A preparation method of heliotropin

Abstract

The present invention discloses a preparation method of piperonal, which relates to the technical field of organic catalytic synthesis. The preparation method of piperonal is realized through a preparation device for piperonal. The preparation device for piperonal includes a reaction housing. A filter plate is fixedly arranged at the bottom of the inner cavity of the reaction housing. An air inlet driving mechanism is jointly arranged at the top of the reaction housing and inside the reaction housing. A trigger-type closing mechanism is arranged at the outer top of the air inlet driving mechanism. The bottom end of the air inlet driving mechanism is drivingly connected with a liquid diversion mechanism. A gas diversion mechanism is arranged at the center of the bottom of the liquid diversion mechanism. The present invention effectively increases the reaction contact area between hydrogen and piperonal propionaldehyde, thereby shortening the reaction time required, greatly improving the reaction efficiency, and being more suitable for industrial production.

Description

Technical Field

[0001] The present invention relates to the technical field of organic catalytic synthesis, and particularly relates to a preparation method of piperonal acetaldehyde. Background Art

[0002] Piperonal acetaldehyde is a colorless to light yellow oily liquid with floral, fresh, aldehyde and ozone-like aromas. It is insoluble in water and soluble in alcohol, and is mainly used in floral type daily-use fragrances such as cyclamen and lilac.

[0003] The invention patent with the authorized announcement number CN 104557849 B discloses a method for catalytic synthesis of piperonal acetaldehyde by using a composite catalyst, which relates to the technical field of organic catalytic synthesis. Piperonal and propionaldehyde first undergo a condensation reaction under the action of the composite catalyst to obtain piperonylidene propionaldehyde, and then undergo a reduction reaction with hydrogen to obtain the target product piperonal acetaldehyde.

[0004] After the preparation of piperonylidene propionaldehyde is completed in the above preparation method, hydrogen needs to be introduced into the reaction kettle to make piperonylidene propionaldehyde undergo a reduction reaction with hydrogen. After the reaction is completed, the composite catalyst needs to be output and filtered for recovery, and finally the solvent is removed by rotary evaporation to obtain the target product piperonal acetaldehyde.

[0005] However, it is found by those skilled in the art after applying the above synthesis method that in the actual reaction process of directly introducing hydrogen into the reaction kettle, the reaction contact area between hydrogen and piperonylidene propionaldehyde is only the liquid surface area of piperonylidene propionaldehyde, that is, after hydrogen enters the reaction kettle, it can only react with piperonylidene propionaldehyde at the liquid surface position, which results in a longer reaction time and the reaction efficiency needs to be improved.

[0006] Therefore, it is necessary to invent a preparation method of piperonal acetaldehyde to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a preparation method of piperonal acetaldehyde to solve the problems mentioned in the above background art.

[0008] To achieve the above purpose, the present invention provides the following technical solution: A preparation method of piperonal acetaldehyde, the preparation method of piperonal acetaldehyde is realized by a preparation device of piperonal acetaldehyde. The preparation device of piperonal acetaldehyde includes a reaction housing, a filter plate is fixedly arranged at the bottom of the inner cavity of the reaction housing, an air inlet driving mechanism is jointly arranged at the top of the reaction housing and inside the reaction housing, a trigger-type closing mechanism is arranged at the outer top of the air inlet driving mechanism, the bottom end of the air inlet driving mechanism is drivingly connected with a liquid guiding mechanism, and a gas guiding mechanism is arranged at the center of the bottom of the liquid guiding mechanism;

[0009] The intake driving mechanism includes a driving screw, a driving motor, driving gears, air outlet holes, a gas supply pipe, a threaded collar, a positioning plate, and positioning rods;

[0010] The driving screw is located inside the reaction housing and extends outside the reaction housing and is rotatably connected to the reaction housing through a bearing. The driving motor is fixedly arranged on the right side of the top of the reaction housing. There are two driving gears, and the two driving gears mesh with each other. One driving gear is fixedly sleeved on the outer top of the driving screw, and the other driving gear is in transmission connection with the driving motor. The air outlet holes are opened at the top of the front of the driving screw. The gas supply pipe is connected to the top end of the driving screw through a rotary joint. The threaded collar is sleeved on the outer side of the driving screw and is threadedly connected to the driving screw. The positioning plate is fixedly sleeved on the outer top of the threaded collar. There are two positioning rods, and the two positioning rods respectively slide through the two sides of the bottom of the positioning plate and are fixedly connected to the inner wall of the reaction housing;

