A continuous closed loop reaction apparatus for the preparation of 2-pentylanthraquinone and methods of use thereof

Abstract

This invention belongs to the technical field of 2-pentylanthraquinone production equipment, specifically a continuous closed-loop reaction device for preparing 2-pentylanthraquinone and its usage method. Addressing the problems of low preparation efficiency, long preparation time, high labor intensity for employees, and air pollution caused by released gases in existing technologies, the following solution is proposed: a workbench, with a gas conversion box rotatably connected to the top of the workbench, a rotating disk fixedly connected to the top of the gas conversion box, multiple connecting plates fixedly connected to the outer wall of the rotating disk, and gaskets fixedly connected to the top of the connecting plates. In this invention, the cooperation of a first magnet and a second magnet can drive the rotating shaft, a first slide rod, and a second slide rod to move up and down, thereby automatically completing stirring, depressurization, gas collection, and mixed liquid collection operations without manual operation, reducing the labor intensity of workers. Furthermore, multiple closed-loop reaction vessels react sequentially, improving the preparation efficiency of the mixed liquid.

Description

Technical Field

[0001] This invention relates to the technical field of 2-pentylanthraquinone production equipment, and more particularly to a continuous closed-loop reaction apparatus for the preparation of 2-pentylanthraquinone and its method of use. Background Technology

[0002] With the development of industries such as caprolactam and propylene oxide, the demand for H2O2, as a green oxidant, is gradually increasing. The anthraquinone process is currently the main method for industrial production of hydrogen peroxide. Traditional anthraquinone processes generally use ethylanthraquinone as the working fluid carrier. However, 2-ethylanthraquinone has low solubility in the working fluid, which can easily lead to over-hydrogenation and the generation of more degradation products in order to produce high-hydrogen-efficiency hydrogen peroxide, making it unusable for recycling. 2-Pentylanthraquinone, as a new working fluid carrier, has high solubility, can produce high-hydrogen-efficiency hydrogen peroxide, and produces fewer degradation products. However, since there are no domestic manufacturers of 2-pentylanthraquinone, it needs to be imported, and its price is much higher than that of 2-ethylanthraquinone. This limits the widespread use of 2-pentylanthraquinone as a working fluid carrier in domestic hydrogen peroxide production. Literature review reveals that the production of 2-pentylanthraquinone generally employs the traditional Friedel-Crafts process. This process mainly consists of three steps: first, the synthesis of pentylbenzene; second, acylation to synthesize 2-(4-pentylbenzoyl)benzoic acid; and finally, the synthesis of 2-pentylanthraquinone through a dehydration and ring-closure process in the presence of fuming sulfuric acid or concentrated sulfuric acid. This traditional process consumes large amounts of concentrated sulfuric acid, involves numerous reaction steps, pollutes the environment, and has relatively high production costs, making it unsuitable for the green chemical production requirements of 2-pentylanthraquinone. Therefore, there is an urgent need to develop a new green production process for 2-pentylanthraquinone.

[0003] For example, the invention announced in CN107602368B discloses a method for preparing 2-pentylanthraquinone:

[0004] Step 1: In a high-pressure reactor, add 100g anthracene, 50g isopentene, and 0.5g Mg-MWW molecular sieve, then add 150ml of solvent. After sealing the reactor, replace the air in the reactor with nitrogen gas, and heat the reactor to the reaction temperature of 200℃. Then, purge the reactor with nitrogen gas to a reaction pressure of 2.5MPa. Under the reaction temperature and pressure, stir the reaction. During the reaction, continuously supply nitrogen gas and maintain a stable reaction pressure. Separation of alkylation products: After the alkylation reaction is completed, remove the reactor from the heating furnace, cool it to room temperature, reduce the pressure inside the reactor to atmospheric pressure, open the reactor lid, remove the mixture, and perform vacuum distillation on the mixture to separate the catalyst, the product 2-pentylanthracene, and the unreacted raw material anthracene; 2-pentylanthracene is obtained.

[0005] Step 2: The 2-pentylanthraquinone obtained in Step 1 was mixed with a solvent to form a reaction solution with a concentration of 5 g / L. 20 mL of this reaction solution was placed in a reaction vessel. The solvent was mesitylene. 0.5 g of a 0.25MnO2 / 0.1MgO / γ-Al2O3 catalyst was added. The reaction was carried out at atmospheric pressure, temperature T = 60℃, air flow rate 40 mL / min, and reaction time 10 min. The yield of 2-pentylanthraquinone was then detected and calculated using an Agilent 1260 liquid chromatograph. The detected liquid chromatogram is shown below. Figure 3 As shown, the yield of 2-pentylanthraquinone was 8%.

[0006] However, there are still some shortcomings in the preparation process of the existing technology:

[0007] 1. In the existing technology, when preparing the premix of 2-pentylanthraquinone, the closed-loop reactor needs to be cooled and the pressure reduced to atmospheric pressure before the mixture can be extracted. The preparation efficiency of the mixture is too low and the preparation time is too long.

[0008] 2. During the preparation process, staff need to constantly monitor the status of the closed-loop reactor and operate it manually. Therefore, the labor intensity of employees is high. In addition, when the pressure drops to atmospheric pressure, the released gas can easily pollute the air and affect the health of employees.

[0009] To address the above-mentioned problems, this invention proposes a continuous closed-loop reaction apparatus for the preparation of 2-pentylanthraquinone and its method of use. Summary of the Invention

[0010] This invention provides a continuous closed-loop reaction apparatus and its method for preparing 2-pentylanthraquinone, which solves the shortcomings of the prior art, such as low preparation efficiency, long preparation time, high labor intensity for employees, and easy air pollution caused by the released gas.

[0011] This invention provides the following technical solution:

[0012] A continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone includes: a workbench, a gas conversion box rotatably connected to the top of the workbench, a rotating disk fixedly connected to the top of the gas conversion box, a plurality of connecting plates fixedly connected to the outer wall of the rotating disk, a gasket fixedly connected to the top of the connecting plates, and a closed-loop reaction vessel fixedly connected to the top of the gasket.

[0013] A stirring rod is rotatably inserted inside the closed-loop reactor. The bottom end of the stirring rod extends to the bottom of the connecting plate and is fixedly connected to a first fixed plate. Multiple first magnets are fixedly connected to the bottom of the first fixed plate.

[0014] A stirring structure is provided inside the workbench for stirring the raw materials in the closed-loop reactor and accelerating the reaction of the raw materials. The stirring structure includes a first groove provided inside the workbench, and a rotating shaft passes through the bottom of the first groove.

[0015] An exhaust structure, installed inside the workbench, is used to reduce the gas pressure inside the closed-loop reactor to atmospheric pressure and collect the gas. The exhaust structure includes a third groove installed inside the workbench, and a first slide rod slides through the bottom inner wall of the third groove.

[0016] A collection structure is provided inside the workbench for collecting the mixed solution generated after the reaction in the closed-loop reactor. The collection structure includes a fourth groove provided inside the workbench, and a second sliding rod slides through the bottom inner wall of the fourth groove.

[0017] The top ends of the rotating shaft, the first slide rod, and the second slide rod are all fixedly connected to a second fixing plate. The top of the second fixing plate is fixedly connected to a plurality of second magnets, and the second magnets cooperate with the first magnets.

