Continuous production device for p-tert-butylphenol
By using a dual-discharge pipe and temperature control jacket design, the problems of catalyst adhesion and temperature fluctuation were solved, enabling continuous, stable and efficient production of p-tert-butylphenol, thus improving production efficiency and product quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZIBO XUJIA CHEM IND CO LTD
- Filing Date
- 2025-04-03
- Publication Date
- 2026-04-28
AI Technical Summary
Existing p-tert-butylphenol production units are prone to pipeline blockage due to catalyst adhesion during the unloading process, and the lack of effective insulation measures leads to material crystallization, affecting production efficiency and the smooth operation of the process.
The system is designed with a dual-discharge pipeline system, equipped with control valves and catalyst filters. Combined with a temperature control jacket, it achieves a dual-feed and dual-discharge mode, and utilizes waste heat to maintain temperature stability and prevent crystallization.
To ensure a continuous and stable unloading process, avoid production stoppages, improve production efficiency, enhance catalyst quality and energy utilization efficiency, and reduce energy consumption.
Smart Images
Figure CN224166915U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of p-tert-butylphenol production technology, specifically to a continuous p-tert-butylphenol production apparatus. Background Technology
[0002] p-tert-Butylphenol, as a key organic chemical raw material, is widely used in many fields. In the plastics industry, it can be used as an antioxidant to effectively improve the antioxidant properties of plastic products and extend their service life; in the rubber industry, it is an important vulcanizing agent and accelerator, which can significantly enhance the physical and mechanical properties of rubber products; in the coatings field, it helps to improve the film-forming properties and corrosion resistance of coatings; and in adhesives, it can greatly improve the bonding strength and stability of adhesives.
[0003] However, existing equipment for the production of p-tert-butylphenol has several problems. Firstly, during the unloading process, some catalyst in the catalyst mixing tank is damaged, and the suction generated during unloading causes this damaged catalyst to adhere to the pipeline holes. As the unloading time increases, the amount of attached catalyst gradually increases, initially slowing down the unloading speed, and eventually leading to incomplete unloading. In severe cases, this can cause pipeline blockage, forcing a production shutdown and significantly impacting production efficiency. Secondly, existing equipment lacks effective insulation measures for the catalyst mixing tank, making the liquid phase temperature inside easily affected by the environment. When the temperature drops to a certain level, crystallization occurs in the material, making unloading difficult and hindering the smooth progress of subsequent production processes. Utility Model Content
[0004] To address the shortcomings of the existing technology, the purpose of this invention is to provide a continuous production apparatus for p-tert-butylphenol. By setting up a primary discharge pipe and a secondary discharge pipe, and equipping them with control valves, a dual discharge mode is achieved. When one discharge pipe experiences unloading difficulties due to catalyst adhesion, the system can promptly switch to the other pipe, ensuring a continuous and stable discharge process. If a pipeline becomes blocked, both pipelines will simultaneously switch to feeding pipelines, utilizing the force of the material to flush away the catalyst adhering to the pores and preventing production stoppages due to discharge blockages, thus improving production efficiency.
[0005] This utility model is achieved using the following technical solution:
[0006] The continuous production apparatus for p-tert-butylphenol includes a tubular reactor, an intermediate tank, and a gasification tank. The intermediate tank is connected to a catalyst mixing tank via a feed pump. The catalyst mixing tank is connected to the tubular reactor via a discharge pump. The tubular reactor is connected to a distillation column via a pipeline and to a reverse filter via a pipeline. A primary discharge pipeline connects the catalyst mixing tank and the discharge pump. The feed pump is connected to the primary discharge pipeline via a primary feed pipeline.
[0007] The tubular reactor temperature control jacket can precisely regulate and maintain the reaction temperature, providing a stable reaction environment for the synthesis of p-tert-butylphenol, ensuring the reaction proceeds under optimal conditions, improving reaction selectivity and yield, and reducing the occurrence of side reactions. Simultaneously, the waste heat generated can be transferred to the catalyst mixing tank temperature control jacket via connecting pipelines, achieving secondary energy utilization.
[0008] The catalyst mixing tank and the discharge pump are connected by a secondary discharge pipeline, and the feed pump is connected to the secondary discharge pipeline through the secondary feed pipeline.
