A plug flow device for triphenylphosphine

Abstract

This utility model discloses a plug flow device for triphenylphosphine, relating to the field of chemical production equipment. It includes a first stirred tank, a first feeder located at the top of the first stirred tank, a second stirred tank connected to the first stirred tank with its inlet lower than the outlet of the first stirred tank, a second feeder located at the top of the second stirred tank, a third stirred tank connected to the second stirred tank with its inlet lower than the outlet of the second stirred tank, a fourth stirred tank connected to the third stirred tank with its inlet lower than the outlet of the third stirred tank, and a flow-suppressing structure located inside the second stirred tank to suppress the flow of liquid within it. This plug flow device for triphenylphosphine ensures a plug flow state for the material during the reaction process, improving the reaction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment, specifically a triphenylphosphine plug flow device. Background Technology

[0002] In chemical production, plug flow reactors are important reaction equipment. They enable materials to flow at a uniform axial velocity within the reactor, preventing radial mixing and thus achieving ideal reaction results. Triphenylphosphine, as an important organophosphorus compound, has wide applications in many chemical reactions. Its production process often has high requirements for reaction conditions, and plug flow plays a crucial role in ensuring reaction selectivity and yield.

[0003] However, in some reactions involving triphenylphosphine, a secondary reaction requires the addition of new reactants after the initial reaction. Typically, the initial reactants are transferred to a second stirred tank while the new reactants are added. However, the newly added material disrupts the flow path and velocity of the initial reactants, thus disrupting the plug flow state of the entire apparatus. Utility Model Content

[0004] The purpose of this invention is to provide a plug flow device for triphenylphosphine, which can ensure the plug flow state of materials during the reaction process and improve the reaction effect.

[0005] The above-mentioned optimized structure of this utility model is achieved through the following technical solution: a triphenylphosphine plug flow device, comprising a first stirring vessel;

[0006] The first feeder is located at the top of the first mixing vessel;

[0007] A second stirring vessel is connected to the first stirring vessel, and the inlet of the second stirring vessel is lower than the outlet of the first stirring vessel.

[0008] The second feeder is located at the top of the second mixing vessel;

[0009] A third stirring vessel is connected to the second stirring vessel, and the inlet of the third stirring vessel is lower than the outlet of the second stirring vessel;

[0010] A fourth stirring vessel is connected to the third stirring vessel, and the inlet of the fourth stirring vessel is lower than the outlet of the third stirring vessel.

[0011] A flow-suppressing structure is provided inside the second stirred tank to suppress the flow of liquid inside the second stirred tank.

[0012] In some embodiments, a fixing frame is further included, on which the first stirring vessel, the second stirring vessel, the third stirring vessel, and the fourth stirring vessel are disposed.

[0013] In some embodiments, the first stirring vessel, the second stirring vessel, the third stirring vessel, and the fourth stirring vessel each include a vessel body, which is disposed on the fixed frame;

[0014] A stirring motor is fixedly mounted on the top of the vessel body;

[0015] A stirring rod is rotatably disposed inside the vessel and fixedly connected to the output shaft of the stirring motor.

[0016] A stirring blade is coaxially disposed at the bottom of the stirring rod.

[0017] In some embodiments, the flow suppression structure includes a vertical baffle plate disposed inside the second stirring vessel and between the second feeder and the liquid outlet of the second stirring vessel; and the bottom surface of the vertical baffle plate is lower than the liquid outlet of the second stirring vessel.

[0018] In some embodiments, the flow suppression structure further includes a horizontal baffle plate, which is vertically disposed at the bottom of the vertical baffle plate and fixedly connected to the inner wall of the second stirring vessel. The horizontal baffle plate is provided through the stirring rod, and the stirring blade is provided below the horizontal baffle plate.

[0019] Multiple flow holes are provided on the side of the horizontal baffle away from the vertical baffle.

