Rectifying kettle for producing diethyl phenylethylmalonate
By using orifice plates and stirring rod structures in the still kettle, the contact area between steam and liquid is enhanced, and the problem of low gas-liquid separation efficiency in the prior art is solved, and a more efficient production of diethyl phenylethylmalonate is achieved.
Patent Information
- Application Number
- CN202422444073.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-10
AI Technical Summary
In the production process of phenylethylmalonate, the gas-liquid separation efficiency is low, resulting in poor separation effect and needs improvement.
The orifice plate structure and stirring rod design are adopted to achieve contact between steam and liquid through the orifice plate, and the contact area between steam and diethyl phenylethylmalonate is increased through the stirring rod, and combined with the agitation of the bottom stirring paddle, the gas phase separation effect is improved.
The gas-liquid separation efficiency is improved, the number of distillations is reduced, and the production efficiency is improved.
Smart Images
Figure CN223170350U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reaction kettles, in particular to a rectifying kettle for the production of diethyl phenylethylmalonate. Background Technique
[0002] Diethyl phenylethylmalonate is a chemical, and its molecular formula is C15H20O4. Appearance and properties: transparent liquid. Density: 1.07 g / mL at 25 °C (lit.). Melting point: -7 °C. Boiling point: 185 °C 15 mmHg (lit.). Flash point: >230 °F. It is a raw material for organic synthesis and is used as an intermediate for drugs such as phenobarbital and primidone.
[0003] During the production process of diethyl phenylethylmalonate, after the post-treatment is completed, rectification treatment needs to be carried out through a rectifying kettle, so that the diethyl phenylethylmalonate is rectified to obtain high-quality diethyl phenylethylmalonate. The existing rectifying kettles generally directly add diethyl phenylethylmalonate into the kettle body and heat it to separate gas and liquid, and the separation efficiency is low. Therefore, an improved technology is urgently needed to solve this problem existing in the prior art. Content of the Utility Model
[0004] The purpose of the utility model is to provide a rectifying kettle for the production of diethyl phenylethylmalonate, which realizes the contact between steam and liquid through an orifice plate to improve the gas-liquid separation effect. A stirring rod is installed above each orifice plate through a main shaft. Through the agitation of the stirring rod, the contact area between the steam and the crude diethyl phenylethylmalonate is greatly increased, further improving the separation effect of the gas phase of diethyl phenylethylmalonate, reducing the rectification times, and improving the efficiency, so as to solve the problems raised in the above background technique.
[0005] To achieve the above purpose, the utility model provides the following technical solution: A rectifying kettle for the production of diethyl phenylethylmalonate, including a kettle body, a kettle cover, a motor, a main shaft, an orifice plate and a stirring rod. A kettle cover is arranged on the upper surface of the kettle body. A motor seat is arranged on the upper surface of the kettle cover. A motor is arranged on the upper surface of the motor seat. The output shaft of the motor is connected to the main shaft through a coupling. A gas phase outlet is arranged on one side of the upper part of the kettle cover. A jacket is arranged on the outer surface of the kettle body. A feed inlet is arranged on the upper part of one side of the kettle body. A steam inlet is arranged on the lower part of the other side of the kettle body. A discharge outlet is arranged at the bottom of the kettle body. A plurality of annular support plates are arranged on the inner wall of the kettle body. The orifice plates are supported on the upper surfaces of the annular support plates. A bottom stirring paddle is installed at the bottom of the main shaft. The main shaft is also provided with a plurality of stirring rods, which correspond to the orifice plates one by one. The stirring rods are rotatably arranged above the corresponding orifice plates. The orifice plates are densely provided with air holes. A flow hole is opened on one side of the orifice plate. The flow holes of the two adjacent orifice plates above and below are respectively located on both sides. A guide sleeve is arranged at the central position of the orifice plate.
