Production device and method for bromine reduction reaction

Abstract

The invention provides a bromine reduction reaction production device which comprises a bromine raw material storage tank assembly, a reducing agent storage tank assembly, a reduction reaction kettle assembly, a control box assembly, a discharge pump, a finished product connecting pipe, a condenser and a discharge connecting pipe, the bromine raw material storage tank assembly and the reducing agent storage tank assembly are respectively in bolted connection and communication with the reduction reaction kettle assembly. By means of automatic control, manual intervention is reduced, the reaction time is shortened, and the production efficiency is improved; meanwhile, production safety is guaranteed, and safety accidents caused by abnormal temperature and pressure are effectively avoided through the real-time monitoring and automatic alarming functions; the method has the remarkable advantages in the aspects of high efficiency, safety, environmental protection, operation simplicity and convenience, economic benefits and the like, is suitable for industrial large-scale production, and has wide market application prospects.

Description

Technical Field

[0001] The present invention belongs to the technical field of bromine production, and particularly relates to a production device and method for bromine reduction reaction. Background Art

[0002] Bromine is a kind of halogen, which is radioactive and has certain toxicity. It is widely used in the synthesis of organic compounds, pharmaceuticals, pigments, etc., and can also be used in military manufacturing, semiconductor industry and other fields. To prepare bromine, various processes can be adopted, and the most commonly used are the direct preparation and indirect preparation processes. One method is to produce bromine through a reduction reaction, which uses the neutralization reaction of bromide and hydroxide to prepare potassium bromate; the product of this reaction can be reduced to bromine by adding a reducing agent. For this method, the most commonly used reducing agent is ammonia, which can react with potassium bromate to produce multiple products such as ammonium chloride, ammonia water, water and bromine.

[0003] In addition, the Chinese patent publication number is CN, and the invention creation name is an electromagnet. However, the existing production equipment for bromine reduction reaction still has problems such as insufficient reaction process, affecting product purity, difficult to accurately control reaction conditions, potential safety hazards, and imperfect treatment of waste gas and waste liquid, resulting in serious environmental pollution.

[0004] In view of this, it is very necessary to invent a production device and method for bromine reduction reaction. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a production device and method for bromine reduction reaction, which significantly improves the efficiency of bromine reduction reaction, increases the reaction conversion rate, and shortens the reaction time by optimizing the reaction device and process parameters; at the same time, the stirring device and precise temperature and pressure control ensure sufficient contact of reactants, reduce the generation of by-products, and significantly improve the product purity.

[0006] A production device for bromine reduction reaction includes a bromine raw material storage tank assembly, a reducing agent storage tank assembly, a reduction reaction kettle assembly, a control box assembly, a discharge pump, a finished product connecting pipe, a condenser and a discharge connecting pipe. The bromine raw material storage tank assembly and the reducing agent storage tank assembly are respectively bolt-connected and communicated with the reduction reaction kettle assembly; the bromine raw material storage tank assembly, the reducing agent storage tank assembly and the reduction reaction kettle assembly are respectively electrically connected to the control box assembly; the discharge pump is connected to the lower part of the reduction reaction kettle assembly; the finished product connecting pipe is bolt-connected to the output end of the discharge pump; the discharge connecting pipe is thread-connected to the output end of the condenser; the condenser and the reduction reaction kettle assembly are connected by a pipeline.

[0007] Preferably, the bromine raw material storage tank assembly includes a bromine raw material storage tank body, a first connecting pipe, a first feeding pump, and a first feeding pipe. One end of the first connecting pipe is embedded in the lower right side of the bromine raw material storage tank body and is communicated with its interior, and the other end is bolted to the inlet end of the first feeding pump; the first feeding pipe is bolted to the outlet end of the first feeding pump; a mechanical control valve is bolted to the first connecting pipe.

[0008] Preferably, the reducing agent storage tank assembly includes a reducing agent storage tank body, a second connecting pipe, a second feeding pump, and a second feeding pipe. One end of the second connecting pipe is embedded in the lower left side of the reducing agent storage tank body and is communicated with its interior, and the other end is bolted to the inlet end of the second feeding pump; the second feeding pipe is bolted to the outlet end of the second feeding pump; a mechanical control valve is bolted to the second feeding pipe.