[0020] In some embodiments, the first stirred tank, the second stirred tank, the third stirred tank, and the fourth stirred tank all include a temperature measuring component, which can measure the temperature of the liquid at the outlet of the tank.

[0021] In some embodiments, the first stirring vessel, the second stirring vessel, the third stirring vessel, and the fourth stirring vessel further include a jacket, which is fitted onto the bottom of the vessel body.

[0022] In summary, this utility model has the following beneficial effects:

[0023] This type of plug flow device for triphenylphosphine utilizes the height difference between the inlet and outlet of different stirred tanks to allow materials to flow sequentially and stably between them, achieving continuity and stability in the plug flow reaction and improving production efficiency. Simultaneously, vertical baffles prevent materials from the second stirred tank from flowing directly into the outlet from the horizontal plane, thus extending the flow path of the added materials and preliminary reactants in the second reactor. Furthermore, horizontal baffles and flow holes reduce the flow velocity of the mixture towards the outlet, preventing disruption of the overall plug flow state and ensuring a smooth plug flow during the reaction process, thereby improving the reaction effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the second stirring vessel of this utility model.

[0026] In the figure: 1. First mixing vessel; 11. Vessel body; 12. Mixing motor; 13. Mixing rod; 14. Mixing blade; 15. Temperature measuring component; 16. Jacket; 2. First feeder; 3. Second mixing vessel; 4. Second feeder; 5. Third mixing vessel; 6. Fourth mixing vessel; 7. Flow suppression structure; 71. Vertical baffle; 72. Horizontal baffle; 73. Flow hole; 8. Fixing frame. Detailed Implementation

[0027] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0028] refer to Figure 1-2A plug flow device for triphenylphosphine comprises a first stirred tank 1, a first feeder 2, a second stirred tank 3, a second feeder 4, a third stirred tank 5, a fourth stirred tank 6, a flow-suppressing structure 7, and a fixing frame 8. The fixing frame 8 serves as the foundation for the entire device and can be equipped with multiple placement slots to allow the first stirred tank 1, second stirred tank 3, third stirred tank 5, and fourth stirred tank 6 to be placed at different heights. The first stirred tank 1 is the initial stage of the reaction, and its top is equipped with a first feeder 2 for feeding the initial raw materials for the triphenylphosphine reaction into the first stirred tank 1 to achieve a preliminary reaction. The first stirred tank 1 is connected to the second stirred tank 3, and the inlet of the second stirred tank 3 is lower than the outlet of the first stirred tank 1. The height difference between the two facilitates the natural flow of materials by gravity, achieving a plug flow effect. The top of the second stirred tank 3 is equipped with a second feeder 4, which can be used to add other reactants or additives during the reaction process to regulate the reaction progress. The first feeder 2 and the second feeder 4 can be selected according to actual production needs. Their connection with the stirred tank is existing technology and will not be described in detail here. The second stirred tank 3 is connected to the third stirred tank 5, and the inlet of the third stirred tank 5 is lower than the outlet of the second stirred tank 3 to ensure sequential material flow. The third stirred tank 5 is connected to the second stirred tank 3, and its inlet is lower than the outlet of the second stirred tank 3 to continue promoting the plug flow reaction. The fourth stirred tank 6 is connected to the third stirred tank 5, and its inlet is lower than the outlet of the third stirred tank 5 to complete the entire plug flow reaction process. The flow suppression structure 7 is located inside the second stirred tank 3, which can suppress the flow of liquid in the second stirred tank 3, reduce backmixing, and thus ensure the plug flow effect.

