Continuous flow production equipment for benzohydroxamic acid
By designing a continuous flow production equipment, combined with a detachable stirring rod and insulation pipe, the problems of the existing equipment being unable to produce continuously and the stirring device being inconvenient to maintain were solved, thus achieving efficient production of benzohydroxyxamic acid.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 河南德峰新材料有限公司
- Filing Date
- 2025-04-19
- Publication Date
- 2026-05-15
AI Technical Summary
Existing benzohydroxyxamic acid production facilities cannot achieve continuous production, resulting in low efficiency, and the stirring device is inconvenient to disassemble, maintain or replace.
A continuous flow production equipment including a mixing reactor, an acidification reactor, a crystallizer, a hydrocyclone, and a dryer was designed. The production efficiency is improved by the detachable design of the stirring rod and the use of insulation pipes. Pipelines and pumps are set between the reactors for material transfer, and membrane separation technology and dynamic and static mixers are combined for reaction control.
This technology enables continuous production of benzohydroxyxamic acid, improves production efficiency, reduces material transfer time, and facilitates the maintenance and replacement of the mixing device.
Smart Images
Figure CN224236811U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of benzyl hydroxamic acid production technology, specifically to a continuous flow production equipment for benzyl hydroxamic acid. Background Technology
[0002] Benzyl hydroxyxamic acid, also known as benzo[a]oxime acid, is a white to pale yellow solid powder. It is an organic compound with a variety of uses, and has important applications in organic synthesis, flotation agents, protecting groups, antioxidants, and food additives.
[0003] As disclosed in application number 201820161318.1, an apparatus for producing benzohydroxyxamic acid includes a tank body and a tank cover. The tank body is equipped with a jacket, and the tank cover is equipped with a stirring motor. The stirring motor is connected to a stirring shaft that extends into the tank body, and the stirring shaft is equipped with stirring blades. The tank cover has two material addition ports on each side of the stirring motor. The upper part of one side of the tank body has a steam inlet that connects to the jacket, and the opposite side has a steam outlet that connects to the jacket. The upper part of one side of the tank body has several cooling pipes that penetrate the jacket and extend into the tank body. The cooling pipes penetrate the jacket from the upper part of the other side of the tank body and extend... The cooling pipes located inside the tank do not interfere with the stirring shaft and blades, and the cooling pipes located outside the tank do not interfere with the steam inlet and outlet. This allows the device to heat or cool the tank through the heating jacket and cooling pipes, effectively adjusting the temperature according to the reaction progress. The adjustment speed is fast, effectively ensuring the stability of the final product quality. However, it still has some shortcomings in practical use. It cannot continuously produce benzohydroxyxamic acid, which reduces its efficiency and speed. Also, the internal stirring device cannot be disassembled during use, making it inconvenient to maintain or replace. Utility Model Content
[0004] The purpose of this invention is to provide a continuous flow production equipment for benzohydroxyxamic acid to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a continuous flow production equipment for benzohydroxyxamic acid, comprising a mixing reactor and an acidification reactor. An acidification reactor is mounted on a plane on one side of the mixing reactor, and a crystallizer is mounted on a plane on the other side of the acidification reactor. A hydrocyclone is mounted on one side of the bottom of the crystallizer, and a wastewater processor is mounted at the bottom of the hydrocyclone. A dryer is mounted on one side of the hydrocyclone. A cover plate is connected to the top of the mixing reactor via a flange, and a motor is mounted at the center of the top of the cover plate. The output end of the motor is connected to a bearing and a coupling. The apparatus extends into the mixing reactor and is equipped with a stirring shaft. Connecting blocks are evenly distributed on the stirring shaft, and each connecting block is equipped with a connecting cover. A stirring rod is located inside each connecting cover. An insertion block is located at the end of each stirring rod near the connecting block, and a slot is located within the corresponding connecting block. The insertion block is inserted into the connecting block through the slot. This allows benzohydroxyxamic acid to pass through the mixing reactor, acidification reactor, crystallizer, hydrocyclone, and dryer, improving production efficiency and reducing wasted time during material transfer. Furthermore, the stirring rod can be assembled and disassembled before use, facilitating maintenance and replacement.