[0018] In one possible design, the stirring structure further includes a drive motor fixedly connected to the bottom of the workbench via a frame. The output shaft of the drive motor is fixedly connected to a round rod, the top end of which slides into the rotating shaft. The closed-loop reactor to be reacted rotates to above the first groove, and the first and second fixed disks are magnetically attracted by the first and second magnets. The drive motor drives the stirring rod to rotate via the round rod and the second fixed disk, stirring the raw materials in the closed-loop reactor, accelerating the reaction, and improving the reaction efficiency.

[0019] In one possible design, the exhaust structure further includes a connecting rod rotatably connected to the bottom of the worktable via a base. A first pull rope is provided on one side of the top of the connecting rod, and the top end of the first pull rope is fixedly connected to the bottom end of a first sliding rod. A vertical rod slides through the worktable, and the bottom end of the vertical rod passes through the connecting rod. A retaining ring that mates with the connecting rod is fixedly fitted onto the outer wall of the vertical rod. A bracket is fixedly connected to the top of the worktable, and a cylinder is fixedly connected to the top of the bracket. The output shaft of the cylinder passes through the bracket and is fixedly connected to a heating furnace. A circular ring that mates with a washer ring is fixedly connected to the inner wall of the heating furnace. A sliding groove is provided inside the bracket, and a sliding plate is slidably connected within the sliding groove. The bottom of the slide plate is fixedly connected to multiple first springs, and the bottom ends of the first springs are fixedly connected to the bottom inner wall of the slide groove. The top of the slide plate is fixedly connected to an L-shaped tube for collecting gas in the closed-loop reactor. The bottom end of the L-shaped tube is fixedly connected to a square tube. The top end of the vertical rod is fixedly connected to the L-shaped tube. The cooperation of the second magnet and the first magnet drives the first slide rod to move upward. Through the lever principle, the connecting rod drives the vertical rod to move downward. The vertical rod pulls the L-shaped tube and the square tube downward. The square tube pushes the stop rod downward. At this time, the gas in the closed-loop reactor enters the square tube and the L-shaped tube through the round hole, the exhaust chamber and the through pipe, completing the collection of gas. The pressure in the closed-loop reactor returns to normal pressure.

[0020] In one possible design, the collection structure further includes a horizontal plate slidably connected to the worktable via a round rod. The horizontal plate is fixedly connected to the bottom end of the second sliding rod. A collection tube slides through the horizontal plate, and the top end of the collection tube slides through the worktable. A discharge pipe that cooperates with the collection tube is fixedly passed through the bottom of the closed-loop reactor. When the closed-loop reactor moves above the fourth groove, the magnetic attraction between the second fixed plate and the first fixed plate drives the second sliding rod and the horizontal plate to move upward, and the discharge pipe is just inserted into the collection tube. Activating the valve on the outer wall of the discharge pipe can automatically collect the reaction mixture in the closed-loop reactor.

[0021] In one possible design, the top of the workbench has a second groove, and a rotating shaft rotatably passes through the bottom inner wall of the second groove. A fan blade located in the second groove is fixedly connected to the top of the rotating shaft. Two synchronous pulleys are rotatably connected to the bottom of the workbench, and the two synchronous pulleys are connected by a synchronous belt drive. The top of the rotating shaft slides through one of the synchronous pulleys, and the other synchronous pulley is fixedly sleeved on the outer wall of the rotating shaft. The rotating disk drives the closed-loop reactor to rotate above the second groove. Then, the heating furnace and the drive motor react the next closed-loop reactor. When the drive motor drives the rotating shaft to rotate, the drive motor drives the fan blade to rotate through the synchronous pulley and the synchronous belt. The fan blade cools the closed-loop reactor from bottom to top, accelerating the cooling of the closed-loop reactor and cooling it to room temperature. Then, when stirring the raw materials in the closed-loop reactor, the fan blade can drive the other closed-loop reactor to cool it.

[0022] In one possible design, the top of the workbench is provided with an exhaust port, and a stop rod that seals the exhaust port is slidably connected inside the exhaust port. The stop rod is provided with an exhaust chamber, and the outer wall of the stop rod is provided with multiple circular holes that communicate with the exhaust chamber. A through pipe that communicates with the exhaust chamber is fixedly passed through the inner part of the stop rod. A second spring that is fixedly connected to the top of the closed-loop reactor is sleeved on the outer wall of the stop rod, and the top end of the through pipe is fixedly connected to the outer wall of the stop rod. When the L-shaped tube and the square tube move down, the square tube pushes the stop rod down, and the circular hole moves down and extends into the exhaust port. At this time, the gas in the closed-loop reactor enters the square tube and the L-shaped tube through the circular hole, the exhaust chamber, and the through pipe, completing the gas collection. The pressure in the closed-loop reactor is restored to atmospheric pressure. The gas in the closed-loop reactor can be automatically discharged without manual operation, so that the gas pressure in the closed-loop reactor is restored to atmospheric pressure.

[0023] In one possible design, a sealing ring that mates with a through pipe is fixedly connected inside the square tube. Two rotating rods are rotatably connected inside the square tube. Two sealing plates for sealing the sealing ring are fixedly sleeved on the outer wall of the rotating rods. Two torsion springs are sleeved on the outer wall of the rotating rods. The ends of the two torsion springs that are close to each other are fixedly connected to the sealing plates, and the ends of the two torsion springs that are far from each other are fixedly connected to the inner walls of the two sides of the square tube. The torsion springs can cause the sealing plates to seal the sealing ring, preventing the gas in the L-shaped tube and the square tube from leaking back to the outside. When the square tube moves down and squeezes the stop bar, the top of the through pipe can push the sealing plate to rotate, releasing the seal on the sealing ring, thus facilitating the collection of gas in the closed-loop reactor by the L-shaped tube and the square tube in the later stage.

[0024] In one possible design, a pressure sensor is fixedly connected to one side of the closed-loop reactor, and the probe of the pressure sensor extends into the closed-loop reactor. A protective cover for protecting the pressure sensor is fixedly connected to one side of the closed-loop reactor. A gas injection pipe passes through the workbench, and the top end of the gas injection pipe extends rotatably into the gas conversion box. An air inlet pipe is fixedly connected to one side of the closed-loop reactor, and one end of the air inlet pipe extends into the gas conversion box. A solenoid valve is provided on the outer wall of the air inlet pipe.

