Anthraquinone oxidation apparatus and alkylanthraquinone production system

Abstract

The utility model relates to the technical field of alkylanthraquinone preparation, specifically relates to anthra oxidation reaction unit and alkylanthraquinone production system, wherein, first feeding mechanism and second feeding mechanism are connected in the top of reaction kettle respectively and two are communicated with containing cavity respectively, heating pipe is arranged in containing cavity and can with heat supply device circulation intercommunication, exhaust mechanism is connected in the top of reaction kettle and is communicated with containing cavity, and exhaust mechanism is used for discharging the gas in containing cavity, gas distributor is arranged in containing cavity and is located above reaction raw material prearranged material level, and gas distributor is arranged as the cylinder and is surrounded reaction kettle's axis distribution, and gas distributor is communicated with nitrogen generator, and nitrogen generator can transport nitrogen to containing cavity through gas distributor. By adopting the anthra oxidation reaction unit of the utility model, the concentration of oxygen can be reduced, thereby reducing the risk of combustion and explosion.

Description

Technical Field

[0001] This utility model relates to the field of alkylanthraquinone preparation technology, specifically to anthracene oxidation reaction apparatus and alkylanthraquinone production system. Background Technology

[0002] Alkylanthraquinones are important chemical materials. The preparation of alkylanthraquinones using hydrogen peroxide and alkylanthracene solution as raw materials is a newly emerging process with environmentally friendly characteristics. In this process, hydrogen peroxide generates reactive oxygen species, which oxidize the alkylanthracene to form alkylanthraquinones.

[0003] However, in this preparation process, hydrogen peroxide and alkyl anthracene solution react in a high-temperature environment (generally between 60℃ and 140℃). On the one hand, hydrogen peroxide may decompose during the reaction, producing oxygen; on the other hand, the reactive oxygen produced by hydrogen peroxide may undergo a quenching reaction, producing oxygen. Therefore, this preparation process generates a large amount of oxygen, resulting in a high oxygen concentration in the reaction apparatus, which poses a risk of combustion and explosion. Utility Model Content

[0004] The purpose of this invention is to solve the problem of high risk of combustion and explosion during the reaction of hydrogen peroxide and alkyl anthracene solution.

[0005] To achieve the above objectives, this utility model provides an anthracene oxidation reaction apparatus, which includes a reaction vessel, an exhaust mechanism, a first feeding mechanism, a second feeding mechanism, a heating pipe, a gas distributor, and a nitrogen generator. The reaction vessel has an internal containment cavity. The first and second feeding mechanisms are respectively connected to the top of the reaction vessel and communicate with the containment cavity. The first feeding mechanism is configured to allow alkyl anthracene particles and organic solvents to enter the containment cavity, and to allow hydrogen peroxide to be added dropwise into the containment cavity. The heating pipe is located in the containment cavity and is circulated with a heating device, used to heat the reaction materials in the containment cavity. The exhaust mechanism is connected to the top of the reaction vessel and communicates with the containment cavity, used to exhaust gas from the containment cavity. The gas distributor is located in the containment cavity and above a preset level of the reaction materials. The gas distributor is cylindrical and distributed around the axis of the reaction vessel. The gas distributor is communicated with the nitrogen generator, which can supply nitrogen gas into the containment cavity through the gas distributor.

[0006] In some embodiments, the outer peripheral surface of the gas distributor is completely attached to the inner wall of the reactor, and the inner side of the gas distributor is provided with a plurality of gas distribution holes for conveying nitrogen, and all gas distribution holes are distributed in multiple rows and columns.

[0007] In some embodiments, the gas distribution orifice extends downwardly from its axial side facing away from the reactor to its axial side facing the reactor.

[0008] In some embodiments, the gas distributor has an internal chamber capable of containing nitrogen gas, a gas distribution hole communicating with the gas chamber, an inlet pipe on the outside of the gas distributor communicating with the bottom of the gas chamber, the inlet pipe passing through the side wall of the reactor in a sealed manner, and the inlet pipe communicating with a nitrogen generator.

