Alkyl p-benzoquinone production device

Abstract

The utility model discloses an alkyl p-benzoquinone production device, and relates to the technical field of alkyl p-benzoquinone production, an inlet of a reaction kettle is respectively communicated with a benzoquinone tank, an alkyl reagent tank, an AlCl3 catalyst tank and a toluene solvent tank, an outlet of the reaction kettle is communicated with a standing layering tank, an outlet of the standing layering tank is communicated with a reduced pressure distillation tank, and the reduced pressure distillation tank is communicated with a toluene solvent tank. A bottom outlet of the reduced pressure distillation tank is communicated with a dissolving tank, an inlet of the dissolving tank is communicated with an ethanol-water solvent tank, an outlet of the dissolving tank is communicated with a recrystallization tank, an outlet of the recrystallization tank is communicated with a first centrifugal machine, a solid phase outlet of the first centrifugal machine is communicated with a first dryer, and an outlet of the first dryer is communicated with an alkyl p-benzoquinone finished product tank. The automation degree is high, manual operation is reduced, the production efficiency is improved, and the consistency and stability of products are guaranteed. And the product is high in yield and purity, low in production cost and environment-friendly.

Description

Technical Field

[0001] This utility model relates to the field of alkyl-p-benzoquinone production technology, and specifically to an alkyl-p-benzoquinone production apparatus. Background Technology

[0002] Alkyl-p-benzoquinones are an important class of organic compounds with wide applications in medicine, pesticides, dyes, and other fields. Currently, traditional methods for synthesizing alkyl-p-benzoquinones suffer from problems such as harsh reaction conditions, low yields, and numerous side reactions. The paper "Direct Catalytic Oxidation of Phenol to P-benzoquinone" (Song Wei et al., Fine Petrochemicals, 2008, 25(3): 55-58) reported suitable reaction conditions for the catalytic oxidation of phenol to p-benzoquinone: using ethanol as solvent and CuCl2·2H2O and LiCl·H2O as catalysts. Under these conditions, the phenol conversion rate reached 85%, and the p-benzoquinone selectivity reached 83%, but the yield was low. Furthermore, a large amount of waste acid containing organic solvents was generated, making subsequent treatment difficult, resulting in low purity, increased production costs, and environmental harm. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an alkyl-p-benzoquinone production device that addresses the shortcomings of the existing technology, has a high product yield, low production cost, and is environmentally friendly.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0005] An apparatus for producing alkyl-p-benzoquinone includes a reaction vessel. The inlet of the reaction vessel is connected via pipelines to a benzoquinone tank, an alkyl reagent tank, an AlCl3 catalyst tank, and a toluene solvent tank. The outlet of the reaction vessel is connected via pipelines to a settling tank. The outlet of the settling tank is connected via pipelines to a vacuum distillation tank. The bottom outlet of the vacuum distillation tank is connected via pipelines to a dissolving tank. The inlet of the dissolving tank is connected via pipelines to an ethanol-water solvent tank. The outlet of the dissolving tank is connected via pipelines to a recrystallization tank. The outlet of the recrystallization tank is connected via pipelines to a first centrifuge. The solid phase outlet of the first centrifuge is connected via pipelines to a first dryer. The outlet of the first dryer is connected via pipelines to an alkyl-p-benzoquinone finished product tank.

[0006] As an improved technical solution, the inlet of the reactor is connected to a quenching water tank via a pipeline.

[0007] As an improved technical solution, the outlet of the settling tank is connected to a decolorizing tank via a pipe, the inlet of the decolorizing tank is connected to an activated carbon tank via a pipe, the outlet of the decolorizing tank is connected to a filter via a pipe, and the outlet of the filter is connected to the vacuum distillation tank via a pipe.

[0008] As an improved technical solution, the top gas phase outlet of the vacuum distillation tank is connected to a toluene recovery tank via a pipeline, and the outlet of the toluene recovery tank is connected to the toluene solvent tank via a pipeline.

[0009] As an improved technical solution, the liquid phase outlet of the first centrifuge is connected to a mother liquor tank via a pipeline.

[0010] As an improved technical solution, the outlet of the settling and stratification tank is connected to a regulating tank via a pipeline, the inlet of the regulating tank is connected to a hydrochloric acid solution tank via a pipeline, the outlet of the regulating tank is connected to a concentration crystallization tank via a pipeline, the outlet of the concentration crystallization tank is connected to a second centrifuge via a pipeline, the solid phase outlet of the second centrifuge is connected to a second dryer via a pipeline, and the outlet of the second dryer is connected to an AlCl3 crystal tank via a pipeline.

