumference of the stirring shaft (2) and is connected to the central groove (28). A rod (35) is horizontally slidably connected in the placement groove (33), and one end of the rod (35) extends to the outside of the placement groove (33) and is horizontally inserted into one of the slots (34). A compression spring (36) is provided at one end of the rod (35) located in the placement groove (33), and the end of the compression spring (36) away from the rod (35) is fixedly connected to one side wall of the placement groove (33). A hand crank (37) is provided at the top of the column (31).

5. The apparatus for producing p-tert-butylcyclohexyl acetate as described in claim 1, characterized in that, An observation window (38) is provided on one side of the outer wall of the washing tank (1).

6. A method of using an apparatus for producing p-tert-butylcyclohexyl acetate according to any one of claims 1-5, characterized in that, By turning on the first motor (6), the rotating shaft of the first motor (6) drives the drive gear (7) to rotate. The drive gear (7) drives the stirring shaft (2) to rotate through the driven gear (4) inside it. At this time, the liquid in the washing tank (1) can be stirred by the stirring plates (3) on the stirring shaft (2). When the stirring is completed, the first motor (6) stops working, so that the stirring shaft (2) stops rotating. Then, the gap between the stirring plates (3) and the inner wall of the washing tank (1) is reduced by the sealing component. At this time, the liquid in the washing tank (1) can be separated by the stirring plates (3) and the sealing component.

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