Isatoic anhydride compound preparation device
Through the precise addition system of components such as metering cylinders, bellows and solenoid valves, combined with stirring and heating components, the problem of inaccurate addition of concentrated sulfuric acid is solved, and the efficient preparation of isatin anhydride compounds is achieved, and the stirring uniformity and purity are improved.
Patent Information
- Application Number
- CN202510316800.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2025-07-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The traditional method of adding concentrated sulfuric acid leads to the oxidation reaction to produce by-products, causing waste and difficult to accurately control, affecting the preparation efficiency of isatin anhydride compounds.
The addition system is adopted with a combination of metering cylinder, corrugated pipe, solenoid valve and cylinder, combined with stirring parts and heating parts to achieve accurate addition and uniform stirring of concentrated sulfuric acid, reduce oxidation reactions, and improve catalytic effect.
The precise addition of concentrated sulfuric acid is achieved, avoiding waste, improving stirring uniformity and reaction efficiency, and ensuring the purity of the compound.
Smart Images
Figure CN120285920A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of the preparation of isatoic anhydride compounds, and more specifically, to an apparatus for the preparation of isatoic anhydride compounds. Background Art
[0002] As a heterocyclic compound with rich functions, isatoic anhydride compounds have been known for nearly a century. Its name often involves various naming methods. Isatoic anhydride is an important chemical intermediate, and its homologues and derivatives are widely used in the synthesis of fine chemical products such as pharmaceuticals, dyes, pigments, fragrances, flame retardants, and preservatives.
[0003] In the preparation process of isatoic anhydride compounds, concentrated sulfuric acid needs to be added dropwise as a catalyst. However, due to its strong oxidizing and corrosive properties, concentrated sulfuric acid is a relatively dangerous and easily deteriorated material. In the traditional way of adding concentrated sulfuric acid, generally, concentrated sulfuric acid is directly put in from the addition port of the tank body. In this way, during the falling process, concentrated sulfuric acid will react with air, undergo oxidation, and produce some by-products, which will not only cause waste of concentrated sulfuric acid, but also require subsequent treatment of the by-products.
[0004] To solve the above problems, this application provides an apparatus for the preparation of isatoic anhydride compounds. Summary of the Invention
[0005] The apparatus for the preparation of isatoic anhydride compounds provided by this application adopts the following technical solutions:
[0006] An apparatus for the preparation of isatoic anhydride compounds, including a tank body, an auxiliary mechanism is arranged inside the tank body, the auxiliary mechanism extends to the outside of the tank body, and the auxiliary mechanism includes a driving component, a stirring component, and a heating component;
[0007] The auxiliary component includes a metering cylinder, the metering cylinder is fixedly connected to the top of the tank body, a first connecting pipe and a second connecting pipe are fixedly connected to the top of the metering cylinder, a sulfuric acid pump is installed at the bottom end of the first connecting pipe, a pipeline is installed at the bottom of the sulfuric acid pump, the bottom end of the second connecting pipe is fixedly connected to a corrugated pipe, the corrugated pipe penetrates through the top of the tank body and extends into the tank body, a solenoid valve is installed on the outside of the corrugated pipe, a connecting plate is fixedly sleeved on the outside of the corrugated pipe, the connecting plate is located above the solenoid valve, a cylinder is fixedly connected between the connecting plate and the inner wall of the top of the tank body, a spring is fixedly connected to the inner wall of the bottom of the metering cylinder, a corrosion-resistant piston is fixedly connected to the top end of the spring, and a connecting component is arranged on the outside of the corrosion-resistant piston.
[0008] Further, the connecting component includes a feed hopper which is fixedly embedded in the top of the tank body. The bottom of the tank body is fixedly connected with a discharge pipe and a plurality of support legs. A valve is installed on the outer side of the discharge pipe. The plurality of support legs are evenly distributed, and universal wheels are installed at the bottom ends of the plurality of support legs.
[0009] Through the above technical solution, the discharge can be controlled by the valve. At the same time, by setting a plurality of universal wheels, the applicability of the device during later use can be improved.
