2-ethyl anthraquinone closed-loop reaction device
By designing a closed-loop reaction device, a continuous cyclic reaction of 2-ethylanthraquinone was achieved, solving the problem of uneven material mixing, improving reaction efficiency and yield, and ensuring the stability of product quality.
Patent Information
- Application Number
- CN202423236857.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In existing production equipment, the materials for the 2-ethylanthraquinone ring-closure reaction are not mixed evenly, which affects the reaction process and yield, resulting in unstable product quality.
The closed-loop reaction device consists of a circulating tank, a feed buffer tank, a toluene condenser, a flash tank, and reactors arranged in a row. Combined with catalyst loading, washing, and vacuuming devices, it achieves continuous material circulation and full reaction.
Continuous cyclic reaction improves reaction efficiency and yield, ensuring the stability and consistency of product quality.
Smart Images
Figure CN223717082U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to 2-ethylanthraquinone preparation technical field especially relates to a 2-ethylanthraquinone closed loop reaction unit. BACKGROUND
[0002] 2-ethylanthraquinone is an important organic synthesis intermediate, has the extensive application in multiple fields, including manufacturing hydrogen peroxide, medicine, dye intermediate, photocuring resin catalyst, photodegradation membrane, coating and photosensitive polymerization initiator etc., under certain conditions, 2-ethylbenzoyl benzoic acid (2-ethylbenzoyl benzoic acid aluminum complex salt is generated by reacting anhydride, ethylbenzene under the action of aluminium trichloride, 2-ethylbenzoyl benzoic acid aluminum complex salt is obtained by acid hydrolysis 2-ethylbenzoyl benzoic acid) and toluene carry out closed loop reaction, generate 2-ethylanthraquinone.
[0003] In the existing production equipment, the reactants are all put into the mixing reactor for closed loop reaction, and in the mixing reactor, due to the influence of the physical properties of the reactants and the adding mode, the material mixing may be uneven, the uneven mixing will affect the progress of the reaction and the yield, and even may cause local side reaction, affecting the quality of the product. SUMMARY
[0004] The utility model discloses a 2-ethylanthraquinone closed loop reaction device, aims at realizing the continuous, stable circulation of material, improving reaction efficiency and yield.
[0005] In order to solve the above technical problem, the utility model adopts the technical scheme of a kind of 2-ethylanthraquinone closed loop reaction device, including circulating tank, feed buffer tank, toluene condenser, flash tank and several groups of linearly arranged reactor, the first feed port of circulating tank is connected by conveying pipe two of feed buffer tank, conveying pipe two is provided with feed heater, the discharge port of circulating tank is provided with conveying pipe five, conveying pipe five is provided with circulating heater, the bottom of each reactor is provided with material conveying pipe two connected with conveying pipe five, the second feed port of circulating tank is provided with conveying pipe three, the top of each reactor is provided with material conveying pipe one connected with conveying pipe three, the feed port of flash tank is provided with conveying pipe four, conveying pipe four is connected with conveying pipe five by conveying branch pipe two consistent with reactor group number, one side of flash tank is provided with reflux tower, the discharge port of reflux tower is connected with toluene condenser by pipeline.
[0006] Preferably, the upper portion of the reactor is provided with a single-beam suspension crane, and the single-beam suspension crane is provided with a catalyst loading barrel.
[0007] Preferably, the utility model further comprises a reactor washing device connected with the reactor.
[0008] Preferably, the reactor washing device comprises a toluene washing tank, a feeding port of the toluene washing tank is provided with a conveying pipe one, the conveying pipe one is connected with a conveying branch pipe one, a discharging port of the toluene washing tank is provided with a conveying pipe six, the conveying pipe six is provided with a washing toluene heater, and a conveying pipe two is connected with a conveying branch pipe four.
[0009] Preferably, the reactor is connected with a vacuumizing device.
[0010] Preferably, the vacuumizing device comprises a vacuum buffer tank, a vacuum pump and a tail gas cooler which are connected in sequence through pipelines, a feeding port of the vacuum buffer tank is provided with a vacuumizing main pipe, and the vacuumizing main pipe is connected with corresponding reactors through a plurality of groups of conveying branch pipes three.
[0011] Preferably, the reactor is connected with a nitrogen supply device, and the nitrogen supply device is connected with the vacuumizing main pipe through a gas flow conveying pipe.
[0012] After the above technical scheme is adopted, the beneficial effects of the present application are as follows:
[0013] The BE acid-toluene solution in the circulating tank is heated and then continuously sent into the reactor through the conveying pipe five, and the material after reaction is returned into the circulating tank through the conveying pipe three, and then is sent into the reactor again, and after a certain number of cycles, the 2-ethylanthraquinone product meeting the quality requirements can be obtained from the circulating tank. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0015] Figure 1 It is a structural schematic view of the closed loop reaction device.