[0009] Control valves are installed on the primary discharge pipe, secondary discharge pipe, secondary feed pipe, and primary feed pipe. The catalyst filter effectively filters broken catalyst, ensuring the quality of the catalyst participating in the reaction; the inclined vibrating screen improves the filtration effect. The temperature control jacket utilizes the waste heat of the tubular reactor's temperature control jacket to maintain a stable temperature inside the tank, preventing material crystallization and ensuring smooth material discharge. The design of dual feed and dual discharge pipes and control valves enables flexible feeding and unloading operations, avoiding unloading blockage problems.
[0010] The intermediate tank is equipped with an intermediate tank heating jacket on its outside, and a catalyst filter is connected to the catalyst mixing tank. An inclined vibrating screen is installed inside the catalyst filter.
[0011] The tubular reactor is provided with a tubular reactor temperature control sleeve on its outside, and a temperature control oil inlet pipe is provided on the tubular reactor temperature control sleeve. The catalyst mixing tank is provided with a catalyst mixing tank temperature control sleeve on its outside, and the tubular reactor temperature control sleeve is connected to the catalyst mixing tank temperature control sleeve through a connecting pipe.
[0012] The distillation column is connected to a reboiler, and the reverse filter has a filter plate inside. Below the filter plate is a rotating scraper driven by a drive motor. The upper edge of the rotating scraper is tangent to the lower edge of the filter plate.
[0013] The reverse filter is provided with a liquid phase outlet on the outside, which is located above the filter plate. A backwashing pipe is connected above the reverse filter.
[0014] The connection between the tubular reactor and the reverse filter is located below the filter plate.
[0015] The working principle of this utility model is as follows:
[0016] The liquid feedstock is transferred to an intermediate tank, and the intermediate tank's heating jacket is opened to heat the feedstock to a suitable temperature. Simultaneously, the catalyst entering the catalyst mixing tank is filtered using an inclined vibrating screen in the catalyst filter to remove broken catalyst particles. The pretreated feedstock and catalyst are then pumped into the catalyst mixing tank in a specific ratio using a feed pump. The temperature control jacket of the catalyst mixing tank is opened, and the residual heat from the tubular reactor's temperature control jacket is used to heat the materials in the catalyst mixing tank to the required reaction temperature. During this process, the materials are thoroughly mixed within the tank, preparing for subsequent reactions.
[0017] The material enters a tubular reactor, where a temperature control jacket precisely regulates the reaction temperature. The material undergoes a chemical reaction to produce p-tert-butylphenol. After the reaction, the material exits the tubular reactor, with the product being directly piped to a distillation column, while the catalyst mixture enters a reverse filter. In the reverse filter, filter plates perform solid-liquid separation of the catalyst mixture, and a rotating scraper below continuously removes solid impurities from the filter plates to prevent clogging. The separated liquid phase is discharged from the liquid phase outlet and enters subsequent processing steps. The product entering the distillation column is purified by distillation under the heat provided by the reboiler.
[0018] During catalyst mixing tank unloading, under normal circumstances, one of the primary or secondary discharge pipes is responsible for unloading, while the other serves as a backup. When a decrease in discharge flow is detected, the control valve automatically switches to the other discharge pipe for unloading. If a discharge pipe becomes blocked, both discharge pipes can simultaneously switch to feeding mode, using the pressure of the material to flush away the catalyst adhering to the pipe openings, restoring pipe patency before unloading.
[0019] Compared with the prior art, the beneficial effects of this utility model are:
[0020] (1) By setting up a primary discharge pipe and a secondary discharge pipe and equipping them with control valves, a dual discharge mode is realized. When one of the discharge pipes is obstructed due to catalyst adhesion, it can be switched to the other pipe in time to ensure the continuous and stable discharge process. If the pipeline is blocked, both pipelines will be switched to feeding pipelines at the same time, and the force of the material will be used to flush away the catalyst that is stuck in the hole, avoiding production stoppage due to discharge blockage and improving production efficiency.