[0011] As a preferred technical solution, the liquid phase outlet of the second centrifuge is connected to an activated carbon adsorption tank via a pipeline, and the outlet of the activated carbon adsorption tank is connected to a recovery water tank via a pipeline.

[0012] As a preferred technical solution, the outlet of the activated carbon adsorption tank is connected to an ion exchange resin column via a pipeline, and the outlet of the ion exchange resin column is connected to the recycled water tank via a pipeline.

[0013] As a preferred technical solution, the outlet of the recycling water tank is connected to the quenching water tank via a pipeline.

[0014] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0015] This invention discloses an alkyl-p-benzoquinone production apparatus, comprising a reaction vessel. The inlet of the reaction vessel is connected via pipes to a benzoquinone tank, an alkyl reagent tank, an AlCl3 catalyst tank, and a toluene solvent tank. The outlet of the reaction vessel is connected via a pipe to a settling and separation tank. The outlet of the settling and separation tank is connected via a pipe to a vacuum distillation tank. The bottom outlet of the vacuum distillation tank is connected via a pipe to a dissolving tank. The inlet of the dissolving tank is connected via a pipe to an ethanol-water solvent tank. The outlet of the dissolving tank is connected via a pipe to a recrystallization tank. The outlet of the recrystallization tank is connected via a pipe to a first centrifuge. The solid phase outlet of the first centrifuge is connected via a pipe to a first dryer. The outlet of the first dryer is connected via a pipe to an alkyl-p-benzoquinone finished product tank. The reaction liquid after the reaction enters the settling and separation tank. The separated organic phase directly enters the vacuum distillation tank. Utilizing the characteristic of vacuum distillation to lower the boiling point of the solvent, the toluene solvent and crude product are efficiently separated at a lower temperature, avoiding the damage to the alkyl-p-benzoquinone structure caused by high temperatures, improving product quality, and simultaneously achieving effective recovery of the toluene solvent, thus reducing production costs. The crude product obtained from vacuum distillation is directly fed into a dissolving tank, where it is dissolved in an ethanol-water solvent. It then proceeds to a recrystallization tank for crystallization and purification. Recrystallization further removes impurities, improving the purity of the alkyl-p-benzoquinone and ensuring product quality. A first centrifuge rapidly separates the recrystallized crystals from the mother liquor, offering higher efficiency compared to traditional filtration methods. The separated crystals are then dried in a first dryer to remove residual solvent, ultimately yielding qualified alkyl-p-benzoquinone and storing it in a finished product tank. This process is highly automated, reducing manual operation, improving production efficiency, and ensuring product consistency and stability. The product boasts high yield and purity, low production costs, and is environmentally friendly.

[0016] The inlet of the reactor of this invention is connected to a quenching water tank via a pipeline. After the reaction is completed, quenching water can be added to the reactor in a timely manner through the pipeline to quickly terminate the reaction, hydrolyze the unreacted AlCl3, avoid the increase of by-products due to over-reaction, and at the same time reduce the temperature of the reaction system to ensure the safety and stability of subsequent separation operations.

[0017] The outlet of the settling and stratification tank is connected to a decolorization tank via a pipeline. The inlet of the decolorization tank is connected to an activated carbon tank via a pipeline. The outlet of the decolorization tank is connected to a filter via a pipeline. The outlet of the filter is connected to the vacuum distillation tank via a pipeline. Before entering the vacuum distillation tank, the stratified organic phase first enters the decolorization tank, where the adsorption properties of activated carbon remove pigments and other impurities from the organic phase. Then, it passes through the filter to further ensure the purity of the material entering the vacuum distillation tank, improve the quality of subsequent products, reduce the impact of impurities on the distillation equipment, and extend the equipment's service life.

[0018] The top vapor outlet of the vacuum distillation tank is connected to a toluene recovery tank via a pipeline, and the outlet of the toluene recovery tank is connected to the toluene solvent tank via a pipeline. Toluene gas volatilized during vacuum distillation is introduced into the toluene recovery tank through a pipeline, condensed and recovered, and then recycled back to the toluene solvent tank for reuse. This achieves closed-loop utilization of toluene solvent, reduces production costs, minimizes organic solvent emissions, and aligns with the concept of green and environmentally friendly production.

