Process and apparatus for the continuous esterification of olefins in microchannels

Abstract

This invention discloses a continuous esterification production method and equipment for olefins using microchannels, comprising a reaction section and a discharge section. The reaction section includes microchannels and a heat exchange jacket. The discharge section includes a piston cylinder, a piston, a control plate, and a shell. A vaporization chamber is vertically arranged inside the piston cylinder. A first liquid outlet channel communicating with the microchannels is provided on the shell. A second and third liquid outlet channels are provided at the lower part of the piston cylinder, with the second liquid outlet channel located above the third liquid outlet channel. A guide port connecting the first and second liquid outlet channels is provided on the control plate. The piston is located at the lower part of the vaporization chamber and slides up and down to close or open the third liquid outlet channel. A suction pipe is provided at the top of the vaporization chamber. This invention introduces microchannels into the existing olefin carbonylation method for producing lipids using carbon monoxide, resulting in better temperature control, reduced esterification byproducts, and continuous and stable production.

Description

Technical Field

[0001] This invention relates to the field of microchannel reaction technology, and in particular to a method and equipment for continuous esterification production of olefins via microchannels. Background Technology

[0002] Ester compounds are widely found in all aspects of production and daily life, including pesticides, pharmaceuticals, materials, food chemistry, and fragrances. They are also extremely important chemical raw materials. Therefore, the efficient synthesis of ester compounds has great research value.

[0003] Patent CN108003022B discloses a method for preparing ester compounds. This method involves adding alcohols, olefins, and a ruthenium-supported metal oxide catalyst to a pressure vessel. The alcohols serve as both solvent and raw material. Carbon monoxide is introduced, the vessel is sealed, stirred, and the reaction is carried out at a temperature ≥130℃ for ≥2 hours to synthesize esters. In this traditional Reppe carbonylation method for producing esters, synthesis is typically conducted in a pressure reactor. Reaction efficiency depends on macroscopic stirring, resulting in long intermolecular diffusion distances, relatively low mixing efficiency, and slow heat transfer, which can easily lead to localized overheating, causing side reactions and affecting product selectivity and yield. Using a traditional microchannel reactor avoids localized overheating and reduces side reactions, making it a superior choice. However, current microchannel reactors are continuous atmospheric pressure reactors and cannot handle reactants containing high-pressure gas (carbon monoxide). Products exiting the microchannel reaction end are rapidly ejected under the influence of the internal high-pressure gas, disrupting stable continuous production and causing incomplete product synthesis, ultimately leading to synthesis failure.

[0004] Therefore, how to achieve continuous production of lipids through Reppe carbonylation is a major challenge in this research. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a method and equipment for continuous esterification production of olefins via microchannels, so as to solve the problem that existing atmospheric pressure microchannel reactors cannot stably handle high-pressure reaction liquids.

[0006] The objective of this invention is achieved through the following technical solution: a continuous esterification production device for olefins via microchannels, comprising a reaction section and a discharge section. The reaction section includes a microchannel and a heat exchange jacket. The discharge section includes a piston cylinder, a piston, a control plate, and a housing. The piston cylinder and the housing are concentrically arranged. A vaporization chamber is vertically arranged inside the piston cylinder. A first liquid outlet channel communicating with the microchannel is provided on the housing. A second liquid outlet channel and a third liquid outlet channel are provided at the lower part of the piston cylinder. The second liquid outlet channel is located above the third liquid outlet channel. The control plate is located between the housing and the piston cylinder and is slidably sealed to both. The control plate is provided with a guide port communicating with the first liquid outlet channel and the second liquid outlet channel. The piston is located at the lower part of the vaporization chamber. The piston slides up and down to close or open the third liquid outlet channel. A suction pipe is provided at the top of the vaporization chamber.

[0007] Preferably, there are at least four vaporization chambers, which are evenly distributed around the piston cylinder axis. The first liquid outlet channel, the second liquid outlet channel, the third liquid outlet channel, the piston, and the suction pipe are all matched with the number of vaporization chambers. The piston is arranged circumferentially according to the reciprocating phase.

[0008] Preferably, the housing has a drive plate that is inclined relative to the piston cylinder center. The drive plate is located below the piston cylinder center. The drive plate has an annular mounting cavity inside. A piston rod is fixedly mounted on the piston. A ball is provided at the end of the piston rod. The upper surface of the drive plate has an annular groove that matches the piston rod. The housing has a motor. The output end of the motor is vertically fixed to the center of the drive plate.

