O-methylbenzyl chloride production process and production system thereof

Abstract

The invention discloses an o-methylbenzyl chloride production process which comprises the following steps: S1, a chlorination section: pumping o-xylene into an evaporation kettle, heating, vaporizing the o-xylene in the kettle, enabling the vaporized o-xylene to enter a chlorination tower, introducing chlorine gas into the chlorination tower, and carrying out a chlorination reaction on the chlorine gas and rising o-xylene gas under the catalysis of visible light, the generated o-methylbenzyl chloride and o-dichlorobenzyl are in a liquid state and flow back into the evaporation kettle, the material crude benzyl in the kettle is transferred into a rectifying kettle, and hydrogen chloride gas generated by the reaction enters a hydrogen chloride absorption section. The supporting table, the feeding conveying belt, the discharging conveying belt and the rotatable transfer plate in the product tank conveying mechanism are matched with one another to form an efficient conveying system, after being placed on the feeding conveying belt, a finished product tank to be filled can be rapidly conveyed to the positions of the supporting table and the transfer plate, and through rotation of the transfer plate, the finished product tank to be filled can be rapidly conveyed to the supporting table and the transfer plate. And the finished product tanks can be accurately transferred to all stations, so that the conveying efficiency is greatly improved, and the manual carrying time and labor intensity are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of o-methylbenzyl chloride production, and in particular to an o-methylbenzyl chloride production process and a production system thereof. Background Art

[0002] The side chain of o-xylene undergoes gas phase substitution reaction with chlorine under slight negative pressure and visible light catalysis to generate crude methylbenzyl chloride and hydrogen chloride. After distillation and absorption, 99.0% methylbenzyl chloride, a small amount of dibenzyl chloride and 31% hydrochloric acid are generated respectively. The device consists of four sections: chlorination, distillation, hydrogen chloride (hydrochloric acid) absorption and distillation.

[0003] Reaction principle:

[0004]

[0005] The reaction is exothermic

[0006] The finished product of o-methylbenzyl chloride needs to be filled into packaging barrels through a filling machine. During the filling and capping of the finished cans, manual handling and operation are usually required, which is not only time-consuming and labor-intensive, but also prone to operational errors, affecting production progress and product quality. Summary of the invention

[0007] In order to solve the problems mentioned in the above background technology, the present invention provides a production process and a production system of o-methylbenzyl chloride.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A process for producing o-methylbenzyl chloride comprises the following steps:

[0010] S1: Chlorination Section

[0011] o-xylene is pumped into an evaporator for heating, and the o-xylene in the evaporator is vaporized and enters a chlorination tower, and chlorine gas is introduced into the chlorination tower to react with the rising o-xylene gas under the catalysis of visible light, and the generated o-methylbenzyl chloride and o-dibenzyl chloride are in liquid state and flow back into the evaporator, and the crude benzyl in the evaporator is transferred to a distillation kettle, and the hydrogen chloride gas generated by the reaction enters a hydrogen chloride absorption section;

[0012] S2: Distillation Section

[0013] After the crude benzyl is transferred to the distillation kettle, it is heated to 140°C to evaporate a small amount of unreacted o-xylene in the crude benzyl chloride, which is used as the raw material for the next batch. The temperature is raised to 170°C-190°C to evaporate o-methylbenzyl chloride;

[0014] S3: Filling

[0015] Filling the o-methylbenzyl chloride in the o-methylbenzyl chloride finished product can into the packaging barrel by a filling machine;

[0016] S4: Hydrogen chloride absorption

[0017] The tail gas (hydrogen chloride and excess o-xylene) at the top of the chlorination tower is condensed by a two-stage condenser, and the o-xylene is refluxed to the chlorination tower for chlorination reaction. The hydrogen chloride tail gas enters the chlorination tail gas condenser under a slightly negative pressure, and is further cooled by brine to separate the remaining very small amount of o-xylene, etc., and then enters the falling film absorber to obtain 31% hydrochloric acid by-product through pure water absorption. Finally, the tail gas is absorbed by the tail gas absorption device and discharged through a pipeline.

