A condensation kettle for producing p-phenoxyphenyl ethyl lactate

Abstract

The utility model discloses a kind of p-hydroxyphenyl ethyl lactate production's condensation kettle, kettle body upper surface is provided with kettle cover, the center position of kettle cover upper surface is provided with motor by motor base, agitator rotation is set in kettle body, agitator includes stirring shaft, U-shaped paddle, orifice plate type paddle and oblique paddle, stirring shaft top end is connected with the output shaft of motor by coupling, stirring shaft bottom and U-shaped paddle middle position are connected, two orifice plate type paddles are symmetrically set in the direction perpendicular to U-shaped paddle on the both sides of stirring shaft, and orifice plate type paddle outer end two sides are connected with the reinforcement of U-shaped paddle two sides by two inclined-stayed reinforcing bars, and several oblique paddles are set between U-shaped paddle and stirring shaft, the utility model structure is reasonable, by three paddle structure, prevent precipitation, scatter solution, create strong convection and shear force, greatly increase the collision frequency of reactant molecule, and can prevent vortex on liquid surface, greatly improve reaction rate and mixing effect.

Description

Technical Field

[0001] This utility model relates to the field of condensation reactor technology, specifically a condensation reactor for the production of ethyl p-phenoxyphenyl lactate. Background Technology

[0002] ethyl p-phenoxyphenyl lactate is a major intermediate in the fungicide oxadiazon. The current processing steps include: condensation, hydrolysis, phase separation, extraction, oil phase merging, phase separation, solvent removal, and distillation to finally obtain ethyl p-phenoxyphenyl lactate. Condensation is typically performed in a condensation reactor.

[0003] Currently, the condensation reactors used in the production of ethyl p-phenoxyphenyl lactate are generally single-blade or double-blade structures. However, the stirring performance of the current double-blade reactors is limited, and they are generally submerged below the liquid level. In addition, the two blades are connected to the stirring shaft separately, and the stability needs to be improved. Therefore, there is an urgent need for an improved technology to solve this problem in the existing technology. Summary of the Invention

[0004] The purpose of this invention is to provide a condensation reactor for the production of ethyl p-phenoxyphenyl lactate, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a condensation reactor for the production of ethyl p-phenoxyphenyl lactate, comprising a reactor body, a reactor lid, a motor, and a stirrer; The upper surface of the vessel body is provided with a vessel lid, the upper surface of the vessel lid is provided with several feeding ports and drip ports, a motor is provided at the center of the upper surface of the vessel lid via a motor base, the vessel body is wrapped with a jacket, and the bottom of the vessel body is provided with a discharge port; The agitator is rotatably mounted inside the vessel. The agitator includes a stirring shaft, a U-shaped blade, a perforated plate blade, and inclined blades. The top of the stirring shaft is connected to the output shaft of the motor via a coupling. The bottom of the stirring shaft is connected to the middle of the U-shaped blade. Two perforated plate blades are symmetrically arranged on both sides of the stirring shaft in a direction perpendicular to the U-shaped blade. The outer ends of the perforated plate blades are reinforced to the sides of the U-shaped blade by two inclined reinforcing rods. Several inclined blades are arranged between the U-shaped blade and the stirring shaft.

[0006] Preferably, the present invention provides a condensation reactor for the production of ethyl p-phenoxyphenyl lactate, wherein the bottom of the jacket is provided with a heat exchange medium inlet, one side of the upper part of the jacket is provided with a heat exchange medium outlet, and a plurality of support seats are provided on the outer surface of the jacket.

[0007] Preferably, the present invention provides a condensation reactor for the production of ethyl p-phenoxyphenyl lactate, wherein the upper surface of the reactor lid is further provided with an air inlet, an exhaust outlet, a pressure relief valve, a manhole, a thermometer port, and a pressure gauge port.

[0008] Preferably, the present invention provides a condensation reactor for the production of ethyl p-phenoxyphenyl lactate, wherein the perforated plate-type impeller is densely covered with through holes.

[0009] Compared with the prior art, the beneficial effects of this utility model are: (1) The stirrer consists of a stirring shaft, U-shaped blades, perforated blades and inclined blades. The bottom is stirred by U-shaped blades and inclined blades, and the liquid surface is stirred by perforated blades. The three-blade structure prevents precipitation and dispersing of the solution, creates strong convection and shear force, greatly increases the collision frequency of reactant molecules, and prevents vortices from forming on the liquid surface, thus greatly improving the reaction rate and mixing effect.