[0011] The trigger-type closing mechanism includes a first spring, a closing sleeve, a connecting rod, and a contact ring;

[0012] The first spring, the closing sleeve, and the contact ring are sleeved on the outer top of the driving screw in sequence from top to bottom. The top end of the first spring is fixedly connected to the inner wall of the reaction housing, and the bottom end of the first spring is fixedly connected to the closing sleeve. The closing sleeve blocks the air outlet holes. There are multiple connecting rods, and the multiple connecting rods are evenly and fixedly arranged at the bottom of the closing sleeve and are all fixedly connected to the contact ring.

[0013] Preferably, the liquid guiding mechanism includes a partition plate, a second spring, a sliding plate, a diversion channel, a secondary limiting block, an avoidance groove, a main limiting block, an air outlet pipe, and a third spring.

[0014] Preferably, the partition plate is slidably arranged inside the reaction housing in the vertical direction and is located above the filter plate. There are two second springs, two sliding plates, two secondary limiting blocks, and two avoidance grooves.

[0015] Preferably, the two second springs are slidably and fixedly arranged on both sides inside the partition plate. The two sliding plates are respectively slidably arranged on both sides inside the partition plate and are respectively fixedly connected to the two second springs. There are multiple diversion channels, and the multiple diversion channels are respectively and evenly penetrated in the vertical direction through the top of the partition plate, the bottom of the partition plate, and the two second springs. The two secondary limiting blocks are respectively fixedly arranged on the inner tops of the two sliding plates. The two avoidance grooves are respectively opened on one side of the two secondary limiting blocks close to each other.

[0016] Preferably, the two second springs are slidably and fixedly arranged on both sides inside the partition board. The two sliding plates are respectively slidably arranged on both sides inside the partition board and are respectively fixedly connected to the two second springs. A plurality of diversion channels are provided, and the plurality of diversion channels are uniformly arranged in the vertical direction and penetrate through the top of the partition board, the bottom of the partition board, and the two second springs respectively. The two secondary limit blocks are respectively fixedly arranged on the inner tops of the two sliding plates, and the two avoidance grooves are respectively opened on the sides of the two secondary limit blocks close to each other.

[0017] Preferably, the gas diversion mechanism includes a fourth spring, a diversion seat, a diversion groove, and a gas channel.

[0018] Preferably, the fourth spring is fixedly arranged at the bottom of the inner cavity of the reaction housing. The diversion seat is slidably penetrated through the center of the bottom of the filter plate and is fixedly connected to the fourth spring. The diversion groove is opened at the center of the top of the diversion seat, and the gas channel is opened at the center of the bottom of the partition board.

[0019] Preferably, the preparation method of heliotropin specifically includes the following steps:

[0020] S1. Add piperonal, an organic solvent, and a composite catalyst into the reaction housing. Piperonal is dissolved in the organic solvent, and then the raw materials are heated by the electric heating element inside the reaction housing, and propionaldehyde is continuously added dropwise. After dropping, keep the reaction at a constant temperature to obtain piperonalylidene propionaldehyde.

[0021] S2. Make the driving motor drive the driving screw to rotate through the driving gear, and at the same time input hydrogen into the driving screw through the air supply pipe. When the driving screw rotates, it drives the threaded collar guided by the positioning plate and the positioning rod to continuously rise. When the threaded collar rises, it drives the partition board to rise. When the partition board rises, it pushes the liquid material on its top, so that it moves upward inside the reaction housing.

[0022] S3. As the partition board continuously rises, the partition board moves away from the top of the filter plate. At this time, the upper part of the partition board is the first reaction chamber, and a second reaction chamber is formed between the partition board and the filter plate. In addition, during the rising process of the partition board, the main limit block moves downward relatively, and then gradually releases the pushing force on the avoidance groove. The diversion seat moves upward synchronously with the partition board under the push of the fourth spring.

[0023] S4. When the rising distance of the partition board reaches the first threshold value, the fourth spring is completely reset. At this time, the diversion seat no longer blocks the gas channel at the center of the bottom of the partition board. The hydrogen inside the driving screw is output from the bottom end of the air outlet pipe, and then is shot into the diversion groove through the gas channel and diffuses in the second reaction chamber under the guidance of the inner wall of the diversion groove.

