Reaction kettle for preparing 2-bromonaphthalene

Abstract

The utility model provides a reaction kettle for preparing 2-bromonaphthalene, which is characterized in that a stirring motor is arranged in the middle of a kettle cover and drives a stirring shaft to rotate, and the stirring shaft penetrates through the kettle cover and extends into a reaction kettle body; inner stirring blades are arranged at the middle lower part of the stirring shaft, a plurality of transverse connecting rods are arranged at the upper part of the stirring shaft, and outer shafts are arranged at the lower sides of the other ends of the transverse connecting rods and provided with outer stirring blades; two circles of heating pipes are also arranged in the reaction kettle body, the heating pipes are spiral coil pipes, the heating pipes are divided into an outer heating pipe and an inner heating pipe, the inner stirring blades are positioned on the inner side of the inner heating pipe, the outer stirring blades are positioned between the outer heating pipe and the inner heating pipe, and the lower parts of the outer heating pipe and the inner heating pipe are connected. Through the unique stirring and heating structural design, reaction materials can be fully mixed and rapidly and uniformly heated, the efficiency and quality of the 2-bromonaphthalene preparation reaction are improved, and the phenomenon of local overheating or supercooling in the reaction process is effectively avoided through the synergistic effect of the double-layer stirring blades, the inner heating pipe and the outer heating pipe.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a reaction kettle for preparing 2-bromonaphthalene. Background Art

[0002] 2-Bronaphthalene is a chemical substance that is insoluble in water but soluble in ethanol, ether, benzene, and chloroform. It is primarily used as a pharmaceutical intermediate. During its preparation, naphthalene and a bromine source are added to a reaction vessel in a specific ratio and reacted under appropriate temperature and pressure. A catalyst is often added to accelerate the reaction. After the reaction is complete, the resulting 2-bromonaphthalene dissolves in the solvent, forming a solution.

[0003] To maintain a suitable temperature within the reaction vessel during this process, the vessel must possess excellent temperature control capabilities. However, current reactors often utilize heating tubes, which are typically incorporated into the vessel. However, due to structural limitations, temperature control within the vessel is slow, which can affect the production of 2-bromonaphthalene. Utility Model Content

[0004] Based on the above technical problems, the utility model proposes a reaction kettle for preparing 2-bromonaphthalene.

[0005] A reactor for preparing 2-bromonaphthalene comprises: a reactor body, a reactor cover provided on the top of the reactor body, a stirring motor provided in the middle of the reactor cover, the stirring motor driving a stirring shaft to rotate, the stirring shaft passing through the reactor cover and extending into the reactor body; an inner stirring blade provided at the lower middle portion of the stirring shaft, a plurality of circumferentially evenly distributed transverse connecting rods provided at the upper portion of the stirring shaft, an outer shaft provided at the lower side of the other end of the transverse connecting rod, and an outer stirring blade provided on the outer shaft; two coils of heating pipes are further provided in the reactor body, the heating pipes being spiral coils and divided into an outer heating pipe and an inner heating pipe, the inner stirring blades being located inside the inner heating pipe, the outer stirring blades being located between the outer heating pipe and the inner heating pipe, and the outer heating pipe and the inner heating pipe being connected at the lower portion.

[0006] Preferably, the outer stirring blade is a twisted blade structure.

[0007] Preferably, the outer heating tube and the inner heating tube are further connected and fixed to a plurality of vertical support rods, and the lower ends of the support rods are fixed to the bottom of the reactor body.

[0008] Preferably, a rotating shaft is provided at the lower end of the inner stirring blade, and the rotating shaft is installed at the center of a bearing at the center of the reactor body.

[0009] Beneficial effects:

[0010] 1. By setting up inner stirring blades and outer stirring blades evenly distributed around the circumference, this stirring structure can ensure that the reactants are fully mixed in the reactor and improve the reaction efficiency. At the same time, the outer stirring blades with twisted blade structure and the spiral inner stirring blades can realize the upward and downward circulation of materials, making the stirring and heating faster and more uniform.

[0011] 2. The reactor body is equipped with two circles of heating tubes, one for the outer heating tube and the other for the inner heating tube. This design makes heating more uniform and avoids local overheating or overcooling. At the same time, the inner stirring blade is located inside the inner heating tube, and the outer stirring blade is located between the outer and inner heating tubes. This layout allows stirring and heating to cooperate with each other, further improving reaction efficiency.

