Continuous flow synthesis reaction kettle for methyl acetoacetate

Abstract

The utility model discloses a continuous flow synthesis reaction kettle for methyl acetoacetate, which belongs to the technical field of methyl acetoacetate preparation and comprises a reaction kettle body, two electric push rods are symmetrically mounted on the top surface of the reaction kettle body, and the output ends of the two electric push rods penetrate into an inner cavity of the reaction kettle body and are jointly connected with a hollow block. A plurality of nozzles for spraying water to clean methyl acetoacetate are equidistantly mounted on the peripheral side of the hollow block, an annular block is slidably arranged on the peripheral side of the hollow block, a brush for cleaning methyl acetoacetate is adhered to the peripheral side of the annular block, a driving motor is mounted on the bottom surface of the reaction kettle body, and the output end of the driving motor penetrates through the reaction kettle body and is connected with a rotating plate; two rhombic blocks are symmetrically welded to the top face of the rotating plate, and rhombic grooves allowing the rhombic blocks to penetrate through are symmetrically formed in the top face of the annular block. According to the continuous flow synthesis reaction kettle for methyl acetoacetate, the problem that part of residual residues are inconvenient to clean is solved, and the preparation quality of methyl acetoacetate is improved.

Description

Technical Field

[0001] This invention belongs to the field of methyl acetoacetate preparation technology, and in particular to a continuous flow synthesis reactor for methyl acetoacetate. Background Technology

[0002] Methyl acetoacetate is a colorless liquid with a characteristic odor and is readily soluble in water. Its main uses are as an intermediate in the pharmaceutical industry, pesticides, and herbicides. Currently, reaction vessels are used to mix and prepare methyl acetoacetate. However, most reaction equipment lacks cleaning devices, and it is difficult for personnel to clean the interior of the reaction vessel. This results in residual raw materials remaining inside the reaction vessel affecting subsequent mixing and preparation of methyl acetoacetate, thus reducing the quality of the prepared methyl acetoacetate.

[0003] A Chinese patent (authorization announcement number CN220759244U) discloses a continuous flow synthesis reactor for methyl acetoacetate, which "includes a reactor body and a pressure relief assembly interconnected to one side of the top of the reactor body. The pressure relief assembly includes a pressure relief pipe, an exhaust channel, an exhaust pipe, and a float. The exhaust channel is opened at the bottom of the inside of the pressure relief pipe, and the exhaust pipe is fixedly connected inside the pressure relief pipe."

[0004] It is evident that the cited patent document has the problem that some residue remaining in the reactor can affect the next mixing and preparation. Utility Model Content

[0005] The purpose of this invention is to provide a continuous flow synthesis reactor for methyl acetoacetate to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a continuous flow synthesis reactor for methyl acetoacetate, comprising a reactor body, two electric push rods symmetrically mounted on the top surface of the reactor body, the output ends of the two electric push rods penetrating into the inner cavity of the reactor body and connected to a hollow block, a plurality of nozzles for spraying water to clean methyl acetoacetate are equidistantly mounted on the periphery of the hollow block, an annular block is slidably provided on the periphery of the hollow block, and a brush for cleaning methyl acetoacetate is adhered to the periphery of the annular block, a drive motor is mounted on the bottom surface of the reactor body, the output end of the drive motor penetrates the reactor body and is connected to a rotating plate, two rhomboid blocks are symmetrically welded on the top surface of the rotating plate, and rhomboid grooves for the rhomboid blocks to pass through are symmetrically opened on the top surface of the annular block.

[0007] Preferably, the top surface of the hollow block is symmetrically connected to a connecting pipe, and the free ends of both connecting pipes extend to the outside of the reactor body and are connected to a water supply device.

[0008] Preferably, a limiting groove is formed on the periphery of the hollow block, and a limiting block is welded to the inner wall of the annular block.

[0009] Preferably, the limiting block is slidably disposed on the periphery of the limiting groove, and both the limiting block and the limiting groove are T-shaped.

[0010] Preferably, an annular plate is installed on the inner side wall of the reactor body, and a groove is formed on the inner side wall of the annular plate.

[0011] Preferably, each of the two rhomboid blocks has a slider welded to its top, and both sliders are adapted to slide in the groove.

[0012] Preferably, a rotary motor is installed on the top surface of the reactor body, and the output end of the rotary motor passes through the reactor body and is connected to a rotating rod. Several mixing rods for continuous flow synthesis of methyl acetoacetate are installed at equal intervals around the rotating rod.

[0013] Compared with the prior art, the technical effects and advantages of this utility model are as follows:

[0014] This continuous flow synthesis reactor for methyl acetoacetate uses an electric pusher to power the movement of a hollow block, enabling the nozzle to reciprocate and clean some residues remaining in the inner cavity of the reactor body. Compared to existing devices for preparing methyl acetoacetate, this device can clean the residues left behind by the methyl acetoacetate, preventing these residues from affecting the preparation of methyl acetoacetate in subsequent batches.