[0009] In some embodiments, the anthracene oxidation reactor further includes an annular guide member disposed in a receiving cavity and distributed around the axis of the reactor. The outer peripheral surface of the guide member is in contact with the inner wall surface of the reactor, the top surface of the guide member is in contact with the bottom surface of the gas distributor, the bottom side of the inner peripheral surface of the guide member contacts the inner wall surface of the reactor, and the top side of the inner peripheral surface of the guide member is vertically aligned with and in contact with the inner peripheral surface of the gas distributor. The inner peripheral surface of the guide member extends upwardly at an angle from its bottom side to its top side. And / or, the anthracene oxidation reactor further includes a stirring mechanism, which includes a stirring driver, a stirring rod, a plurality of first stirring blades, and a plurality of second stirring blades. The stirring driver is disposed... Above and fixedly connected to the top of the reactor, a stirring rod is rotatably connected to the top of the reactor. The top of the stirring rod is connected to the drive part of the stirring driver. A first stirring blade is provided at the bottom of the stirring rod, which is positioned below the preset material level of the reactants and is used to stir the reactants. A second stirring blade is provided in the middle of the stirring rod, which is positioned above the preset material level of the reactants and is used to uniformly distribute nitrogen gas. And / or, the anthracene oxidation reactor also includes a discharge mechanism, which includes a discharge pipe and a second shut-off valve. The discharge pipe is connected to the bottom of the reactor and communicates with the receiving cavity, and the second shut-off valve is installed on the discharge pipe.

[0010] In some embodiments, the second feeding mechanism includes a drip tube that is sealed to the top of the reactor. The top end of the drip tube is connected to a hydrogen peroxide supply device, the bottom end of the drip tube is located in the receiving cavity, the drip tube passes through the inside of the gas distributor, the bottom of the drip tube is connected to the inner wall of the reactor via a connecting rod, and the middle part of the drip tube is connected to the inner part of the gas distributor via a connecting piece.

[0011] In some embodiments, the outer periphery of the dropping tube is provided with circumferentially spaced condenser plates that extend along the length of the dropping tube.

[0012] In some embodiments, the first feeding mechanism includes a hopper, a feed pipe, and a first shut-off valve; the hopper is disposed above the reactor, the feed pipe is connected to the top of the reactor and communicates with the receiving cavity, the top end of the feed pipe communicates with the bottom end of the hopper, and the first shut-off valve is installed on the feed pipe and located above the reactor; and / or, the venting mechanism includes an vent pipe connected to the top of the reactor and communicates with the receiving cavity.

[0013] In some embodiments, at least a portion of the heating tube is configured to extend spirally, and the spirally extended portion of the heating tube surrounds the axis of the reactor. The heating tube is located below the preset material level of the reaction raw materials, and both ends of the heating tube can be connected to the liquid inlet and liquid outlet of the heating device, respectively.

[0014] Another aspect of this utility model provides an alkylanthraquinone production system, which includes a heating device, a gas treatment device, a hydrogen peroxide supply device, and the anthracene oxidation reaction device described in the above embodiment; the gas treatment device is connected to an exhaust mechanism, the heating device is circulatedly connected to a heating pipe, and the hydrogen peroxide supply mechanism is connected to a second feeding mechanism.

[0015] The above-mentioned technical solution of this utility model has the following beneficial effects: A gas distributor is positioned within the containment cavity and above the pre-set material level of the reactants. This allows the gas distributor to distribute nitrogen gas above the pre-set material level, reducing the overall oxygen concentration. Furthermore, the gas distributor is cylindrical and distributed around the axis of the reactor, resulting in a large distribution range. This ensures that nitrogen gas is evenly distributed across all locations above the pre-set material level, further reducing local oxygen concentrations (i.e., preventing high oxygen concentrations in localized areas). Therefore, when the nitrogen generator supplies nitrogen to the gas distributor, the distributor evenly distributes the nitrogen above the pre-set material level, allowing nitrogen and oxygen to mix and reducing the oxygen concentration in the containment cavity, thereby reducing the risk of combustion and explosion. Thus, by employing the anthracene oxidation reactor of this invention, the oxygen concentration can be reduced, thereby lowering the risk of combustion and explosion. Attached Figure Description

[0016] Figure 1 This is a cross-sectional schematic diagram of an anthracene oxidation reaction apparatus in one embodiment of the present invention; Figure 2 This is a three-dimensional schematic diagram of a gas distributor in one embodiment of the present invention; Figure 3 This is a schematic diagram of the air chamber distribution in one embodiment of the present invention; Figure 4 yes Figure 3 A magnified view of part A in the middle; Figure 5 This is a top view of a guide member in one embodiment of the present invention; Figure 6 This is a top view of a dropper in one embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures 1. Reactor; 2. Exhaust mechanism; 3. First feeding mechanism; 4. Second feeding mechanism; 5. Heating tube; 6. Gas distributor; 7. Nitrogen generator; 8. Receptacle; 9. Preset material level for reaction raw materials; 10. Gas distribution hole; 11. Gas chamber; 12. Inlet pipe; 13. Guide component; 14. Stirring driver; 15. Stirring rod; 16. First stirring blade; 17. Second stirring blade; 18. Discharge pipe; 19. Second shut-off valve; 20. Dropping pipe; 21. Connecting rod; 22. Connecting plate; 23. Condenser plate; 24. Hopper; 25. Material pipe; 26. First shut-off valve; 27. Exhaust pipe; 28. Heating device; 29. ​​Hydrogen peroxide supply device. Detailed Implementation

[0018] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. To make the objectives, technical solutions, and advantages of this utility model clearer, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a further detailed description. It should be understood that the specific embodiments described herein are intended only to explain this utility model and not to limit it. For those skilled in the art, this utility model can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this utility model by illustrating examples of it.