[0010] Further, the driving component includes a motor which is fixedly connected to the top of the tank body. The output shaft of the motor is fixedly connected with a roller shaft, and the bottom end of the roller shaft extends into the tank body and is fixedly connected with a first gear.
[0011] Through the above technical solution, by setting the first gear, it is convenient to drive the first toothed ring to rotate later.
[0012] Further, a first toothed ring is meshed with one side of the first gear. The top of the first toothed ring is fixedly connected with a hollow ring, and the top of the hollow ring extends to the inner side of the top of the tank body.
[0013] Further, the connections between the hollow ring and the roller shaft and the tank body are both movably connected through bearings. A protective cover is sleeved outside the motor. The protective cover is made of a plate-frame filter material and is fixedly connected with the top of the tank body.
[0014] Through the above technical solution, since the protective cover is made of a plate-frame filter material, it can not only protect the motor but also ensure the ventilation effect of the motor during use, with the purpose of prolonging the service life of the motor.
[0015] Further, the stirring component includes two stirring shafts. The top ends of the two stirring shafts are embedded in the inner side of the bottom of the hollow ring. The two stirring shafts are symmetrically arranged with the midline of the hollow ring as the axis. Gear two is fixedly sleeved on the outer sides of the two stirring shafts.
[0016] Through the above technical solution, by setting two stirring shafts, the stirring effect can be improved, and further the stirring effect can be made more uniform.
[0017] Further, a second toothed ring is meshed with the outer sides of the two gear twos. The second toothed ring is rotatably connected with the inner wall of the tank body. The connections between the two stirring shafts and the hollow ring are both movably connected through bearings.
[0018] Through the above technical solution, through the mutual cooperation between the two gear twos and the second toothed ring, the two stirring shafts can rotate around their own axes while making a revolution.
[0019] Further, the heating component includes a spiral groove which is formed on the outer wall of the tank body. A spiral heating pipe is embedded inside the spiral groove, and the spiral heating pipe matches the spiral groove.
[0020] Through the above technical solution, by providing the spiral groove, the contact area between the spiral heating pipe and the tank body can be increased, thereby making the heating efficiency more efficient.
[0021] Further, a central processor and a temperature monitor are installed on the inner wall of the top of the tank body. Both the central processor and the temperature monitor are located between the hollow ring and the tank body. The temperature monitor is electrically connected to the input end of the central processor, and the central processor is electrically connected to the input end of the spiral heating pipe.
[0022] Through the above technical solution, by providing the temperature monitor, the purpose of continuously monitoring the temperature inside the tank body can be achieved, making the device more intelligent.
[0023] In summary, the present application includes the following beneficial technical effects:
[0024] In this invention, through the mutual cooperation among the air cylinder, the connecting plate, the corrugated pipe and the solenoid valve, the situation where concentrated sulfuric acid contacts with air during addition can be effectively avoided, thus preventing the waste of concentrated sulfuric acid. In addition, by providing the metering cylinder, more accurate addition can be realized, ensuring the catalytic effect on the basis of not wasting concentrated sulfuric acid;
[0025] In this invention, through the mutual cooperation between the driving component and the stirring component, the two stirring shafts can rotate around their own axes while revolving around a central axis. With the above structure, the stirring operation can be completed from multiple angles, resulting in better stirring uniformity and fully exerting the reaction effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is the overall structural schematic diagram of the present application;
[0027] Figure 2 is the perspective view of the upward cross-section of the present application;
[0028] Figure 3 is the perspective view of the front cross-section of the present application;
[0029] Figure 4 is the partial perspective view of the present application;
[0030] Figure 5 is of the present application Figure 2 enlarged view of the structure at A therein.
[0031] Explanation of the reference numerals in the drawings:
[0032] 1. Tank body; 2. Measuring cylinder; 3. First connecting pipe; 4. Second connecting pipe; 5. Sulfuric acid pump; 6. Pipeline; 7. Bellows; 8. Solenoid valve; 9. Connecting plate; 10. Cylinder; 11. Spring; 12. Acid-resistant piston; 13. Feed hopper; 14. Discharge pipe; 15. Support leg; 16. Valve; 17. Universal wheel; 18. Motor; 19. Roller; 20. First gear; 21. First gear ring; 22. Hollow ring; 23. Stirring shaft; 24. Second gear; 25. Second gear ring; 26. Spiral heating pipe; 27. Central processing unit; 28. Temperature monitor. Detailed implementation manners
[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.