[0025] In one possible design, the top of the workbench has two rectangular slots, the top of which is slidably connected to a movable plate. The bottom of the movable plate has two sliding heat-insulating plates, each with a slot. The top of the movable plate is slidably connected to a trapezoidal pin that engages with the slot. The bottom end of the trapezoidal pin is fixedly connected to a third spring, and the bottom end of the third spring is fixedly connected to the inner wall of the bottom of the movable plate. A tension spring is fixedly connected to the side of the movable plate closest to the second groove, and the other end of the tension spring is fixedly connected to the inner wall of one side of the rectangular slot. Second pull ropes are provided on the sides of the two movable plates that are far apart from each other. The ends of the two second pull ropes that are close to each other extend into the second groove and are fixedly connected to the same... A plastic plate has a third magnet fixedly embedded in its top, which cooperates with the first magnet. When the closed-loop reactor moves above the second groove after the reaction, the trapezoidal pin is engaged in the sliding insulation plate under the elastic force of the third spring. The two sliding insulation plates are closed to prevent heat loss when the heating furnace heats the closed-loop reactor. Then, the wind force generated by the rotating shaft driving the fan blades pushes the plastic plate upward. The third magnet and the first magnet generate magnetic attraction, and the plastic plate can move upward and fit against the first fixed plate. The plastic plate is pulled to both sides by the second pull rope, releasing the sliding insulation plate from the connecting plate, so that the wind force generated by the fan blades can effectively and quickly cool the closed-loop reactor.

[0026] The method of using the continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone includes the following steps:

[0027] S1. The rotating disk and connecting plate rotate to the top of the first groove. The first fixed disk and the second fixed disk are magnetically attracted by the first magnet and the second magnet. The driving motor drives the stirring rod to rotate, stirring the raw materials in the closed-loop reactor and accelerating the reaction.

[0028] S2. After the reaction is completed, the closed-loop reactor rotates to the top of the second groove, and the drive motor drives the fan blades to rotate through the synchronous pulley and synchronous belt to accelerate the cooling of the closed-loop reactor.

[0029] S3. The closed-loop reactor moves to the top of the third groove. The cooperation of the second magnet and the first magnet drives the vertical rod and the square tube to move down. The square tube pushes the baffle rod down. At this time, the gas in the closed-loop reactor enters the L-shaped tube through the round hole, completing the collection of the gas. The pressure in the closed-loop reactor returns to normal pressure.

[0030] S4. When the square tube is pressed downwards, the stop bar is pushed by the through pipe, and the sealing plate releases the sealing ring, allowing gas to enter the L-shaped tube through the through pipe.

[0031] S5. The closed-loop reactor moves to the top of the fourth groove. The magnetic attraction between the second fixed plate and the first fixed plate drives the second slide bar and the horizontal plate to move up. The discharge pipe is just inserted into the collection pipe, which can automatically collect the mixed liquid after the reaction in the closed-loop reactor.

[0032] S6. When the closed-loop reactor moves above the second groove after the reaction, the wind force generated by the fan blades pushes the plastic plate upward. The plastic plate pulls the sliding insulation plate to both sides through the second pull rope, releasing the sliding insulation plate from the connecting plate, so that the wind force generated by the fan blades can effectively and quickly cool the closed-loop reactor.

[0033] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the invention.

[0034] In this invention, a first pull rope is provided on one side of the top of the connecting rod, and the top of the first pull rope is fixedly connected to the bottom of the first sliding rod. A retaining ring that cooperates with the connecting rod is fixedly sleeved on the outer wall of the vertical rod. The top of the vertical rod is fixedly connected to the L-shaped tube, and a square tube is fixedly connected to the bottom of the L-shaped tube. The cooperation between the second magnet and the first magnet drives the first sliding rod to move upward, and the connecting rod drives the vertical rod, the square tube, and the retaining rod to move downward. At this time, the gas in the closed-loop reactor enters the L-shaped tube through the round hole, completing the collection of the gas. The pressure in the closed-loop reactor is restored to normal pressure. The depressurization work in the closed-loop reactor can be completed directly without manual operation, and the gas in the closed-loop reactor can also be recovered.

[0035] In this invention, a sealing ring that cooperates with the through pipe is fixedly connected inside the square tube, and two rotating rods are rotatably connected inside the square tube. Two sealing plates are fixedly sleeved on the outer wall of the rotating rods. The sealing plates can close the sealing ring through the action of the torsion spring, preventing the gas in the L-shaped tube and the square tube from leaking back to the outside. When the square tube moves down and squeezes the stop bar, the top of the through pipe can push the sealing plate to rotate, releasing the seal on the sealing ring, thus facilitating the collection of gas in the closed-loop reactor by the L-shaped tube and the square tube in the later stage.

[0036] In this invention, the bottom end of the horizontal plate is fixedly connected to the bottom end of the second sliding rod, a collection tube slides through the horizontal plate, and the top end of the collection tube slides through the worktable. A discharge pipe that cooperates with the collection tube is fixedly passed through the bottom of the closed-loop reactor. When the closed-loop reactor moves above the fourth groove, the magnetic attraction between the second fixed plate and the first fixed plate drives the second sliding rod and the horizontal plate to move upward, and the discharge pipe is inserted into the collection tube. Through the cooperation of the second fixed plate and the first magnet, the mixed liquid after reaction in the closed-loop reactor can be automatically collected without manual labor, reducing the labor intensity of the workers.

[0037] In this invention, a movable plate is slidably connected to the top of the rectangular groove, and a trapezoidal pin is slidably connected to the top of the movable plate, engaging with a sliding insulation plate. A second pull rope is provided on each of the two movable plates on opposite sides, and the same plastic plate is fixedly connected to the ends of the two second pull ropes that are close to each other. The trapezoidal pin engages with the sliding insulation plate, and the airflow generated by the rotating shaft driving the fan blades pushes the plastic plate upwards. A third magnet and a first magnet generate magnetic attraction, and the plastic plate pulls the movable plate and the sliding insulation plate to both sides via the second pull ropes, releasing the sliding insulation plate from the connecting plate, allowing the airflow generated by the fan blades to effectively and quickly cool the closed-loop reactor.

[0038] In this invention, the cooperation of the first magnet and the second magnet can drive the rotating shaft, the first slide rod and the second slide rod to move up and down respectively, thereby automatically completing the stirring, depressurization, gas collection and mixture collection operations without manual operation, reducing the workload of the staff. In addition, multiple closed-loop reactors react in sequence, improving the preparation efficiency of the mixture. Attached Figure Description

[0039] Figure 1 This is a first-view three-dimensional structural diagram of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in an embodiment of the present invention.

[0040] Figure 2 This is a second-view three-dimensional structural schematic diagram of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in an embodiment of the present invention.

[0041] Figure 3 This is a first-view three-dimensional cross-sectional structural diagram of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in an embodiment of the present invention.

[0042] Figure 4 This is a three-dimensional structural schematic diagram of the workbench of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in an embodiment of the present invention;

[0043] Figure 5 This is a three-dimensional structural diagram of the second fixed disk and the first fixed disk of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in an embodiment of the present invention.

[0044] Figure 6 This is a three-dimensional exploded structural diagram of the connecting plate and the closed-loop reaction vessel of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in an embodiment of the present invention;

[0045] Figure 7 This is a three-dimensional cross-sectional view of the closed-loop reactor and heating furnace of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in an embodiment of the present invention.

[0046] Figure 8 This is a partial three-dimensional cross-sectional view of a support structure for a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in an embodiment of the present invention;

[0047] Figure 9 This is a three-dimensional structural diagram of the first slide bar, connecting bar, and vertical bar of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in an embodiment of the present invention.

[0048] Figure 10 This is a three-dimensional cross-sectional view of the baffle of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in an embodiment of the present invention;

[0049] Figure 11 This is a partial front view cross-sectional view of the fan blades and through-tubes of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in an embodiment of the present invention;

[0050] Figure 12 This is a schematic diagram of a three-dimensional cross-sectional structure from a second perspective of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in an embodiment of the present invention.