[0019] like Figure 1 and Figure 2 As shown, this utility model provides an anthracene oxidation reaction apparatus, which includes a reaction vessel 1, an exhaust mechanism 2, a first feeding mechanism 3, a second feeding mechanism 4, a heating tube 5, a gas distributor 6, and a nitrogen generator 7. The reaction vessel 1 has an internal receiving cavity 8. The first feeding mechanism 3 and the second feeding mechanism 4 are respectively connected to the top of the reaction vessel 1 and communicate with the receiving cavity 8. The first feeding mechanism 3 is configured to allow alkyl anthracene particles and organic solvents to enter the receiving cavity 8, and to allow hydrogen peroxide to be added dropwise into the receiving cavity 8. The heating tube 5 is disposed in the receiving cavity 8 and is circulatedly connected to a heating device 28. The heating tube 5 is used to heat the reaction raw materials in the receiving cavity 8. The exhaust mechanism 2 is connected to the top of the reaction vessel 1 and communicates with the receiving cavity 8, and is used to exhaust the gas in the receiving cavity 8. The gas distributor 6 is located in the containment cavity 8 and above the preset material level 9 of the reaction raw materials. The gas distributor 6 is cylindrical and distributed around the axis of the reactor 1. The gas distributor 6 is connected to the nitrogen generator 7, and the nitrogen generator 7 can deliver nitrogen to the containment cavity 8 through the gas distributor 6.

[0020] Specifically, alkyl anthracene particles and an organic solvent can be applied to the containment cavity 8 via the first feeding mechanism 3. In the containment cavity 8, the alkyl anthracene particles dissolve in the organic solvent to form an alkyl anthracene solution. The containment cavity 8 has a preset material level 9 for the reaction raw materials, and the liquid level of the alkyl anthracene solution does not exceed the preset material level 9. A heating tube 5 is disposed in the containment cavity 8 and is circulatedly connected to a heating device 28, allowing the heat transfer medium to circulate between the heating tube 5 and the heating device 28. When the heat transfer medium flows into the heating tube 5, it continuously and stably heats the alkyl anthracene particles and the organic solvent, accelerating the dissolution of the alkyl anthracene particles and rapidly forming the alkyl anthracene solution. Hydrogen peroxide can be added dropwise to the alkyl anthracene solution in the containment cavity 8 at a preset flow rate via the second feeding mechanism 4, ensuring that the liquid level of the mixed solution formed by the hydrogen peroxide and the alkyl anthracene solution does not exceed the preset material level 9. The heating tube 5 also continuously and stably heats the reaction raw materials (the mixed solution of alkyl anthracene solution and hydrogen peroxide), providing the high-temperature conditions required for the preparation of alkyl anthraquinone. Alkyl anthracene reacts with hydrogen peroxide under high temperature conditions to produce alkyl anthraquinone. Simultaneously, some of the hydrogen peroxide decomposes at high temperature to produce oxygen. The active oxygen produced by the hydrogen peroxide undergoes a quenching reaction to generate more oxygen, which flows above the preset material level 9 of the reaction raw materials. A gas distributor 6 is located in the containment cavity 8 and above the preset material level 9 of the reaction raw materials. Therefore, the gas distributor 6 can distribute nitrogen gas above the preset material level 9 of the reaction raw materials, reducing the overall oxygen concentration. Furthermore, the gas distributor 6 is cylindrical and distributed around the axis of the reactor 1, resulting in a large distribution range. This allows nitrogen gas to be evenly distributed at various locations above the preset material level 9 of the reaction raw materials, further reducing the local oxygen concentration (i.e., avoiding high oxygen concentrations in localized areas). Therefore, when the nitrogen generator 7 supplies nitrogen gas to the gas distributor 6, the gas distributor 6 can evenly distribute the nitrogen gas above the preset material level 9 of the reaction raw materials, allowing the nitrogen and oxygen to mix above the preset material level 9 of the reaction raw materials, reducing the oxygen concentration in the containment cavity 8, thereby reducing the risk of combustion and explosion. The mixed gas formed by mixing oxygen and nitrogen can enter the downstream gas treatment device for recycling through the exhaust mechanism 2.

