Methyl chlorination device for p-chlorobenzotrifluoride production

Abstract

The utility model provides a methyl chlorination device for producing p-chlorobenzotrifluoride, which belongs to the field of chemical engineering devices and comprises a circular reaction component, a reaction component and a reaction component, the circular reaction assembly comprises a rotating pipe which penetrates through the upper cover and is rotationally connected with the upper cover, a transverse pipe is fixedly connected to the bottom of the rotating pipe, a plurality of through holes are formed in the upper end of the transverse pipe in a penetrating mode, a net plate is fixedly connected to the rotating pipe, a draught fan is installed on the upper cover, and the air inlet end of the draught fan is connected with the reaction kettle through an air inlet pipe. A feeding pipe is mounted on the air inlet pipe, a first electromagnetic valve is mounted on the air inlet pipe, and a second electromagnetic valve is mounted on the feeding pipe. According to the utility model, as the transverse pipe rotates, reaction gases are sprayed out spirally, so that the reaction gases are fully mixed, and the fan works to enable the reaction gases to circularly flow, so that the gases can be fully and effectively mixed, the mixing quality is ensured, and the production quality of p-chlorobenzotrifluoride can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a methyl chlorination device for producing para-chlorotrifluorotoluene. Background Art

[0002] Parachlorobenzotrifluoride can be prepared by a variety of methods, among which the most commonly used method is to obtain parachlorobenzotrichloride by chlorination reaction of parachlorotoluene and chlorine, and then obtain parachlorobenzotrichloride by fluorination reaction of parachlorobenzotrichloride and hydrogen fluoride; the specific process is: parachlorotoluene and chlorine are mixed and heated, and chlorination reaction is carried out to generate parachlorobenzotrichloride; parachlorobenzotrichloride and hydrogen fluoride are mixed and heated, and pressurized to generate parachlorobenzotrifluoride.

[0003] At present, most of the methyl chlorination devices for producing para-chlorobenzotrifluoride directly charge chlorine and hydrogen fluoride into the reactor for reaction. However, since chlorine and hydrogen fluoride are gases, part of the chlorine and hydrogen fluoride are located on the upper side, which makes them unable to react completely. Therefore, the present application proposes a methyl chlorination device for producing para-chlorobenzotrifluoride. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a methyl chlorination device for producing para-chlorotrifluorotoluene.

[0005] The embodiment of the utility model provides a methyl chlorination device for producing parachlorobenzotrifluoride, comprising:

[0006] A reaction kettle, wherein an upper cover is installed at the upper end of the reaction kettle;

[0007] A circulating reaction component; the circulating reaction component includes a rotating tube that passes through the upper cover and is rotatably connected thereto, a horizontal tube is fixedly connected to the bottom of the rotating tube, a plurality of through holes are penetrated through the upper end of the horizontal tube, a mesh plate is fixedly connected to the rotating tube, a fan is installed on the upper cover, the air inlet end of the fan is connected to the reactor through an air inlet pipe, the air outlet end of the fan is rotatably connected to the rotating tube through a reflux pipe, a feed pipe is installed on the air inlet pipe, a first solenoid valve is installed on the air inlet pipe, and a second solenoid valve is installed on the feed pipe.

[0008] Furthermore, it also includes a driving mechanism installed on the upper cover to drive the rotating tube to rotate, the driving mechanism includes a mounting plate installed on the upper cover, a motor is installed on the mounting plate, bevel gears are installed on the output end of the motor and the rotating tube, and the two bevel gears are meshed.

[0009] Furthermore, a rotary joint is installed on the rotating tube, and the return pipe is fixedly connected to the rotary joint.

[0010] Furthermore, the feed pipe is located between the fan and the first solenoid valve.

[0011] Furthermore, the air inlet pipe is arranged close to the upper cover.

[0012] Furthermore, the mesh plate is located above the transverse tube.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In the utility model, due to the rotation of the horizontal tube, the reaction gas is ejected in a spiral shape, so that the reaction gases can be fully mixed, and the operation of the fan makes the reaction gas circulate, thereby ensuring that the gas can be fully and effectively mixed, ensuring the mixing quality, and thus ensuring the production quality of parachlorotrifluorotoluene. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a methyl chlorination device for producing para-chlorotrifluorotoluene described in an embodiment of the utility model.

[0016] Figure 2 This is a schematic diagram of the motor in a methyl chlorination device for producing parachlorotrifluorotoluene described in an embodiment of the utility model.

[0017] Figure 3 It is a schematic diagram of a horizontal pipe in a methyl chlorination device for producing para-chlorotrifluorotoluene described in an embodiment of the utility model.