[0016] Explanation of reference signs: 1, feed buffer tank, 2, toluene washing tank, 3, conveying pipe one, 4, washing toluene heater, 5, feed heater, 6, conveying pipe two, 7, conveying branch pipe one, 8, catalyst loading barrel, 9, single-beam suspension crane, 10, material conveying pipe one, 11, conveying pipe three, 12, nitrogen supply device, 13, gas flow conveying pipe, 14, conveying pipe four, 15, vacuum main pipe, 16, toluene condenser, 17, vacuum cooler, 18, tail gas cooler, 19, vacuum pump, 20, vacuum buffer tank, 21, reflux column, 22, flash tank, 23, circulation tank, 24, circulation heater, 25, conveying pipe five, 26, material conveying pipe two, 27, conveying branch pipe two, 28, reactor, 29, conveying branch pipe three, 30, conveying branch pipe four, 31, conveying pipe six. DETAILED DESCRIPTION
[0017] The features and exemplary embodiments of each aspect of the present application will be described in detail below, in order to make the purpose, technical scheme and advantages of the present application more clear and apparent, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are configured only to explain the present application and are not configured to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.
[0018] The orientation words appearing in the following description are the directions shown in the drawings, and are not limited to the specific structure of the present application. In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected or integrally connected; it can be directly connected, or it can be indirectly connected. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0019] As Figure 1 shown, the embodiment of the present application provides a 2-ethylanthraquinone closed loop reaction device, which comprises a circulation tank 23, a feed buffer tank 1, a nitrogen supply device 12, a toluene condenser 16, a flash tank 22 and a plurality of groups of linearly arranged reactors 28.
[0020] The feed buffer tank 1 is connected with the first feed inlet of the circulating tank 23 through the conveying pipe two 6, the second feed inlet of the circulating tank 23 is connected with the conveying pipe three 11, and the discharge outlet of the circulating tank 23 is connected with the conveying pipe five 25. The bottom of each reactor 28 is provided with a material conveying pipe two 26 connected with the conveying pipe five 25 (control valves are arranged at the connection positions of different pipes to flexibly adjust and control the flow, pressure and direction of the material, which is a common arrangement in the art, so the description is omitted), and the top of each reactor 28 is provided with a material conveying pipe one 10 connected with the conveying pipe three 11. The feed inlet of the flash tank 22 is provided with the conveying pipe four 14, the conveying pipe four 14 is connected with the conveying pipe five 25 through the conveying branch pipe two 27 which has the same number of groups as the reactors 28. The flash tank 22 is provided with a reflux column 21 on one side, and the discharge outlet of the reflux column 21 is connected with the toluene condenser 16 through a pipe. When the catalyst needs to be added to the reactor 28, the single-beam suspension crane 9 arranged above the reactor 28 is used to add the catalyst in the catalyst loading barrel 8 to the reactor 28.
[0021] Toluene is sent into the feed buffer tank 1, and feeding is stopped when the cumulative flow of toluene reaches a certain tonnage. After the BE acid is weighed and measured, it is sent into the feed buffer tank 1 and stirred uniformly to prepare a BE acid-toluene solution (hereinafter referred to as reaction liquid). The reaction liquid in the feed buffer tank 1 is heated along the conveying pipe two 6 and through the feed heater 5 thereon, and then is punched into the circulating tank 23. When the liquid level of the circulating tank 23 reaches 50%, the reaction liquid is heated along the conveying pipe five 25 and through the circulating heater 24 thereon, and then is punched into each reactor 28 to perform a circulating closed-loop reaction (the reaction liquid in the circulating tank 23 is sent into the reactor 28, and then the reaction liquid returns to the circulating tank 23 through the conveying pipe three 11, is heated again, and then is sent into the reactor 28).
[0022] When the conversion rate of the BE acid at the inlet of the reactor 28 reaches a preset value, the reaction product is sent into the flash tank 22 along the conveying pipe four 14. The gas phase (toluene) evaporated from the top of the reflux column 21 is condensed into a liquid phase by the toluene condenser 16 and is stored in a toluene receiving tank (not shown in the figure), and the liquid phase at the bottom of the flash tank 22 (2-ethylanthraquinone crude product) is stored in a 2-ethylanthraquinone receiving tank (not shown in the figure) through a pipe.
[0023] The 2-ethylanthraquinone closed-loop reaction device further comprises a vacuum extraction device connected with the reactors 28, and the vacuum extraction device comprises a vacuum buffer tank 20, a vacuum pump 19 and an exhaust gas cooler 18 connected in sequence through pipes. The feed inlet of the vacuum buffer tank 20 is provided with a vacuum extraction main pipe 15, a nitrogen gas supply device 12 is connected with the vacuum extraction main pipe 15 through an air flow conveying pipe 13, and the vacuum extraction main pipe 15 is connected with corresponding reactors 28 through multiple groups of conveying branch pipes three 29.