[0012] 3. A rotating shaft is provided at the lower end of the inner stirring blade, which is installed at the center of the bearing in the center of the reactor body. This design makes the stirring blade more stable when rotating, reducing wear and noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Shows a schematic structural diagram of the utility model;

[0014] Figure 2 Shows the internal structure diagram of the utility model;

[0015] Figure 3 Shows the structure of the stirring blade of the utility model;

[0016] Figure 4 The figure shows the structure of the heating tube of the present invention. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0018] like Figures 1 to 4 The reactor shown is used for the preparation of 2-bromonaphthalene. The reactor body 1 is provided with a reactor cover 2 on the top. Various feeding ports are also provided on the reactor cover 2. This is a prior art solution and will not be elaborated on here. A discharge pipe 14 and multiple support legs 15 are provided at the bottom of the reactor body 1. A stirring motor 3 is provided in the middle of the reactor cover 2. The stirring motor 3 drives the stirring shaft 4 to rotate. The stirring shaft 4 passes through the reactor cover 2 and extends into the reactor body 1. An inner stirring blade 5 is provided at the lower middle portion of the stirring shaft 4. A plurality of transverse connecting rods 6 are evenly distributed around the circumference of the stirring shaft 4 are provided on the upper portion of the stirring shaft 4. An outer shaft 7 is provided on the lower side of the other end of the transverse connecting rod 6. The outer shaft 7 is provided with an outer stirring blade 8. This double-layer stirring blade design can more fully stir the reaction materials and improve the uniformity of the reaction.

[0019] There are also two circles of heating tubes in the reactor body 1. The heating tubes are spiral coils. The heating tubes are divided into an outer heating tube 10 and an inner heating tube 9. The inner stirring blade 5 is located on the inner side of the inner heating tube 9, and the outer stirring blade 8 is located between the outer heating tube 10 and the inner heating tube 9. The outer heating tube 10 is connected to the lower part of the inner heating tube 9, and the outer heating tube 10 is connected to an external heating device. This layout of the inner and outer heating tubes 10 can provide heat for the reaction more evenly, ensuring the stability and uniformity of the reaction temperature.

[0020] As a further improvement, the outer stirring blade 8 is a twisted blade structure to enhance the stirring effect and make the material mixed more fully. In actual application, the inner stirring blade 5 can be set to drive the material to turn upward, and the outer stirring blade 8 can be set to drive the material to turn downward, thereby achieving rapid upward and downward circulation of the material and improving the heating efficiency.

[0021] As a further improvement, the outer heating tube 10 and the inner heating tube 9 are further connected and fixed to a plurality of vertical support rods 11, and the lower ends of the support rods 11 are fixed to the bottom of the reactor body 1 to improve the stability of the heating tubes.

[0022] As a further improvement, a rotating shaft 12 is provided at the lower end of the inner stirring blade 5 , and the rotating shaft 12 is installed at the center of a bearing 13 at the center of the reactor body 1 to ensure the stability of the rotation of the inner stirring blade 5 .

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A reactor for the preparation of 2-bromonaphthalene, characterized in that: include: A reactor body, wherein a reactor cover is provided on the top of the reactor body, a stirring motor is provided in the middle of the reactor cover, the stirring motor drives the stirring shaft to rotate, and the stirring shaft passes through the reactor cover and penetrates into the reactor body; an inner stirring blade is provided at the lower middle part of the stirring shaft, and a plurality of transverse connecting rods uniformly distributed in a circle are provided on the upper part of the stirring shaft, an outer shaft is provided on the lower side of the other end of the transverse connecting rod, and an outer stirring blade is provided on the outer shaft; two circles of heating tubes are also provided in the reactor body, and the heating tubes are spiral coils, and the heating tubes are divided into outer heating tubes and inner heating tubes, the inner stirring blades are located on the inner side of the inner heating tube, the outer stirring blades are located between the outer heating tube and the inner heating tube, and the outer heating tube is connected to the lower part of the inner heating tube.

2. The reactor for preparing 2-bromonaphthalene according to claim 1, wherein The outer stirring blade is a twisted blade structure.

3. The reactor for preparing 2-bromonaphthalene according to claim 1, wherein The outer heating tube and the inner heating tube are further connected and fixed to a plurality of vertical support rods, and the lower ends of the support rods are fixed to the bottom of the reactor body.

4. The reactor for preparing 2-bromonaphthalene according to claim 1, wherein A rotating shaft is provided at the lower end of the inner stirring blade, and the rotating shaft is installed at the center of a bearing at the center of the reactor body.

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