[0051] Figure 13 This is a magnified schematic diagram of section A of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in Embodiment 2 of the present invention;

[0052] Figure 14 This is a partial side cross-sectional view of the workbench and connecting plate of a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone provided in Embodiment 2 of the present invention.

[0053] Figure label:

[0054] 1. Workbench; 2. Gas conversion box; 3. Rotating disc; 4. Gas injection pipe; 5. Connecting plate; 6. Gasket ring; 7. Closed-loop reactor; 8. Stirring rod; 9. First fixed disc; 10. First magnet; 11. Discharge pipe; 12. Inlet pipe; 13. Solenoid valve; 14. Cylinder; 15. Heating furnace; 16. First groove; 17. Second groove; 18. Third groove; 19. Fourth groove; 20. Drive motor; 21. Rotating shaft; 22. Round rod; 23. Second fixed disc; 24. Second magnet; 25. Rotating shaft; 26. Fan blade; 27. First slide rod; 28. Connecting rod; 29. ​​First pull rope; 30. Vertical rod; 31. 32. Retaining ring; 33. Slide groove; 34. Slide plate; 35. First spring; 36. L-shaped tube; 37. Square tube; 38. Exhaust port; 39. Stop bar; 40. Exhaust chamber; 41. Round hole; 42. Torsion spring; 43. Second spring; 44. Through pipe; 45. Sealing ring; 46. Rotating rod; 47. Sealing plate; 48. Second slide bar; 49. Horizontal plate; 50. Collection pipe; 51. Rectangular groove; 52. Moving plate; 53. Tension spring; 54. Sliding insulation plate; 55. Trapezoidal pin; 56. Third spring; 57. Second pull rope; 58. Plastic plate; 59. Third magnet; 60. Bracket; 61. Pressure sensor; 62. Circular ring. Detailed Implementation

[0055] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0056] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the devices are connected to each other and their relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of the present invention, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0057] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0058] In this embodiment of the invention, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0059] References to "one embodiment" or "some embodiments" as used in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the invention. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless otherwise specifically emphasized.

[0060] Example 1

[0061] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4This embodiment provides a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone, comprising: a workbench 1; a gas conversion box 2 rotatably connected to the top of the workbench 1; a rotating disk 3 bolted to the top of the gas conversion box 2; multiple connecting plates 5 bolted to the outer wall of the rotating disk 3; a gasket 6 bolted to the top of the connecting plates 5; and a closed-loop reaction vessel 7 bolted to the top of the gasket 6; a stirring rod 8 rotatably passing through the closed-loop reaction vessel 7; the bottom end of the stirring rod 8 extending below the connecting plates 5 and bolted to a first fixed disk 9; and multiple first magnets 10 bolted to the bottom of the first fixed disk 9; and a stirring structure disposed within the workbench 1 for stirring the raw materials within the closed-loop reaction vessel 7 to accelerate the reaction. The stirring structure includes components disposed within the workbench 1. The first groove 16 is located inside the workbench 1, with a rotating shaft 21 passing through its bottom. An exhaust structure, located inside the workbench 1, is used to reduce the gas pressure inside the closed-loop reactor 7 to atmospheric pressure and collect the gas. The exhaust structure includes a third groove 18 located inside the workbench 1, with a first sliding rod 27 slidingly passing through its bottom inner wall. A collection structure, located inside the workbench 1, is used to collect the mixed solution generated after the reaction inside the closed-loop reactor 7. The collection structure includes a fourth groove 19 located inside the workbench 1, with a second sliding rod 47 slidingly passing through its bottom inner wall. A second fixed disk 23 is fixedly connected to the top of the rotating shaft 21, the first sliding rod 27, and the second sliding rod 47. Multiple second magnets 24 are fixedly connected to the top of the second fixed disk 23, and the second magnets 24 cooperate with the first magnet 10.

[0062] Reference Figure 5 and Figure 7 The stirring structure also includes a drive motor 20 fixedly connected to the bottom of the workbench 1 via a frame. The output shaft of the drive motor 20 is fixedly connected to a round rod 22 via a coupling. The top end of the round rod 22 slides into the rotating shaft 21. The closed-loop reactor 7 to be reacted rotates to the top of the first groove 16. The first fixed plate 9 and the second fixed plate 23 are magnetically attracted by the first magnet 10 and the second magnet 24. The drive motor 20 drives the stirring rod 8 to rotate via the round rod 22 and the second fixed plate 23, stirring the raw materials in the closed-loop reactor 7, accelerating the reaction and improving the reaction efficiency.

[0063] Reference Figure 8 and Figure 9The exhaust structure also includes a connecting rod 28 rotatably connected to the bottom of the workbench 1 via a base. A first pull rope 29 is provided on one side of the top of the connecting rod 28, and the top of the first pull rope 29 is fixedly connected to the bottom of the first slide rod 27. A vertical rod 30 slides through the workbench 1, and the bottom of the vertical rod 30 passes through the connecting rod 28. A retaining ring 31 that cooperates with the connecting rod 28 is fixedly fitted on the outer wall of the vertical rod 30 by bolts. A bracket 59 is fixedly connected to the top of the workbench 1 by bolts. A cylinder 14 is fixedly connected to the top of the bracket 59 by bolts. The output shaft of the cylinder 14 passes through the bracket 59 and is fixedly connected to a heating furnace 15 by bolts. A circular ring 61 that cooperates with a gasket 6 is fixedly connected to the inner wall of the heating furnace 15. A sliding groove 32 is provided in the bracket 59, and a sliding plate 33 is slidably connected in the sliding groove 32. Multiple first springs 34 are fixedly connected to the bottom of the container, and the bottom end of the first springs 34 is fixedly connected to the bottom inner wall of the slide groove 32. An L-shaped tube 35 for collecting gas in the closed-loop reactor 7 is fixedly connected to the top of the slide plate 33. A square tube 36 is fixedly connected to the bottom end of the L-shaped tube 35. The top end of the vertical rod 30 is fixedly connected to the L-shaped tube 35. The cooperation between the second magnet 24 and the first magnet 10 drives the first slide rod 27 to move upward. Through the lever principle connecting rod 28, the vertical rod 30 moves downward. The vertical rod 30 pulls the L-shaped tube 35 and the square tube 36 downward. The square tube 36 pushes the stop rod 38 downward. At this time, the gas in the closed-loop reactor 7 enters the square tube 36 and the L-shaped tube 35 through the round hole 40, the exhaust chamber 39 and the through pipe 43, completing the collection of gas. The pressure in the closed-loop reactor 7 returns to normal pressure.

[0064] Reference Figure 12 and Figure 13 The collection structure also includes a horizontal plate 48 that is slidably connected to the workbench 1 via a round rod 22. The bottom end of the horizontal plate 48 is fixedly connected to the second slide rod 47 by bolts. A collection tube 49 slides through the horizontal plate 48, and the top end of the collection tube 49 slides through the workbench 1. A discharge pipe 11 that cooperates with the collection tube 49 is fixedly inserted through the bottom of the closed-loop reactor 7. When the closed-loop reactor 7 moves above the fourth groove 19, the magnetic attraction between the second fixed plate 23 and the first fixed plate 9 drives the second slide rod 47 and the horizontal plate 48 to move upward. The discharge pipe 11 is just inserted into the collection tube 49. The valve on the outer wall of the discharge pipe 11 is activated, which can automatically collect the mixed liquid after reaction in the closed-loop reactor 7.