[0021] (2) Adding a catalyst filter and installing an inclined vibrating screen inside it can effectively filter out broken catalyst, reducing the possibility of it entering the catalyst mixing tank, ensuring the quality of the catalyst participating in the reaction, thereby improving the reaction effect and product quality. Connecting the temperature control jacket of the tubular reactor to the temperature control jacket of the catalyst mixing tank through connecting pipes allows the waste heat of the temperature control jacket of the tubular reactor to be used for the temperature control jacket of the catalyst mixing tank, realizing the cascade utilization of energy, reducing energy consumption, improving energy utilization efficiency, and reducing production costs. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the continuous production apparatus for p-tert-butylphenol according to this utility model;
[0023] In the diagram: 1. Tubular reactor; 2. Intermediate tank; 3. Gasification tank; 4. Catalyst mixing tank; 5. Distillation column; 6. Reverse filter; 7. Intermediate tank heating jacket; 8. Catalyst filter; 9. Inclined vibrating screen; 10. Primary discharge pipe; 11. Secondary discharge pipe; 12. Secondary feed pipe; 13. Primary feed pipe; 14. Feed pump; 15. Discharge pump; 16. Tubular reactor temperature control jacket; 17. Catalyst mixing tank temperature control jacket; 18. Connecting pipe; 19. Temperature-controlled oil inlet pipe; 20. Reboiler; 21. Filter plate; 22. Liquid phase outlet; 23. Rotary scraper. Detailed Implementation
[0024] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0025] Example 1
[0026] like Figure 1As shown, the continuous production unit for p-tert-butylphenol includes a tubular reactor 1, an intermediate tank 2, and a gasification tank 3. The intermediate tank 2 is connected to a catalyst mixing tank 4 via a feed pump 14. The catalyst mixing tank 4 is connected to the tubular reactor 1 via a discharge pump 15. The tubular reactor 1 is connected to a distillation column 5 and a reverse filter 6 via pipelines. A primary discharge pipeline 10 connects the catalyst mixing tank 4 and the discharge pump 15. The feed pump 14 is connected to the primary discharge pipeline 10 via a primary feed pipeline 13. A secondary discharge pipeline 11 connects the catalyst mixing tank 4 and the discharge pump 15. The feed pump 14 is connected to the secondary discharge pipeline 11 via a secondary feed pipeline 12. Control valves are installed on the primary discharge pipeline 10, the secondary discharge pipeline 11, the secondary feed pipeline 12, and the primary feed pipeline 13. The control valves can flexibly adjust the flow rate and direction of materials in the pipeline, achieving precise control in dual-feed and dual-discharge modes, such as switching between feed and discharge pipelines, and flushing materials when the pipeline is blocked, ensuring smooth production and improving production flexibility and reliability. An intermediate tank heating jacket 7 is installed on the outside of the intermediate tank 2. A catalyst filter 8 is connected to the catalyst mixing tank 4, and an inclined vibrating screen 9 is installed inside the catalyst filter 8. A tubular reactor temperature control jacket 16 is installed on the outside of the tubular reactor temperature control jacket 16, with a temperature control oil inlet pipe 19 on it. A catalyst mixing tank temperature control jacket 17 is installed on the outside of the catalyst mixing tank 4, and the tubular reactor temperature control jacket 16 is connected to the catalyst mixing tank temperature control jacket 17 via a connecting pipe 18. A reboiler 20 is connected to the distillation column 5. A filter plate 21 is installed inside the reverse filter 6, and a rotating scraper 23 driven by a drive motor is located below the filter plate 21. A liquid phase outlet 22 is provided on the outside of the reverse filter 6, located above the filter plate 21. A backwashing pipe is connected to the top of the reverse filter 6. The connection between the tubular reactor 1 and the reverse filter 6 is located below the filter plate 21.