[0024] After the end of the cycle, the reactor 28 is opened at the catalyst loading port, the catalyst unloading port and the bottom cleaning port, and the deactivated catalyst is unloaded by vacuum discharge. The deactivated catalyst remaining at the bottom is swept out through the cleaning port and is spread onto the wire mesh and part of the active catalyst. The catalyst unloading port and the cleaning port are closed, the catalyst is loaded into the reactor 28 through the catalyst loading port using the catalyst loading barrel 8, and the catalyst loading is completed. The catalyst loading port is closed, the pressure is tested using nitrogen, and the reactor is ready for use after no leakage is found. The next cycle is performed.
[0025] The 2-ethylanthraquinone cycle reaction device further comprises a reactor washing device, which comprises a toluene washing tank 2. The toluene washing tank 2 is connected with a conveying pipe one 3, and the conveying pipe one 3 is connected with a material conveying pipe one 10 through a conveying branch pipe one 7 consistent with the number of the reactors 28. The toluene washing tank 2 is connected with a conveying pipe six 31, and the conveying pipe six 31 is connected with a material conveying pipe two 26 through a conveying branch pipe four 30 consistent with the number of the reactors 28. The conveying pipe six 31 is provided with a washing toluene heater 4.
[0026] After the end of the cycle, the reactor 28 is opened at the catalyst loading port, the catalyst unloading port and the bottom cleaning port, and the deactivated catalyst is unloaded by vacuum discharge. The deactivated catalyst remaining at the bottom is swept out through the cleaning port and is spread onto the wire mesh and part of the active catalyst. The catalyst unloading port and the cleaning port are closed, the catalyst is loaded into the reactor 28 through the catalyst loading port using the catalyst loading barrel 8, and the catalyst loading is completed. The catalyst loading port is closed, the pressure is tested using nitrogen, and the reactor is ready for use after no leakage is found. The next cycle is performed.
[0027] In accordance with the embodiments of the present application as described above, the embodiments do not describe all the details and do not limit the present application to the specific embodiments. Obviously, many modifications and variations can be made based on the above description. The embodiments are selected and described in detail in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well utilize the present application and make modifications based on the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A 2-ethylanthraquinone ring-closing reaction apparatus, characterized in that: The reactor includes a circulating tank (23), a feed buffer tank (1), a toluene condenser (16), a flash tank (22), and several reactors (28) arranged in a row. The feed buffer tank (1) is connected to the first inlet of the circulating tank (23) via a second conveying pipe (6). A feed heater (5) is installed on the second conveying pipe (6). A fifth conveying pipe (25) is installed at the outlet of the circulating tank (23). A circulating heater (24) is installed on the fifth conveying pipe (25). A material conveying pipe connected to the fifth conveying pipe (25) is installed at the bottom of each reactor (28). Second (26), the second feed inlet of the circulating tank (23) is provided with a conveying pipe three (11), and the top of each reactor (28) is provided with a material conveying pipe one (10) connected to the conveying pipe three (11). The feed inlet of the flash tank (22) is provided with a conveying pipe four (14). The conveying pipe four (14) is connected to the conveying pipe five (25) through the conveying branch pipe two (27) which is the same as the number of reactors (28). A reflux tower (21) is provided on one side of the flash tank (22). The outlet of the reflux tower (21) is connected to the toluene condenser (16) through a pipe.
2. The 2-ethylanthraquinone closed-ring reaction apparatus according to claim 1, characterized in that: A single-beam suspended crane (9) is mounted above the reactor (28), and a catalyst loading tank (8) is mounted on the single-beam suspended crane (9).
3. The 2-ethylanthraquinone ring-closing reaction apparatus according to claim 1, characterized in that: It also includes a reactor washing device connected to the reactor (28).
4. The 2-ethylanthraquinone ring-closing reaction apparatus according to claim 3, characterized in that: The reactor washing device includes a toluene washing tank (2), the inlet of the toluene washing tank (2) is provided with a conveying pipe 1 (3), the material conveying pipe 1 (10) is connected to the conveying pipe 1 (3) through the conveying branch pipe 1 (7), the outlet of the toluene washing tank (2) is provided with a conveying pipe 6 (31), the conveying pipe 6 (31) is provided with a washing toluene heater (4), and the material conveying pipe 2 (26) is connected to the material conveying pipe 2 (26) through the conveying branch pipe 4 (30).
5. The 2-ethylanthraquinone ring-closing reaction apparatus according to claim 1, characterized in that: It also includes a vacuum device for connecting the reactor (28).
6. The 2-ethylanthraquinone ring-closing reaction apparatus according to claim 5, characterized in that: The vacuum device includes a vacuum buffer tank (20), a vacuum pump (19) and an exhaust gas cooler (18) connected in sequence by pipes. The vacuum buffer tank (20) is equipped with a vacuum main pipe (15) at its inlet. The vacuum main pipe (15) is connected to the corresponding reactor (28) through multiple sets of conveying branch pipes (29).
7. The 2-ethylanthraquinone ring-closing reaction apparatus according to claim 6, characterized in that: It also includes a nitrogen supply device (12), which is connected to the vacuum main pipe (15) via a gas delivery pipe (13).