[0021] In this embodiment, the gas distributor 6 is disposed in the receiving cavity 8 and is located above the preset material level 9 of the reaction raw materials. Therefore, the gas distributor 6 can distribute nitrogen gas above the preset material level 9 of the reaction raw materials, thereby reducing the overall oxygen concentration. Furthermore, the gas distributor 6 is cylindrical and distributed around the axis of the reactor 1, resulting in a large distribution range. This allows nitrogen gas to be evenly distributed at various locations above the preset material level 9 of the reaction raw materials, further reducing the local oxygen concentration (i.e., avoiding high oxygen concentrations in local areas). Therefore, when the nitrogen generator 7 supplies nitrogen gas to the gas distributor 6, the gas distributor 6 can evenly distribute the nitrogen gas above the preset material level 9 of the reaction raw materials, allowing nitrogen and oxygen to mix above the preset material level 9 of the reaction raw materials, reducing the oxygen concentration in the receiving cavity 8, and thus reducing the risk of combustion and explosion. Therefore, by employing the anthracene oxidation reaction device of this invention, the oxygen concentration can be reduced, thereby reducing the risk of combustion and explosion.

[0022] It should be noted that the nitrogen generator 7 is a common device in the field and is not an improvement of this utility model. Those skilled in the art can refer to the prior art, and this utility model will not elaborate further. For example, the nitrogen generator of the patent with publication number CN222586049U or the nitrogen generator of the patent with publication number CN223276043U can be used.

[0023] like Figure 1 and Figure 3 As shown, in some embodiments of this utility model, the outer peripheral surface of the gas distributor 6 is completely attached to the inner wall surface of the reactor 1, and the inner side of the gas distributor 6 is provided with a plurality of gas distribution holes 10 for conveying nitrogen gas. All gas distribution holes 10 are distributed in multiple rows and columns.

[0024] Specifically, the shape of the gas distributor 6 is adapted to the shape of the receiving cavity 8, so that the outer peripheral surface of the gas distributor 6 can completely adhere to the inner wall surface of the reactor 1. For example, the reactor 1 is a cylindrical tank, and the gas distributor 6 is cylindrical; their shapes are adapted to ensure that the outer peripheral surface of the gas distributor 6 completely adheres to the inner wall surface of the reactor 1. Because the outer peripheral surface of the gas distributor 6 completely adheres to the inner wall surface of the reactor 1, oxygen can flow from the inside of the gas distributor 6, so that nitrogen can be uniformly and fully mixed in with the oxygen.

[0025] like Figure 4 As shown, in some embodiments of the present invention, the gas distribution hole 10 extends downwardly from the side opposite to the axis of the reactor 1 to the side facing the axis of the reactor 1.

[0026] Specifically, the gas distribution hole 10 extends downward at an angle, allowing nitrogen gas to flow downward at an angle along the gas distribution hole 10. Oxygen flows upward, and the flow directions of nitrogen and oxygen are opposite, facilitating thorough mixing of nitrogen and oxygen.

[0027] As shown in Figure 3, in some embodiments of this utility model, the gas distributor 6 has a gas chamber 11 inside that can contain nitrogen gas, the gas distribution hole 10 is connected to the gas chamber 11, the gas distributor 6 is provided with an air inlet pipe 12 on the outside, the air inlet pipe 12 is connected to the bottom of the gas chamber 11, the air inlet pipe 12 passes through the side wall of the reactor 1 in a sealed manner, and the air inlet pipe 12 is connected to the nitrogen generator 7.

[0028] Specifically, the organic solvent in reactor 1 generates a large amount of organic vapor when heated. This organic vapor enters the gas processing device through exhaust mechanism 2, where it needs to be recovered. However, the nitrogen generated by nitrogen generator 7 (temperature generally between 10℃ and 30℃) is lower than the temperature of the gas in reactor 1 (gas temperature and ambient temperature generally between 60℃ and 140℃), resulting in a significant temperature difference. When nitrogen enters gas distributor 6, based on the temperature difference between nitrogen and organic vapor, the organic vapor condenses on the inner surface of gas distributor 6 and falls back into the reaction materials below, reducing the organic vapor content and alleviating the burden of organic vapor recovery on the gas processing device. The bottom of gas distributor 6 is closest to the reaction materials and is most easily heated; however, the connection between inlet pipe 12 and the bottom of gas chamber 11 allows for a larger temperature difference between the bottom of gas distributor 6 and the organic vapor, further reducing the organic vapor content.

