A grignard reactor

Abstract

The utility model relates to a grignard reactor, include: for carrying out grignard reaction's reactor main body, for storing and inputting magnesium powder to the magnesium powder input cavity in reactor main body, for the agitator that stirs reactant material in reactor main body, for inputting liquid material to the input in reactor main body, for inputting magnesium powder to the magnesium powder input in magnesium powder input cavity and for carrying out the vacuumizing connecting mouth of vacuumizing in reactor main body and magnesium powder input cavity. The utility model discloses the grignard reactor in the reactant stock only upgrade (traditional is hundred liters upgrade), and the risk of out of control reduces greatly, and the whole process is closed protection and is isolated oxygen and moisture. The utility model discloses the grignard reactor through the problem that magnesium powder falls in the mixed unevenness of porous mesh board is solved, and the magnesium powder accumulated on the porous mesh board can be pushed away simultaneously by push rod.

Description

Technical Field

[0001] This utility model relates to the technical field of chemical reactors, and specifically to a Grignard reactor. Background Technology

[0002] Grignard reactors are used for the chemical reaction of organohalogen compounds with metallic magnesium. The Grignard reaction initially requires external initiation (such as heating or adding an initiator) due to the obstruction of the magnesium oxide layer. Using traditional reactors, if initiation fails, the continuous accumulation of halogenated compounds followed by a sudden reaction can lead to violent exothermic reactions, material overflow, or even explosions. Furthermore, the Grignard reaction is highly exothermic (e.g., ΔH ≈ -200 kJ / mol in the preparation stage). Traditional reactors, limited by their heat transfer area and materials, are prone to localized overheating, leading to side reactions (such as coupling reactions) and runaway risks. Additionally, Grignard reactions commonly use solvents such as diethyl ether and tetrahydrofuran, which have low boiling points and are flammable, requiring a strict air-free environment for the reaction system. Insufficient sealing in traditional reactors can cause solvent vapors to form explosive mixtures. As the reaction scales up, mass and heat transfer efficiency further decreases, the temperature gradient increases, leading to more byproducts and a decrease in yield. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model proposes a Grignard reactor, comprising: a reactor body for carrying out a Grignard reaction, a magnesium powder inlet chamber for storing and feeding magnesium powder into the reactor body, a stirrer for stirring the reactants in the reactor body, an inlet for feeding liquid materials into the reactor body, a magnesium powder inlet chamber for feeding magnesium powder into the magnesium powder inlet chamber, and a vacuum connection port for evacuating the reactor body and the magnesium powder inlet chamber. The reactor body includes a reaction chamber, and the reaction chamber has an outlet on the side near the magnesium powder input chamber for discharging the reacted material out of the reactor body.

[0004] Based on the above scheme, the agitator includes a stirring shaft and a first tube box and a second tube box disposed at both ends of the stirring shaft; the stirring shaft is provided with stirring blades.

[0005] Based on the above scheme, the second tube box is provided with a bearing part for cooperating with the rotation of the stirring shaft and a tube box groove for connecting the input port.

[0006] Based on the above scheme, one end of the reactor body is provided with a first main flange for use with the second tube box, and the other end is provided with a second main flange; the reactor body is also provided with at least one viewing window for observing the reaction state inside the reactor body.

[0007] Based on the above scheme, the magnesium powder input cavity includes a cavity body and an input cavity first flange and an input cavity second flange that are disposed at both ends of the cavity body and are used in conjunction with the second main body flange and the first pipe box.

[0008] Based on the above scheme, a temperature control sleeve is also included, which is set outside the reactor body to control the temperature of the reactants inside the reactor body.

[0009] Based on the above scheme, the temperature control tube inside the temperature control sleeve is spiral in shape.

[0010] Based on the above scheme, a perforated mesh plate is provided inside the magnesium powder input cavity.

[0011] Based on the above scheme, the stirring shaft is equipped with a pusher for pushing magnesium powder on the porous mesh plate.