[0029] In some embodiments, the first stirred tank 1, the second stirred tank 3, the third stirred tank 5, and the fourth stirred tank 6 each include a tank body 11, a stirring motor 12, a stirring rod 13, and a stirring blade 14. The tank body 11 is mounted on a fixed frame 8 and can be fixed with bolts. The tank body 11 can be made of 316L stainless steel, which has excellent corrosion resistance and strength and can withstand the erosion of the acid and alkaline environment during the production of triphenylphosphine. The stirring motor 12 is fixed to the top of the tank body 11, and its output shaft can extend into the tank body 11 to provide power for the stirring process. The stirring motor 12 can be a variable frequency motor, which can adjust the stirring speed according to the reaction requirements. The stirring rod 13 is rotatably mounted inside the tank body 11 and is fixedly connected to the output shaft of the stirring motor 12. The stirring blade 14 is coaxially mounted at the bottom of the stirring rod 13. When the stirring motor 12 rotates, it drives the stirring blade 14 to rotate through the stirring rod 13, thereby ensuring the full mixing of the materials in the tank body 11 and promoting the reaction.

[0030] In some embodiments, the flow suppression structure 7 includes a vertical baffle 71, which is disposed inside the second mixing vessel 3 and between the second feeder 4 and the liquid outlet of the second mixing vessel 3. The bottom surface of the vertical baffle 71 is lower than the liquid outlet of the second mixing vessel 3, which can prevent newly added materials from falling into the vessel body 11 of the second mixing vessel 3 and flowing directly to the liquid outlet of the second mixing vessel 3, thus extending the flow path of the materials, reducing back mixing, and ensuring the smooth flow effect.

[0031] In some embodiments, the flow suppression structure 7 further includes a horizontal baffle 72 and multiple flow holes 73. The horizontal baffle 72 is vertically disposed at the bottom of the vertical baffle 71 and is fixedly connected to the inner wall of the second stirring vessel 3. It can be welded and fixed. The horizontal baffle 72 is provided with a stirring rod 13 through it, ensuring that the stirring rod 13 can rotate freely. A stirring blade 14 is provided below the horizontal baffle 72. When the stirring blade 14 stirs the surrounding liquid, the horizontal baffle 72 suppresses the turbulence of the liquid and dissipates some of the kinetic energy brought by the newly added material, thereby reducing the speed at which the liquid flows to the outlet of the second stirring vessel 3 and further ensuring the smooth flow effect. Multiple flow holes 73 are disposed on the side of the horizontal baffle 72 away from the vertical baffle 71, so that the material can only flow slowly through the flow holes 73, further ensuring the smooth flow effect. Both the vertical baffle 71 and the horizontal baffle 72 can be made of polytetrafluoroethylene (PTFE), which has an extremely low coefficient of friction and excellent chemical stability, and can prevent material adhesion and corrosion.

[0032] In some embodiments, the first stirred tank 1, the second stirred tank 3, the third stirred tank 5, and the fourth stirred tank 6 each include a temperature measuring component 15. The temperature measuring component 15 may be a Pt100 resistance temperature detector (RTD) sensor, and its measuring end is installed near the liquid outlet of each stage of the tank body 11. It can measure the temperature of the liquid at the liquid outlet of the tank body 11 so as to keep track of the temperature changes during the reaction process and provide data support for the adjustment of reaction conditions.

[0033] In some embodiments, the first stirring vessel 1, the second stirring vessel 3, the third stirring vessel 5, and the fourth stirring vessel 6 also include a jacket 16. The jacket 16 is fitted at the bottom of the vessel body 11 and can adopt a spiral channel, which is the prior art and will not be described in detail here. Heating or cooling media such as heat transfer oil or cooling water can be introduced into the jacket 16. By adjusting the flow rate and temperature of the medium, the temperature of the material in the vessel body 11 can be controlled.