[0010] (2) The two sides of the outer end of the perforated blade are reinforced and connected to the two sides of the U-shaped blade by two diagonal bracing rods, which ensures the connection strength between the U-shaped blade and the perforated blade, thereby ensuring the structural strength of the perforated blade and improving its service life. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the agitator structure; Figure 3 The attached diagram shows a top view of the internal structure.

[0012] In the diagram: 1. Vessel body; 2. Vessel cover; 3. Motor; 4. Feed port; 5. Drop port; 6. Motor base; 7. Jacket; 8. Discharge port; 9. Stirring shaft; 10. U-shaped impeller; 11. Orifice plate impeller; 12. Inclined impeller; 13. Inclined reinforcing rod; 14. Heat exchange medium inlet; 15. Heat exchange medium outlet; 16. Support base; 17. Air inlet; 18. Exhaust port; 19. Pressure relief valve; 20. Manhole; 21. Thermometer port; 22. Pressure gauge port. Detailed Implementation

[0013] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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 this utility model.

[0014] Please see Figure 1-3 This utility model provides a technical solution: a condensation kettle for the production of ethyl p-phenoxyphenyl lactate, comprising a kettle body 1, a kettle cover 2, a motor 3, and a stirrer; The upper surface of the vessel body 1 is provided with a vessel cover 2. The upper surface of the vessel cover 2 is provided with several feeding ports 4 and drip ports 5. The upper surface of the vessel cover 2 is also provided with an air inlet 17, an exhaust port 18, a pressure relief valve 19, a manhole 20, a thermometer port 21, and a pressure gauge port 22. The air inlet 17 is used to introduce inert gases such as nitrogen to replace the oxygen inside the vessel body 1. The exhaust port 18 is used to discharge air. The pressure relief valve 19 is used to relieve pressure when the internal pressure is too high, ensuring safe installation and production. The manhole 20 is used for personnel to enter and exit the vessel body. 1. It is used to clean the inside of the vessel body 1. A motor 3 is installed at the center of the upper surface of the vessel cover 2 through the motor base 6. The vessel body 1 is wrapped with a jacket 7. A heat exchange medium inlet 14 is provided at the bottom of the jacket 7. A heat exchange medium outlet 15 is provided on one side of the upper part of the jacket 7. Several support seats 16 are provided on the outer surface of the jacket 7. The heat exchange medium enters and leaves the jacket 7 through the heat exchange medium inlet 14 and the heat exchange medium outlet 15, thereby realizing heat exchange inside the vessel body 1. A discharge port 8 is provided at the bottom of the vessel body 1. The agitator is rotatably installed inside the vessel body 1. The agitator includes a stirring shaft 9, a U-shaped blade 10, a perforated blade 11, and inclined blades 12. The top of the stirring shaft 9 is connected to the output shaft of the motor 3 via a coupling. The bottom of the stirring shaft 9 is connected to the middle position of the U-shaped blade 10. Two perforated blades 11 are symmetrically arranged on both sides of the stirring shaft 9 in a direction perpendicular to the U-shaped blade 10. The perforated blades 11 are densely covered with through holes, so that the perforated blades 11 can disperse materials during stirring and improve the reaction effect. The outer ends of the perforated blades 11 are reinforced to the two sides of the U-shaped blade 10 by two inclined reinforcing rods 13. Several inclined blades 12 are arranged between the U-shaped blade 10 and the stirring shaft 9. The inclined blades 12 improve the mixing effect and increase the structural strength between the U-shaped blade 10 and the stirring shaft 9.