[0009] Preferably, the reduction reaction kettle assembly includes a reaction kettle body, a finished product discharge pipe, a right-side feeding connecting pipe, a left-side feeding connecting pipe, and a pressure gauge. The finished product discharge pipe is embedded in the middle position of the lower part of the reaction kettle body and is communicated with its interior; the right-side feeding connecting pipe is embedded in the upper right position of the reaction kettle body and is communicated with its interior; the left-side feeding connecting pipe is embedded in the upper left position of the reaction kettle body and is communicated with its interior; the pressure gauge is threadedly connected to the upper right side of the reaction kettle body and is communicated with its interior.

[0010] Preferably, a stirring device is bolted to the upper side inside the reaction kettle body, a heating cavity is arranged on the inner wall of the reaction kettle body, and a shunt plate structure is screwed to the upper side position inside the reaction kettle body.

[0011] Preferably, a heating pipe is embedded in the heating cavity, and temperature sensors are screwed to the lower left side and the upper right side inside the heating cavity respectively.

[0012] Preferably, the shunt plate structure includes a circular stainless steel plate and shunt drip pipes. The circular stainless steel plate is a circular stainless steel screen plate; the shunt drip pipes are respectively threadedly connected to the lower part of the circular stainless steel plate.

[0013] Preferably, a flushing connecting pipe is embedded in the upper front side of the reaction kettle body; a manhole door is also hingedly connected to the front part of the reaction kettle body.

[0014] Preferably, the finished product discharge pipe is arranged as an "L" stainless steel pipe, and a mechanical control valve is also arranged on the upper part of the finished product discharge pipe.

[0015] Preferably, the first feeding pipe is bolted to the left-side feeding connecting pipe; the second connecting pipe is bolted to the right-side feeding connecting pipe.

[0016] Preferably, the main body of the bromine raw material storage tank is connected to the inside of the main body of the reaction kettle through a first connecting pipe, a first feeding pump, a first feeding pipe and a left feeding connecting pipe.

[0017] Preferably, the main body of the reducing agent storage tank is connected to the inside of the main body of the reaction kettle through a second connecting pipe, a second feeding pump, a second feeding pipe and a right feeding connecting pipe.

[0018] Preferably, the main body of the reaction kettle is connected to the inside through a finished product discharge pipe, a discharge pump and a finished product connecting pipe.

[0019] Preferably, a temperature control system, a pressure control system, an automatic control system, a human-machine interaction interface and a data storage and analysis module are arranged inside the control box assembly.

[0020] A production method for bromine reduction reaction specifically includes the following steps: Step 1: Add raw materials to the main body of the reaction kettle in proportion; Step 2: Start the stirring device; Step 3: Perform temperature increase and pressure increase treatment; Step 4: Treat the tail gas; Step 5: Treat the reaction completion.

[0021] Preferably, in Step 1, the bromine raw material in the main body of the bromine raw material storage tank is passed through the first connecting pipe, the first feeding pipe and the left feeding connecting pipe to the inside of the main body of the reaction kettle through the first feeding pump; the reducing agent in the main body of the reducing agent storage tank is passed through the second connecting pipe, the second feeding pump, the second feeding pipe and the right feeding connecting pipe to the inside of the main body of the reaction kettle through the second feeding pump; wherein the molar ratio of the bromine raw material to the reducing agent is 1:1.2 - 1.5, preferably 1:1.3.

[0022] Preferably, in Step 2, the stirring speed of the stirring device is 200 - 400 rpm, preferably 300 rpm, to fully mix the bromine raw material and the reducing agent.

[0023] Preferably, in Step 3, the temperature inside the main body of the reaction kettle is controlled at 50 - 80 °C, preferably 65 °C, through the temperature control system of the control box assembly, and the pressure inside the main body of the reaction kettle is maintained at 0.1 - 0.5 MPa, preferably 0.3 MPa, through the pressure control system.

[0024] Preferably, in Step 4, the waste gas generated during the reaction is condensed by a condenser and then enters the absorption tower for treatment. The temperature of the condenser is -10 °C to 5 °C, preferably 0 °C, and a 10% sodium hydroxide solution is used as the absorbent inside the absorption tower.