[0009] Preferably, the control board has a cylindrical structure and is fixedly connected to the drive board. When the control board connects the first liquid outlet channel and the second liquid outlet channel, the corresponding piston in the vaporization chamber is located at the highest point of the reciprocating phase.

[0010] Preferably, the vaporization chamber is divided into an upper vaporization chamber and a lower liquid storage chamber, and the liquid storage chamber is filled with a reaction liquid.

[0011] Preferably, the piston cylinder has a drainage chamber inside, the drainage chamber is not higher than the third liquid outlet channel, the drainage chamber is connected to all the third liquid outlet channels, and the lower part of the drainage chamber is provided with a drainage pipe.

[0012] Preferably, the drainage chamber has a cylindrical structure, the drainage pipe is horizontally connected to the lower part of the drainage chamber, the drainage chamber is provided with a sealing plate for sealing the exhaust pipe and a rotating shaft, the number of sealing plates matches the number of vaporization chambers, one end of the rotating shaft is fixedly connected to the sealing plate, the other end of the rotating shaft passes through the drainage chamber and is fixedly connected to the drive plate, and the rotating shaft and the drainage chamber are rotatably sealed together.

[0013] Preferably, a high-pressure gas pipe is provided inside the piston cylinder, and a conversion plate is provided inside the drainage chamber. The conversion plate has arc-shaped air guide holes, which are evenly spaced around the perimeter. The conversion plate is in close contact with the top surface of the drainage chamber. The rotating shaft is fixedly connected to the center of the conversion plate, and the sealing plate is fixedly connected to the conversion plate. The rotation of the conversion plate causes the high-pressure gas pipe to alternately pass through the air guide holes to connect to the drainage chamber. The vaporization chamber opens to the drainage chamber, while the conversion plate blocks the high-pressure gas pipe and the sealing plate blocks the drainage pipe.

[0014] Preferably, the outer shell is provided with a flow guide cavity communicating with the first liquid outlet channel, and the flow guide cavity is provided with a liquid inlet that matches the microchannel.

[0015] A method for continuous esterification production of olefins via microchannels includes the following steps. S1. A mixture of alcohols, olefins, catalysts, and carbon monoxide is introduced into a microchannel for a high-temperature, high-pressure reaction. S2. The liquid discharged from the microchannel is intermittently introduced into the low-pressure vaporization chamber, and carbon monoxide gas overflows from the inside of the liquid. The low-pressure carbon monoxide gas pushes part of the reaction liquid out of the vaporization chamber. S3. Carbon monoxide gas in the vaporization chamber is extracted by a vacuum pump and circulated back into the microchannel for reaction. This invention has the following advantages: 1. A microchannel continuous esterification production equipment for olefins is provided. The microchannel reactor can adapt to the high-pressure environment required for carbon monoxide in the olefin esterification process, ensuring the high temperature and high pressure conditions of the reaction, so that the reaction liquid flows stably and slowly in the microchannel, and the esterification production can be carried out continuously and in large batches. 2. By coordinating the control panel, vaporization chamber and piston, not only can the overflowing carbon monoxide gas be recovered and reused, but the high-pressure environment in the microchannel can also be reduced by gradient, making the discharge slower and more stable. 3. By coordinating the control board and the drive board, the four pistons alternately perform four-phase linkage, which reduces the fluctuation of the liquid discharged from the microchannel and makes the continuous discharge more stable. 4. This invention solves the shortcomings of traditional batch reactors by designing a unique high-pressure microchannel reactor, resulting in better temperature control, fewer by-products, and continuous production under high pressure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the reaction section of the present invention; Figure 3 This is a half-sectional structural diagram of the discharge section of the present invention; Figure 4 This is a schematic diagram of the internal structure of the discharge section of the present invention; Figure 5 This is a schematic diagram of the internal structure of the drainage chamber of the present invention.