[0024] S5, when the ascending distance of the partition plate reaches the second threshold value, the guide channel on the sliding plate is arranged in line with the guide channel on the partition plate, and the feed liquid on the partition plate continuously passes through the plurality of partition plates and flows downward, and then flows to the second reaction chamber, and at the same time, during the downward flow, the piperonyl propionaldehyde in the feed liquid undergoes a reduction reaction with hydrogen;

[0025] S6. When the ascending distance of the partition plate reaches the third threshold, the threaded collar pushes the closed sleeve through the contact ring and the connecting rod, thereby releasing the blocking of the air outlet by the closed sleeve. At this time, the hydrogen inside the driving screw enters the first reaction chamber through the air outlet to react with the liquid in the first reaction chamber that has not yet entered the second reaction chamber;

[0026] S7, the reacted liquid in the second reaction chamber finally falls to the top of the filter plate, the composite catalyst in the liquid is passed through the filter plate, and the liquid passes through the filter plate and is output, and the output liquid is subjected to rotary evaporation to obtain the target product, neoheptyrol.

[0027] Technical effects and advantages of the present invention:

[0028] The present invention is provided with an air intake drive mechanism, a trigger-type closing mechanism, a liquid guide mechanism and a gas guide mechanism, so that the air intake drive mechanism is used to drive the liquid guide mechanism, thereby driving the reacted liquid to rise, so that a second reaction chamber is formed between the liquid guide mechanism and the filter plate, and the liquid guide mechanism is triggered due to continuous driving, and after being triggered, the liquid in the first reaction chamber begins to enter the second reaction chamber, at which time the hydrogen input into the second reaction chamber by the air intake drive mechanism reacts with the liquid entering the second reaction chamber through the liquid guide mechanism, and finally, as the liquid guide mechanism continues to rise, the liquid guide mechanism triggers the trigger-type closing mechanism, thereby causing the first reaction chamber to react synchronously, and compared with the same type of device or method in the prior art, the present invention effectively increases the reaction contact area between hydrogen and piperonyl propionaldehyde, thereby shortening the time required for the reaction, greatly improving the reaction efficiency, and being more suitable for industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall front view structure of the reaction shell of the present invention after being cut open.

[0030] Figure 2 It is a schematic diagram of the overall front cross-sectional structure of the present invention.

[0031] Figure 3 It is a schematic diagram of the front cross-sectional structure of a part of the air intake drive mechanism and the trigger-type sealing mechanism of the present invention.

[0032] Figure 4Front cross-sectional structural schematic diagram of the liquid diversion mechanism and gas diversion mechanism of the present invention.

[0033] Figure 5 of the present invention Figure 4 Enlarged structural schematic diagram of part A in

[0034] In the figure: 1, reaction housing; 2, filter plate; 3, intake air driving mechanism; 31, driving screw; 32, driving motor; 33, driving gear; 34, air outlet hole; 35, air supply pipe; 36, threaded collar; 37, positioning plate; 38, positioning rod; 4, trigger-type closing mechanism; 41, first spring; 42, closing sleeve; 43, connecting rod; 44, contact ring; 5, liquid diversion mechanism; 51, partition plate; 52, second spring; 53, sliding plate; 54, diversion channel; 55, secondary limit block; 56, avoidance groove; 57, main limit block; 58, air outlet pipe; 59, third spring; 6, gas diversion mechanism; 61, fourth spring; 62, diversion seat; 63, diversion groove; 64, gas channel. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment 1

[0037] The present invention provides a preparation method of a new heliotropin as shown in Figures 1-5 The preparation method of the new heliotropin is realized by a preparation device for the new heliotropin. The preparation device for the new heliotropin includes a reaction housing 1. A filter plate 2 is fixedly arranged at the bottom of the inner cavity of the reaction housing 1. An intake air driving mechanism 3 is jointly arranged at the top of the reaction housing 1 and inside the reaction housing 1. A trigger-type closing mechanism 4 is arranged at the outer top of the intake air driving mechanism 3. The bottom end of the intake air driving mechanism 3 is drivingly connected to a liquid diversion mechanism 5. A gas diversion mechanism 6 is arranged at the center of the bottom of the liquid diversion mechanism 5.