[0025] Preferably, in step five, the feeding is stopped through an automated control system, the reaction product is discharged, and the equipment is cleaned and maintained. The reaction time is 2 - 4 hours, preferably 3 hours.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. High efficiency and high conversion rate: By optimizing the reaction device and process parameters, the present invention significantly improves the efficiency of the bromine reduction reaction. The reaction conversion rate reaches over 98%, and the reaction time is shortened to 2 - 4 hours (preferably 3 hours). Compared with the traditional process, the efficiency is increased by about 20% - 30%. At the same time, the stirring device and precise temperature and pressure control ensure sufficient contact of the reactants, reduce the generation of by-products, and significantly improve the product purity.

[0027] 2. Enhanced safety: An automated control system is adopted to achieve precise control of the reaction process, including real-time monitoring and adjustment of key parameters such as temperature, pressure, and feeding ratio. The pressure control system is equipped with a pressure relief valve to ensure that the pressure in the reaction kettle is always within the safe range (0.1 - 0.5 MPa), avoiding the explosion risk caused by excessive pressure. In addition, the waste gas treatment system effectively reduces the leakage of toxic gases (such as hydrogen bromide), further ensuring the safety of operators.

[0028] 3. Excellent environmental protection performance: The waste gas treatment system uses double treatment of a condenser and an absorption tower, and the waste gas treatment efficiency reaches over 99%. The temperature of the condenser is controlled between -10°C and 5°C (preferably 0°C), and a 10% sodium hydroxide solution is used as the absorbent in the absorption tower to effectively neutralize acidic gases. The waste liquid treatment system controls the pH value of the waste liquid between 6 - 8 through a neutralization tank and a filtration device, meeting the environmental protection discharge standards and significantly reducing environmental pollution.

[0029] 4. Simple operation and wide applicability: The device has a reasonable structural design, high automation, simple operation, reduces manual intervention, and reduces the risk of operation difficulty and human error. At the same time, the device is applicable to the reactions of various reducing agents (such as hydrogen, sulfides, etc.) with bromine, has wide applicability, and can meet different production requirements.

[0030] 5. Significant economic benefits: By improving the reaction efficiency, reducing the generation of by-products, and lowering energy consumption, the production cost of the present invention is reduced by about 15% - 20% compared with the traditional process. In addition, the optimization of the waste gas and waste liquid treatment systems reduces the environmental protection treatment costs, further enhancing the economic benefits.

[0031] In summary, the production device and method for the bromine reduction reaction of the present invention can improve production efficiency: through automatic control, manual intervention is reduced, the reaction time is shortened, and production efficiency is improved; at the same time, production safety is ensured: real-time monitoring and automatic alarm functions effectively avoid safety accidents caused by abnormal temperature and pressure; and the operation difficulty is reduced: the human-machine interface is intuitive and easy to use, and operators can complete production operations without high professional skills; it has the ability to support process optimization: through data storage and analysis functions, it provides a scientific basis for process optimization; it has significant advantages in terms of high efficiency, safety, environmental protection, ease of operation, and economic benefits, is suitable for large-scale industrial production, and has broad market application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of the present invention.

[0033] Figure 2 is a schematic structural diagram of the interior of the present invention.

[0034] Figure 3 is a schematic structural diagram of the bromine raw material storage tank assembly of the present invention.

[0035] Figure 4 is a schematic structural diagram of the reducing agent storage tank assembly of the present invention.

[0036] Figure 5 is a schematic structural diagram of the reduction reaction kettle assembly of the present invention.

[0037] Figure 6 is a schematic internal structure diagram of the reaction kettle main body of the present invention.

[0038] Figure 7 is a schematic structural diagram of the flow dividing plate structure of the present invention.

[0039] Figure 8 is a schematic process flow framework diagram of the production method of the present invention.