[0018] An o-methylbenzyl chloride production system comprises an evaporator, a chlorination tower, a distillation kettle, a filling unit, a chlorination tail gas condenser, a falling film absorber and a tail gas absorption device, wherein the filling unit comprises a filling machine and a product tank conveying mechanism;

[0019] The product can conveying mechanism includes a support platform, a loading conveyor belt and a unloading conveyor belt, the support platform is respectively provided with two first grooves, the loading conveyor belt and the unloading conveyor belt are respectively placed in the two first grooves, and the surfaces of the loading conveyor belt and the unloading conveyor belt are flush with the top of the support platform, a transfer plate is rotatably installed on the top of the support platform, four second grooves are provided on the transfer plate, a centering mechanism is provided on the top of the transfer plate, and the centering mechanism is used to adjust the position of the finished can, and the support platform is respectively surrounded by loading stations, filling stations, capping stations and unloading stations, the filling machine is correspondingly installed at the filling station, the loading conveyor belt is located at the loading station, the unloading conveyor belt is located at the unloading station, and the capping station is provided with a capping machine.

[0020] Preferably, a first gear is fixed on the mounting shaft of the transfer plate, a rotating motor is fixed on the top of the support platform, a second gear is fixed on the output shaft of the rotating motor, and the first gear is meshed with the second gear.

[0021] Preferably, the centering mechanism comprises a first swivel and a second swivel, four first clamping members are mounted on the first swivel, and four second clamping members are mounted on the second swivel.

[0022] Preferably, the first clamping member and the second clamping member form four pairs of clamping assemblies, and the four pairs of clamping assemblies are respectively and correspondingly located directly above the four second grooves.

[0023] Preferably, the first clamping member and the second clamping member are both arc-shaped plate structures, and the concave sides of the first clamping member and the second clamping member are opposite to each other, and the sides of the first clamping member and the second clamping member close to each other are both vertically protruded, and the vertical protrusions are made of rubber material.

[0024] Preferably, a bracket is fixed to the top of the transfer plate, a supporting disc is fixed on the bracket, a driving shaft is rotatably installed on the bottom end of the supporting disc, a third gear is fixed to the bottom end of the driving shaft, and a first arc-shaped rack and a second arc-shaped rack are respectively fixed to the tops of the first rotating ring and the second rotating ring.

[0025] Preferably, a fourth gear and a fifth gear are rotatably mounted on one side of the bottom end of the support disc close to the first arc-shaped rack, the fifth gear is located between the fourth gear and the third gear, and the three gears are meshed in sequence, and the fourth gear is meshed with the first arc-shaped rack.

[0026] Preferably, the sixth gear and the seventh gear are rotatably installed on one side of the bottom end of the support disc close to the second arc-shaped rack, and a reversing gear is also provided between the sixth gear and the seventh gear. The four are meshed in sequence, and the seventh gear is meshed with the second arc-shaped rack. The fifth gear has the same diameter as the sixth gear, and the fourth gear has the same diameter as the seventh gear.

[0027] Preferably, the top end of the driving shaft extends to above the supporting disc and is fixed with a driving shaft, a spiral groove is opened on the driving shaft, a push rod motor is fixed on the bracket, a horizontal lever is fixed on the output shaft of the push rod motor, and one end of the horizontal lever extends into the spiral groove.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The support table, loading conveyor belt, unloading conveyor belt and rotatable transfer plate in the product can conveying mechanism cooperate with each other to form an efficient conveying system. After the finished cans to be filled are placed on the loading conveyor belt, they can be quickly transported to the support table and transfer plate. Through the rotation of the transfer plate, the finished cans can be accurately transferred to each station, which greatly improves the conveying efficiency and reduces the time and labor intensity of manual handling.

[0030] 2. By driving the first rotating ring and the second rotating ring to rotate synchronously in opposite directions, the first clamping member and the second clamping member are driven to move synchronously toward or away from each other, thereby clamping and positioning the finished can. When the first clamping member and the second clamping member move synchronously toward each other, the finished can can be clamped, so that the position of the finished can remains stable during the canning and capping process, preventing leakage during the filling process and inability to accurately align during capping, thereby ensuring the quality of the product.