[0006] Preferably, threaded holes are provided at the corresponding middle positions of the connecting block and the insert block, and screw rods are threadedly connected to the corresponding threaded holes of the connecting block and the insert block. Nuts are threadedly connected to both ends of the screw rods, so that the screw rods are screwed through the threaded holes of the connecting block and the insert block, and the nuts are screwed to both ends of them, so as to initially fix them.
[0007] Preferably, threaded holes are provided at the corresponding middle positions of the connecting cover and the stirring rod, and screw rods are threadedly connected to the corresponding threaded holes of the connecting cover and the stirring rod. Nuts are threadedly connected to both ends of the screw rods, so that the screw rods are screwed through the threaded holes of the connecting cover and the stirring rod, and the nuts are screwed to both ends, which can fix them a second time.
[0008] Preferably, a feed pipe is provided at the middle position on one side of the top of the cover plate, and the bottom of the feed pipe extends into the mixing reactor and is provided with a conical flow guide hood. The top of the flow guide hood is uniformly provided with radial flow guide grooves, and the four sides of the top edge of the flow guide hood are connected to the bottom of the feed pipe by connecting rods, so that the raw materials are guided through the flow guide hood when they enter, which can reduce the side reactions caused by excessive local concentration.
[0009] Preferably, the stirring rod is evenly provided with stirring support rods, and vertical scrapers are provided between the other ends of the stirring rods. The scrapers are all in close contact with the inner wall of the mixing reactor, and the outer side of the mixing reactor is evenly wrapped with heat insulation pipes. This allows the stirring rods to drive the stirring support rods to stir the materials horizontally and vertically, making the mixing more uniform. The scrapers scrape off the material from the inner wall, preventing the material from adhering for a long time. In winter, the heat insulation pipes can keep the mixing reactor warm, reducing heat loss.
[0010] Preferably, the top of the mixing reactor is equipped with a metering pump and a dynamic mixer, and the outlet ends of the dynamic mixer and the metering pump are both connected to the feed pipe, so that the raw materials are fed into the mixing reactor in proportion through the metering pump, and the alkaline solution is added synchronously with the raw materials through the dynamic mixer to control the pH value of the reaction system.
[0011] Preferably, the top of the acidification reactor is equipped with a static mixer, and the discharge end of the static mixer is connected to the acidification reactor. The acidification reactor, mixing reactor, crystallizer, hydrocyclone, dryer and wastewater processor are all connected by pipelines. The pipelines of the acidification reactor, mixing reactor, crystallizer, hydrocyclone, dryer and wastewater processor are all equipped with liquid delivery pumps and control valves, so that concentrated sulfuric acid is rapidly acidified through the static mixer. During continuous production, materials can be transferred between pipelines. During the transfer, liquid delivery pumps and control valves can be used in conjunction.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This continuous flow production equipment for benzohydroxyxamic acid, through the action of a mixing reactor, an acidification reactor, a crystallizer, a hydrocyclone, and a dryer, allows the materials to be mixed and then undergo an oximation reaction, followed by an acidification reaction with concentrated sulfuric acid, separation of the liquid, cooling and crystallization, filtration of the crystallization solution, and finally drying of the crystals, can produce benzohydroxyxamic acid. This can improve production efficiency and reduce the time wasted during material transfer. Before use, the insert block at one end of the stirring rod can be inserted into the slot of the connecting block, then the screw rod one can be screwed through the connecting block and the insert block, and the two ends of the screw rod one can be fixed with nuts. Then the screw rod two can be screwed through the connecting cover and the stirring rod, and the two ends of the screw rod two can be fixed with nuts. The stirring rod can be assembled and disassembled, facilitating its maintenance and replacement. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the main structure of the mixing reactor of this utility model;