[0006] Preferably, a rectifying still for producing diethyl phenyl ethyl malonate provided by the utility model, wherein, a rectifying still for producing diethyl phenyl ethyl malonate includes a kettle body, a kettle cover, a motor, a main shaft, an orifice plate and a stirring rod. A kettle cover is arranged on the upper surface of the kettle body. A motor base is arranged on the upper surface of the kettle cover. A motor is arranged on the upper surface of the motor base. The output shaft of the motor is connected to the main shaft through a coupling. A gas phase outlet is arranged on one side of the upper part of the kettle cover. A jacket is arranged on the outer surface of the kettle body. A feed inlet is arranged on the upper part of one side of the kettle body. A steam inlet is arranged on the lower part of the other side of the kettle body. A discharge outlet is arranged at the bottom of the kettle body. A plurality of layers of annular support plates are arranged on the inner wall of the kettle body. Orifice plates are supported on the upper surfaces of the annular support plates. A bottom stirring paddle is installed at the bottom of the main shaft. A plurality of stirring rods are further installed on the main shaft. The stirring rods correspond to the orifice plates one by one. The stirring rods are rotatably arranged above the corresponding orifice plates. The orifice plates are densely provided with air holes. A flow hole is formed on one side of the orifice plate. The flow holes of two adjacent upper and lower orifice plates are respectively located on both sides. A guide sleeve is arranged at the central position of the orifice plate.
[0007] Preferably, a rectifying still for producing diethyl phenyl ethyl malonate provided by the utility model, wherein, a thermometer port and a pressure gauge port are further arranged on the upper surface of the kettle cover.
[0008] Preferably, a rectifying still for producing diethyl phenyl ethyl malonate provided by the utility model, wherein, the orifice plate is connected to the annular support plate through bolts.
[0009] Preferably, a rectifying still for producing diethyl phenyl ethyl malonate provided by the utility model, wherein, support legs are arranged at the bottom of the jacket.
[0010] Preferably, a rectifying still for producing diethyl phenyl ethyl malonate provided by the utility model, wherein, a high-temperature air outlet is arranged on one side of the upper part of the jacket, and a high-temperature air inlet is arranged at the lower part of the jacket.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] Inside the kettle body, several layers of orifice plates are arranged through annular support plates, and the main shaft passes through the guide sleeves of the orifice plates. When the crude product of diethyl phenyl ethylmalonate enters the kettle body, it reacts with the rising steam, thereby realizing the separation of gas phase and liquid phase. The gas phase is discharged from the gas phase outlet at the top, and the liquid phase flows to the bottom of the kettle body. During this process, the liquid phase is stirred by the bottom stirring paddle. When the kettle body is heated, the heat exchange effect is improved, thereby improving the gas phase separation effect during boiling. And the contact between steam and liquid is realized through the orifice plate, improving the gas-liquid separation effect. Above each layer of orifice plate, a stirring rod is installed through the main shaft. Through the agitation of the stirring rod, the contact area between the steam and the crude product of diethyl phenyl ethylmalonate is greatly increased, further improving the gas phase separation effect of diethyl phenyl ethylmalonate, reducing the number of rectification times, and improving the efficiency. The flow holes of two adjacent orifice plates above and below are located on both sides respectively to ensure the flow path of diethyl phenyl ethylmalonate and ensure the gas-liquid separation effect. Description of the Drawings
[0013] Figure 1 is a schematic structural diagram of the present invention;
[0014] Figure 2 is a schematic structural diagram of the orifice plate;
[0015] Figure 3 is a schematic structural diagram of the stirring rod (the structure of the bottom stirring paddle is the same as that of the stirring rod);
[0016] Figure 4 is a schematic external structural diagram of the present invention.