[0040] In the figure: 1. Bromine raw material storage tank assembly; 11. Bromine raw material storage tank main body; 12. First connecting pipe; 13. First feeding pump; 14. First feeding pipe; 2. Reducing agent storage tank assembly; 21. Reducing agent storage tank main body; 22. Second connecting pipe; 23. Second feeding pump; 24. Second feeding pipe; 3. Reduction reaction kettle assembly; 31. Reaction kettle main body; 32. Finished product discharge pipe; 33. Right-side feeding connection pipe; 34. Left-side feeding connection pipe; 35. Pressure gauge; 36. Stirring device; 37. Heating cavity; 371. Heating pipe; 372. Temperature sensor; 38. Flow dividing plate structure; 381. Circular stainless steel plate; 382. Flow dividing dropper; 4. Control box assembly; 5. Discharge pump; 6. Finished product connecting pipe; 7. Condenser; 8. Discharge connecting pipe. Detailed implementation mode

[0041] The present invention will be further described below with reference to the accompanying drawings: Embodiment

[0042] As shown in the attached Figure 1 to the attached Figure 2 As shown, the present invention provides a production device and method for bromine reduction reaction, including a bromine raw material storage tank assembly 1, a reducing agent storage tank assembly 2, a reduction reaction kettle assembly 3, a control box assembly 4, a discharge pump 5, a finished product connecting pipe 6, a condenser 7 and a discharge connecting pipe 8. The bromine raw material storage tank assembly 1 and the reducing agent storage tank assembly 2 are respectively bolt-connected and communicated with the reduction reaction kettle assembly 3; the bromine raw material storage tank assembly 1, the reducing agent storage tank assembly 2 and the reduction reaction kettle assembly 3 are respectively electrically connected to the control box assembly 4; the discharge pump 5 is connected to the lower part of the reduction reaction kettle assembly 3; the finished product connecting pipe 6 is bolt-connected to the output end of the discharge pump 5; the discharge connecting pipe 8 is thread-connected to the output end of the condenser 7; a pipeline is connected and arranged between the condenser 7 and the reduction reaction kettle assembly 3.

[0043] As shown in the attached Figure 3 As shown, in the above implementation scheme, specifically, the bromine raw material storage tank assembly 1 includes a bromine raw material storage tank main body 11, a first connecting pipe 12, a first feeding pump 13 and a first feeding pipe 14. One end of the first connecting pipe 12 is embedded in the lower right side of the bromine raw material storage tank main body 11 and communicated with its interior, and the other end is bolt-connected to the inlet end of the first feeding pump 13; the first feeding pipe 14 is bolt-connected to the output end of the first feeding pump 13; a mechanical control valve is bolt-connected to the first connecting pipe 12.

[0044] As shown in the attached Figure 4 As shown, in the above implementation scheme, specifically, the reducing agent storage tank assembly 2 includes a reducing agent storage tank main body 21, a second connecting pipe 22, a second feeding pump 23 and a second feeding pipe 24. One end of the second connecting pipe 22 is embedded in the lower left side of the reducing agent storage tank main body 21 and communicated with its interior, and the other end is bolt-connected to the inlet end of the second feeding pump 23; the second feeding pipe 24 is bolt-connected to the output end of the second feeding pump 23; a mechanical control valve is bolt-connected to the second feeding pipe 24.

[0045] As shown in the attached Figure 5 and attached Figure 6As shown, in the above embodiments, specifically, the reduction reactor assembly 3 includes a reactor main body 31, a finished product discharge pipe 32, a right-side feed connection pipe 33, a left-side feed connection pipe 34, and a pressure gauge 35. The finished product discharge pipe 32 is embedded in the middle position at the lower part of the reactor main body 31 and is in communication with its interior; the right-side feed connection pipe 33 is embedded in the upper right position of the reactor main body 31 and is in communication with its interior; the left-side feed connection pipe 34 is embedded in the upper left position of the reactor main body 31 and is in communication with its interior; the pressure gauge 35 is threadedly connected to the upper right side of the reactor main body 31 and is in communication with its interior; a stirring device 36 is bolted to the upper side inside the reactor main body 31, a heating chamber 37 is provided on the inner wall of the reactor main body 31, and a flow dividing plate structure 38 is screwed to the upper side inside the reactor main body 31; a heating pipe 371 is embedded in the heating chamber 37, and temperature sensors 372 are screwed to the lower left side and upper right side respectively inside the heating chamber 37.