[0012] Based on the above scheme, the bottom surface of the push rod is 4-8mm away from the upper surface of the perforated mesh plate.

[0013] Unlike traditional reaction vessels, this Grignard reactor is composed of a main reactor body, a magnesium powder inlet chamber, and a stirrer, featuring a compact structure. It allows for precise control of flow rate, temperature, and residence time during the reaction process, improving product selectivity. The reactant volume in this Grignard reactor is only one liter (compared to hundreds of liters in traditional reactors), significantly reducing the risk of runaway. The entire process is sealed to prevent the introduction of oxygen and moisture. This Grignard reactor utilizes a porous mesh plate to address the issue of uneven mixing of magnesium powder during inlet. Simultaneously, a pusher rod disperses the magnesium powder accumulated on the porous mesh plate, ensuring more uniform magnesium powder distribution into the reaction solution. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the Grignard reactor in Embodiment 1 of this utility model (excluding the temperature control sleeve). Figure 2 This is a schematic diagram of the Grignard reactor in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the stirrer in the Grignard reactor of Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the structure of the second tube box of the stirrer in the Grignard reactor in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram (sectional view) of the Grignard reactor in Embodiment 1 of this utility model. Figure 6 This is a schematic diagram of the Grignard reactor in Embodiment 1 of this utility model (a cross-sectional view including the perforated mesh plate and pusher). Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] Example 1 like Figure 1 and 2 As shown, this utility model provides a Grignard reactor, including a reactor body 1 for carrying out a Grignard reaction, a magnesium powder inlet chamber 2 for storing and feeding magnesium powder into the reactor body 1, a stirrer 3 for stirring the reactants in the reactor body 1, an inlet 4 for feeding liquid materials into the reactor body 1, a magnesium powder inlet 5 for feeding magnesium powder into the magnesium powder inlet chamber 2, and a vacuum connection port 6 for evacuating the reactor body 1 and the magnesium powder inlet chamber 2. The reactor body 1 includes a reaction body cavity 1-1, and the reaction body cavity 1-1 is provided with an output port 1-2 for outputting the reacted material from the reactor body 1 on the side near the magnesium powder input cavity 2.

[0017] Using the Grignard reactor described above, magnesium powder fed into the magnesium powder inlet 5 falls directly into the reactor body 1 from the magnesium powder inlet chamber 2. This results in uneven mixing of the falling magnesium powder. To solve this problem, based on the Grignard reactor described above, a perforated mesh plate 2-4 is provided inside the magnesium powder inlet chamber 2. In this way, the fed magnesium powder first falls onto the perforated mesh plate 2-4, and then disperses through the mesh openings of the perforated mesh plate 2-4 into the reactor body 1.

[0018] like Figure 3 As shown, in a specific implementation, the stirrer 3 includes a stirring shaft 3-1 and a first tube box 3-2 and a second tube box 3-3 connected to both ends of the stirring shaft 3-1; the stirring shaft 3-1 is provided with stirring blades 3-4.

[0019] In use, a permanent magnet coupling can be used to drive the stirring shaft 3-1 to rotate, thereby stirring the reaction materials inside the reactor body 1.

[0020] To prevent magnesium powder from accumulating on the porous mesh plate 2-4, a push rod 2-5 is provided on the stirring shaft 3-1 to push the magnesium powder on the porous mesh plate 2-4. In one specific embodiment, the bottom surface of the push rod 2-5 is 4-8 mm from the upper surface of the porous mesh plate 2-4. When the stirring shaft 3-1 rotates, it drives the push rod 2-5 to rotate as well, thereby pushing the magnesium powder on the porous mesh plate 2-4 more evenly.

[0021] like Figure 4 As shown, the second tube box 3-3 is provided with a bearing part 3-31 for cooperating with the rotation of the stirring shaft 3-1 and a tube box groove 3-32 for connecting the input port 4.