[0015] By turning on the drive motor, power can be provided for the rotation of the two rhomboid blocks, thereby enabling the ring block to rotate. This allows the brush to clean the inner wall of the reactor body, and in conjunction with the nozzle, it can improve the cleaning effect on the remaining residue. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the reaction vessel body of this utility model;

[0019] Figure 3 This is a schematic diagram of the hollow block and the annular block of this utility model;

[0020] Figure 4 For the present utility model Figure 2 Enlarged schematic diagram of the structure at point A;

[0021] Figure 5 This is a schematic diagram of the rotating plate and rhomboid block of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] In the diagram: 1. Reactor body; 2. Electric push rod; 3. Hollow block; 4. Nozzle; 5. Annular block; 6. Brush; 7. Drive motor; 8. Rotating plate; 9. Rhomboid block; 10. Rhomboid groove; 11. Connecting pipe; 12. Limiting groove; 13. Limiting block; 14. Annular plate; 15. Slide groove; 16. Sliding block; 17. Rotary motor; 18. Rotating rod; 19. Mixing rod. Detailed Implementation

[0024] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0025] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0026] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0027] like Figures 1 to 5 The continuous flow synthesis reactor for methyl acetoacetate shown includes a reactor body 1. The reactor body 1 has a feed inlet on its periphery and a discharge outlet on its bottom surface. The methyl acetoacetate raw materials (such as diketene and methanol) to be prepared can be fed into the reactor body 1 through the feed inlet. After preparation, the raw materials will be discharged from the reactor body 1 through the discharge outlet.

[0028] Two electric push rods 2 are symmetrically installed on the top surface of the reactor body 1. The output ends of the two electric push rods 2 penetrate into the inner cavity of the reactor body 1 and are connected to a hollow block 3. Several nozzles 4 for spraying water to clean methyl acetoacetate are equidistantly installed on the periphery of the hollow block 3. The top surface of the hollow block 3 is symmetrically connected to a connecting pipe 11. The free ends of the two connecting pipes 11 penetrate into the outer side of the reactor body 1 and are connected to a water supply device. By turning on the two electric push rods 2, the hollow block 3 can be driven to move longitudinally back and forth in the inner cavity of the reactor body 1. At this time, water is delivered to the connecting pipe 11 through the external water supply device, and then the water is delivered to the hollow block 3 through the connecting pipe 11 and dispersed to the multiple nozzles 4 for spraying, so that the sprayed water can clean the inner wall of the reactor body 1.

[0029] A ring block 5 is slidably provided on the periphery of the hollow block 3. A brush 6 for cleaning methyl acetoacetate is adhered to the periphery of the ring block 5. The brush 6 is attached to the inner wall of the reactor body 1. When the hollow block 3 moves longitudinally back and forth, it will drive the ring block 5 to move longitudinally back and forth simultaneously, so that the brush 6 can clean the inner wall of the reactor body 1. In conjunction with the water spray from the nozzle 4, the cleaning effect of the reactor body 1 can be improved, and the residue left behind can be prevented from affecting the preparation of methyl acetoacetate in the next batch, thereby improving the quality of methyl acetoacetate preparation.

[0030] A limiting groove 12 is provided on the periphery of the hollow block 3. The lower half of the hollow block 3 is solid, so the limiting groove 12 is located on the periphery of the solid area. A limiting block 13 is welded to the inner wall of the annular block 5. The limiting block 13 is slidably located on the periphery of the limiting groove 12. Both the limiting block 12 and the limiting groove 13 are T-shaped. The setting of the limiting groove 12 and the limiting block 13 can ensure that the annular block 5 can always be located on the periphery of the hollow block 3, so that the annular block 5 can follow the hollow block 3 to perform longitudinal reciprocating motion and can also rotate.

[0031] A drive motor 7 is installed on the bottom surface of the reactor body 1. The output end of the drive motor 7 passes through the reactor body 1 and is connected to a rotating plate 8. Two rhomboid blocks 9 are symmetrically welded to the top surface of the rotating plate 8. The top surface of the annular block 5 is symmetrically provided with rhomboid grooves 10 for the rhomboid blocks 9 to pass through. When the hollow block 3 drives the annular block 5 to perform longitudinal reciprocating motion, the drive motor 7 is turned on, which drives the rotating plate 8 to rotate, thereby driving the two rhomboid blocks 9 to rotate. Since the two rhomboid blocks 9 pass through the two rhomboid grooves 10 respectively, when the annular block 5 performs longitudinal reciprocating motion, the two rhomboid grooves 10 will perform longitudinal reciprocating motion on the periphery of the two rhomboid blocks 9 respectively. Thus, when the two rhomboid blocks 9 rotate, they will drive the annular block 5 to rotate through the two rhomboid grooves 10, thereby allowing the annular block 5 to rotate on the periphery of the hollow block 3, thereby improving the cleaning effect of the brush 6 on the inner wall of the reactor body 1.