[0046] As shown in the Figure 7 attachment, in the above embodiments, specifically, the flow dividing plate structure 38 includes a circular stainless steel plate 381 and flow dividing droppers 382. The circular stainless steel plate 381 is a circular stainless steel screen plate; the flow dividing droppers 382 are respectively threadedly connected to the lower part of the circular stainless steel plate 381.

[0047] In the above embodiments, specifically, a flushing connection pipe is embedded in the upper front part of the reactor main body 31; a manhole door is also hingedly connected to the front part of the reactor main body 31.

[0048] In the above embodiments, specifically, the finished product discharge pipe 32 is provided as an "L" stainless steel pipe, and a mechanical control valve is also provided on the upper part of the finished product discharge pipe 32.

[0049] In the above embodiments, specifically, the first feed pipe 14 is bolted to the left-side feed connection pipe 34; the second communication pipe 22 is bolted to the right-side feed connection pipe 33.

[0050] In the above embodiments, specifically, the bromine raw material storage tank main body 11 is in communication with the interior of the reactor main body 31 through the first communication pipe 12, the first feed pump 13, the first feed pipe 14, and the left-side feed connection pipe 34.

[0051] In the above embodiments, specifically, the reducing agent storage tank main body 21 is in communication with the interior of the reactor main body 31 through the second communication pipe 22, the second feed pump 23, the second feed pipe 24, and the right-side feed connection pipe 33; the interior of the reactor main body 31 is in communication through the finished product discharge pipe 32, the discharge pump 5, and the finished product connection pipe 6.

[0052] In the above embodiments, specifically, a temperature control system, a pressure control system, an automatic control system, a human-machine interface, and a data storage and analysis module are provided inside the control box assembly 4.

[0053] As shown in the Figure 8 accompanying drawings, a production method for bromine reduction reaction specifically includes the following steps: Step 1: Add raw materials to the reaction kettle body in proportion: The bromine raw materials in the bromine raw material storage tank body are fed into the inside of the reaction kettle body through the first connecting pipe, the first feeding pipe, and the left feeding connecting pipe by the first feeding pump; the reducing agent in the reducing agent storage tank body is fed into the inside of the reaction kettle body through the second connecting pipe, the second feeding pump, the second feeding pipe, and the right feeding connecting pipe by the second feeding pump; where the molar ratio of bromine raw materials to the reducing agent is 1:1.2 - 1.5, preferably 1:1.3.

[0054] Step 2: Start the stirring device: The stirring speed of the stirring device is 200 - 400 rpm, preferably 300 rpm, to fully mix the bromine raw materials and the reducing agent.

[0055] Step 3: Temperature increase and pressure increase treatment: The temperature inside the reaction kettle body is controlled at 50 - 80 °C, preferably 65 °C, through the temperature control system of the control box assembly, and the pressure inside the reaction kettle body is maintained at 0.1 - 0.5 MPa, preferably 0.3 MPa, through the pressure control system.

[0056] Step 4: Treatment of tail gas: The waste gas generated during the reaction is condensed by a condenser and then enters the absorption tower for treatment. The temperature of the condenser is -10 °C to 5 °C, preferably 0 °C, and a 10% sodium hydroxide solution is used as the absorbent inside the absorption tower.

[0057] Step 5: Treatment after the reaction is completed: Stop feeding through the automatic control system, discharge the reaction products, and perform equipment cleaning and maintenance. The reaction time is 2 - 4 hours, preferably 3 hours. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0058] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A production device for bromine reduction reaction, characterized in that, The production device for the bromine reduction reaction includes a bromine raw material storage tank assembly (1), a reducing agent storage tank assembly (2), a reduction reaction kettle assembly (3), a control box assembly (4), a discharge pump (5), a finished product connecting pipe (6), a condenser (7) and a discharge connecting pipe (8). The bromine raw material storage tank assembly (1) and the reducing agent storage tank assembly (2) are respectively bolted and communicated with the reduction reaction kettle assembly (3); the bromine raw material storage tank assembly (1), the reducing agent storage tank assembly (2) and the reduction reaction kettle assembly (3) are respectively electrically connected to the control box assembly (4); the discharge pump (5) is connected to the lower part of the reduction reaction kettle assembly (3); the finished product connecting pipe (6) is bolted to the output end of the discharge pump (5); the discharge connecting pipe (8) is threadedly connected to the output end of the condenser (7); a pipeline is connected and arranged between the condenser (7) and the reduction reaction kettle assembly (3).