[0031] 3. Since the first clamping member and the second clamping member move synchronously when they move toward each other, the finished can is positioned exactly at the center of the second groove, which facilitates the filling machine and the capping machine to align the filling port. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 is a process flow chart of the present invention;

[0034] Figure 2 It is a three-dimensional diagram of the product tank conveying mechanism of the present invention;

[0035] Figure 3 A top view of the product tank conveying mechanism of the present invention;

[0036] Figure 4 It is a right side view of the product tank conveying mechanism of the present invention;

[0037] Figure 5 It is a three-dimensional diagram of the product tank conveying mechanism of the present invention (the loading conveyor belt and the unloading conveyor belt are omitted);

[0038] Figure 6 Figure 5 A zoomed-in detail of position A in the middle;

[0039] Figure 7 A top view of the support platform and transfer plate of the present invention;

[0040] Figure 8 It is a three-dimensional diagram of the product tank conveying mechanism of the present invention (the loading conveyor belt and the unloading conveyor belt are omitted);

[0041] Fig. 9 This is an exploded view of the support disc position of the present invention from a first perspective;

[0042] Fig.10 This is an exploded view of the support disc position of the present invention from a second viewing angle;

[0043] In the figure: 1. support platform; 101. first gear; 102. rotating motor; 103. second gear; 104. first groove; 2. transfer plate; 201. first rotating ring; 202. first rotating ring; 203. first clamping member; 204. second clamping member; 205. first arc-shaped rack; 206. second arc-shaped rack; 207. second groove; 3. bracket; 301. supporting disc; 302. driving shaft; 303. third gear; 3031. fourth gear; 3032. fifth gear; 3033. sixth gear; 3034. seventh gear; 3035. reversing gear; 304. driving shaft; 305. spiral groove; 306. push rod motor; 307. horizontal lever; 4. loading conveyor belt; 5. unloading conveyor belt; 6. finished can. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Example 1

[0046] Reference Figure 1 , a process for producing o-methylbenzyl chloride, comprising the following steps:

[0047] S1: Chlorination Section

[0048] o-xylene is pumped into an evaporator for heating, and the o-xylene in the evaporator is vaporized and enters a chlorination tower, and chlorine gas is introduced into the chlorination tower to react with the rising o-xylene gas under the catalysis of visible light, and the generated o-methylbenzyl chloride and o-dibenzyl chloride are in liquid state and flow back into the evaporator, and the crude benzyl in the evaporator is transferred to a distillation kettle, and the hydrogen chloride gas generated by the reaction enters a hydrogen chloride absorption section;

[0049] S2: Distillation Section

[0050] After the crude benzyl is transferred to the distillation kettle, it is heated to 140°C to evaporate a small amount of unreacted o-xylene in the crude benzyl chloride, which is used as the raw material for the next batch. The temperature is raised to 180°C to evaporate o-methylbenzyl chloride;

[0051] S3: Filling

[0052] Filling the o-methylbenzyl chloride in the o-methylbenzyl chloride finished product can into the packaging barrel by a filling machine;

[0053] S4: Hydrogen chloride absorption

[0054] The tail gas (hydrogen chloride and excess o-xylene) at the top of the chlorination tower is condensed by a two-stage condenser, and the o-xylene is refluxed to the chlorination tower for chlorination reaction. The hydrogen chloride tail gas enters the chlorination tail gas condenser under a slightly negative pressure, and is further cooled by brine to separate the remaining very small amount of o-xylene, etc., and then enters the falling film absorber to obtain 31% hydrochloric acid by-product through pure water absorption. Finally, the tail gas is absorbed by the tail gas absorption device and discharged through a pipeline.

[0055] Example 2

[0056] Reference Figure 2-10, an o-methylbenzyl chloride production system, comprising an evaporator, a chlorination tower, a distillation kettle, a filling unit, a chlorination tail gas condenser, a falling film absorber and a tail gas absorption device, wherein the filling unit comprises a filling machine and a product tank conveying mechanism;