[0029] like Figure 1 , Figure 3 and Figure 5 As shown, in some embodiments of this utility model, the anthracene oxidation reaction apparatus further includes an annular guide 13. The guide 13 is disposed in the receiving cavity 8 and distributed around the axis of the reaction vessel 1. The outer peripheral surface of the guide 13 is in contact with the inner wall surface of the reaction vessel 1, the top surface of the guide 13 is in contact with the bottom surface of the gas distributor 6, the bottom side of the inner peripheral surface of the guide 13 is in contact with the inner wall surface of the reaction vessel 1, the top side of the inner peripheral surface of the guide 13 is vertically aligned with and in contact with the inner peripheral surface of the gas distributor 6, and the inner peripheral surface of the guide 13 extends upwardly at an angle from its bottom side to its top side.

[0030] Specifically, there is a corner between the bottom surface of the gas distributor 6 and the inner wall surface of the reactor 1. A small amount of oxygen may remain between the bottom surface of the gas distributor 6 and the inner wall surface of the reactor 1, resulting in an excessively high local oxygen content. However, by setting the guide component 13, the oxygen can be guided to flow to the inside of the gas distributor 6, avoiding the retention of oxygen between the bottom surface of the gas distributor 6 and the inner wall surface of the reactor 1.

[0031] like Figure 1 As shown, in some embodiments of this utility model, the anthracene oxidation reaction apparatus further includes a stirring mechanism, which includes a stirring driver 14, a stirring rod 15, a plurality of first stirring blades 16, and a plurality of second stirring blades 17. The stirring driver 14 is disposed above the reactor 1 and fixedly connected to the top of the reactor 1. The stirring rod 15 is rotatably connected to the top of the reactor 1. The top end of the stirring rod 15 is connected to the driving part of the stirring driver 14. The bottom of the stirring rod 15 is provided with first stirring blades 16, which are disposed below the preset material level 9 of the reaction raw materials and are used to stir the reaction raw materials. The middle part of the stirring rod 15 is provided with second stirring blades 17, which are disposed above the preset material level 9 of the reaction raw materials and are used to uniformly distribute nitrogen gas.

[0032] Specifically, the stirring rod 15 is sealed through the top of the reactor 1. The stirring rod 15 is rotatable relative to the reactor 1, with its top end extending out of the reactor 1 and its middle and bottom parts located in the receiving cavity 8. The driving part of the stirring actuator 14 is connected to the top end of the stirring rod 15. The stirring actuator 14 can be a device with driving capability, such as a motor. The stirring actuator 14 can drive the stirring rod 15 to rotate circumferentially, which in turn drives the first stirring blade 16 to rotate. The first stirring blade 16 can stir the alkyl anthracene particles and organic solvent, quickly forming an alkyl anthracene solution. Furthermore, during the dropwise addition of hydrogen peroxide to the alkyl anthracene solution, the first stirring blade 16 can stir the alkyl anthracene solution and hydrogen peroxide, ensuring that the hydrogen peroxide is evenly dispersed in the alkyl anthracene solution, avoiding localized and violent exothermic reactions due to excessively high local hydrogen peroxide concentration, and improving reaction safety. Moreover, the stirring rod 15 can drive the second stirring blade 17 to rotate circumferentially, which can agitate the oxygen and nitrogen, ensuring thorough mixing of the nitrogen and oxygen, thereby reducing the oxygen concentration. Preferably, the second stirring blade 17 is disposed inside the gas distributor 6.

[0033] like Figure 1 As shown, in some embodiments of this utility model, the anthracene oxidation reaction apparatus further includes a discharge mechanism, which includes a discharge pipe 18 and a second shut-off valve 19. The discharge pipe 18 is connected to the bottom of the reactor 1 and communicates with the receiving cavity 8, and the second shut-off valve 19 is installed on the discharge pipe 18.

[0034] Specifically, opening the second shut-off valve 19 allows the reaction raw materials (alkyl anthracene solution and hydrogen peroxide) and the reaction product (alkyl anthraquinone) to flow out from the discharge pipe 18; closing the second shut-off valve 19 prevents the reaction raw materials (alkyl anthracene solution and hydrogen peroxide) and the reaction product (alkyl anthraquinone) from flowing out from the discharge pipe 18.

[0035] like Figure 1 As shown, in some embodiments of this utility model, the second feeding mechanism 4 includes a dripping tube 20, which is sealed to the top of the reactor 1. The top end of the dripping tube 20 can communicate with the hydrogen peroxide supply device 29. The bottom end of the dripping tube 20 is located in the receiving cavity 8. The dripping tube 20 passes through the inside of the gas distributor 6. The bottom of the dripping tube 20 is connected to the inner wall of the reactor 1 through a connecting rod 21. The middle part of the dripping tube 20 is connected to the inner part of the gas distributor 6 through a connecting piece 22.