[0015] Installation method and operating principle: First, assemble the agitator. Weld the middle position of the U-shaped blade 10 to the bottom end of the agitator shaft 9. Then, weld the inclined blade 12 obliquely between the agitator shaft 9 and both sides of the U-shaped blade 10. Next, weld the two perforated blades 11 to both sides of the agitator shaft 9, ensuring that the directions of the perforated blades 11 and the U-shaped blade 10 are perpendicular to each other. Then, reinforce the outer ends of the perforated blades 11 by welding them to both sides of the U-shaped blade 10 with inclined reinforcing rods 13, completing the agitator assembly. Connect the top end of the agitator shaft 9 to the output shaft of the motor 3 via a coupling. The motor 3 is mounted on the motor base 6 on the upper surface of the vessel cover 2. Lift the vessel cover 2 and place the agitator inside the vessel body 1. Weld the connection between the vessel cover 2 and the vessel body 1 to complete the installation. In use, nitrogen gas is first introduced through the air inlet 17, and low-temperature water is introduced into the jacket 7. The temperature inside the vessel 1 is controlled at 0~5℃. Aluminum trichloride is first added into the vessel 1 through the feed inlet. Then, ethyl pyruvate and dichloromethane (as solvent) are added into the vessel 1 through the feed inlet. The motor 3 is started, and the motor 3 drives the stirrer to rotate. The materials are stirred by the cooperation of the U-shaped blade 10, the perforated blade 11 and the inclined blade 12. Then, diphenyl ether is slowly added into the vessel 1 through the dropper 5. After the addition is completed, room temperature water at 20~25℃ is introduced into the jacket 7 to raise the internal temperature of the vessel 1 to room temperature. Stirring is continued at this temperature for 6~12 hours. After the reaction is complete, a reaction solution is obtained. The reaction solution is then hydrolyzed, the aqueous phase is separated and the solvent is removed to obtain the intermediate p-phenoxyphenyl lactate. This utility model has a reasonable structure. The stirrer consists of a stirring shaft 9, a U-shaped blade 10, a perforated blade 11, and an inclined blade 12. The bottom is stirred by the U-shaped blade 10 and the inclined blade 12, while the liquid surface is stirred by the perforated blade 11. The three-blade structure prevents sedimentation and dispersing of the solution, creates strong convection and shear force, greatly increases the collision frequency of reactant molecules, and prevents vortices from forming on the liquid surface, thus greatly improving the reaction rate and mixing effect. At the same time, the outer ends of the perforated blade 11 are reinforced and connected to the two sides of the U-shaped blade 10 by two inclined reinforcing rods 13, ensuring the connection strength between the U-shaped blade 10 and the perforated blade 11, thereby ensuring the structural strength of the perforated blade 11 and improving its service life.

[0016] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0017] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A condensation reactor for the production of ethyl p-phenoxyphenyl lactate, characterized in that: Includes a vessel body (1), a vessel lid (2), a motor (3), and a stirrer; The upper surface of the vessel body (1) is provided with a vessel lid (2), the upper surface of the vessel lid (2) is provided with several feeding ports (4) and drip ports (5), a motor (3) is provided at the center of the upper surface of the vessel lid (2) through a motor base (6), the vessel body (1) is wrapped with a jacket (7), and the bottom of the vessel body (1) is provided with a discharge port (8). The agitator is rotatably installed inside the vessel body (1). The agitator includes a stirring shaft (9), a U-shaped blade (10), a perforated blade (11), and inclined blades (12). The top of the stirring shaft (9) is connected to the output shaft of the motor (3) through a coupling. The bottom of the stirring shaft (9) is connected to the middle position of the U-shaped blade (10). Two perforated blades (11) are symmetrically arranged on both sides of the stirring shaft (9) in a direction perpendicular to the U-shaped blade (10). The outer ends of the perforated blades (11) are reinforced to the two sides of the U-shaped blades (10) through two inclined reinforcing rods (13). Several inclined blades (12) are arranged between the U-shaped blades (10) and the stirring shaft (9).

2. The condensation reactor for producing ethyl p-phenoxyphenyl lactate according to claim 1, characterized in that: The jacket (7) has a heat exchange medium inlet (14) at the bottom and a heat exchange medium outlet (15) on one side of the upper part. Several support seats (16) are provided on the outer surface of the jacket (7).

3. The condensation reactor for producing ethyl p-phenoxyphenyl lactate according to claim 1, characterized in that: The upper surface of the vessel lid (2) is also provided with an air inlet (17), an exhaust outlet (18), a pressure relief valve (19), a manhole (20), a thermometer port (21), and a pressure gauge port (22).

4. The condensation reactor for producing ethyl p-phenoxyphenyl lactate according to claim 1, characterized in that: The perforated blade (11) is densely covered with through holes.

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