[0017] In the diagram, 1. Microchannel; 2. Heat exchange jacket; 3. Shell; 4. Flow guide cavity; 5. Liquid inlet; 6. Motor; 7. Piston cylinder; 8. Vaporization chamber; 9. Control board; 10. Piston; 11. First liquid outlet channel; 12. Through port; 13. Second liquid outlet channel; 14. Third liquid outlet channel; 15. Drainage chamber; 16. Drainage pipe; 17. Air extraction pipe; 18. Drive board; 19. Mounting cavity; 20. Sphere; 21. Annular groove; 22. Liquid storage chamber; 23. Vaporization chamber; 24. High-pressure gas pipe; 25. Conversion plate; 26. Air guide hole; 27. Sealing plate; 28. Rotating shaft; 29. ​​Piston rod. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] like Figure 1 , Figure 2 As shown, an olefin microchannel continuous esterification production device includes a reaction section with a tubular or microchannel structure and a continuous discharge section installed at the end of the reaction section. The reaction section includes a microchannel 1 and a heat exchange jacket 2. The microchannel 1 is a bent tubular structure to improve the gas-liquid mixing effect. like Figure 3As shown, the discharge section includes a piston cylinder core 7, four pistons 10, a control plate 9, a housing 3, a motor 6, and a guide cavity 4. The housing 3 has four first liquid outlet channels 11, which are connected to the guide cavity 4. The guide cavity 4 has a liquid inlet 5 that matches the flange at the end of the microchannel 1. The control plate 9 is a cylindrical structure, and the piston cylinder core 7 is a cylindrical structure. The control plate 9 is located between the housing 3 and the piston cylinder core 7. The piston cylinder core 7, the control plate 9, and the housing 3 are coaxially arranged and tightly connected by a rotary seal. The piston cylinder core 7 has four vertically arranged vaporization chambers 8, which are evenly distributed around each other. Each piston cylinder core 7 has a second liquid outlet channel 13 and a third liquid outlet channel 14 at its lower part. The second liquid outlet channel 13 is located at the third liquid outlet channel 14. Above, the control panel 9 is provided with a guide port 12 that connects the first liquid outlet channel 11 and the second liquid outlet channel 13. There is one guide port 12. Rotating the control panel 9 can connect the guide port 2 to different first liquid outlet channels 11 and second liquid outlet channels 13 respectively. The piston 10 is located at the lower part of the vaporization chamber 8. The piston 10 slides up and down within the vaporization chamber 8. When the piston 10 slides up to the highest point, it cannot block the second liquid outlet channel 13. The piston 10 slides up and down to close or open the third liquid outlet channel 14. A suction pipe 17 is installed at the top of each vaporization chamber 8. The suction pipe 17 is connected to an air compressor. The air compressor extracts the gas in the vaporization chamber 8 to reduce the internal air pressure, maintain a low-pressure environment but still greater than the normal external air pressure, and retain some pressure to discharge the liquid at the bottom.

[0021] The vaporization chamber 8 is evenly distributed around the axis of the piston cylinder 7. Each first liquid outlet channel 11, second liquid outlet channel 13, third liquid outlet channel 14, piston 10, and suction pipe 17 are grouped with the vaporization chamber 8, forming a total of 4 evenly distributed groups. The pistons 10 are arranged circumferentially according to the reciprocating phase. In the circumferential distribution, the first piston reaches the highest point phase and blocks the third liquid outlet channel 14. The second piston reaches the middle point phase and also blocks the third liquid outlet channel 14. The third piston reaches the lowest point phase and opens the third liquid outlet channel 14. The fourth piston reaches the middle point phase and also blocks the third liquid outlet channel 14. Each piston 10 alternately reaches 4 phases in the vaporization chamber.

[0022] To enable the four pistons 10 to alternate in four phases, a drive plate 18 inclined relative to the piston cylinder core 7 is installed inside the housing 3. The drive plate 18 is located below the piston cylinder core 7 and has an annular mounting cavity 19 inside. A piston rod 29 is fixedly mounted on the lower surface of the piston 10, and a ball 20 is fixedly mounted at the end of the piston rod 29. An annular groove 21 matching the piston rod 29 is provided on the upper surface of the drive plate 18. The annular groove 21 is elliptical, and the ball 20 is located in the mounting cavity 19 to prevent the piston rod 29 from disengaging. A motor 6 is installed at the lower part of the housing 3, and the output end of the motor 6 is vertically fixed to the center of the drive plate 18, driving the drive plate 18 to rotate, thereby causing the piston rod 29 to move up and down. Its structure is similar to that of a plunger hydraulic motor, but there are still significant differences.