[0038] As shown in Figure 3As shown, the air intake drive mechanism 3 includes a drive screw 31, a drive motor 32, a drive gear 33, an air outlet 34, an air supply pipe 35, a threaded collar 36, a positioning plate 37 and a positioning rod 38, wherein the drive screw 31 is located inside the reaction shell 1, extends to the outside of the reaction shell 1 and is rotatably connected to the reaction shell 1 through a bearing, the drive motor 32 is fixedly arranged on the right side of the top of the reaction shell 1, and two drive gears 33 are provided, the two drive gears 33 are meshed with each other, and one drive gear 33 is fixedly sleeved on the drive screw 31 At the top of the outer side, another driving gear 33 is transmission-connected with the driving motor 32, the air outlet 34 is opened at the top of the front side of the driving screw 31, the air supply pipe 35 is connected to the top of the driving screw 31 through a rotating joint, the threaded collar 36 is sleeved on the outside of the driving screw 31 and is threadedly connected to the driving screw 31, the positioning plate 37 is fixedly sleeved on the top of the outer side of the threaded collar 36, and two positioning rods 38 are provided, and the two positioning rods 38 are respectively slidably penetrated on both sides of the bottom of the positioning plate 37, and are fixedly connected to the inner wall of the reaction shell 1.

[0039] By setting the above structure, the driving motor 32 can drive the driving screw 31 to rotate through the driving gear 33, and the driving screw 31 can drive the threaded collar 36 guided by the positioning plate 37 and the positioning rod 38 to rise and fall. At the same time, the air supply pipe 35 inputs hydrogen into the driving screw 31, and the hydrogen can be output through the air outlet 34 and the threaded collar 36 at the bottom end of the driving screw 31.

[0040] like Figure 3 As shown, the trigger-type sealing mechanism 4 includes a first spring 41, a sealing sleeve 42, a connecting rod 43 and a contact ring 44, wherein the first spring 41, the sealing sleeve 42 and the contact ring 44 are sequentially sleeved and arranged on the outer top of the driving screw 31 from top to bottom, the top end of the first spring 41 is fixedly connected to the inner wall of the reaction shell 1, the bottom end of the first spring 41 is fixedly connected to the sealing sleeve 42, the sealing sleeve 42 blocks the air outlet 34, and a plurality of connecting rods 43 are provided, and the plurality of connecting rods 43 are evenly fixedly arranged at the bottom of the sealing sleeve 42, and are all fixedly connected to the contact ring 44.

[0041] By setting the above structure, the threaded ring 36 can push the closed sleeve 42 through the contact ring 44 and the connecting rod 43, so that the closed sleeve 42 releases the blockage of the air outlet 34. At this time, the hydrogen inside the driving screw 31 enters the first reaction chamber through the air outlet 34 to react with the liquid in the first reaction chamber that has not yet entered the second reaction chamber.

[0042] like Figure 4 and Figure 5As shown, the liquid diversion mechanism 5 includes a partition plate 51, a second spring 52, a sliding plate 53, a diversion channel 54, a secondary limit block 55, an avoidance groove 56, a main limit block 57, an air outlet pipe 58, and a third spring 59. Among them, the partition plate 51 is slidably arranged inside the reaction housing 1 in the vertical direction and is located above the filter plate 2. There are two second springs 52, two sliding plates 53, two secondary limit blocks 55, and two avoidance grooves 56. The two second springs 52 are slidably fixed on both sides inside the partition plate 51. The two sliding plates 53 are respectively slidably arranged on both sides inside the partition plate 51 and are respectively fixedly connected to the two second springs 52. There are multiple diversion channels 54, and the multiple diversion channels 54 are respectively uniformly arranged in the vertical direction and penetrate through the top of the partition plate 51, the bottom of the partition plate 51, and the two second springs 52. The two secondary limit blocks 55 are respectively fixedly arranged on the inner tops of the two sliding plates 53. The two avoidance grooves 56 are respectively opened on one side of the two secondary limit blocks 55 close to each other. The two second springs 52 are slidably fixed on both sides inside the partition plate 51. The two sliding plates 53 are respectively slidably arranged on both sides inside the partition plate 51 and are respectively fixedly connected to the two second springs 52. There are multiple diversion channels 54, and the multiple diversion channels 54 are respectively uniformly arranged in the vertical direction and penetrate through the top of the partition plate 51, the bottom of the partition plate 51, and the two second springs 52. The two secondary limit blocks 55 are respectively fixedly arranged on the inner tops of the two sliding plates 53. The two avoidance grooves 56 are respectively opened on one side of the two secondary limit blocks 55 close to each other.