[0034] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application 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 application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0035] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.
[0036] Embodiment:
[0037] The embodiment of the present application discloses a preparation device for isatoic anhydride compounds. Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , including a tank body 1. An auxiliary mechanism is provided inside the tank body 1, and the auxiliary mechanism extends to the outside of the tank body 1. The auxiliary mechanism includes a driving component, a stirring component, and a heating component;
[0038] The auxiliary components include a metering cylinder 2, which is fixedly connected to the top of the tank body 1. A first connecting pipe 3 and a second connecting pipe 4 are fixedly connected to the top of the metering cylinder 2. A sulfuric acid pump 5 is installed at the bottom end of the first connecting pipe 3, and a pipeline 6 is installed at the bottom of the sulfuric acid pump 5. The bottom end of the second connecting pipe 4 is fixedly connected to a corrugated pipe 7. The bottom end of the corrugated pipe 7 penetrates through the top of the tank body 1 and extends into the tank body 1. An electromagnetic valve 8 is installed on the outer side of the corrugated pipe 7. A connecting plate 9 is fixedly sleeved on the outer side of the corrugated pipe 7. The connecting plate 9 is located above the electromagnetic valve 8. A cylinder 10 is fixedly connected between the connecting plate 9 and the inner top wall of the tank body 1. A spring 11 is fixedly connected to the bottom inner wall of the metering cylinder 2, and an acid-resistant piston 12 is fixedly connected to the top end of the spring 11;
[0039] Please refer to Figure 1 , a connecting component is provided on the outer side of the acid-resistant piston 12. The connecting component includes a feed hopper 13, which is fixedly embedded in the top of the tank body 1. A discharge pipe 14 and a plurality of support legs 15 are fixedly connected to the bottom of the tank body 1. A valve 16 is installed on the outer side of the discharge pipe 14. The plurality of support legs 15 are evenly distributed. Universal wheels 17 are installed at the bottom ends of the plurality of support legs 15. The discharge can be controlled through the valve 16. At the same time, by setting a plurality of universal wheels 17, the applicability of the device in later use can be improved;
[0040] Please refer to Figure 3 and Figure 4 , the driving component includes a motor 18, which is fixedly connected to the top of the tank body 1. A roller 19 is fixedly connected to the output shaft of the motor 18. The bottom end of the roller 19 extends into the tank body 1 and is fixedly connected to a first gear 20. A first gear ring 21 is meshed with one side of the first gear 20. A hollow ring 22 is fixedly connected to the top of the first gear ring 21. The top of the hollow ring 22 extends to the inner side of the top of the tank body 1. By setting the first gear 20, it is convenient to drive the first gear ring 21 to rotate later;
[0041] Please refer to Figure 2 and Figure 3 , both the connections of the hollow ring 22 and the roller 19 with the tank body 1 are movably connected through bearings. A protective cover is sleeved outside the motor 18. The protective cover is made of a plate-frame filter material and is fixedly connected to the top of the tank body 1. Since the protective cover is made of a plate-frame filter material, it can not only protect the motor 18 but also ensure the ventilation effect of the motor 18 during use, with the purpose of extending the service life of the motor 18;
[0042] Please refer to Figure 2 and Figure 4, the stirring member includes two stirring shafts 23. The tops of the two stirring shafts 23 are embedded in the inner side of the bottom of the hollow ring 22. The two stirring shafts 23 are symmetrically arranged with the midline of the hollow ring 22 as the axis. Fixed sleeves of the two stirring shafts 23 on the outside are provided with second gears 24. Engaging with the outside of the two second gears 24 is a second toothed ring 25. The second toothed ring 25 is rotatably connected to the inner wall of the tank body 1. The joints of the two stirring shafts 23 and the hollow ring 22 are all movably connected through bearings. By providing the two stirring shafts 23, the purpose of improving the stirring effect can be achieved, and thus the stirring effect can be made more uniform. At the same time, through the mutual cooperation between the two second gears 24 and the second toothed ring 25, the two stirring shafts 23 can rotate around the center while also being able to rotate on their own axes;
[0043] Please refer to Figure 1 and Figure 3 , the heating member includes a spiral groove. The spiral groove is opened on the outer wall of the tank body 1. Inside the spiral groove is embedded a spiral heating tube 26. The spiral heating tube 26 matches the spiral groove. Mounted on the top inner wall of the tank body 1 are a central processor 27 and a temperature monitor 28. Both the central processor 27 and the temperature monitor 28 are located between the hollow ring 22 and the tank body 1. The temperature monitor 28 is electrically connected to the input end of the central processor 27. The central processor 27 is electrically connected to the input end of the spiral heating tube 26. By opening the spiral groove, the contact area between the threaded heating tube and the tank body 1 can be increased, and thus the heating efficiency can be made more efficient. At the same time, by providing the temperature monitor 28, the purpose of continuously monitoring the temperature inside the tank body 1 can be achieved, making the device more intelligent.