[0036] Specifically, the hydrogen peroxide supply device 29 delivers hydrogen peroxide to the dropper 20 at a preset flow rate, and the dropper 20 drips hydrogen peroxide into the alkyl anthracene solution at the preset flow rate. Excessive application of hydrogen peroxide can cause severe exothermic reactions, so to improve safety, it is typically applied by dripping. The connecting rod 21 enhances the stability of the dropper 20, preventing it from shaking. The temperature of the hydrogen peroxide is room temperature, approximately in the range of 10°C-30°C, so the temperature of the dropper 20 is also lower than the temperature of the gas in the containment cavity 8, resulting in a significant temperature difference. The dropper 20 is connected to the inside of the gas distributor 6 via a connecting piece 22. This connection increases the stability of the dropper 20, and the temperature of the connecting piece 22 is also lower than the temperature of the gas in the containment cavity 8, allowing organic vapors to condense at the connecting piece 22 (which is a sheet-like component with a large outer surface area), reducing the content of organic vapors.

[0037] like Figure 6 As shown, in some embodiments of this utility model, the outer periphery of the dripping tube 20 is provided with condenser plates 23 distributed circumferentially, and the condenser plates 23 extend along the length direction of the dripping tube 20.

[0038] Specifically, the temperature of the hydrogen peroxide is room temperature, approximately in the range of 10℃-30℃. Therefore, the temperature of the drip tube 20 is also lower than the temperature of the gas in the receiving chamber 8, resulting in a significant temperature difference. By setting up the condenser plate 23, more organic vapors can be condensed, reducing the burden on the gas treatment device to recover and process organic vapors.

[0039] It should be noted that the second feeding mechanism 4 can also be any structural form in the art that can meet the usage requirements of this utility model, and this utility model is not limited thereto. For example, it can be the feeding mechanism of the patent with publication number CN222489966U or the feeding mechanism of the patent with publication number CN222131818U.

[0040] like Figure 1 As shown, in some embodiments of this utility model, the first feeding mechanism 3 includes a hopper 24, a feed pipe 25, and a first shut-off valve 26; the hopper 24 is disposed above the reactor 1, the feed pipe 25 is connected to the top of the reactor 1 and communicates with the receiving cavity 8, the top end of the feed pipe 25 is connected to the bottom end of the hopper 24, and the first shut-off valve 26 is installed on the feed pipe 25 and located above the reactor 1.

[0041] Specifically, the first shut-off valve 26 is opened, and alkyl anthracene particles are added to the hopper 24. The alkyl anthracene particles enter the receiving chamber 8 through the hopper 24 and the feed pipe 25. Then, an organic solvent is added to the hopper 24. The organic solvent enters the receiving chamber 8 through the hopper 24 and the feed pipe 25. Finally, the second shut-off valve 19 is closed.

[0042] It should be noted that the first feeding mechanism 3 can also be any structural form in the art that can meet the usage requirements of this utility model, and this utility model is not limited thereto. For example, it can be the feeding mechanism in the patent with publication number CN222606281U or the feeding mechanism in the patent with publication number CN222489896U.

[0043] In some embodiments of this utility model, the exhaust mechanism 2 includes an exhaust pipe 27, which is connected to the top of the reactor 1 and communicates with the receiving cavity 8.

[0044] Specifically, the gas in the containment chamber 8 (such as oxygen, nitrogen, and organic vapors) can exit the containment chamber 8 through the exhaust pipe 27. A gas processing device can be connected to the exhaust pipe 27 to recover and process the gas.

[0045] It should be noted that the exhaust mechanism 2 can also be any structural form in the art that can meet the usage requirements of this utility model, and this utility model is not limited thereto. For example, it can be the exhaust mechanism in the patent with publication number CN222534954U or the exhaust mechanism in the patent with publication number CN221207951U.

[0046] like Figure 1As shown, in some embodiments of this utility model, at least a portion of the heating tube 5 is configured to extend spirally, and the spirally extended portion of the heating tube 5 surrounds the axis of the reactor 1. The heating tube 5 is located below the preset material level 9 of the reaction raw materials, and both ends of the heating tube 5 can be connected to the liquid inlet and liquid outlet of the heating device 28, respectively.

[0047] Specifically, the reactants (alkyl anthracene solution and hydrogen peroxide) can be contained below the preset material level 9. The heating tube 5 is positioned below the preset material level 9 and can be submerged by the reactants, thus directly heating them. At least a portion of the heating tube 5 is spirally extended, resulting in a longer length and improved heating efficiency.