[0022] The reactor body 1 is provided with a first main flange 1-4 at one end for use with the second tube box 3-3, and a second main flange 1-5 at the other end; the reactor body 1 is also provided with at least one viewing window 1-3 for observing the reaction state inside the reactor body 1.

[0023] The magnesium powder input cavity 2 includes a cavity body 2-1 and an input cavity first flange 2-2 disposed at both ends of the cavity body 2-1 for use with the second main body flange 1-5 and an input cavity second flange 2-3 for use with the first pipe box 3-2.

[0024] Based on the above-mentioned Grignard reactor, in order to more accurately control the material reaction temperature inside the reactor body 1, a temperature control sleeve 7 is also provided on the outside of the reactor body 1 for temperature control of the reaction material inside the reactor body 1.

[0025] The temperature control tube 7-1 inside the temperature control sleeve 7 is spiral in shape. This spiral channel forms a plunger flow, reduces the flow dead zone, enhances turbulence, and at the same time, the continuous spiral structure allows the fluid to directionally scour the tube bundle, reducing the boundary layer thermal resistance and improving the overall heat transfer efficiency.

[0026] Specifically, there are three temperature control sleeves 7 to achieve precise control of the material reaction temperature inside the reactor body 1.

[0027] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0028] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A Grignard reactor, characterized in that, include: The reactor body (1) is used for carrying out the Grignard reaction, the magnesium powder inlet chamber (2) is used for storing and feeding magnesium powder into the reactor body (1), the stirrer (3) is used for stirring the reaction material in the reactor body (1), the inlet (4) is used for feeding liquid material into the reactor body (1), the magnesium powder inlet (5) is used for feeding magnesium powder into the magnesium powder inlet chamber (2), and the vacuum connection port (6) is used for evacuating the reactor body (1) and the magnesium powder inlet chamber (2). The reactor body (1) includes a reaction body cavity (1-1), and the reaction body cavity (1-1) has an outlet (1-2) on the side near the magnesium powder input cavity (2) for outputting the reacted material out of the reactor body (1).

2. The Grignard reactor according to claim 1, characterized in that, The agitator (3) includes a stirring shaft (3-1) and a first tube box (3-2) and a second tube box (3-3) disposed at both ends of the stirring shaft (3-1); the stirring shaft (3-1) is provided with stirring blades (3-4).

3. The Grignard reactor according to claim 2, characterized in that, The second tube box (3-3) is provided with a bearing part (3-31) for cooperating with the rotation of the stirring shaft (3-1) and a tube box groove (3-32) for connecting the inlet (4).

4. The Grignard reactor according to claim 2, characterized in that, The reactor body (1) is provided with a first main flange (1-4) at one end for use with the second tube box (3-3) and a second main flange (1-5) at the other end; the reactor body (1) is also provided with at least one viewing window (1-3) for observing the reaction state inside the reactor body (1).

5. The Grignard reactor according to claim 2, characterized in that, The magnesium powder input cavity (2) includes a cavity body (2-1) and an input cavity first flange (2-2) disposed at both ends of the cavity body (2-1) for use with the second main body flange (1-5) and an input cavity second flange (2-3) for use with the first pipe box (3-2).

6. The Grignard reactor according to claim 1, characterized in that, It also includes a temperature control sleeve (7) located outside the reactor body (1) for controlling the temperature of the reaction material inside the reactor body (1).

7. The Grignard reactor according to claim 6, characterized in that, The temperature control tube (7-1) inside the temperature control sleeve (7) is spiral in shape.

8. The Grignard reactor according to claim 2, characterized in that, The magnesium powder input cavity (2) is provided with a perforated mesh plate (2-4).

9. The Grignard reactor according to claim 8, characterized in that, The stirring shaft (3-1) is equipped with a push rod (2-5) for pushing magnesium powder on the perforated mesh plate (2-4).

10. The Grignard reactor according to claim 9, characterized in that, The bottom surface of the push rod (2-5) is 4-8 mm away from the upper surface of the perforated mesh plate (2-4).

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