[0043] By setting the above structure, when the partition plate 51 rises, it is convenient to push the liquid material on its top, so that it moves upward inside the reaction housing 1. At the same time, as the partition plate 51 continues to rise, the partition plate 51 moves away from the top of the filter plate 2. At this time, the upper part of the partition plate 51 is the first reaction chamber, and a second reaction chamber is formed between the partition plate 51 and the filter plate 2. In addition, during the rising process of the partition plate 51, the main limit block 57 moves downward relatively, and thus gradually releases the push on the avoidance groove 56.

[0044] Moreover, when the rising distance of the partition plate 51 reaches the second threshold value, the diversion channels 54 on the sliding plate 53 and the diversion channels 54 on the partition plate 51 are collinearly arranged. At this time, the liquid material on the partition plate 51 continuously flows downward through the multiple partition plates 51 and then flows into the second reaction chamber.

[0045] Such as Figure 4 And Figure 5As shown in the figure, the gas diversion mechanism 6 includes a fourth spring 61, a diversion seat 62, a diversion groove 63, and a gas passage 64. Among them, the fourth spring 61 is fixedly arranged at the bottom of the inner cavity of the reaction housing 1, the diversion seat 62 is slidably penetrated through the center of the bottom of the filter plate 2 and is fixedly connected to the fourth spring 61, the diversion groove 63 is opened at the center of the top of the diversion seat 62, and the gas passage 64 is opened at the center of the bottom of the partition plate 51.

[0046] By setting the above structure, when the partition plate 51 rises, the diversion seat 62 will synchronously move upward with the partition plate 51 under the push of the fourth spring 61. When the rising distance of the partition plate 51 reaches the first threshold, the fourth spring 61 is fully reset. At this time, the diversion seat 62 no longer blocks the gas passage 64 at the center of the bottom of the partition plate 51, and the hydrogen inside the driving screw 31 is output through the bottom end of the air outlet pipe 58, and then shoots into the diversion groove 63 through the gas passage 64 and diffuses in the second reaction chamber under the diversion of the inner wall of the diversion groove 63.

[0047] Embodiment 2

[0048] The preparation method of heliotropin specifically includes the following steps:

[0049] S1. Add piperonal, an organic solvent, and a composite catalyst into the reaction housing 1. Piperonal is dissolved in the organic solvent, and then the raw materials are heated by the electric heating element inside the reaction housing 1, and propionaldehyde is continuously added dropwise. After dropping, keep the reaction at a constant temperature to obtain piperonalylideneacetone.

[0050] S2. Make the driving motor 32 drive the driving screw 31 to rotate through the driving gear 33, and at the same time input hydrogen into the driving screw 31 through the air supply pipe 35. When the driving screw 31 rotates, it drives the threaded collar 36 guided by the positioning plate 37 and the positioning rod 38 to continuously rise. When the threaded collar 36 rises, it drives the partition plate 51 to rise. When the partition plate 51 rises, it pushes the liquid material on its top, so that it moves upward inside the reaction housing 1.

[0051] S3. As the partition plate 51 continuously rises, the partition plate 51 moves away from the top of the filter plate 2. At this time, the first reaction chamber is above the partition plate 51, and the second reaction chamber is formed between the partition plate 51 and the filter plate 2. In addition, during the rising process of the partition plate 51, the main limit block 57 moves downward relatively, and then gradually releases the push on the avoidance groove 56, and the diversion seat 62 will synchronously move upward with the partition plate 51 under the push of the fourth spring 61.

[0052] S4. When the rising distance of the partition plate 51 reaches the first threshold, the fourth spring 61 is fully reset. At this time, the diversion seat 62 no longer blocks the gas passage 64 at the center of the bottom of the partition plate 51. The hydrogen gas inside the driving screw 31 is output from the bottom end of the air outlet pipe 58, and then is shot into the diversion groove 63 through the gas passage 64 and diffuses in the second reaction chamber under the diversion of the inner wall of the diversion groove 63;

[0053] S5. When the rising distance of the partition plate 51 reaches the second threshold, the diversion channels 54 on the sliding plate 53 and the partition plate 51 are arranged collinearly. At this time, the liquid material on the partition plate 51 continuously flows downward through the plurality of partition plates 51 and then flows into the second reaction chamber. At the same time, during the downward flow, the piperonal propionaldehyde in the liquid material reacts with hydrogen gas;