[0015] Figure 3This is a schematic diagram of the main cross-sectional structure of the mixing reactor of this utility model;
[0016] Figure 4 This is a top view schematic diagram of the drainage hood structure of this utility model;
[0017] Figure 5 This is a top cross-sectional view of the mixing reactor of this utility model;
[0018] Figure 6 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle;
[0019] In the diagram: 1. Mixing reactor; 2. Acidification reactor; 3. Metering pump; 4. Dynamic mixer; 5. Static mixer; 6. Crystallizer; 7. Hydrocyclone; 8. Dryer; 9. Wastewater treatment unit; 10. Insulation pipe; 11. Cover plate; 12. Motor; 13. Feed pipe; 14. Drainage hood; 15. Scraper; 16. Connecting block; 17. Stirring shaft; 18. Stirring rod; 19. Drainage channel; 20. Connecting cover; 21. Insert block; 22. Screw one; 23. Screw two. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0021] Please see Figure 1-6 This utility model provides an embodiment of a continuous flow production equipment for benzohydroxyoxime acid, comprising a mixing reactor 1 and an acidification reactor 2. The acidification reactor 2 is provided on a plane on one side of the mixing reactor 1, and a crystallizer 6 is provided on a plane on the other side of the acidification reactor 2. A hydrocyclone 7 is provided on one side of the bottom of the crystallizer 6, and a wastewater processor 9 is provided at the bottom of the hydrocyclone 7. A dryer 8 is provided on one side of the hydrocyclone 7. A metering pump 3 and a dynamic mixer 4 are provided at the top of the mixing reactor 1, and the discharge ends of the dynamic mixer 4 and the metering pump 3 are both connected to the feed pipe 13. A static mixer 5 is provided at the top of the acidification reactor 2, and the discharge end of the static mixer 5 is connected to the acidification reactor 2. The acidification reactor 2, the mixing reactor 1, the crystallizer 6, the hydrocyclone 7, the dryer 8 and the wastewater processor 9 are all connected by pipes, and a liquid delivery pump and a control valve are provided on the pipes of the acidification reactor 2, the mixing reactor 1, the crystallizer 6, the hydrocyclone 7, the dryer 8 and the wastewater processor 9.
[0022] In use, the raw materials can be fed into the mixing reactor 1 through the metering pump 3 and the feed pipe 13. Then, the alkaline solution is fed into the mixing reactor 1 through the dynamic mixer 4 and the feed pipe 13, and the internal temperature is maintained at 25-42℃ for thorough mixing and oxime reaction. After the reaction is completed, it can be fed into the acidification reactor 2. Then, concentrated sulfuric acid is rapidly acidified through the static mixer 5 and fed into the acidification reactor 2 for continuous acidification reaction. By-product salts are removed by membrane separation technology. After separation, the temperature is cooled to the range of 20-25℃ and it can enter the crystallizer 6 for crystallization. After crystallization, solid-liquid separation can be performed through the hydrocyclone 7. During solid-liquid separation, the mother liquor is recycled and reused, and the wastewater is purified through the wastewater processor 9 to prevent environmental pollution. Then, the wet crystals can be transferred to the dryer 8 for continuous drying. The benzoyl hydroxyxamic acid product can be packaged, which can improve production efficiency and reduce the time wasted during material transfer.
[0023] The top of the mixing reactor 1 is connected to a cover plate 11 via a flange. A motor 12 is located at the center of the top of the cover plate 11. The output end of the motor 12 extends into the mixing reactor 1 via a bearing and a coupling, where a stirring shaft 17 is located. Connecting blocks 16 are evenly distributed on the stirring shaft 17, and each connecting block 16 is equipped with a connecting cover 20. A stirring rod 18 is located inside each connecting cover 20. An insertion block 21 is located at one end of each stirring rod 18 near the connecting block 16, and a slot is provided in the corresponding connecting block 16. The connecting block 16 is inserted into the slot. The connecting block 16 and the insert 21 are provided with threaded holes at their corresponding middle positions. The connecting block 16 and the insert 21 are connected to the threaded holes by the threaded rod 22. The two ends of the threaded rod 22 are connected to the nuts by the threaded rod. The connecting cover 20 and the stirring rod 18 are provided with threaded holes at their corresponding middle positions. The connecting cover 20 and the stirring rod 18 are connected to the threaded holes by the threaded rod 23. The two ends of the threaded rod 23 are connected to the nuts by the threaded rod.