[0048] like Figure 1 As shown, this utility model also provides an alkylanthraquinone production system, which includes a heating device 28, a gas treatment device, a hydrogen peroxide supply device 29, and the anthracene oxidation reaction device described in the above embodiment. The gas treatment device is connected to the exhaust mechanism 2 to recover the gas in the containment chamber 8. The heating device 28 is circulatedly connected to the heating pipe 5, and the heat transfer medium can circulate between the heating device 28 and the heating pipe 5, enabling the heating pipe 5 to be heated. The hydrogen peroxide supply mechanism is connected to the second feeding mechanism 4, and the hydrogen peroxide supply mechanism can supply hydrogen peroxide to the second feeding mechanism 4 at a preset flow rate, so that the hydrogen peroxide can be dripped into the alkylanthraquinone solution in a preset flow direction.

[0049] Specifically, since the alkylanthraquinone production system uses the anthracene oxidation reaction device described in the above embodiment, the alkylanthraquinone production system can also achieve the above-mentioned technical effects.

[0050] It should be noted that the hydrogen peroxide supply device 29 is a common device in the field, and this utility model can adopt any structural form that meets the usage requirements of this utility model, and this utility model is not limited. For example, the hydrogen peroxide supply device 29 can adopt the liquid supply device of the patent with publication number CN118998982A or the liquid supply device of the patent with publication number CN221813883U.

[0051] It should also be noted that the heating device 28 and the gas handling device are common devices in the art and are not improvements of this utility model. Those skilled in the art can refer to the prior art, and this utility model will not elaborate further. For example, the heating device of the patent with publication number CN118794047B or the heating device of the patent with publication number CN222417988U can be used. For example, the gas handling device of the patent with publication number CN117980652A can be used.

[0052] It should also be noted that the anthracene oxidation reaction apparatus and alkylanthraquinone production system of this invention can be applied not only to anthracene oxidation reactions, but also to other oxidation reactions and hydrogenation reactions to reduce the risk of combustion and explosion; this invention does not impose any limitations. For example, it can be applied to the oxidation of other polycyclic aromatic hydrocarbons, such as the oxidation of phenanthrene to phenanthrenequinone and the oxidation of pyrene to pyrenequinone. For example, it can also be applied to the oxidation of phenols, such as the oxidation of para-substituted phenols to p-benzoquinone and the oxidation of biphenol. For example, it can also be applied to benzylic oxidation reactions, such as the oxidation of toluene derivatives to benzoic acid derivatives. For example, it can also be applied to catalytic hydrogenation reactions, such as the hydrogenation of unsaturated compounds and the hydrogenation of nitro compounds.

[0053] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above are only preferred embodiments of this utility model. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of this utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. An anthracene oxidation reactor, characterized in that, It includes a reaction vessel (1), an exhaust mechanism (2), a first feeding mechanism (3), a second feeding mechanism (4), a heating tube (5), a gas distributor (6), and a nitrogen generator (7); The reactor (1) has an internal cavity (8). The first feeding mechanism (3) and the second feeding mechanism (4) are respectively connected to the top of the reactor (1) and are respectively connected to the cavity (8). The first feeding mechanism (3) is configured to allow alkyl anthracene particles and organic solvents to enter the cavity (8). The first feeding mechanism (3) is configured to allow hydrogen peroxide to be added dropwise into the cavity (8). The heating tube (5) is disposed in the receiving cavity (8) and can be circulatedly connected to the heating device (28). The heating tube (5) is used to heat the reaction raw materials in the receiving cavity (8). The exhaust mechanism (2) is connected to the top of the reaction vessel (1) and is connected to the receiving cavity (8). The exhaust mechanism (2) is used to exhaust the gas in the receiving cavity (8). The gas distributor (6) is disposed in the containment cavity (8) and located above the preset material level (9) of the reaction raw material. The gas distributor (6) is cylindrical and distributed around the axis of the reaction vessel (1). The gas distributor (6) is connected to the nitrogen generator (7). The nitrogen generator (7) can deliver nitrogen to the containment cavity (8) through the gas distributor (6).

2. The anthracene oxidation reactor according to claim 1, characterized in that, The outer peripheral surface of the gas distributor (6) is completely attached to the inner wall of the reactor (1). The inner side of the gas distributor (6) is provided with a plurality of gas distribution holes (10) for conveying nitrogen. All the gas distribution holes (10) are distributed in multiple rows and columns.

3. The anthracene oxidation reactor according to claim 2, characterized in that, The gas distribution hole (10) extends downward at an angle from its side facing away from the reactor (1) to its side facing the reactor (1).