[0023] The bottom of the control board 9 is fixedly connected to the drive board 18, so that a motor can synchronously drive the rotation of the control board 9 and the drive board 18. When the control board 9 opens the first liquid outlet channel 11 and the second liquid outlet channel 13, the corresponding piston 10 in the vaporization chamber 8 is located at the highest point of the reciprocating phase, that is, the rotating opening 12 is directly facing the piston 10 at the highest point of the reciprocating phase. At this time, the first liquid outlet channel 11 and the second liquid outlet channel 13 corresponding to the other pistons 10 are blocked by the control board 9 to prevent liquid flow.

[0024] like Figure 3 As shown, the length of the vaporization chamber 8 is much greater than the sliding length of the piston 10. The vaporization chamber 8 is divided into an upper vaporization chamber 23 and a lower liquid storage chamber 22. The liquid storage chamber 22 is filled with reaction liquid. When the reaction liquid pressure of 0.1 MPa to 10 MPa is ejected from the second liquid outlet channel 13, it will directly impact the inner wall of the vaporization chamber 8, causing serious damage. By pre-filling a portion of solvent into the liquid storage chamber 22, the water column impacts the water, thus avoiding direct impact that could cause serious problems.

[0025] Four third liquid outlet channels 14 face the piston cylinder core 7, and a liquid discharge chamber 15 is opened through the center of the piston cylinder core 7. The liquid discharge chamber 15 is not higher than the third liquid outlet channels 14. All the liquid discharge chambers 15 are connected to all the third liquid outlet channels 14. A liquid discharge pipe 16 is provided at the lower part of the liquid discharge chamber 15, and the liquid inside is discharged through the liquid discharge pipe 16.

[0026] like Figure 4 , Figure 5As shown, the drainage chamber 15 has a cylindrical structure. The drainage pipe 16 is horizontally connected to the lower part of the drainage chamber 15. The drainage chamber 15 is equipped with a sealing plate 27 for sealing the exhaust pipe, a rotating shaft 28, and a conversion plate 25. The conversion plate 25 has four arc-shaped air guide holes 26, which are evenly spaced around the perimeter. The conversion plate 25 is in close contact with the top surface of the drainage chamber 15. The top end of the rotating shaft 28 is fixedly connected to the center of the conversion plate 25, and the other end of the rotating shaft 28 passes through the drainage chamber 15 and is fixedly connected to the drive plate 18. The rotating shaft 28 and the drainage chamber 15 are rotatably sealed. The upper end of the sealing plate 27 is fixedly connected to the conversion plate 25. The piston cylinder core 7 is equipped with an eccentric high-pressure air pipe 24, which is directly facing the air guide holes 26. After the conversion plate 25 rotates at a certain angle, the high-pressure air pipe 24 is directly facing the rotating plate 25, so that the rotating plate 25 seals the high-pressure air pipe 24, so that the high-pressure air is continuously released during the rotation of the conversion plate 25. Pipe 24 alternately connects to drain chamber 15 through air guide hole 26. There are 4 sealing plates 27. When vaporization chamber 8 connects to drain chamber 15, at the same time, conversion plate 25 blocks high-pressure gas pipe 24 and sealing plate 27 blocks drain pipe 16. The space of drain chamber 15 is equal to the reaction liquid intermittently sprayed from the second liquid outlet channel 14, so that the liquid in storage chamber 22 cannot all enter drain chamber 15, avoiding water flow impact damage caused by the liquid-free cavity in storage chamber 22. When the sealing plate 27 rotates to no longer block drain pipe 16, piston 10 will move upward to block the third liquid outlet channel 14. High-pressure gas pipe 24 connects to drain chamber 14 through air guide hole 26. High-pressure gas sprayed from high-pressure gas pipe 24 pushes the internal liquid out of drain pipe 16. By controlling the gas sprayed from high-pressure gas pipe 24 within the conversion time, the amount of liquid sprayed can be controlled, thereby controlling the amount of liquid stored in storage chamber 22.