[0019] The liquid outlet of the first centrifuge is connected to a mother liquor tank via a pipeline. The mother liquor separated by the first centrifuge still contains a small amount of toluene solvent, uncrystallized products, and ethanol. Toluene and ethanol can be recovered again by subsequent distillation, and the uncrystallized products can be treated again to improve the utilization rate of raw materials, reduce material waste, and lower production costs.

[0020] The outlet of the settling and stratification tank is connected to a regulating tank via a pipeline. The inlet of the regulating tank is connected to a hydrochloric acid solution tank via a pipeline. The outlet of the regulating tank is connected to a concentration and crystallization tank via a pipeline. The outlet of the concentration and crystallization tank is connected to a second centrifuge via a pipeline. The solid phase outlet of the second centrifuge is connected to a second dryer via a pipeline. The outlet of the second dryer is connected to an AlCl3 crystal tank via a pipeline. The stratified aqueous phase enters the regulating tank, where hydrochloric acid solution is added to adjust the pH, causing the aluminum hydroxide precipitate to dissolve and form an AlCl3 solution. This solution then sequentially enters the concentration and crystallization tank, the second centrifuge, and the second dryer, achieving the recovery and reuse of the AlCl3 catalyst. This process effectively reduces catalyst costs, decreases waste emissions, improves resource utilization, and enhances the economic and environmental benefits of the production process.

[0021] The liquid phase outlet of the second centrifuge is connected to an activated carbon adsorption tank via a pipeline, and the outlet of the activated carbon adsorption tank is connected to a recovery water tank via a pipeline. The liquid phase separated by the second centrifuge may contain a small amount of organic matter, which is removed by adsorption in the activated carbon adsorption tank. The purified aqueous solution enters the recovery water tank, achieving preliminary purification and recovery of water resources, reducing the consumption of fresh water, lowering production costs, reducing wastewater discharge, and alleviating environmental pressure.

[0022] The outlet of the activated carbon adsorption tank is connected to an ion exchange resin column via a pipeline, and the outlet of the ion exchange resin column is connected to the recovery water tank via a pipeline. Based on the initial purification by activated carbon adsorption, the ion exchange resin column further removes residual impurity ions in the water, such as metal ions and acid radicals, achieving a high purity in the recovered water. This meets the requirements for use as quenching water in production processes, improves the efficiency of water resource recycling, and ensures the stable operation of the production process.

[0023] The outlet of the recycled water tank is connected to the quenching water tank via a pipeline. This achieves the recycling of water resources, allowing the treated recycled water to be reused in production as quenching water, reducing the consumption of fresh water and lowering production costs. At the same time, it reduces wastewater discharge, conforms to the concepts of clean production and sustainable development, and improves the environmental benefits of the entire production process. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0026] The components include: 1. Reactor; 2. Benzoquinone tank; 3. Alkyl reagent tank; 4. AlCl3 catalyst tank; 5. Toluene solvent tank; 6. Settling and layering tank; 7. Vacuum distillation tank; 8. Dissolving tank; 9. Ethanol-water solvent tank; 10. Recrystallization tank; 11. First centrifuge; 12. First dryer; 13. Alkyl-p-benzoquinone finished product tank; 14. Quenching water tank; 15. Decolorization tank; 16. Activated carbon tank; 17. Filter; 18. Toluene recovery tank; 19. Mother liquor tank; 20. Adjustment tank; 21. Hydrochloric acid solution tank; 22. Concentration and crystallization tank; 23. Second centrifuge; 24. Second dryer; 25. AlCl3 crystal tank; 26. Activated carbon adsorption tank; 27. Recovered water tank; 28. Ion exchange resin column. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] like Figure 1As shown, an alkyl-p-benzoquinone production apparatus includes a reaction vessel 1. The inlet of the reaction vessel 1 is connected via pipes to a benzoquinone tank 2, an alkyl reagent tank 3, an AlCl3 catalyst tank 4, and a toluene solvent tank 5. The outlet of the reaction vessel 1 is connected via pipes to a settling tank 6. The outlet of the settling tank 6 is connected via pipes to a vacuum distillation tank 7. The bottom outlet of the vacuum distillation tank 7 is connected via pipes to a dissolving tank 8. The inlet of the dissolving tank 8 is connected via pipes to an ethanol-water solvent tank 9. The outlet of the dissolving tank 8 is connected via pipes to a recrystallization tank 10. The outlet of the recrystallization tank 10 is connected via pipes to a first centrifuge 11. The solid phase outlet of the first centrifuge 11 is connected via pipes to a first dryer 12. The outlet of the first dryer 12 is connected via pipes to an alkyl-p-benzoquinone finished product tank 13. The reaction solution after the reaction enters a settling and separation tank 6. The separated organic phase directly enters a vacuum distillation tank 7. Utilizing the characteristic of vacuum distillation to lower the solvent boiling point, toluene solvent and crude product are efficiently separated at a lower temperature, avoiding the damage to the alkyl-p-benzoquinone structure caused by high temperatures, improving product quality, and simultaneously achieving effective recovery of toluene solvent, reducing production costs. The crude product obtained from vacuum distillation directly enters a dissolving tank 8, where it is mixed and dissolved with an ethanol-water solvent, and then enters a recrystallization tank 10 for crystallization purification. Recrystallization further removes impurities, improves the purity of alkyl-p-benzoquinone, and ensures product quality. A first centrifuge 11 quickly separates the recrystallized crystals from the mother liquor, which is more efficient than traditional filtration methods. The separated crystals enter a first dryer 12 for drying to remove residual solvent, finally obtaining qualified alkyl-p-benzoquinone finished product, which is stored in a finished product tank. This process has a high degree of automation, reduces manual operation, improves production efficiency, and ensures product consistency and stability. The product has high yield and purity, low production cost, and is environmentally friendly.