[0054] S6. When the rising distance of the partition plate 51 reaches the third threshold, the threaded collar 36 pushes the closed sleeve 42 through the contact ring 44 and the connecting rod 43, so that the closed sleeve 42 releases the blockage of the air outlet hole 34. At this time, the hydrogen gas inside the driving screw 31 enters the first reaction chamber through the air outlet hole 34 and reacts with the liquid material in the first reaction chamber that has not entered the second reaction chamber;

[0055] S7. The reacted liquid material in the second reaction chamber finally falls to the top of the filter plate 2. The composite catalyst in the liquid material is filtered by the filter plate 2, and the liquid material passes through the filter plate 2 and is output. The output liquid material is subjected to rotary evaporation treatment to obtain the target product, piperonal.

[0056] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A preparation device for heliotropin, characterized in that: It includes a reaction housing (1), a filter plate (2) is fixedly arranged at the bottom of the inner cavity of the reaction housing (1), an air intake driving mechanism (3) is jointly arranged at the top of the reaction housing (1) and inside the reaction housing (1), a trigger-type closing mechanism (4) is arranged at the top outside of the air intake driving mechanism (3), the bottom end of the air intake driving mechanism (3) is drivingly connected to a liquid guiding mechanism (5), and a gas guiding mechanism (6) is arranged at the center of the bottom of the liquid guiding mechanism (5); The air intake driving mechanism (3) includes a driving screw (31), a driving motor (32), a driving gear (33), an air outlet hole (34), an air supply pipe (35), a threaded collar (36), a positioning plate (37) and a positioning rod (38); The driving screw (31) is located inside the reaction housing (1) and extends outside the reaction housing (1) and is rotationally connected to the reaction housing (1) through a bearing. The driving motor (32) is fixedly arranged on the right side of the top of the reaction housing (1). There are two driving gears (33), and the two driving gears (33) mesh with each other. One driving gear (33) is fixedly sleeved on the outside of the top of the driving screw (31), and the other driving gear (33) is drivingly connected to the driving motor (32). The air outlet hole (34) is opened at the top of the front surface of the driving screw (31). The air supply pipe (35) is connected to the top end of the driving screw (31) through a rotary joint. The threaded collar (36) is sleeved on the outside of the driving screw (31) and is threadedly connected to the driving screw (31). The positioning plate (37) is fixedly sleeved on the outside of the top of the threaded collar (36). There are two positioning rods (38), and the two positioning rods (38) respectively slide through the two sides of the bottom of the positioning plate (37) and are fixedly connected to the inner wall of the reaction housing (1); The trigger-type closing mechanism (4) includes a first spring (41), a closing sleeve (42), a connecting rod (43) and a contact ring (44); The first spring (41), the closing sleeve (42) and the contact ring (44) are sleeved on the outside of the top of the driving screw (31) in sequence from top to bottom. The top end of the first spring (41) is fixedly connected to the inner wall of the reaction housing (1), the bottom end of the first spring (41) is fixedly connected to the closing sleeve (42), the closing sleeve (42) blocks the air outlet hole (34), there are multiple connecting rods (43), and the multiple connecting rods (43) are evenly and fixedly arranged at the bottom of the closing sleeve (42) and are all fixedly connected to the contact ring (44); The liquid guiding mechanism (5) includes a partition plate (51), a second spring (52), a sliding plate (53), a guiding channel (54), a secondary limiting block (55), an avoidance groove (56), a main limiting block (57), an air outlet pipe (58) and a third spring (59).

2. The preparation equipment of a new heliotropin according to claim 1, characterized in that: The partition plate (51) is slidably arranged inside the reaction shell (1) in the vertical direction and is located at the top of the filter plate (2). There are two second springs (52), sliding plates (53), secondary limit blocks (55) and avoidance grooves (56).

3. The preparation equipment for a new heliotropin according to claim 2, characterized in that: The two second springs (52) are slidably and fixedly arranged on both sides inside the partition plate (51). The two sliding plates (53) are respectively slidably arranged on both sides inside the partition plate (51) and are respectively fixedly connected to the two second springs (52). A plurality of diversion channels (54) are provided. The plurality of diversion channels (54) are respectively uniformly arranged in the vertical direction through the top of the partition plate (51), the bottom of the partition plate (51) and the two second springs (52). The two secondary limit blocks (55) are respectively fixedly arranged at the inner tops of the two sliding plates (53). The two avoidance grooves (56) are respectively opened on one side of the two secondary limit blocks (55) close to each other.