[0034] The specific working principle is as follows:

[0035] In the production process of triphenylphosphine, the material first enters the first stirred tank 1 through the first feeder 2. The stirring motor 12 drives the stirring rod 13 and the stirring blade 14 to initially mix the material, and the mixture flows out from the liquid outlet of the first stirred tank 1. Under its own gravity, it flows into the second stirred tank 3. According to the reaction progress, other reactants or additives are added to the second stirred tank 3 through the second feeder 4 in a timely manner. At this time, the vertical baffle 71 separates the feed port and the liquid outlet of the second stirred tank 3 at the same height, so that the material fed by the second feeder 4... The mixture formed by mixing the material with the initial reactants flows to the bottom of the vertical baffle 71. Under the stirring action of the stirring blades 14 in the second feeder 4, it flows towards the outlet. During this process, it will collide with the horizontal baffle 72 and finally flow from the flow hole 73 to the outlet. Due to the collision between the mixture and the horizontal baffle 72, the flow speed of the mixture will be reduced, thereby avoiding the disruption of the horizontal flow state by secondary feeding and ensuring the horizontal flow effect. Under the action of gravity, the material passes through the third stirring tank 5 and the fourth stirring tank 6 in sequence, thereby realizing the horizontal flow production of triphenylphosphine.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for triphenylphosphine plug flow, characterized by: Including the first stirring vessel (1); The first feeder (2) is located on the top of the first mixing vessel (1); The second stirring vessel (3) is connected to the first stirring vessel (1), and the inlet of the second stirring vessel (3) is lower than the outlet of the first stirring vessel (1); The second feeder (4) is located on top of the second mixing vessel (3); The third stirring vessel (5) is connected to the second stirring vessel (3), and the inlet of the third stirring vessel (5) is lower than the outlet of the second stirring vessel (3); The fourth stirring vessel (6) is connected to the third stirring vessel (5), and the inlet of the fourth stirring vessel (6) is lower than the outlet of the third stirring vessel (5). The flow suppression structure (7) is located inside the second stirring vessel (3) and can suppress the flow of liquid inside the second stirring vessel (3).

2. The triphenylphosphine plug flow device according to claim 1, characterized in that: It also includes a fixing frame (8), on which the first stirring vessel (1), the second stirring vessel (3), the third stirring vessel (5), and the fourth stirring vessel (6) are provided.

3. A device for the plug flow of triphenylphosphine according to claim 2, characterized by: The first stirring vessel (1), the second stirring vessel (3), the third stirring vessel (5), and the fourth stirring vessel (6) all include a vessel body (11), which is mounted on the fixed frame (8); A stirring motor (12) is fixed to the top of the vessel body (11); A stirring rod (13) is rotatably disposed inside the vessel body (11) and fixedly connected to the output shaft of the stirring motor (12); A stirring blade (14) is coaxially disposed at the bottom of the stirring rod (13).

4. A device for the plug flow of triphenylphosphine according to claim 3, characterized in that: The flow suppression structure (7) includes a vertical baffle (71), which is located inside the second stirring vessel (3) and between the second feeder (4) and the liquid outlet of the second stirring vessel (3); and the bottom surface of the vertical baffle (71) is lower than the liquid outlet of the second stirring vessel (3).

5. A device for the plug flow of triphenylphosphine according to claim 4, characterized by: The flow suppression structure (7) also includes a horizontal baffle (72), which is vertically disposed at the bottom of the vertical baffle (71) and fixedly connected to the inner wall of the second stirring vessel (3). The horizontal baffle (72) is provided through the stirring rod (13), and the stirring blade (14) is provided below the horizontal baffle (72). Multiple flow holes (73) are provided on the side of the horizontal baffle (72) away from the vertical baffle (71).

6. A device for the plug flow of triphenylphosphine according to claim 3, characterized by: The first stirring vessel (1), the second stirring vessel (3), the third stirring vessel (5), and the fourth stirring vessel (6) all include a temperature measuring component (15), which can measure the temperature of the liquid at the outlet of the vessel body (11).

7. A device for the continuous flow of triphenylphosphine according to claim 3, characterized in that: The first stirring vessel (1), the second stirring vessel (3), the third stirring vessel (5), and the fourth stirring vessel (6) all include a jacket (16), which is fitted onto the bottom of the vessel body (11).

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