[0024] In use, the insert 21 at one end of the stirring rod 18 can be inserted into the slot of the connecting block 16 through the connecting cover 20. Then, screw 22 is screwed through the connecting block 16 and the insert 21, and nuts are used to fix both ends of screw 22. Then, screw 23 is screwed through the connecting cover 20 and the stirring rod 18, and nuts are used to fix both ends of screw 23. This makes the connection of the stirring rod 18 more secure, and the stirring rod 18 can be assembled and disassembled for easy maintenance and replacement. Then, the cover plate 11 is connected to the mixing reactor 1 through the flange. When the material enters, the motor 12 can be started to drive the stirring rod 18 on the stirring shaft 17 to rotate, which can mix the internal material and accelerate its mixing reaction.
[0025] A feed pipe 13 is provided at the middle position of one side of the top of the cover plate 11, and the bottom of the feed pipe 13 extends into the mixing reactor 1 and is provided with a conical flow guide hood 14. The top of the flow guide hood 14 is evenly provided with radial flow guide grooves 19, and the top edge of the flow guide hood 14 is connected to the bottom of the feed pipe 13 by connecting rods.
[0026] When in use, the material can be fed into the mixing reactor 1 through the feed pipe 13 and then guided through the flow guide hood 14. The flow guide trough 19 at the top can guide the material accumulated on the top to fall down, which can prevent the material from falling directly to one place when it enters and reduce the side reactions caused by excessive local concentration.
[0027] Stirring rods 18 are evenly provided with stirring support rods, and vertical scrapers 15 are provided between the other ends of stirring rods 18. The scrapers 15 are all in contact with the inner wall of the mixing reactor 1, and the outer side of the mixing reactor 1 is evenly wrapped with heat insulation pipes 10.
[0028] When in use, the stirring rod 18 can rotate, causing the stirring support rod to rotate as well, allowing for simultaneous horizontal and vertical stirring, resulting in more uniform mixing. During stirring, the scraper 15 can also rotate to scrape the inner wall of the mixing reactor 1, preventing material adhesion and ensuring its effectiveness. When using the device in winter, the insulation pipe 10 can be filled with insulating gas to keep the mixing reactor 1 warm and prevent excessive heat loss.
[0029] In this embodiment, the insertion block 21 at one end of the stirring rod 18 is inserted into the slot of the connecting block 16 through the connecting cover 20. Then, the screw 22 is screwed through the connecting block 16 and the insertion block 21, and the two ends of the screw 22 are fixed with nuts. Next, the screw 23 is screwed through the connecting cover 20 and the stirring rod 18, and the two ends of the screw 23 are fixed with nuts. This makes the connection of the stirring rod 18 more secure, allowing for easy assembly and disassembly of the stirring rod 18 for maintenance and replacement. Once the device is ready, the raw materials can be fed through the metering pump 3 and the feed pipe. Feed 13 into the mixing reactor 1. Then, the alkaline solution is fed into the mixing reactor 1 through the dynamic mixer 4 and the feed pipe 13. During feeding, the material enters the mixing reactor 1 through the feed pipe 13 and is guided by the guide hood 14. The guide trough 19 at the top guides the material accumulated on top to fall down, preventing the material from falling directly to one place and reducing side reactions caused by excessively high local concentrations. During feeding, the internal temperature is maintained at 25-42℃ for thorough mixing and oxime reaction. The motor can be started simultaneously with mixing. 12 drives the stirring rod 18 on the stirring shaft 17 to rotate, causing the stirring rod 18 to rotate together with the stirring support rod, which can simultaneously stir in the horizontal and vertical directions, making the stirring more uniform. During stirring, the scraper 15 can also rotate to scrape the inner wall of the mixing reactor 1, which can prevent material from adhering and affecting its use. After the reaction is completed, it can be sent to the acidification reactor 2. Then, concentrated sulfuric acid is rapidly acidified through the static mixer 5 and sent to the acidification reactor 2 for continuous acidification reaction. By-product salts are removed by membrane separation technology. After separation, the temperature is cooled to 20°C. Within a temperature range of -25℃, crystallization can be carried out in crystallizer 6. After crystallization, solid-liquid separation can be performed through hydrocyclone 7. During solid-liquid separation, the mother liquor is recycled and reused, and the wastewater is purified through wastewater processor 9 to prevent environmental pollution. Then, the wet crystals can be transferred to dryer 8 for drying. The benzoyl hydroxyxamic acid product can be packaged, which can improve production efficiency and reduce the time wasted during material transfer. When used in winter, the insulation pipe 10 can be filled with insulation gas to keep the mixing reactor 1 warm and prevent excessive heat loss.