[0017] In the figure: kettle body 1, kettle cover 2, motor 3, main shaft 4, orifice plate 5, stirring rod 6, gas phase outlet 7, jacket 8, feed inlet 9, steam inlet 10, discharge outlet 11, annular support plate 12, bottom stirring paddle 13, air hole 14, flow hole 15, guide sleeve 16, connecting sleeve 17, thermometer port 18, pressure gauge port 19, support leg 20, high-temperature gas outlet 21, high-temperature gas inlet 22. Detailed Embodiments
[0018] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the 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;
[0019] It should be noted that in the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "inside", "outside", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0020] Please refer to Figures 1-4 , the present utility model provides a technical solution: a rectifying still for the production of diethyl phenyl ethyl malonate, including a kettle body 1, a kettle cover 2, a motor 3, a main shaft 4, a perforated plate 5 and a stirring rod 6. A kettle cover 2 is arranged on the upper surface of the kettle body 1. A motor seat is arranged on the upper surface of the kettle cover 2, and a motor 3 is arranged on the upper surface of the motor seat. A thermometer port 18 and a pressure gauge port 19 are also arranged on the upper surface of the kettle cover 2 to respectively install a thermometer and a pressure gauge. The output shaft of the motor 3 is connected to the main shaft 4 through a coupling. A gas phase outlet 7 is arranged on one side of the upper part of the kettle cover 2. A jacket 8 is arranged on the outer surface of the kettle body 1. A support leg 20 is arranged at the bottom of the jacket 8 to achieve the overall support. A high-temperature gas outlet 21 is arranged on one side of the upper part of the jacket 8, and a high-temperature gas inlet 22 is arranged at the lower part of the jacket 8 to enable high-temperature steam to enter and leave the jacket 8. A feed inlet 9 is arranged at the upper part of one side of the kettle body 1, a steam inlet 10 is arranged at the lower part of the other side of the kettle body 1, and a discharge outlet 11 is arranged at the bottom of the kettle body 1. A plurality of layers of annular support plates 12 are arranged on the inner wall of the kettle body 1. The perforated plate 5 is supported on the upper surface of each annular support plate 12. The perforated plate 5 is connected to the annular support plate 12 by bolts to achieve the installation and disassembly of the perforated plate 5. A bottom stirring paddle 13 is installed at the bottom of the main shaft 4. The main shaft 4 is also provided with a plurality of stirring rods 6. The stirring rods 6 correspond to the perforated plates 5 one by one. The stirring rods 6 are rotatably arranged above the corresponding perforated plates 5. A connecting sleeve 17 is arranged at the middle position between the bottom stirring paddle 13 and the stirring rods 6. The main shaft 4 is connected to the connecting sleeve 17 and fastened by bolts to achieve the connection and disassembly of the bottom stirring paddle 13 and the stirring rods 6 with the main shaft 4, and to achieve the sequential installation of the bottom stirring paddle 13 and the stirring rods 6. The perforated plate 5 is densely provided with air holes 14. A flow hole 15 is arranged on one side of the perforated plate 5. The flow holes 15 of the two adjacent upper and lower perforated plates 5 are respectively located on both sides. A guide sleeve 16 is arranged at the central position of the perforated plate 5.
[0021] Installation method and working principle: First, connect the bottom stirring paddle 13 to the bottom of the main shaft 4 and fasten it with bolts. Then, pass the first orifice plate 5 from top to bottom through the guide sleeve 16 and fit it with the main shaft 4, and support the periphery of the orifice plate 5 on the lowermost annular support plate 12, and fasten it with bolts at the same time. Then, put the first stirring rod 6 on the connecting sleeve 17 of the main shaft 4 from top to bottom, and fasten it to the main shaft 4 with bolts. Subsequently, install the second orifice plate 5. Put the guide sleeve 16 of the second orifice plate 5 on the main shaft 4, and make the flow holes 15 of the second orifice plate 5 stagger with the flow holes 15 of the lower orifice plate 5. Slide the second orifice plate 5 down along the main shaft 4 into the kettle body 1, and support it on the second-layer annular support plate 12 and fix it with bolts at the same time. Fit the second stirring rod 6 with the main shaft 4 through the connecting sleeve 17, and then slide the second stirring rod 6 above the second orifice plate 5 and fasten it with bolts. Then, install the remaining orifice plates 5 and stirring rods 6 in sequence. Finally, install the kettle cover 2 on the upper surface of the kettle body 1, install the motor 3 on the upper surface of the motor base, lift the main shaft 4 and connect the top of the main shaft 4 to the output shaft of the motor 3 through a coupling to complete the installation. When in use, the crude product of diethyl phenyl ethylmalonate enters the kettle body 1 from the feed inlet 9, and the steam enters the kettle body 1 from the steam inlet 10. Start the motor 3, the motor 3 drives the main shaft 4 to rotate, the main shaft 4 drives the stirring rod 6 to rotate, the crude product of diethyl phenyl ethylmalonate flows onto the orifice plate 5, the steam passes upward through the air holes 14 and contacts the diethyl phenyl ethylmalonate. The gas-phase part of the diethyl phenyl ethylmalonate follows