[0027] The above-mentioned continuous production apparatus for p-tert-butylphenol includes the following steps during operation:
[0028] (1) The liquid raw material is transported to the intermediate tank 2, and the intermediate tank heating jacket 7 is turned on to heat the raw material to a suitable temperature. At the same time, the catalyst entering the catalyst mixing tank 4 is filtered, and the broken catalyst particles are removed by using the inclined vibrating screen 9 in the catalyst filter 8. The pretreated raw material and catalyst are transported to the catalyst mixing tank 4 in a certain proportion by the feed pump 14. The temperature control jacket 17 of the catalyst mixing tank is turned on, and the residual heat of the temperature control jacket 16 of the tubular reactor is used to heat the material in the catalyst mixing tank 4 to the temperature required for the reaction. During this process, the material is fully mixed in the tank to prepare for the subsequent reaction. (2) The material enters the tubular reactor 1, and the temperature control jacket 16 of the tubular reactor precisely controls the reaction temperature. The material undergoes a chemical reaction to generate p-tert-butylphenol. After the reaction is completed, the material in the tubular reactor 1 is discharged, and the product is directly transported to the distillation column 5 through the pipeline, while the catalyst mixture enters the reverse filter 6. In the reverse filter 6, the filter plate 21 performs solid-liquid separation on the catalyst mixture, and the rotating scraper 23 below continuously scrapes off solid impurities on the filter plate 21 to prevent clogging. The separated liquid phase is discharged from the liquid phase outlet 22 and enters the subsequent processing flow. The product entering the distillation column 5 is purified by distillation under the heat provided by the reboiler 20. (3) When unloading from the catalyst mixing tank 4, under normal circumstances, one of the primary discharge pipe 10 or the secondary discharge pipe 11 is responsible for unloading, and the other can be used as a backup. When a decrease in discharge flow is detected, the control valve automatically switches to the other discharge pipe for unloading. If a discharge pipe is blocked, both discharge pipes can be switched to the feeding mode at the same time, and the pressure of the material is used to flush away the catalyst attached to the pipe holes, and the unloading operation is carried out after the pipe is unblocked.
Claims
1. A continuous production apparatus for p-tert-butylphenol, characterized in that, The system includes a tubular reactor (1), an intermediate tank (2), and a gasification tank (3). The intermediate tank (2) is connected to the catalyst mixing tank (4) via a feed pump (14). The catalyst mixing tank (4) is connected to the tubular reactor (1) via a discharge pump (15). The tubular reactor (1) is connected to the distillation column (5) via a pipeline. The tubular reactor (1) is connected to the reverse filter (6) via a pipeline. A primary discharge pipeline (10) connects the catalyst mixing tank (4) and the discharge pump (15). The feed pump (14) is connected to the primary discharge pipeline (10) via a primary feed pipeline (13).
2. The continuous production apparatus for p-tert-butylphenol according to claim 1, characterized in that, The catalyst mixing tank (4) is connected to the discharge pump (15) by a secondary discharge pipe (11), and the feed pump (14) is connected to the secondary discharge pipe (11) through the secondary feed pipe (12).
3. The continuous production apparatus for p-tert-butylphenol according to claim 2, characterized in that, Control valves are provided on the primary discharge pipe (10), secondary discharge pipe (11), secondary feed pipe (12) and primary feed pipe (13).
4. The continuous production apparatus for p-tert-butylphenol according to claim 1, characterized in that, The intermediate tank (2) is provided with an intermediate tank heating jacket (7) on the outside, and a catalyst filter (8) is connected to the catalyst mixing tank (4). An inclined vibrating screen (9) is provided inside the catalyst filter (8).
5. The continuous production apparatus for p-tert-butylphenol according to claim 1, characterized in that, The tubular reactor (1) is provided with a tubular reactor temperature control sleeve (16) on the outside, and a temperature control oil inlet pipe (19) is provided on the tubular reactor temperature control sleeve (16). The catalyst mixing tank (4) is provided with a catalyst mixing tank temperature control sleeve (17) on the outside. The tubular reactor temperature control sleeve (16) is connected to the catalyst mixing tank temperature control sleeve (17) through a connecting pipe (18).
6. The continuous production apparatus for p-tert-butylphenol according to claim 1, characterized in that, The distillation column (5) is connected to a reboiler (20), and the reverse filter (6) is equipped with a filter plate (21) inside. A rotating scraper (23) driven by a drive motor is provided below the filter plate (21).
7. The continuous production apparatus for p-tert-butylphenol according to claim 6, characterized in that, The reverse filter (6) is provided with a liquid phase outlet (22) on the outside, which is located above the filter plate (21). A backwashing pipe is connected above the reverse filter (6).
8. The continuous production apparatus for p-tert-butylphenol according to claim 6, characterized in that, The connection between the tubular reactor (1) and the reverse filter (6) is located below the filter plate (21).