[0018] In the above drawings: 1 reactor, 2 upper cover, 3 mounting plate, 4 motor, 5 bevel gear, 6 rotary joint, 7 reflux pipe, 8 fan, 9 air inlet pipe, 10 first solenoid valve, 11 feed pipe, 12 second solenoid valve, 13 rotating pipe, 14 mesh plate, 15 horizontal pipe, 16 through hole. DETAILED DESCRIPTION

[0019] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1-Figure 3 As shown, the embodiment of the utility model provides a methyl chlorination device for producing parachlorobenzotrifluoride, comprising:

[0021] Reactor 1, wherein the temperature rise and pressure reaction of para-chlorotrichlorotoluene, chlorine gas and hydrogen fluoride in the reactor 1 are all prior art and will not be described in detail in this part;

[0022] The bottom of the reactor 1 is provided with a drain pipe, which is not shown in the figure; the upper end of the reactor 1 is provided with an upper cover 2, which has an addition port, which is sealed, and the addition port is not shown in the figure. The above are all prior art;

[0023] Circulating reaction assembly; the circulating reaction assembly includes a rotating tube 13 that penetrates the upper cover 2 and is rotatably connected thereto, and also includes a driving mechanism installed on the upper cover 2 to drive the rotating tube 13 to rotate, the driving mechanism includes a mounting plate 3 installed on the upper cover 2, a motor 4 is installed on the mounting plate 3, a bevel gear 5 is installed on the output end of the motor 4 and the rotating tube 13, the two bevel gears 5 are meshed, the motor 4 works to drive the bevel gear 5 to rotate, thereby realizing the rotation of the rotating tube 13, and the rotation of the rotating tube 13 drives the mesh plate 14 and the horizontal tube 15 to rotate;

[0024] A horizontal tube 15 is fixedly connected to the bottom of the rotating tube 13, and a plurality of through holes 16 are penetrated through the upper end of the horizontal tube 15. A mesh plate 14 is fixedly connected to the rotating tube 13, and the mesh plate 14 is located above the horizontal tube 15. After the reaction gas passes through the rotating mesh plate 14, the reaction gas can be dispersed. After the reaction gas is dispersed through the mesh plate 14, it is mixed again, so as to further improve the mixing effect and quality of the reaction gas.

[0025] A fan 8 is installed on the upper cover 2, and the air inlet end of the fan 8 is connected to the reactor 1 through an air inlet pipe 9, and the air inlet pipe 9 is arranged close to the upper cover 2; the air outlet end of the fan 8 is rotatably connected to the rotating tube 13 through a return pipe 7, and a rotating joint 6 is installed on the rotating tube 13, and the return pipe 7 is fixedly connected to the rotating joint 6;

[0026] A feed pipe 11 is installed on the air inlet pipe 9, a first solenoid valve 10 is installed on the air inlet pipe 9, a second solenoid valve 12 is installed on the feed pipe 11, and the feed pipe 11 is located between the fan 8 and the first solenoid valve 10; when in use, the second solenoid valve 12 is opened and the first solenoid valve 10 is closed, and then the feed pipe 11 is connected to the external chlorine or hydrogen fluoride gas supply pipe, and the fan 8 and the motor 4 are started. The motor 4 drives the bevel gear 5 to rotate, thereby realizing the rotation of the rotating tube 13. The rotation of the rotating tube 13 drives the mesh plate 14 and the cross tube 15 to rotate. The fan 8 can transport the gas to the cross tube 15 through the reflux pipe 7 and the rotating tube 13, and finally spray it through the through hole 16. Due to the rotation of the cross tube 15, the reaction gas is sprayed in a spiral shape, so that the reaction gases can be fully mixed; then the first solenoid valve 10 is opened and the second solenoid valve 12 is closed, and the fan 8 works to make the reaction gas circulate, thereby ensuring that the gas can be fully and effectively mixed, ensuring the quality of the mixing, and thus ensuring the quality of the production of para-chlorotrifluorotoluene.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A methyl chlorination device for producing parachlorobenzotrifluoride, characterized in that: include: A reaction kettle (1), wherein an upper cover (2) is installed at the upper end of the reaction kettle (1); A circulating reaction component; the circulating reaction component comprises a rotating tube (13) penetrating through an upper cover (2) and rotatably connected thereto; a transverse tube (15) is fixedly connected to the bottom of the rotating tube (13); a plurality of through holes (16) are penetrated through the upper end of the transverse tube (15); a mesh plate (14) is fixedly connected to the rotating tube (13); a fan (8) is installed on the upper cover (2); an air inlet end of the fan (8) is connected to a reaction kettle (1) through an air inlet pipe (9); an air outlet end of the fan (8) is rotatably connected to the rotating tube (13) through a return pipe (7); a feed pipe (11) is installed on the air inlet pipe (9); a first solenoid valve (10) is installed on the air inlet pipe (9); and a second solenoid valve (12) is installed on the feed pipe (11).

2. A methyl chlorination device for producing parachlorobenzotrifluoride according to claim 1, characterized in that: in: It also includes a driving mechanism installed on the upper cover (2) for driving the rotating tube (13) to rotate, the driving mechanism including a mounting plate (3) installed on the upper cover (2), a motor (4) installed on the mounting plate (3), a bevel gear (5) installed on the output end of the motor (4) and the rotating tube (13), and the two bevel gears (5) meshing with each other.

3. A methyl chlorination device for producing parachlorobenzotrifluoride according to claim 1, characterized in that: in: A rotary joint (6) is installed on the rotating tube (13), and the return pipe (7) is fixedly connected to the rotary joint (6).

4. A methyl chlorination device for producing parachlorobenzotrifluoride according to claim 1, characterized in that: in: The feed pipe (11) is located between the fan (8) and the first solenoid valve (10).

5. A methyl chlorination device for producing parachlorobenzotrifluoride according to claim 1, characterized in that: in: The air inlet pipe (9) is arranged close to the upper cover (2).

6. A methyl chlorination device for producing parachlorobenzotrifluoride according to claim 1, characterized in that: in: The mesh plate (14) is located above the transverse tube (15).

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