[0065] Reference Figure 4 and Figure 5The top of the workbench 1 is provided with a second groove 17. A rotating shaft 25 is rotatably passed through the bottom inner wall of the second groove 17. The top of the rotating shaft 25 is fixedly connected to a fan blade 26 located in the second groove 17 by bolts. Two synchronous pulleys are rotatably connected to the bottom of the workbench 1. The two synchronous pulleys are connected by a synchronous belt drive. The top of the rotating shaft 21 slides through one of the synchronous pulleys, and the other synchronous pulley is fixedly sleeved on the outer wall of the rotating shaft 25. The rotating disk 3 drives the closed-loop reactor 7 to rotate above the second groove 17. Then, the heating furnace 15 and the drive motor 20 react the next closed-loop reactor 7. When the drive motor 20 drives the rotating shaft 21 to rotate, the drive motor 20 drives the fan blade 26 to rotate through the synchronous pulley and the synchronous belt. The fan blade 26 cools the closed-loop reactor 7 from the bottom up, accelerates the cooling of the closed-loop reactor 7, and cools the closed-loop reactor 7 to room temperature. Then, when stirring the raw materials in the closed-loop reactor 7, the fan blade 26 can drive the other closed-loop reactor 7 to cool it.

[0066] Reference Figure 10 and Figure 11 The top of the workbench 1 is provided with an exhaust port 37. A stop rod 38 that seals the exhaust port 37 is slidably connected inside the exhaust port 37. An exhaust chamber 39 is provided inside the stop rod 38. The outer wall of the stop rod 38 is provided with multiple round holes 40 that communicate with the exhaust chamber 39. A through pipe 43 that communicates with the exhaust chamber 39 is fixedly passed through the inside of the stop rod 38. A second spring 42 that is fixedly connected to the top of the closed-loop reactor 7 is sleeved on the outer wall of the stop rod 38, and the top end of the through pipe 43 is fixedly connected to the outer wall of the stop rod 38. When the L-shaped tube 35 and the square tube 36 move downwards, the square tube 36 pushes the stop lever 38 downwards, and the round hole 40 moves downwards and extends into the exhaust hole 37. At this time, the gas in the closed-loop reactor 7 enters the square tube 36 and the L-shaped tube 35 through the round hole 40, the exhaust chamber 39 and the through pipe 43, completing the collection of gas. The pressure in the closed-loop reactor 7 is restored to normal pressure. The gas in the closed-loop reactor 7 can be automatically discharged without manual operation, so that the gas pressure in the closed-loop reactor 7 is restored to normal pressure.

[0067] Reference Figure 11A sealing ring 44 that cooperates with the through pipe 43 is fixedly connected inside the square tube 36. Two rotating rods 45 are rotatably connected inside the square tube 36. Two sealing plates 46 for sealing the sealing ring 44 are fixedly sleeved on the outer wall of the rotating rods 45. Two torsion springs 41 are sleeved on the outer wall of the rotating rods 45. The ends of the two torsion springs 41 that are close to each other are fixedly connected to the sealing plates 46, and the ends of the two torsion springs 41 that are far from each other are fixedly connected to the inner walls of the two sides of the square tube 36. The torsion springs 41 can make the sealing plates 46 seal the sealing ring 44, preventing the gas in the L-shaped tube 35 and the square tube 36 from leaking back to the outside. When the square tube 36 moves down to squeeze the stop bar 38, the top of the through pipe 43 can push the sealing plate 46 to rotate, releasing the seal on the sealing ring 44, thus facilitating the collection of gas in the closed-loop reactor 7 by the L-shaped tube 35 and the square tube 36 in the later stage.

[0068] Reference Figure 7 A pressure sensor 60 is bolted to one side of the closed-loop reactor 7, and the probe of the pressure sensor 60 extends into the closed-loop reactor 7. A protective cover for the pressure sensor 60 is bolted to one side of the closed-loop reactor 7. A gas injection pipe 4 passes through the workbench 1, and the top end of the gas injection pipe 4 extends rotatably into the gas conversion box 2. An air inlet pipe 12 is fixedly passed through one side of the closed-loop reactor 7, and one end of the air inlet pipe 12 extends into the gas conversion box 2. A solenoid valve 13 is provided on the outer wall of the air inlet pipe 12.

[0069] Example 2

[0070] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4This embodiment provides a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone, comprising: a workbench 1; a gas conversion box 2 rotatably connected to the top of the workbench 1; a rotating disk 3 bolted to the top of the gas conversion box 2; multiple connecting plates 5 bolted to the outer wall of the rotating disk 3; a gasket 6 bolted to the top of the connecting plates 5; and a closed-loop reaction vessel 7 bolted to the top of the gasket 6; a stirring rod 8 rotatably passing through the closed-loop reaction vessel 7; the bottom end of the stirring rod 8 extending below the connecting plates 5 and bolted to a first fixed disk 9; and multiple first magnets 10 bolted to the bottom of the first fixed disk 9; and a stirring structure disposed within the workbench 1 for stirring the raw materials within the closed-loop reaction vessel 7 to accelerate the reaction. The stirring structure includes components disposed within the workbench 1. The first groove 16 is located inside the workbench 1, with a rotating shaft 21 passing through its bottom. An exhaust structure, located inside the workbench 1, is used to reduce the gas pressure inside the closed-loop reactor 7 to atmospheric pressure and collect the gas. The exhaust structure includes a third groove 18 located inside the workbench 1, with a first sliding rod 27 slidingly passing through its bottom inner wall. A collection structure, located inside the workbench 1, is used to collect the mixed solution generated after the reaction inside the closed-loop reactor 7. The collection structure includes a fourth groove 19 located inside the workbench 1, with a second sliding rod 47 slidingly passing through its bottom inner wall. A second fixed disk 23 is fixedly connected to the top of the rotating shaft 21, the first sliding rod 27, and the second sliding rod 47. Multiple second magnets 24 are fixedly connected to the top of the second fixed disk 23, and the second magnets 24 cooperate with the first magnet 10.

[0071] Reference Figure 5 and Figure 7 The stirring structure also includes a drive motor 20 fixedly connected to the bottom of the workbench 1 via a frame. The output shaft of the drive motor 20 is fixedly connected to a round rod 22 via a coupling. The top end of the round rod 22 slides into the rotating shaft 21. The closed-loop reactor 7 to be reacted rotates to the top of the first groove 16. The first fixed plate 9 and the second fixed plate 23 are magnetically attracted by the first magnet 10 and the second magnet 24. The drive motor 20 drives the stirring rod 8 to rotate via the round rod 22 and the second fixed plate 23, stirring the raw materials in the closed-loop reactor 7, accelerating the reaction and improving the reaction efficiency.