4. The preparation equipment for a new heliotropin according to claim 3, characterized in that: The main limit block (57) is located between the two secondary limit blocks (55). The air outlet pipe (58) is rotationally nested inside the main limit block (57) through a bearing, and its top end is slidably nested inside the driving screw rod (31). The third spring (59) is sleeved outside the air outlet pipe (58). One end of the third spring (59) is in contact with the main limit block (57) and the other end is in contact with the driving screw rod (31).

5. The preparation equipment of a new heliotropin according to claim 4, characterized in that: The gas diversion mechanism (6) includes a fourth spring (61), a diversion seat (62), a diversion groove (63) and a gas channel (64).

6. The preparation equipment of a new heliotropin according to claim 5, characterized in that: The fourth spring (61) is fixedly arranged at the bottom of the inner cavity of the reaction shell (1). The diversion seat (62) is slidably penetrated through the center of the bottom of the filter plate (2) and is fixedly connected to the fourth spring (61). The diversion groove (63) is opened at the center of the top of the diversion seat (62). The gas channel (64) is opened at the center of the bottom of the partition plate (51).

7. A method for preparing heliotropin, characterized in that, It is realized by using a preparation device for a new heliotropin as described in claim 6. The method specifically includes the following steps: S1. Add piperonal, an organic solvent and a composite catalyst into the reaction shell (1). Piperonal is dissolved in the organic solvent. Then, use the electric heating element inside the reaction shell (1) to heat the raw materials, and continuously drop propionaldehyde. After dropping, keep the reaction at a constant temperature to obtain piperonalylidene propionaldehyde; S2. Make the driving motor (32) drive the driving screw rod (31) to rotate through the driving gear (33). At the same time, input hydrogen into the driving screw rod (31) through the air supply pipe (35). When the driving screw rod (31) rotates, it drives the threaded collar (36) guided by the positioning plate (37) and the positioning rod (38) to continuously rise. When the threaded collar (36) rises, it drives the partition plate (51) to rise. When the partition plate (51) rises, it pushes the liquid material on its top, so that it moves upward inside the reaction shell (1). S3. As the partition plate (51) continuously rises, the partition plate (51) moves away from the top of the filter plate (2). At this time, the upper part of the partition plate (51) is the first reaction chamber, and a second reaction chamber is formed between the partition plate (51) and the filter plate (2). Additionally, during the rising process of the partition plate (51), the main limit block (57) moves downward relatively, thereby gradually releasing the push on the avoidance groove (56), and the diversion seat (62) synchronously moves upward with the partition plate (51) under the push of the fourth spring (61). S4. When the rising distance of the partition plate (51) reaches the first threshold, the fourth spring (61) is fully reset. At this time, the diversion seat (62) no longer blocks the gas passage (64) at the center of the bottom of the partition plate (51). The hydrogen gas inside the driving screw (31) is output through the bottom end of the air outlet pipe (58), and then is ejected through the gas passage (64) to the diversion groove (63), and diffuses in the second reaction chamber under the guidance of the inner wall of the diversion groove (63). S5. When the rising distance of the partition plate (51) reaches the second threshold, the diversion channels (54) on the sliding plate (53) and the partition plate (51) are arranged collinearly. At this time, the liquid material on the partition plate (51) continuously flows downward through the plurality of partition plates (51), and then flows into the second reaction chamber. Meanwhile, during the downward flow process, the piperonal propionaldehyde in the liquid material reacts with hydrogen gas. S6. When the rising distance of the partition plate (51) reaches the third threshold, the threaded collar (36) pushes the closed sleeve (42) through the contact ring (44) and the connecting rod (43), thereby enabling the closed sleeve (42) to release the blockage of the air outlet hole (34). At this time, the hydrogen gas inside the driving screw (31) enters the first reaction chamber through the air outlet hole (34) and reacts with the liquid material in the first reaction chamber that has not yet entered the second reaction chamber. S7. The reacted liquid material in the second reaction chamber finally falls to the top of the filter plate (2). The composite catalyst in the liquid material is intercepted by the filter plate (2), and the liquid material passes through the filter plate (2) and is output. The output liquid material is subjected to rotary evaporation treatment to obtain the target product, heliotropin.

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