[0027] Working principle: First, solvent is poured into the vaporization chamber 8 through the suction pipe 17. Then, an air compressor is connected to introduce the esterification reaction raw materials and carbon dioxide gas into the microchannel 1 for reaction. The reaction liquid in the microchannel 1 finally enters the guide chamber 4 through the liquid inlet 5. The motor 6 rotates, driving the control board 9 and the drive board 18 to rotate. When the control board 9 rotates to the guide port 12, it connects the first liquid outlet channel 11 and the second liquid outlet channel 13. The liquid in the guide chamber 4 enters the vaporization chamber 8 through the first liquid outlet channel 11, the guide port 12, and the second liquid outlet channel 13 in sequence. The reaction liquid impacts the solvent in the storage chamber. Since the gas pressure in the vaporization chamber 8 is much lower than the gas pressure in the microchannel 1, the carbon dioxide gas dissolved in the reaction liquid overflows from the liquid into the vaporization chamber 23 and is discharged from the suction pipe 17. The reaction liquid and solvent push up the liquid volume in the storage chamber 22. At this time, the piston 10 corresponds to the highest phase. After the control board 9 and the drive board 18 rotate for two phases, the control board 9 will block the first liquid outlet channel 11 and the second liquid outlet channel 13. In the liquid channel 13, the piston 10 slides downward to the lowest phase, opening the third liquid storage channel 14. Under high pressure, the liquid in the storage chamber 22 enters the discharge chamber 15. At this time, the sealing plate 27 and the switching plate 25 respectively seal the discharge pipe 16 and the high-pressure gas pipe 24. Rotating to the next phase, the piston 10 moves upward to close the third liquid outlet channel 14, the sealing plate 27 opens the discharge pipe 16, and the switching plate 25 rotates to allow the high-pressure gas pipe 24 to connect to the discharge port 26. High-pressure gas in cavity 15 and high-pressure gas pipe 24 discharges the liquid inside the discharge cavity 15 from the discharge pipe 16. The above describes the movement mode corresponding to a single vaporization cavity 8. The four vaporization cavities 8 in the piston cylinder 7 correspond to four different phases of the piston 10. Under the rotation of the drive plate 18, they alternately vaporize and discharge liquid, realizing uniform and stable discharge of liquid from the microchannel 1 under high pressure conditions, so that the reaction is continuously generated. By further increasing the number of vaporization cavities 8 and other matching structures, the discharge will be more continuous and stable.

[0028] A method for continuous esterification production of olefins via microchannels includes the following steps. S1. A mixture of alcohol, olefin, catalyst and carbon monoxide is introduced into microchannel 1 for a high-temperature and high-pressure reaction; S2. The liquid discharged from the microchannel 1 is intermittently introduced into the low-pressure vaporization chamber 8. Carbon monoxide gas overflows from the liquid. At the same time, the low-pressure carbon monoxide gas pushes part of the reaction liquid into the vaporization chamber 8. The liquid in the vaporization chamber 8 enters the drain chamber 15. After a certain period of time, the reaction liquid is discharged under the action of high-pressure gas. S3. The carbon monoxide gas in the vaporization chamber 8 is extracted by the vacuum pump and circulated into the microchannel 1 for excess reaction.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A microchannel continuous esterification production device for olefins, characterized in that, The system includes a reaction section and a discharge section. The reaction section includes a microchannel (1) and a heat exchange jacket (2). The discharge section includes a piston cylinder (7), a piston (10), a control plate (9), and a housing (3). The piston cylinder (7) and the housing (3) are concentrically arranged. A vaporization chamber (8) is vertically provided inside the piston cylinder (7). The housing (3) has a first liquid outlet channel (11) communicating with the microchannel (1). The lower part of the piston cylinder (7) has a second liquid outlet channel (13) and a third liquid outlet channel (14). The second liquid outlet... The channel (13) is located above the third liquid outlet channel (14). The control plate (9) is located between the housing (3) and the piston cylinder (7) and is slidably sealed to both. The control plate (9) is provided with a guide port (12) that connects the first liquid outlet channel (11) and the second liquid outlet channel (13). The piston (10) is located at the lower part of the vaporization chamber (8). The piston (10) slides up and down to close or open the third liquid outlet channel (14). The top of the vaporization chamber (8) is provided with a suction pipe (17).

2. The olefin microchannel continuous esterification production equipment according to claim 1, characterized in that: There are at least four vaporization chambers (8). The vaporization chambers (8) are evenly distributed around the axis of the piston cylinder (7). The first liquid outlet channel (11), the second liquid outlet channel (13), the third liquid outlet channel (14), the piston (10), and the suction pipe (17) are all matched with the number of vaporization chambers (8). The piston (10) is arranged circumferentially according to the reciprocating phase.