[0072] Reference Figure 8 and Figure 9The exhaust structure also includes a connecting rod 28 rotatably connected to the bottom of the workbench 1 via a base. A first pull rope 29 is provided on one side of the top of the connecting rod 28, and the top of the first pull rope 29 is fixedly connected to the bottom of the first slide rod 27. A vertical rod 30 slides through the workbench 1, and the bottom of the vertical rod 30 passes through the connecting rod 28. A retaining ring 31 that cooperates with the connecting rod 28 is fixedly fitted on the outer wall of the vertical rod 30 by bolts. A bracket 59 is fixedly connected to the top of the workbench 1 by bolts. A cylinder 14 is fixedly connected to the top of the bracket 59 by bolts. The output shaft of the cylinder 14 passes through the bracket 59 and is fixedly connected to a heating furnace 15 by bolts. A circular ring 61 that cooperates with a gasket 6 is fixedly connected to the inner wall of the heating furnace 15. A sliding groove 32 is provided in the bracket 59, and a sliding plate 33 is slidably connected in the sliding groove 32. Multiple first springs 34 are fixedly connected to the bottom of the container, and the bottom end of the first springs 34 is fixedly connected to the bottom inner wall of the slide groove 32. An L-shaped tube 35 for collecting gas in the closed-loop reactor 7 is fixedly connected to the top of the slide plate 33. A square tube 36 is fixedly connected to the bottom end of the L-shaped tube 35. The top end of the vertical rod 30 is fixedly connected to the L-shaped tube 35. The cooperation between the second magnet 24 and the first magnet 10 drives the first slide rod 27 to move upward. Through the lever principle connecting rod 28, the vertical rod 30 moves downward. The vertical rod 30 pulls the L-shaped tube 35 and the square tube 36 downward. The square tube 36 pushes the stop rod 38 downward. At this time, the gas in the closed-loop reactor 7 enters the square tube 36 and the L-shaped tube 35 through the round hole 40, the exhaust chamber 39 and the through pipe 43, completing the collection of gas. The pressure in the closed-loop reactor 7 returns to normal pressure.

[0073] Reference Figure 12 and Figure 13 The collection structure also includes a horizontal plate 48 that is slidably connected to the workbench 1 via a round rod 22. The bottom end of the horizontal plate 48 is fixedly connected to the second slide rod 47 by bolts. A collection tube 49 slides through the horizontal plate 48, and the top end of the collection tube 49 slides through the workbench 1. A discharge pipe 11 that cooperates with the collection tube 49 is fixedly inserted through the bottom of the closed-loop reactor 7. When the closed-loop reactor 7 moves above the fourth groove 19, the magnetic attraction between the second fixed plate 23 and the first fixed plate 9 drives the second slide rod 47 and the horizontal plate 48 to move upward. The discharge pipe 11 is just inserted into the collection tube 49. The valve on the outer wall of the discharge pipe 11 is activated, which can automatically collect the mixed liquid after reaction in the closed-loop reactor 7.

[0074] Reference Figure 4 and Figure 5The top of the workbench 1 is provided with a second groove 17. A rotating shaft 25 is rotatably passed through the bottom inner wall of the second groove 17. The top of the rotating shaft 25 is fixedly connected to a fan blade 26 located in the second groove 17 by bolts. Two synchronous pulleys are rotatably connected to the bottom of the workbench 1. The two synchronous pulleys are connected by a synchronous belt drive. The top of the rotating shaft 21 slides through one of the synchronous pulleys, and the other synchronous pulley is fixedly sleeved on the outer wall of the rotating shaft 25. The rotating disk 3 drives the closed-loop reactor 7 to rotate above the second groove 17. Then, the heating furnace 15 and the drive motor 20 react the next closed-loop reactor 7. When the drive motor 20 drives the rotating shaft 21 to rotate, the drive motor 20 drives the fan blade 26 to rotate through the synchronous pulley and the synchronous belt. The fan blade 26 cools the closed-loop reactor 7 from the bottom up, accelerates the cooling of the closed-loop reactor 7, and cools the closed-loop reactor 7 to room temperature. Then, when stirring the raw materials in the closed-loop reactor 7, the fan blade 26 can drive the other closed-loop reactor 7 to cool it.

[0075] Reference Figure 10 and Figure 11 The top of the workbench 1 is provided with an exhaust port 37. A stop rod 38 that seals the exhaust port 37 is slidably connected inside the exhaust port 37. An exhaust chamber 39 is provided inside the stop rod 38. The outer wall of the stop rod 38 is provided with multiple round holes 40 that communicate with the exhaust chamber 39. A through pipe 43 that communicates with the exhaust chamber 39 is fixedly passed through the inside of the stop rod 38. A second spring 42 that is fixedly connected to the top of the closed-loop reactor 7 is sleeved on the outer wall of the stop rod 38, and the top end of the through pipe 43 is fixedly connected to the outer wall of the stop rod 38. When the L-shaped tube 35 and the square tube 36 move downwards, the square tube 36 pushes the stop lever 38 downwards, and the round hole 40 moves downwards and extends into the exhaust hole 37. At this time, the gas in the closed-loop reactor 7 enters the square tube 36 and the L-shaped tube 35 through the round hole 40, the exhaust chamber 39 and the through pipe 43, completing the collection of gas. The pressure in the closed-loop reactor 7 is restored to normal pressure. The gas in the closed-loop reactor 7 can be automatically discharged without manual operation, so that the gas pressure in the closed-loop reactor 7 is restored to normal pressure.

[0076] Reference Figure 11A sealing ring 44 that cooperates with the through pipe 43 is fixedly connected inside the square tube 36. Two rotating rods 45 are rotatably connected inside the square tube 36. Two sealing plates 46 for sealing the sealing ring 44 are fixedly sleeved on the outer wall of the rotating rods 45. Two torsion springs 41 are sleeved on the outer wall of the rotating rods 45. The ends of the two torsion springs 41 that are close to each other are fixedly connected to the sealing plates 46, and the ends of the two torsion springs 41 that are far from each other are fixedly connected to the inner walls of the two sides of the square tube 36. The torsion springs 41 can make the sealing plates 46 seal the sealing ring 44, preventing the gas in the L-shaped tube 35 and the square tube 36 from leaking back to the outside. When the square tube 36 moves down to squeeze the stop bar 38, the top of the through pipe 43 can push the sealing plate 46 to rotate, releasing the seal on the sealing ring 44, thus facilitating the collection of gas in the closed-loop reactor 7 by the L-shaped tube 35 and the square tube 36 in the later stage.

[0077] Reference Figure 7 A pressure sensor 60 is bolted to one side of the closed-loop reactor 7, and the probe of the pressure sensor 60 extends into the closed-loop reactor 7. A protective cover for the pressure sensor 60 is bolted to one side of the closed-loop reactor 7. A gas injection pipe 4 passes through the workbench 1, and the top end of the gas injection pipe 4 extends rotatably into the gas conversion box 2. An air inlet pipe 12 is fixedly passed through one side of the closed-loop reactor 7, and one end of the air inlet pipe 12 extends into the gas conversion box 2. A solenoid valve 13 is provided on the outer wall of the air inlet pipe 12.