the steam and is discharged from the gas-phase outlet 7 at the top. After subsequent condensation, the refined product of diethyl phenyl ethylmalonate is obtained. The liquid phase of the diethyl phenyl ethylmalonate flows through the flow holes 15 to the next-layer orifice plate 5 until it reaches the bottom of the kettle body 1, and the bottom of the kettle body 1 re-enters the kettle body 1 from the feed inlet 9 through a circulation pump. During the process, high-temperature steam is introduced into the jacket 8 to make the temperature in the kettle body 1 150 - 180 °C, and make the bottom liquid phase boil to further separate the gas phase. The structure of the utility model is reasonable. Inside the kettle body 1, several layers of orifice plates 5 are arranged through the annular support plates 12, and the main shaft 4 passes through the guide sleeves 16 of the orifice plates 5. When the crude product of diethyl phenyl ethylmalonate enters the kettle body 1, it reacts with the rising steam, so as to realize the separation of the gas phase and the liquid phase. The gas phase is discharged from the gas-phase outlet 7 at the top, and the liquid phase flows to the bottom of the kettle body 1. During the process, the liquid phase is stirred by the bottom stirring paddle 13. When the kettle body 1 is heated, the heat exchange effect is improved, so as to improve the gas-phase separation effect during boiling. And the contact between the steam and the liquid is realized through the orifice plate 5 to improve the gas-liquid separation effect. Above each layer of orifice plate 5, a stirring rod 6 is installed through the main shaft 4. Through the agitation of the stirring rod 6, the contact area between the steam and the crude product of diethyl phenyl ethylmalonate is greatly increased, further improving the gas-phase separation effect of the diethyl phenyl ethylmalonate, reducing the number of rectification times, and improving the efficiency. The flow holes 15 of the upper and lower adjacent orifice plates 5 are located on both sides respectively to ensure the flow path of the diethyl phenyl ethylmalonate and ensure the gas-liquid separation effect.
[0022] Where the present utility model is not described in detail, it is the well-known technology of those skilled in the art.
[0023] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit them. Although the present utility model has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified and equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model, and they should all be covered within the scope of the claims of the present utility model.
Claims
1. A rectifying still for the production of diethyl phenylethylmalonate, characterized in that: It includes a kettle body (1), a kettle cover (2), a motor (3), a main shaft (4), an orifice plate (5) and a stirring rod (6). The upper surface of the kettle body (1) is provided with the kettle cover (2). The upper surface of the kettle cover (2) is provided with a motor base. The upper surface of the motor base is provided with the motor (3). The output shaft of the motor (3) is connected to the main shaft (4) through a coupling. One side of the upper part of the kettle cover (2) is provided with a gas phase outlet (7). The outer surface of the kettle body (1) is provided with a jacket (8). The upper part of one side of the kettle body (1) is provided with a feed inlet (9). The lower part of the other side of the kettle body (1) is provided with a steam inlet (10). The bottom of the kettle body (1) is provided with a discharge outlet (11). The inner wall of the kettle body (1) is provided with several layers of annular support plates (12). The upper surfaces of the annular support plates (12) all support the orifice plate (5). The bottom of the main shaft (4) is installed with a bottom stirring paddle (13). The main shaft (4) is also installed with several stirring rods (6). The stirring rods (6) correspond to the orifice plates (5) one by one. The stirring rods (6) are rotatably arranged above the corresponding orifice plates (5). The orifice plate (5) is densely provided with air holes (14). One side of the orifice plate (5) is provided with a flow hole (15). The flow holes (15) of two adjacent upper and lower orifice plates (5) are respectively located on both sides. The center position of the orifice plate (5) is provided with a guide sleeve (16).
2. The rectifying still for the production of diethyl phenyl ethylmalonate according to claim 1, characterized in that: A connecting sleeve (17) is arranged at the middle positions of the bottom stirring paddle (13) and the stirring rod (6). The main shaft (4) is connected to the connecting sleeve (17) and fastened by bolts.
3. The rectifying still for the production of diethyl phenyl ethylmalonate according to claim 1, characterized in that: The upper surface of the kettle cover (2) is also provided with a thermometer port (18) and a pressure gauge port (19).
4. A rectifying still for the production of diethyl phenylethylmalonate according to claim 1, characterized in that: The orifice plate (5) is connected to the annular support plate (12) by bolts.
5. A rectifying still for the production of diethyl phenylethylmalonate according to claim 1, characterized in that: The bottom of the jacket (8) is provided with support legs (20).
6. The rectifying still for producing diethyl phenylethylmalonate according to claim 1, characterized in that: One side of the upper part of the jacket (8) is provided with a high-temperature air outlet (21). The lower part of the jacket (8) is provided with a high-temperature air inlet (22).