[0029] The inlet of reactor 1 is connected to a quenching water tank 14 via a pipeline. After the reaction is completed, quenching water can be added to reactor 1 through the pipeline in a timely manner to quickly terminate the reaction, hydrolyze the unreacted AlCl3, avoid the increase of by-products due to over-reaction, and at the same time reduce the temperature of the reaction system to ensure the safety and stability of subsequent separation operations.

[0030] The outlet of the settling and stratification tank 6 is connected to a decolorizing tank 15 via a pipe. The inlet of the decolorizing tank 15 is connected to an activated carbon tank 16 via a pipe. The outlet of the decolorizing tank 15 is connected to a filter 17 via a pipe. The outlet of the filter 17 is connected to the vacuum distillation tank 7 via a pipe. Before entering the vacuum distillation tank, the stratified organic phase first enters the decolorizing tank 15, where the activated carbon removes pigments and other impurities from the organic phase through adsorption. Then, it passes through the filter 17 for filtration, further ensuring the purity of the material entering the vacuum distillation tank 7, improving the quality of subsequent products, reducing the impact of impurities on the distillation equipment, and extending the service life of the equipment.

[0031] The top gas phase outlet of the vacuum distillation tank 7 is connected to a toluene recovery tank 18 via a pipeline, and the outlet of the toluene recovery tank 18 is connected to the toluene solvent tank 5 via a pipeline. Toluene gas volatilized during vacuum distillation is introduced into the toluene recovery tank 18 through a pipeline, condensed and recovered, and then recycled back to the toluene solvent tank 5, achieving closed-loop utilization of toluene solvent, reducing production costs, and minimizing organic solvent emissions, in line with the concept of green and environmentally friendly production.

[0032] The liquid outlet of the first centrifuge 11 is connected to a mother liquor tank 19 via a pipeline. The mother liquor separated by the first centrifuge 11 still contains a small amount of toluene solvent, uncrystallized products, and ethanol. By collecting the mother liquor and distilling it, the toluene and ethanol can be recovered again, and the uncrystallized products can be processed again, thereby improving the utilization rate of raw materials, reducing material waste, and lowering production costs.

[0033] The outlet of the settling and stratification tank 6 is connected to an equalization tank 20 via a pipeline. The inlet of the equalization tank 20 is connected to a hydrochloric acid solution tank 21 via a pipeline. The outlet of the equalization tank 20 is connected to a concentration and crystallization tank 22 via a pipeline. The outlet of the concentration and crystallization tank 22 is connected to a second centrifuge 23 via a pipeline. The solid phase outlet of the second centrifuge 23 is connected to a second dryer 24 via a pipeline. The outlet of the second dryer 24 is connected to an AlCl3 crystallization tank 25 via a pipeline. The stratified aqueous phase enters the equalization tank 20, where hydrochloric acid solution is added to adjust the pH, causing the aluminum hydroxide precipitate to dissolve and form an AlCl3 solution. This solution then sequentially enters the concentration and crystallization tank 22, the second centrifuge 23, and the second dryer 24, achieving the recovery and reuse of the AlCl3 catalyst. This process effectively reduces catalyst costs, reduces waste emissions, improves resource utilization, and enhances the economic and environmental benefits of the production process.