[0078] Reference Figure 14The top of the workbench 1 is provided with two rectangular slots 50. A movable plate 51 is slidably connected to the top of the rectangular slots 50. Two sliding heat insulation plates 53 are provided at the bottom of the connecting plate 5. A slot is provided at the bottom of each sliding heat insulation plate 53. A trapezoidal pin 54 that mates with the slot is slidably connected to the top of the movable plate 51. A third spring 55 is fixedly connected to the bottom end of the trapezoidal pin 54, and the bottom end of the third spring 55 is fixedly connected to the bottom inner wall of the movable plate 51. A tension spring 52 is fixedly connected to the side of the movable plate 51 closest to the second groove 17, and the other end of the tension spring 52 is fixedly connected to the inner wall of one side of the rectangular slot 50. A second pull rope 56 is provided on the side of each movable plate 51 that is far apart from each other. The ends of the two second pull ropes 56 that are close to each other extend into the second groove 17 and are fixedly connected to the same plastic plate 57. The top of the plastic plate 57 is fixedly connected to the same plastic plate 57. A third magnet 58 is fixedly installed and cooperates with the first magnet 10. When the closed-loop reactor 7 moves above the second groove 17 after the reaction, the trapezoidal pin 54 is engaged in the sliding insulation plate 53 under the elastic force of the third spring 55. The two sliding insulation plates 53 are closed to prevent heat loss when the heating furnace 15 heats the closed-loop reactor 7. Then, the wind force generated by the rotating shaft 25 driving the fan blade 26 to rotate pushes the plastic plate 57 upward. The third magnet 58 and the first magnet 10 generate magnetic attraction, and the plastic plate 57 can move upward and fit against the first fixed plate 9. The plastic plate 57 pulls the moving plate 51 and the sliding insulation plate 53 to both sides through the second pull rope 56, releasing the sliding insulation plate 53 from the connecting plate 5, so that the wind force generated by the fan blade 26 can effectively and quickly cool the closed-loop reactor 7.

[0079] A method for using a continuous closed-loop reaction apparatus for the preparation of 2-pentylanthraquinone includes the following steps:

[0080] S1. Add the corresponding raw materials into the closed-loop reactor 7, inject nitrogen into the closed-loop reactor 7 through the air inlet pipe 12, replace the air in the reactor with nitrogen, drive the rotating disk 3 and the connecting plate 5 to rotate through the servo motor, and the connecting plate 5 rotates the closed-loop reactor 7 to be reacted above the first groove 16. The first fixed disk 9 and the second fixed disk 23 are magnetically attracted by the first magnet 10 and the second magnet 24. The output shaft of the cylinder 14 drives the heating furnace 15 to move down and cover the closed-loop reactor 7 to be reacted. The heating furnace 15 heats the closed-loop reactor 7. The drive motor 20 drives the stirring rod 8 to rotate through the round rod 22 and the second fixed disk 23 to stir the raw materials in the closed-loop reactor 7 and accelerate the reaction. Under the reaction temperature and reaction pressure, nitrogen is continuously supplied through the air inlet pipe 12 and the reaction pressure is maintained stable.

[0081] S2. After the reaction is completed, the heating furnace 15 returns to its original position and the rotating disk 3 drives the closed-loop reactor 7 to rotate above the second groove 17. Then, the heating furnace 15 and the drive motor 20 react the next closed-loop reactor 7. When the drive motor 20 drives the rotating shaft 21 to rotate, the drive motor 20 drives the fan blade 26 to rotate through the synchronous pulley and synchronous belt. The fan blade 26 cools the closed-loop reactor 7 from the bottom up, accelerating the cooling of the closed-loop reactor 7 and cooling it to room temperature.

[0082] S3, the rotating disk 3 drives the closed-loop reactor 7 to move above the third groove 18. The cooperation of the second magnet 24 and the first magnet 10 drives the first sliding rod 27 to move upward. The first pull rope 29 drives the connecting rod 28 to rotate. Through the lever principle, the connecting rod 28 drives the vertical rod 30 to move downward. The vertical rod 30 pulls the L-shaped tube 35 and the square tube 36 downward. The square tube 36 pushes the stop rod 38 downward. The round hole 40 moves downward and extends into the exhaust hole 37. At this time, the gas in the closed-loop reactor 7 enters the square tube 36 and the L-shaped tube 35 through the round hole 40, the exhaust chamber 39 and the through pipe 43, completing the collection of gas. The pressure in the closed-loop reactor 7 returns to normal pressure.

[0083] S4. When the square tube 36 is pressed downwards and the stop bar 38 is pushed, the sealing plate 46 releases the sealing ring 44 under the push of the through pipe 43, so that the gas can enter the L-shaped tube 35 through the through pipe 43.

[0084] S5. The rotating disk 3 continues to drive the closed-loop reactor 7 to rotate. The closed-loop reactor 7 moves to the top of the fourth groove 19. The magnetic attraction between the second fixed disk 23 and the first fixed disk 9 drives the second slide rod 47 and the horizontal plate 48 to move upward. The discharge pipe 11 is just inserted into the collection pipe 49. The valve on the outer wall of the discharge pipe 11 is activated, which can automatically collect the mixed liquid after the reaction in the closed-loop reactor 7.

[0085] S6. When the closed-loop reactor 7 moves above the second groove 17 after the reaction, the trapezoidal pin 54 is engaged in the sliding insulation plate 53 under the elastic force of the third spring 55. The two sliding insulation plates 53 are closed to prevent heat loss when the heating furnace 15 heats the closed-loop reactor 7. Then, the wind force generated by the rotating shaft 25 driving the fan blade 26 to rotate pushes the plastic plate 57 upward. The third magnet 58 and the first magnet 10 generate magnetic attraction, and the plastic plate 57 can move upward and fit against the first fixed plate 9. The plastic plate 57 pulls the moving plate 51 and the sliding insulation plate 53 to both sides through the second pull rope 56, releasing the sliding insulation plate 53 from the connecting plate 5, so that the wind force generated by the fan blade 26 can effectively and quickly cool the closed-loop reactor 7.