[0057] The product can conveying mechanism includes a support platform 1, a loading conveyor belt 4 and a unloading conveyor belt 5. Two first grooves 104 are respectively provided on the support platform 1. The loading conveyor belt 4 and the unloading conveyor belt 5 are respectively placed in the two first grooves 104, and the surfaces of the loading conveyor belt 4 and the unloading conveyor belt 5 are flush with the top of the support platform 1. A transfer plate 2 is rotatably installed on the top of the support platform 1. Four second grooves 207 are provided on the transfer plate 2. A centering mechanism is provided on the top of the transfer plate 2. The centering mechanism is used to adjust the position of the finished can 6. A loading station, a filling station, a capping station and an unloading station are respectively provided around the support platform 1. The filling machine is correspondingly installed at the filling station, the loading conveyor belt 4 is located at the loading station, the unloading conveyor belt 5 is located at the unloading station, and a capping machine is provided at the capping station;

[0058] The finished can 6 to be filled is placed on the loading conveyor 4 and transported to the position of the support table 1 and the transfer plate 2 through the loading conveyor 4. The finished can 6 is just stuck in the first groove 104 and the second groove 207. The finished can 6 can be transferred to the filling station by driving the transfer plate 2 to rotate ninety degrees. At this time, the finished can 6 is canned by the filling machine. After the filling is completed, the transfer plate 2 is driven to continue to rotate ninety degrees to transfer the filled finished can 6 to the capping station. The filling port is sealed by the capping machine, and then the transfer plate 2 is driven to continue to rotate ninety degrees to transfer the finished can 6 to the unloading station. The finished can 6 is transferred to the unloading conveyor 5, so that the finished can 6 can be efficiently and continuously transferred to each station respectively, thereby improving the filling efficiency. The existence of the centering mechanism ensures that the finished can 6 will not be offset during the filling and capping process, prevents leakage during the filling process, and prevents alignment during capping.

[0059] Example 3

[0060] Reference Figure 2-10 , the difference between this embodiment and embodiment 2 is that a first gear 101 is fixed on the mounting shaft of the transfer plate 2, a rotating motor 102 is fixed on the top of the support platform 1, a second gear 103 is fixed on the output shaft of the rotating motor 102, and the first gear 101 is meshed with the second gear 103;

[0061] When the rotating motor 102 is turned on, the second gear 103 can be driven to rotate, and the transfer plate 2 can be driven to rotate by the engagement of the second gear 103 with the first gear 101, thereby transferring the finished can 6.

[0062] Example 4

[0063] Reference Figure 2-10The difference between this embodiment and embodiment 2 is that the centering mechanism includes a first rotating ring 201 and a second rotating ring 202, four first clamping members 203 are installed on the first rotating ring 201, and four second clamping members 204 are installed on the second rotating ring 202;

[0064] By driving the first rotating ring 201 and the second rotating ring 202 to rotate synchronously in opposite directions, the first clamping member 203 and the second clamping member 204 can be driven to move synchronously toward or away from each other. The first clamping member 203 and the second clamping member 204 form four pairs of clamping components, and the four pairs of clamping components are respectively located directly above the four second grooves 207. The first clamping member 203 and the second clamping member 204 are both arc-shaped plate structures, and the concave surfaces of the first clamping member 203 and the second clamping member 204 are directly facing each other. 03 and the second clamping member 204 have vertical protrusions on one side where they are close to each other, and the vertical protrusions are made of rubber. When the first clamping member 203 and the second clamping member 204 move close to each other synchronously, the finished can 6 can be clamped, so that the position of the finished can 6 remains stable during the canning and capping process. Moreover, since the first clamping member 203 and the second clamping member 204 move close to each other synchronously, the position of the finished can 6 can be ensured to be exactly at the center of the second groove 207, which is convenient for the filling machine and the capping machine to align the filling port.

[0065] Example 5

[0066] Reference Figure 2-10 The difference between this embodiment and embodiment 4 is that, in order to drive the first rotating ring 201 and the second rotating ring 202 to rotate synchronously in opposite directions, a bracket 3 is fixed to the top of the transfer plate 2, a supporting disc 301 is fixed on the bracket 3, a driving shaft 302 is rotatably installed on the bottom end of the supporting disc 301, a third gear 303 is fixed to the bottom end of the driving shaft 302, and a first arc-shaped rack 205 and a second arc-shaped rack 206 are fixed to the tops of the first rotating ring 201 and the second rotating ring 202 respectively.