[0034] The liquid phase outlet of the second centrifuge 23 is connected to an activated carbon adsorption tank 26 via a pipeline, and the outlet of the activated carbon adsorption tank 26 is connected to a recovery water tank 27 via a pipeline. The liquid phase separated by the second centrifuge 23 may contain a small amount of organic matter, which is removed by adsorption in the activated carbon adsorption tank 26. The purified aqueous solution enters the recovery water tank 27, achieving preliminary purification and recovery of water resources, reducing the use of fresh water, lowering production costs, reducing wastewater discharge, and alleviating environmental pressure.

[0035] The outlet of the activated carbon adsorption tank 26 is connected to an ion exchange resin column 28 via a pipeline, and the outlet of the ion exchange resin column 28 is connected to the recovery water tank 27 via a pipeline. Based on the initial purification by activated carbon adsorption, the ion exchange resin column 28 further removes residual impurity ions in the water, such as metal ions and acid radicals, thereby achieving a high purity of the recovered water. This meets the requirements for use as quenching water in production processes, improves the efficiency of water resource recycling, and ensures the stable operation of the production process.

[0036] The outlet of the recycled water tank 27 is connected to the quenching water tank 14 via a pipeline. This achieves the recycling of water resources, allowing the treated recycled water to be reused in production as quenching water, reducing the consumption of fresh water and lowering production costs. At the same time, it reduces wastewater discharge, conforms to the concepts of clean production and sustainable development, and improves the environmental benefits of the entire production process.

[0037] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. An apparatus for producing alkyl-p-benzoquinone, comprising a reaction vessel, characterized in that: The inlet of the reactor is connected via pipes to a benzoquinone tank, an alkyl reagent tank, an AlCl3 catalyst tank, and a toluene solvent tank. The outlet of the reactor is connected via pipes to a settling tank. The outlet of the settling tank is connected via pipes to a vacuum distillation tank. The bottom outlet of the vacuum distillation tank is connected via pipes to a dissolving tank. The inlet of the dissolving tank is connected via pipes to an ethanol-water solvent tank. The outlet of the dissolving tank is connected via pipes to a recrystallization tank. The outlet of the recrystallization tank is connected via pipes to a first centrifuge. The solid phase outlet of the first centrifuge is connected via pipes to a first dryer. The outlet of the first dryer is connected via pipes to an alkyl-p-benzoquinone finished product tank.

2. The alkyl-p-benzoquinone production apparatus as described in claim 1, characterized in that: The inlet of the reactor is connected to a quenching water tank via a pipeline.

3. The alkyl-p-benzoquinone production apparatus as described in claim 1, characterized in that: The outlet of the settling tank is connected to a decolorizing tank via a pipe, the inlet of the decolorizing tank is connected to an activated carbon tank via a pipe, the outlet of the decolorizing tank is connected to a filter via a pipe, and the outlet of the filter is connected to the vacuum distillation tank via a pipe.

4. The alkyl-p-benzoquinone production apparatus according to claim 1, characterized in that: The top gas phase outlet of the vacuum distillation tank is connected to a toluene recovery tank via a pipeline, and the outlet of the toluene recovery tank is connected to the toluene solvent tank via a pipeline.

5. The alkyl-p-benzoquinone production apparatus as described in claim 1, characterized in that: The liquid phase outlet of the first centrifuge is connected to a mother liquor tank via a pipeline.

6. The alkyl-p-benzoquinone production apparatus according to claim 1, characterized in that: The outlet of the settling and stratification tank is connected to a regulating tank via a pipe. The inlet of the regulating tank is connected to a hydrochloric acid solution tank via a pipe. The outlet of the regulating tank is connected to a concentration crystallization tank via a pipe. The outlet of the concentration crystallization tank is connected to a second centrifuge via a pipe. The solid phase outlet of the second centrifuge is connected to a second dryer via a pipe. The outlet of the second dryer is connected to an AlCl3 crystal tank via a pipe.

7. An alkyl-p-benzoquinone production apparatus as described in claim 6, characterized in that: The liquid phase outlet of the second centrifuge is connected to an activated carbon adsorption tank via a pipeline, and the outlet of the activated carbon adsorption tank is connected to a recovery water tank via a pipeline.

8. An alkyl-p-benzoquinone production apparatus as described in claim 7, characterized in that: The outlet of the activated carbon adsorption tank is connected to an ion exchange resin column via a pipeline, and the outlet of the ion exchange resin column is connected to the recycled water tank via a pipeline.

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