3. The olefin microchannel continuous esterification production equipment according to claim 2, characterized in that: The housing (3) has a drive plate (18) that is inclined relative to the piston cylinder (7) inside. The drive plate (18) is located below the piston cylinder (7). The drive plate (18) has an annular mounting cavity (19) inside. The piston (10) has a piston rod (29) fixedly mounted on it. The end of the piston rod (29) has a ball (20). The upper surface of the drive plate (18) has an annular groove (21) that matches the piston rod (29). The housing (3) has a motor (6) mounted on it. The output end of the motor (6) is vertically fixed to the center of the drive plate (18).

4. The olefin microchannel continuous esterification production equipment according to claim 3, characterized in that: The control plate (9) is a cylindrical structure. The control plate (9) is fixedly connected to the drive plate (18). When the control plate (9) connects the first liquid outlet channel (11) and the second liquid outlet channel (13), the piston (10) in the vaporization chamber (8) is located at the highest point of the reciprocating phase.

5. The olefin microchannel continuous esterification production equipment according to claim 4, characterized in that: The vaporization chamber (8) is divided into an upper vaporization chamber (23) and a lower liquid storage chamber (22), and the liquid storage chamber (22) is filled with reaction liquid.

6. The olefin microchannel continuous esterification production equipment according to claim 5, characterized in that: The piston cylinder core (7) is provided with a drain chamber (15), the drain chamber (15) is not higher than the third liquid outlet channel (14), the drain chamber (15) is connected to all the third liquid outlet channels (14), and the lower part of the drain chamber (15) is provided with a drain pipe (16).

7. The method and equipment for continuous esterification production of olefins via microchannels according to claim 6, characterized in that: The drain chamber (15) is a cylindrical structure. The drain pipe (16) is horizontally connected to the lower part of the drain chamber (15). The drain chamber (15) is provided with a sealing plate (27) for sealing the exhaust pipe and a rotating shaft (28). The number of sealing plates (27) matches the number of vaporization chambers (8). One end of the rotating shaft (28) is fixedly connected to the sealing plate (27). The other end of the rotating shaft (28) passes through the drain chamber (15) and is fixedly connected to the drive plate (18). The rotating shaft (28) and the drain chamber (15) are rotatably sealed together.

8. The olefin microchannel continuous esterification production equipment according to claim 7, characterized in that: The piston cylinder core (7) is provided with a high-pressure gas pipe (24), the drain chamber (15) is provided with a conversion plate (25), the conversion plate (25) is provided with an arc-shaped air guide hole (26), the air guide hole (26) is arranged evenly around the perimeter, the conversion plate (25) is close to the top surface of the drain chamber (15), the rotating shaft (28) is fixedly connected to the center of the conversion plate (25), the sealing plate (27) is fixedly connected to the conversion plate (25), the conversion plate (25) rotates so that the high-pressure gas pipe (24) alternately passes through the air guide hole (26) to connect to the drain chamber (15), the vaporization chamber (8) connects to the drain chamber (15), and at the same time the conversion plate (25) blocks the high-pressure gas pipe (24) and the sealing plate (27) blocks the drain pipe (16).

9. The olefin microchannel continuous esterification production equipment according to claim 2, characterized in that: The outer shell (3) is provided with a flow guide cavity (4) that communicates with the first liquid outlet channel (11), and the flow guide cavity (4) is provided with a liquid inlet (5) that matches the microchannel (1).

10. A method for continuous esterification production of olefins via microchannels, based on the equipment described in any one of claims 1-9, characterized in that, Includes the following steps, S1. A mixture of alcohols, olefins, catalysts and carbon monoxide is introduced into a microchannel (1) for a high-temperature and high-pressure reaction; S2. The liquid discharged from the microchannel (1) is intermittently introduced into the low-pressure vaporization chamber (8), and carbon monoxide gas overflows from the inside of the liquid. The low-pressure carbon monoxide gas pushes part of the reaction liquid out of the vaporization chamber (8). S3. The carbon monoxide gas in the vaporization chamber (8) is extracted by the vacuum pump and circulated into the microchannel (1) for reaction.

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