[0067] Among them, the fourth gear 3031 and the fifth gear 3032 are rotatably installed on one side of the bottom end of the support disc 301 close to the first arc-shaped rack 205. The fifth gear 3032 is located between the fourth gear 3031 and the third gear 303, and the three are meshed in sequence. The fourth gear 3031 is meshed with the first arc-shaped rack 205.

[0068] Among them, the sixth gear 3303 and the seventh gear 3034 are rotatably installed on one side of the bottom end of the support disc 301 close to the second arc-shaped rack 206, and a reversing gear 3035 is also provided between the sixth gear 3303 and the seventh gear 3034. The four are meshed in sequence, and the seventh gear 3034 is meshed with the second arc-shaped rack 206. The fifth gear 3032 has the same diameter as the sixth gear 3303, and the fourth gear 3031 has the same diameter as the seventh gear 3034.

[0069] The top end of the driving shaft 302 extends to the top of the supporting disc 301 and is fixed with a driving shaft 304, on which a spiral groove 305 is provided, a push rod motor 306 is fixed on the bracket 3, and a horizontal lever 307 is fixed to the output shaft of the push rod motor 306, and one end of the horizontal lever 307 extends into the spiral groove 305;

[0070] When the push rod motor 306 is controlled to move up and down, since the horizontal lever 307 is inserted into the spiral groove 305, the vertical movement of the horizontal lever 307 drives the driving shaft 304 to rotate, and the driving shaft 304 drives the third gear 303 to rotate.

[0071] The driving power transmission path of the first arc-shaped rack 205 is: the third gear 303 to the fifth gear 3032 to the fourth gear 3031, and then to the first arc-shaped rack 205, which drives the first arc-shaped rack 205 to rotate through sequential meshing, thereby driving the first rotating ring 201 to rotate;

[0072] The driving power transmission path for the second arc-shaped rack 206 is: from the third gear 303 to the sixth gear 3303 to the reversing gear 3035 to the seventh gear 3034, and then to the second arc-shaped rack 206. Since the fifth gear 3032 and the sixth gear 3303 have the same diameter, the fourth gear 3031 and the seventh gear 3034 have the same diameter, and due to the existence of the reversing gear 3035, it is ensured that during the rotation of the third gear 303, the first arc-shaped rack 205 can be driven to rotate synchronously in the opposite direction, thereby achieving the effect of driving the first rotating ring 201 and the second rotating ring 202 to rotate synchronously in the opposite direction, thereby achieving the effect of centering.

[0073] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0074] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0075] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0076] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A system for producing o-methylbenzyl chloride, characterized in that: It includes an evaporating kettle, a chlorination tower, a distillation kettle, a filling unit, a chlorinated tail gas condenser, a falling film absorber and a tail gas absorption device, and the filling unit includes a filling machine and a product tank conveying mechanism; The product can conveying mechanism comprises a support platform (1), a loading conveyor belt (4) and a unloading conveyor belt (5), wherein two first grooves (104) are respectively provided on the support platform (1), the loading conveyor belt (4) and the unloading conveyor belt (5) are respectively placed in the two first grooves (104), and the surfaces of the loading conveyor belt (4) and the unloading conveyor belt (5) are flush with the top of the support platform (1), a transfer plate (2) is rotatably mounted on the top of the support platform (1), four second grooves (207) are provided on the transfer plate (2), a centering mechanism is provided on the top of the transfer plate (2), and the centering mechanism is used to adjust the position of the finished can (6), and a loading station, a filling station, a capping station and an unloading station are respectively provided around the support platform (1), a filling machine is correspondingly installed at the filling station, the loading conveyor belt (4) is located at the loading station, the unloading conveyor belt (5) is located at the unloading station, and a capping machine is provided at the capping station.

2. A system for producing o-methylbenzyl chloride according to claim 1, characterized in that: A first gear (101) is fixed on the mounting shaft of the transfer plate (2), a rotating motor (102) is fixed on the top of the support platform (1), a second gear (103) is fixed on the output shaft of the rotating motor (102), and the first gear (101) is meshed with the second gear (103).

3. A system for producing o-methylbenzyl chloride according to claim 1, characterized in that: The centering mechanism comprises a first rotating ring (201) and a second rotating ring (202); four first clamping members (203) are installed on the first rotating ring (201); and four second clamping members (204) are installed on the second rotating ring (202).