[0086] However, as is well known to those skilled in the art, the working principles and wiring methods of the solenoid valve 13, drive motor 20 and cylinder 14 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0087] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone, characterized in that, include: A workbench, on the top of which a gas conversion box is rotatably connected, and on the top of which a rotating disk is fixedly connected, and on the outer wall of which multiple connecting plates are fixedly connected, with a gasket fixedly connected to the top of each connecting plate, and a closed-loop reactor fixedly connected to the top of each gasket. A stirring rod is rotatably inserted inside the closed-loop reactor. The bottom end of the stirring rod extends to the bottom of the connecting plate and is fixedly connected to a first fixed plate. Multiple first magnets are fixedly connected to the bottom of the first fixed plate. A stirring structure is provided inside the workbench for stirring the raw materials in the closed-loop reactor and accelerating the reaction of the raw materials. The stirring structure includes a first groove provided inside the workbench, and a rotating shaft passes through the bottom of the first groove. An exhaust structure, installed inside the workbench, is used to reduce the gas pressure inside the closed-loop reactor to atmospheric pressure and collect the gas. The exhaust structure includes a third groove installed inside the workbench, and a first slide rod slides through the bottom inner wall of the third groove. The exhaust structure also includes a connecting rod rotatably connected to the bottom of the workbench via a base. A first pull rope is provided on one side of the top of the connecting rod, and the top of the first pull rope is fixedly connected to the bottom of the first slide rod. A vertical rod slides through the workbench, and the bottom of the vertical rod passes through the connecting rod. A retaining ring that cooperates with the connecting rod is fixedly sleeved on the outer wall of the vertical rod. A bracket is fixedly connected to the top of the workbench. A cylinder is fixedly connected to the top of the bracket. The output shaft of the cylinder passes through the bracket and is fixedly connected to a heating furnace. A circular ring that cooperates with a gasket is fixedly connected to the inner wall of the heating furnace. A sliding groove is provided in the bracket. A sliding plate is slidably connected in the sliding groove. Multiple first springs are fixedly connected to the bottom of the sliding plate, and the bottom of the first springs is fixedly connected to the bottom inner wall of the sliding groove. An L-shaped tube for collecting gas in the closed-loop reactor is fixedly connected to the top of the sliding plate. A square tube is fixedly connected to the bottom of the L-shaped tube. The top of the vertical rod is fixedly connected to the L-shaped tube. A collection structure is provided inside the workbench for collecting the mixed solution generated after the reaction in the closed-loop reactor. The collection structure includes a fourth groove provided inside the workbench, and a second sliding rod slides through the bottom inner wall of the fourth groove. The top ends of the rotating shaft, the first slide rod, and the second slide rod are all fixedly connected to a second fixing plate. The top of the second fixing plate is fixedly connected to a plurality of second magnets, and the second magnets cooperate with the first magnets.

2. The continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone according to claim 1, characterized in that, The stirring structure also includes a drive motor fixedly connected to the bottom of the workbench via a frame. The output shaft of the drive motor is fixedly connected to a round rod, the top end of which slides into the rotating shaft.

3. The continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone according to claim 2, characterized in that, The collection structure also includes a horizontal plate that is slidably connected to the worktable via a round rod. The horizontal plate is fixedly connected to the bottom end of the second sliding rod. A collection pipe slides through the horizontal plate, and the top end of the collection pipe slides through the worktable. A discharge pipe that cooperates with the collection pipe is fixedly connected through the bottom of the closed-loop reactor.

4. The continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone according to claim 3, characterized in that, The top of the workbench is provided with a second groove, and a rotating shaft is rotatably passed through the bottom inner wall of the second groove. A fan blade located in the second groove is fixedly connected to the top of the rotating shaft. Two synchronous pulleys are rotatably connected to the bottom of the workbench. The two synchronous pulleys are connected by a synchronous belt drive. The top of the rotating shaft slides through one of the synchronous pulleys, and the other synchronous pulley is fixedly sleeved on the outer wall of the rotating shaft.

5. The continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone according to claim 4, characterized in that, The top of the workbench is provided with an exhaust hole, and a stop rod that seals the exhaust hole is slidably connected inside the exhaust hole. An exhaust chamber is provided inside the stop rod, and the outer wall of the stop rod is provided with multiple round holes that communicate with the exhaust chamber. A through pipe that communicates with the exhaust chamber is fixedly passed through the inner part of the stop rod. A second spring that is fixedly connected to the top of the closed-loop reactor is sleeved on the outer wall of the stop rod, and the top end of the through pipe is fixedly connected to the outer wall of the stop rod.

6. The continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone according to claim 5, characterized in that, A sealing ring that mates with the through pipe is fixedly connected inside the square tube. Two rotating rods are rotatably connected inside the square tube. Two sealing plates for sealing the sealing ring are fixedly sleeved on the outer wall of the rotating rods. Two torsion springs are sleeved on the outer wall of the rotating rods. The ends of the two torsion springs that are close to each other are fixedly connected to the sealing plates, and the ends of the two torsion springs that are far apart from each other are fixedly connected to the inner walls of the two sides of the square tube.

7. The continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone according to claim 6, characterized in that, A pressure sensor is fixedly connected to one side of the closed-loop reactor, and the probe of the pressure sensor extends into the closed-loop reactor. A protective cover for protecting the pressure sensor is fixedly connected to one side of the closed-loop reactor. A gas injection pipe runs through the workbench, and the top end of the gas injection pipe extends rotatably into the gas conversion box. An air inlet pipe runs through one side of the closed-loop reactor, and one end of the air inlet pipe extends into the gas conversion box. A solenoid valve is provided on the outer wall of the air inlet pipe.

8. The continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone according to claim 7, characterized in that, The top of the workbench has two rectangular slots, and a movable plate is slidably connected to the top of the rectangular slots. The bottom of the connecting plate has two sliding heat insulation plates, and the bottom of the sliding heat insulation plates has a slot. The top of the movable plate is slidably connected to a trapezoidal pin that cooperates with the slot. The bottom end of the trapezoidal pin is fixedly connected to a third spring, and the bottom end of the third spring is fixedly connected to the bottom inner wall of the movable plate. A tension spring is fixedly connected to the side of the movable plate near the second groove, and the other end of the tension spring is fixedly connected to the inner wall of one side of the rectangular slot. A second pull rope is provided on the side of the two movable plates that are far apart from each other. The ends of the two second pull ropes that are close to each other extend into the second groove and are fixedly connected to the same plastic plate. A third magnet is fixedly embedded in the top of the plastic plate, and the third magnet cooperates with the first magnet.

9. A method of using a continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone, applied to the continuous closed-loop reaction apparatus for preparing 2-pentylanthraquinone as described in claim 8, characterized in that, Includes the following steps: S1. The rotating disk and connecting plate rotate to the top of the first groove. The first fixed disk and the second fixed disk are magnetically attracted by the first magnet and the second magnet. The driving motor drives the stirring rod to rotate, stirring the raw materials in the closed-loop reactor and accelerating the reaction. S2. After the reaction is completed, the closed-loop reactor rotates to the top of the second groove, and the drive motor drives the fan blades to rotate through the synchronous pulley and synchronous belt to accelerate the cooling of the closed-loop reactor. S3. The closed-loop reactor moves to the top of the third groove. The cooperation of the second magnet and the first magnet drives the vertical rod and the square tube to move down. The square tube pushes the baffle to move down. At this time, the gas in the closed-loop reactor enters the L-shaped tube through the round hole, completing the collection of the gas. The pressure in the closed-loop reactor returns to normal pressure. S4. When the square tube is pressed downwards, the stop bar is pushed by the through pipe, and the sealing plate releases the sealing ring, allowing gas to enter the L-shaped tube through the through pipe. S5. The closed-loop reactor moves to the top of the fourth groove. The magnetic attraction between the second fixed plate and the first fixed plate drives the second slide bar and the horizontal plate to move up. The discharge pipe is just inserted into the collection pipe, which can automatically collect the mixed liquid after the reaction in the closed-loop reactor. S6. When the closed-loop reactor moves above the second groove after the reaction, the wind force generated by the fan blades pushes the plastic plate upward. The plastic plate pulls the sliding insulation plate to both sides through the second pull rope, releasing the sealing of the connecting plate by the sliding insulation plate.

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