2. The production device for the bromine reduction reaction according to claim 1, wherein, The bromine raw material storage tank assembly (1) includes a bromine raw material storage tank main body (11), a first connecting pipe (12), a first feeding pump (13) and a first feeding pipe (14). One end of the first connecting pipe (12) is embedded in the lower right side of the bromine raw material storage tank main body (11) and communicated with its interior, and the other end is bolted to the inlet end of the first feeding pump (13); the first feeding pipe (14) is bolted to the output end of the first feeding pump (13); a mechanical control valve is bolted to the first connecting pipe (12).

3. The production device for bromine reduction reaction according to claim 1, characterized in that, The reducing agent storage tank assembly (2) includes a reducing agent storage tank main body (21), a second connecting pipe (22), a second feeding pump (23) and a second feeding pipe (24). One end of the second connecting pipe (22) is embedded in the lower left side of the reducing agent storage tank main body (21) and communicated with its interior, and the other end is bolted to the inlet end of the second feeding pump (23); the second feeding pipe (24) is bolted to the output end of the second feeding pump (23); a mechanical control valve is bolted to the second feeding pipe (24).

4. The production device for bromine reduction reaction according to claim 1, wherein, The reduction reaction kettle assembly (3) includes a reaction kettle main body (31), a finished product discharge pipe (32), a right-side feeding connecting pipe (33), a left-side feeding connecting pipe (34) and a pressure gauge (35). The finished product discharge pipe (32) is embedded in the middle position of the lower part of the reaction kettle main body (31) and communicated with its interior; the right-side feeding connecting pipe (33) is embedded in the upper right side position of the reaction kettle main body (31) and communicated with its interior; the left-side feeding connecting pipe (34) is embedded in the upper left side position of the reaction kettle main body (31) and communicated with its interior; the pressure gauge (35) is threadedly connected to the upper right side of the reaction kettle main body (31) and communicated with its interior.

5. The production device for bromine reduction reaction according to claim 4, characterized in that, A stirring device (36) is bolted to the upper side inside the reaction kettle main body (31), a heating cavity (37) is arranged on the inner wall of the reaction kettle main body (31), and a shunt plate structure (38) is screwed to the upper side position inside the reaction kettle main body (31).

6. The production device for bromine reduction reaction according to claim 5, characterized in that, Inside the described heating chamber (37), a heating tube (371) is inlaid, and temperature sensors (372) are respectively screwed to the lower left side and upper right side inside the heating chamber (37).

7. The production device and method for bromine reduction reaction according to claim 5, characterized in that, The described flow dividing plate structure (38) includes a circular stainless steel plate (381) and flow dividing droppers (382). The circular stainless steel plate (381) is a circular stainless steel screen plate; the flow dividing droppers (382) are respectively threadedly connected to the lower part of the circular stainless steel plate (381).

8. The production method of the production device for bromine reduction reaction according to claim 1, characterized in that, Specifically, it includes the following steps: Step 1: Add raw materials to the reaction kettle body in proportion; Step 2: Start the stirring device; Step 3: Perform temperature increase and pressure increase treatment; Step 4: Treat the tail gas; Step 5: Treat the completion of the reaction.

9. The production method of the production device for the bromine reduction reaction according to claim 8, characterized in that, In the described Step 2, the stirring speed of the stirring device is 200 - 400 rpm, preferably 300 rpm, to fully mix the bromine raw material and the reducing agent.

10. The production method of the production device for bromine reduction reaction according to claim 8, characterized in that, In the described Step 3, the temperature inside the reaction kettle body is controlled at 50 - 80 °C, preferably 65 °C, by the temperature control system of the control box assembly, and the pressure inside the reaction kettle body is maintained at 0.1 - 0.5 MPa, preferably 0.3 MPa, by the pressure control system.

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