[0032] An annular plate 14 is installed on the inner wall of the reactor body 1. A groove 15 is opened on the inner wall of the annular plate 14. A slider 16 is welded to the top of each of the two rhomboid blocks 9. The two sliders 16 are slidably adapted to the groove 15. When the rotating plate 8 drives the two rhomboid blocks 9 to perform circular motion, the two rhomboid blocks 9 will drive the two sliders 16 to perform circular motion in the inner cavity of the groove 15, so that the annular plate 14, the groove 15 and the sliders 16 support the position of the rhomboid blocks 9 and prevent the rhomboid blocks 9 from bending.

[0033] A rotary motor 17 is installed on the top surface of the reactor body 1. The output end of the rotary motor 17 passes through the reactor body 1 and is connected to a rotating rod 18. Several mixing rods 19 for continuous flow synthesis of methyl acetoacetate are installed at equal intervals around the rotating rod 18. By turning on the rotary motor 17, the rotating rod 18 can be driven to rotate, thereby driving the multiple mixing rods 19 to rotate, thereby mixing and configuring the raw materials of methyl acetoacetate.

[0034] Working principle:

[0035] In this continuous flow synthesis reactor for methyl acetoacetate, the required amount of methyl acetoacetate is fed into the reactor body 1 through the feed inlet. The rotary motor 17 is then turned on, which drives multiple mixing rods 19 to rotate via the rotating rod 18, thereby mixing the methyl acetoacetate raw materials. After mixing, the mixture is discharged from the reactor body 1 through the discharge outlet. If there are residual raw material residues on the inner wall of the reactor body 1, the electric push rod 2 is activated, causing the hollow block 3 to reciprocate longitudinally. At this time, water is supplied to the hollow block 3 through the connecting pipe 11 via an external water supply device. The water is dispersed and sprayed from multiple nozzles 4, allowing the sprayed water to clean the inner wall of the reactor body 1. At the same time, the drive motor 7 is turned on, which drives the two rhomboid blocks 9 to rotate through the rotating plate 8. The two rhomboid blocks 9 drive the annular block 5 to rotate through the two rhomboid grooves 10, which in turn drives the brush 6 to rotate. The brush 6 can clean the inner wall of the reactor body 1. Combined with the water spray from the nozzles 4, the cleaning effect of the reactor body 1 can be improved, and the residue left behind can be prevented from affecting the preparation of methyl acetoacetate in the next batch, thus improving the quality of the methyl acetoacetate preparation.

[0036] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A continuous flow synthesis reactor for methyl acetoacetate comprising a reactor body (1) characterised in that: The top surface of the reaction kettle body (1) is symmetrically provided with two electric push rods (2), the output ends of the two electric push rods (2) are both penetrated into the inner cavity of the reaction kettle body (1) and are commonly connected with a hollow block (3), a plurality of nozzles (4) for spraying water to clean methyl acetoacetate are equidistantly arranged on the circumferential side of the hollow block (3), the circumferential side of the hollow block (3) is slidably provided with an annular block (5), the circumferential side of the annular block (5) is adhered with a brush (6) for cleaning methyl acetoacetate, a driving motor (7) is arranged on the bottom surface of the reaction kettle body (1), the output end of the driving motor (7) is connected with a rotating plate (8) which is penetrated through the reaction kettle body (1), the top surface of the rotating plate (8) is symmetrically welded with two rhombic blocks (9), and the top surface of the annular block (5) is symmetrically provided with rhombic grooves (10) for the rhombic blocks (9) to pass through.

2. The continuous flow synthesis reactor for methyl acetoacetate according to claim 1, characterized in that: The top surface of the hollow block (3) is symmetrically communicated with connecting pipes (11), and the free ends of the two connecting pipes (11) are both penetrated to the outside of the reaction kettle body (1) and are externally connected with water supply equipment.

3. The continuous flow synthesis reactor for methyl acetoacetate according to claim 1, characterized in that: The circumferential side of the hollow block (3) is provided with a limiting groove (12), and the inner side wall of the annular block (5) is welded with a limiting block (13).

4. The continuous flow synthesis reactor for methyl acetoacetate according to claim 3, characterized in that: The limiting block (13) is slidably arranged on the circumferential side of the limiting groove (12), and the limiting block (13) and the limiting groove (12) are both arranged in T shape.

5. The continuous flow synthesis reactor for methyl acetoacetate according to claim 1, characterized in that: The inner side wall of the reaction kettle body (1) is provided with an annular plate (14), and the inner side wall of the annular plate (14) is provided with a sliding groove (15).

6. The continuous flow synthesis reactor for methyl acetoacetate according to claim 5, characterized in that: The top end of each of the two rhombic blocks (9) is welded with a sliding block (16), and the two sliding blocks (16) are both slidably matched with the sliding groove (15).

7. The continuous flow synthesis reactor for methyl acetoacetate according to claim 1, characterized in that: The top surface of the reaction kettle body (1) is provided with a rotating motor (17), the output end of the rotating motor (17) is connected with a rotating rod (18) which is penetrated through the reaction kettle body (1), and a plurality of mixing rods (19) for continuously flow synthesis of methyl acetoacetate are equidistantly arranged on the circumferential side of the rotating rod (18).

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