4. The anthracene oxidation reactor according to claim 2, characterized in that, The gas distributor (6) has a gas chamber (11) inside that can contain nitrogen gas. The gas distribution hole (10) is connected to the gas chamber (11). An air inlet pipe (12) is provided on the outside of the gas distributor (6). The air inlet pipe (12) is connected to the bottom of the gas chamber (11). The air inlet pipe (12) passes through the side wall of the reactor (1) in a sealed manner. The air inlet pipe (12) is connected to the nitrogen generator (7).

5. The anthracene oxidation reactor according to claim 1, characterized in that, The anthracene oxidation reactor also includes an annular guide (13), which is disposed in the receiving cavity (8) and distributed around the axis of the reactor (1). The outer peripheral surface of the guide (13) is in contact with the inner wall of the reactor (1), the top surface of the guide (13) is in contact with the bottom surface of the gas distributor (6), the bottom side of the inner peripheral surface of the guide (13) is in contact with the inner wall of the reactor (1), the top side of the inner peripheral surface of the guide (13) is vertically aligned with and in contact with the inner peripheral surface of the gas distributor (6), and the inner peripheral surface of the guide (13) extends upward at an angle from its bottom side to its top side. And / or, the anthracene oxidation reaction apparatus further includes a stirring mechanism, which includes a stirring driver (14), a stirring rod (15), a plurality of first stirring blades (16) and a plurality of second stirring blades (17); the stirring driver (14) is disposed above the reactor (1) and fixedly connected to the top of the reactor (1); the stirring rod (15) is rotatably connected to the top of the reactor (1); the top end of the stirring rod (15) is connected to the driving part of the stirring driver (14); the bottom of the stirring rod (15) is provided with the first stirring blades (16); the first stirring blades (16) are disposed below the preset material level (9) of the reaction raw materials and are used to stir the reaction raw materials; the middle part of the stirring rod (15) is provided with the second stirring blades (17); the second stirring blades (17) are disposed above the preset material level (9) of the reaction raw materials and are used to make nitrogen gas evenly distributed; And / or, the anthracene oxidation reactor further includes a discharge mechanism, which includes a discharge pipe (18) and a second shut-off valve (19). The discharge pipe (18) is connected to the bottom of the reactor (1) and communicates with the containment cavity (8). The second shut-off valve (19) is installed on the discharge pipe (18).

6. The anthracene oxidation reactor according to claim 1, characterized in that, The second feeding mechanism (4) includes a drip tube (20), which is sealed to the top of the reactor (1). The top end of the drip tube (20) can communicate with the hydrogen peroxide supply device (29). The bottom end of the drip tube (20) is located in the receiving cavity (8). The drip tube (20) passes through the inside of the gas distributor (6). The bottom of the drip tube (20) is connected to the inner wall of the reactor (1) through a connecting rod (21). The middle part of the drip tube (20) is connected to the inner part of the gas distributor (6) through a connecting piece (22).

7. The anthracene oxidation reactor according to claim 6, characterized in that, The outer periphery of the drip tube (20) is provided with condenser plates (23) spaced out in a circumferential direction, and the condenser plates (23) extend along the length direction of the drip tube (20).

8. The anthracene oxidation reactor according to claim 1, characterized in that, The first feeding mechanism (3) includes a hopper (24), a feed pipe (25), and a first shut-off valve (26); the hopper (24) is located above the reactor (1), the feed pipe (25) is connected to the top of the reactor (1) and communicates with the receiving cavity (8), the top end of the feed pipe (25) is connected to the bottom end of the hopper (24), and the first shut-off valve (26) is installed on the feed pipe (25) and located above the reactor (1); And / or, the exhaust mechanism (2) includes an exhaust pipe (27) connected to the top of the reactor (1) and in communication with the containment cavity (8).

9. The anthracene oxidation reactor according to claim 1, characterized in that, At least a portion of the heating tube (5) is configured to extend in a spiral manner, and the spirally extended portion of the heating tube (5) surrounds the axis of the reactor (1). The heating tube (5) is located below the preset material level (9) of the reaction raw material. The two ends of the heating tube (5) can be connected to the liquid inlet and liquid outlet of the heating device (28) respectively.

10. An alkylanthraquinone production system, characterized in that, It includes a heating device (28), a gas treatment device, a hydrogen peroxide supply device (29), and an anthracene oxidation reaction device according to any one of claims 1-9; the gas treatment device is connected to the exhaust mechanism (2), the heating device (28) is circulatedly connected to the heating pipe (5), and the hydrogen peroxide supply mechanism is connected to the second feeding mechanism (4).

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