[0044] The implementation principle of this embodiment is as follows: In specific use, when concentrated sulfuric acid needs to be added, the cylinder 10 can be started first, so that the telescopic end of the cylinder 10 extends by stretching. Then, the bottom end of the bellows 7 is driven to move downward through the connecting plate 9 until the bottom end of the bellows 7 completely enters the reaction liquid. At this time, the height of the bottom end face of the bellows 7 is only slightly lower than the liquid level of the reaction liquid, so as to avoid excessive liquid pressure causing the spring 11 to not be able to fully retract. Then, according to the amount of concentrated sulfuric acid to be added, the sulfuric acid pump 5 is started, and concentrated sulfuric acid is injected into the measuring cylinder 2 through the pipeline 6 and the first connecting pipe 3. At the same time, the injection amount of concentrated sulfuric acid is judged according to the position of the acid-resistant piston 12. When the appropriate amount is reached, the sulfuric acid pump 5 can be closed. Then, the electromagnetic valve 8 on the bellows 7 is opened. At this time, the spring 11 will not be stressed. Under the action of the restoring force, the acid-resistant piston 12 will move upward and squeeze the concentrated sulfuric acid, so that it completely enters the reaction liquid. Compared with the prior art, the situation of concentrated sulfuric acid coming into contact with air during the addition of concentrated sulfuric acid can be effectively avoided, and the waste of concentrated sulfuric acid can be avoided. Due to the scale bar provided on the outside of the measuring cylinder 2, more accurate addition can be made. On the basis of not wasting concentrated sulfuric acid, the catalytic effect is also ensured. And because the cylinder 10 is provided, it can also be applicable to reaction liquids with different liquid levels;
[0045] At the same time, start the motor 18. The output shaft of the motor 18 drives the roller 19 to rotate. While the roller 19 rotates, it drives the first gear 20 to rotate. Since the first gear 20 meshes with the first gear ring 21, the hollow ring 22 can drive the two stirring shafts 23 to revolve around the center of the tank body 1. At this time, the two second gears 24 will mesh with the second gear ring 25, enabling the two stirring shafts 23 to rotate on their own axes while revolving. With the above structure, the stirring operation can be completed from multiple angles, resulting in better stirring uniformity and fully exerting the reaction effect;
[0046] During this period, the temperature monitor 28 can continuously monitor the temperature inside the tank body 1. When the temperature is lower than the specified temperature range, the temperature monitor 28 will send a signal to the central processor 27, and then the central processor 27 will send a signal to the spiral heating tube 26, causing the spiral heating tube 26 to heat up and heat the temperature inside the tank body 1. With the above structure, the temperature inside the tank body 1 can be kept within a certain range all the time, and finally a purer compound can be obtained.
[0047] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.