[0030] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.
[0031] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0032] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.
[0033] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A continuous flow production apparatus for benzohydroxyxamic acid, characterized in that: The reactor includes a mixing reactor (1) and an acidification reactor (2). The acidification reactor (2) is located on one side of the mixing reactor (1), and a crystallizer (6) is located on the other side of the acidification reactor (2). A hydrocyclone (7) is located on one side of the bottom of the crystallizer (6), and a wastewater processor (9) is located at the bottom of the hydrocyclone (7). A dryer (8) is located on one side of the hydrocyclone (7). A cover plate (11) is connected to the top of the mixing reactor (1) via a flange, and a motor (12) is located at the middle position of the top of the cover plate (11). The output end of the motor (12) extends through the bearing and coupling into the mixing reactor (1) and is provided with a stirring shaft (17). The stirring shaft (17) is provided with connecting blocks (16) evenly, and each connecting block (16) is provided with a connecting cover (20). Each connecting cover (20) is provided with a stirring rod (18). Each stirring rod (18) is provided with an insert (21) at one end near the connecting block (16). The connecting block (16) corresponding to the insert (21) is provided with a slot, and the insert (21) is inserted into the connecting block (16) through the slot.
2. The continuous flow production equipment for benzohydroxyxamic acid according to claim 1, characterized in that: The connecting block (16) and the insert block (21) are provided with threaded holes at their corresponding middle positions, and the connecting block (16) and the insert block (21) are connected to screw rods (22) by threads, and both ends of screw rods (22) are connected to nuts by threads.
3. The continuous flow production equipment for benzyl hydroxamic acid according to claim 1, characterized in that: The connecting cover (20) and the stirring rod (18) are provided with threaded holes at their corresponding middle positions, and the connecting cover (20) and the stirring rod (18) are connected to the screw rod (23) by threads, and the two ends of the screw rod (23) are connected to nuts by threads.
4. The continuous flow production equipment for benzohydroxyxamic acid according to claim 1, characterized in that: A feed pipe (13) is provided at the middle position on one side of the top of the cover plate (11), and the bottom of the feed pipe (13) extends into the mixing reactor (1) and is provided with a conical flow guide hood (14). The top of the flow guide hood (14) is uniformly provided with radial flow guide grooves (19), and the top edge of the flow guide hood (14) is connected to the bottom of the feed pipe (13) by connecting rods.
5. The continuous flow production equipment for benzohydroxyxamic acid according to claim 1, characterized in that: The stirring rod (18) is uniformly provided with stirring support rods, and vertical scrapers (15) are provided between the other ends of the stirring rod (18). The scrapers (15) are all in contact with the inner wall of the mixing reactor (1), and the outside of the mixing reactor (1) is uniformly wrapped with heat insulation pipes (10).
6. The continuous flow production equipment for benzyl hydroxamic acid according to claim 1, characterized in that: The mixing reactor (1) is equipped with a metering pump (3) and a dynamic mixer (4) at the top, and the discharge ends of the dynamic mixer (4) and the metering pump (3) are connected to the feed pipe (13).
7. The continuous flow production equipment for benzohydroxyxamic acid according to claim 1, characterized in that: The top of the acidification reactor (2) is equipped with a static mixer (5), and the discharge end of the static mixer (5) is connected to the acidification reactor (2). The acidification reactor (2), the mixing reactor (1), the crystallizer (6), the hydrocyclone (7), the dryer (8), and the wastewater processor (9) are all connected by pipes. The pipes of the acidification reactor (2), the mixing reactor (1), the crystallizer (6), the hydrocyclone (7), the dryer (8), and the wastewater processor (9) are all equipped with liquid delivery pumps and control valves.