4. A system for producing o-methylbenzyl chloride according to claim 3, characterized in that: The first clamping member (203) and the second clamping member (204) form four pairs of clamping components, and the four pairs of clamping components are respectively located directly above the four second grooves (207).

5. A system for producing o-methylbenzyl chloride according to claim 4, characterized in that: The first clamping member (203) and the second clamping member (204) are both arc-shaped plate structures, and the concave sides of the first clamping member (203) and the second clamping member (204) are opposite to each other, and the sides of the first clamping member (203) and the second clamping member (204) close to each other are both vertically protruded, and the vertical protrusions are made of rubber material.

6. A system for producing o-methylbenzyl chloride according to claim 3, characterized in that: A bracket (3) is fixed on the top of the transfer plate (2), a supporting disc (301) is fixed on the bracket (3), a driving shaft (302) is rotatably mounted on the bottom end of the supporting disc (301), a third gear (303) is fixed on the bottom end of the driving shaft (302), and a first arc-shaped rack (205) and a second arc-shaped rack (206) are respectively fixed on the top ends of the first rotating ring (201) and the second rotating ring (202).

7. A system for producing o-methylbenzyl chloride according to claim 6, characterized in that: A fourth gear (3031) and a fifth gear (3032) are rotatably mounted on one side of the bottom end of the support disc (301) close to the first arc-shaped rack (205), the fifth gear (3032) is located between the fourth gear (3031) and the third gear (303), and the three gears are meshed in sequence, and the fourth gear (3031) is meshed with the first arc-shaped rack (205).

8. A system for producing o-methylbenzyl chloride according to claim 7, characterized in that: A sixth gear (3303) and a seventh gear (3034) are rotatably mounted on one side of the bottom end of the support disc (301) close to the second arc-shaped rack (206), and a reversing gear (3035) is also provided between the sixth gear (3303) and the seventh gear (3034). The four gears are meshed in sequence, and the seventh gear (3034) is meshed with the second arc-shaped rack (206). The fifth gear (3032) and the sixth gear (3303) have the same diameter, and the fourth gear (3031) and the seventh gear (3034) have the same diameter.

9. A system for producing o-methylbenzyl chloride according to claim 8, characterized in that: The top end of the driving shaft (302) extends to the top of the supporting disc (301) and is fixed with a driving shaft (304), a spiral groove (305) is provided on the driving shaft (304), a push rod motor (306) is fixed on the bracket (3), a horizontal lever (307) is fixed to the output shaft of the push rod motor (306), and one end of the horizontal lever (307) extends into the spiral groove (305).

10. A process for producing o-methylbenzyl chloride, using an o-methylbenzyl chloride production system according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Chlorination Section o-xylene is pumped into an evaporator for heating, and the o-xylene in the evaporator is vaporized and enters a chlorination tower, and chlorine gas is introduced into the chlorination tower to react with the rising o-xylene gas under the catalysis of visible light, and the generated o-methylbenzyl chloride and o-dibenzyl chloride are in liquid state and flow back into the evaporator, and the crude benzyl in the evaporator is transferred to a distillation kettle, and the hydrogen chloride gas generated by the reaction enters a hydrogen chloride absorption section; S2: Distillation Section After the crude benzyl is transferred to the distillation kettle, it is heated to 140°C to evaporate a small amount of unreacted o-xylene in the crude benzyl chloride, which is used as the raw material for the next batch. The temperature is raised to 170°C-190°C to evaporate o-methylbenzyl chloride; S3: Filling Filling the o-methylbenzyl chloride in the o-methylbenzyl chloride finished product can into the packaging barrel by a filling machine; S4: Hydrogen chloride absorption After the tail gas at the top of the chlorination tower is condensed by a two-stage condenser, o-xylene is refluxed to the chlorination tower for chlorination reaction. The hydrogen chloride tail gas enters the chlorination tail gas condenser under a slightly negative pressure, and is further cooled by brine to separate the very small amount of residual o-xylene, etc., and then enters the falling film absorber to obtain 31% hydrochloric acid by-product through pure water absorption. Finally, the tail gas is absorbed by the tail gas absorption device and discharged through a pipeline.

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