Claims
1. Preparation device for isatoic anhydride compounds, comprising a tank body (1), characterized in that: An auxiliary mechanism is provided inside the tank body (1), and the auxiliary mechanism extends to the outside of the tank body (1). The auxiliary mechanism includes a driving component, a stirring component, and a heating component. The auxiliary component includes a metering cylinder (2). The metering cylinder (2) is fixedly connected to the top of the tank body (1). A first connecting pipe (3) and a second connecting pipe (4) are fixedly connected to the top of the metering cylinder (2). A sulfuric acid pump (5) is installed at the bottom end of the first connecting pipe (3). A pipeline (6) is installed at the bottom of the sulfuric acid pump (5). The bottom end of the second connecting pipe (4) is fixedly connected to a corrugated pipe (7). The bottom end of the corrugated pipe (7) penetrates through the top of the tank body (1) and extends into the tank body (1). An electromagnetic valve (8) is installed on the outer side of the corrugated pipe (7). A connecting plate (9) is fixedly sleeved on the outer side of the corrugated pipe (7). The connecting plate (9) is located above the electromagnetic valve (8). A cylinder (10) is fixedly connected between the connecting plate (9) and the inner wall of the top of the tank body (1). A spring (11) is fixedly connected to the bottom inner wall of the metering cylinder (2). The top end of the spring (11) is fixedly connected to an acid-resistant piston (12). A connecting component is provided on the outer side of the acid-resistant piston (12).
2. The preparation apparatus for isatoic anhydride compounds according to claim 1, characterized in that: The connecting component includes a feed hopper (13). The feed hopper (13) is fixedly embedded in the top of the tank body (1). A discharge pipe (14) and a plurality of support legs (15) are fixedly connected to the bottom of the tank body (1). A valve (16) is installed on the outer side of the discharge pipe (14). The plurality of support legs (15) are evenly distributed. Universal wheels (17) are installed at the bottom ends of the plurality of support legs (15).
3. The preparation device of the isatoic anhydride compound according to claim 1, characterized in that: The driving component includes a motor (18). The motor (18) is fixedly connected to the top of the tank body (1). A roller shaft (19) is fixedly connected to the output shaft of the motor (18). The bottom end of the roller shaft (19) extends into the tank body (1) and is fixedly connected to a first gear (20).
4. The preparation device for isatoic anhydride compounds according to claim 3, characterized in that: A first toothed ring (21) is meshed with one side of the first gear (20). The top of the first toothed ring (21) is fixedly connected to a hollow ring (22). The top of the hollow ring (22) extends to the inner side of the top of the tank body (1).
5. The preparation device for isatoic anhydride compounds according to claim 4, characterized in that: Both the hollow ring (22) and the roller shaft (19) are movably connected to the tank body (1) through bearings. A protective cover is sleeved outside the motor (18). The protective cover is made of a plate-frame filter material. The protective cover is fixedly connected to the top of the tank body (1).
6. The preparation device for isatoic anhydride compounds according to claim 1, wherein: The stirring component includes two stirring shafts (23). The top ends of the two stirring shafts (23) are embedded in the inner side of the bottom of the hollow ring (22). The two stirring shafts (23) are symmetrically arranged with the center line of the hollow ring (22) as the axis. Second gears (24) are fixedly sleeved on the outer sides of the two stirring shafts (23).
7. The preparation device for isatoic anhydride compounds according to claim 6, characterized in that: A second toothed ring (25) is meshed with the outer sides of the two second gears (24). The second toothed ring (25) is rotatably connected to the inner wall of the tank body (1). Both the two stirring shafts (23) and the hollow ring (22) are movably connected through bearings.
8. The preparation device for isatoic anhydride compounds according to claim 1, wherein: The heating component includes a spiral groove, the spiral groove is opened on the outer wall of the tank body (1), a spiral heating pipe (26) is embedded in the spiral groove, and the spiral heating pipe (26) matches the spiral groove.
9. The preparation device for isatoic anhydride compounds according to claim 1, characterized in that: A central processor (27) and a temperature monitor (28) are installed on the inner top wall of the tank body (1). Both the central processor (27) and the temperature monitor (28) are located between the hollow ring (22) and the tank body (1). The temperature monitor (28) is electrically connected to the input end of the central processor (27), and the central processor (27) is electrically connected to the input end of the spiral heating pipe (26).