Continuous closed-loop reaction production process for producing pigment violet 23

Abstract

The invention provides a closed-loop reaction continuous production process for producing pigment violet 23, which comprises the following steps: a) adding an NMP (N-Methyl Pyrrolidone) solvent into a 100L reaction kettle, starting and stirring to 30 DEG C, adding a reduzate, and stirring for 30 minutes; b) adding sodium carbonate after the step a), and continuously stirring for 30 minutes; c) slowly adding chloranil, keeping the temperature at 35-40 DEG C, and continuously reacting until the reaction is finished; d) transferring the material in the step c) to closed-loop reaction equipment, and controlling the feeding sequence, mode and complete reaction of each component by utilizing a multi-component reaction optimization technology to ensure the reaction of reactants and reduce the generation e of side reaction to the maximum extent; the adding sequence, the reaction environment, the pressure and the flow speed of reactants are accurately controlled in the reaction process, and the high yield and the high purity of the pigment purple 23 are guaranteed; f) continuously carrying out catalytic oxidation reaction in the closed loop by using a static mixer and a small amount of catalyst combination to obtain a product; by optimizing the continuous production process of the closed-loop reaction of the pigment violet 23, adopting a closed-loop reaction system, and performing continuous production and flow marking monitoring and control, the method disclosed by the invention achieves obvious good effects in a plurality of aspects; the production efficiency is improved, the product quality is guaranteed, the production cost is reduced, the environmental friendliness is improved, and the process stability is enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of pigment production, and in particular to a continuous production process for a closed-loop reaction for producing Pigment Violet 23. Background Art

[0002] Pigment Violet 23 (PV23) is an important organic pigment widely used in coatings, inks, plastics and textiles. With the increasing demand for high-quality pigments in industrial production, traditional batch reaction methods are lacking in terms of reaction efficiency, product quality, resource utilization and environmental impact. Therefore, improving the production process of Pigment Violet 23 and developing more efficient, green and sustainable production methods have become an important research direction in the current field of chemical manufacturing.

[0003] Limitations of traditional batch production process: Traditional batch production methods rely on large-scale reactors for reaction, which takes a long time, and the reaction process is difficult to accurately control. There are baseline side reactions and incomplete reactions, resulting in low yields. Since the reaction conditions (such as temperature, pressure, reactant concentration, etc.) are difficult to control uniformly throughout the reaction process, it is easy to cause uneven reaction rates and fluctuations, thereby affecting the yield and purity of candle violet 23. The large amount of solvents, catalysts and other chemicals used in traditional processes can easily cause waste of raw materials and environmental pollution, especially after the reaction, making it difficult to recover and treat the solvents, increasing production costs and environmental burdens. With the urgent requirements of environmental protection laws and regulations, higher requirements are put forward for the greenness and environmental protection of chemical production processes. Harmful solvents and catalysts are often used in the traditional production process of pigment violet 23, which does not conform to the principles of green chemistry, especially the waste gas, wastewater and solid emissions generated during the reaction process require additional treatment, which increases the environmental burden of enterprises. With the expansion of industrial scale, the control of production costs will inevitably become the key to the survival and development of enterprises. Improving the utilization efficiency of raw materials, energy and equipment, reducing emissions and reducing production costs have become key and important goals for the development of the chemical industry.

[0004] The purity and yield of Violet 23 directly affect its market competitiveness. Traditional batch processes are difficult to achieve precise control throughout the reaction process, resulting in low raw material utilization and by-products. Improving the purity and yield of Pigment Violet 23 has become the key to increasing product added value and market share.

[0005] Control of efficient catalytic oxidation reaction: The production of Pigment Violet 23 involves catalytic oxidation reaction, which is affected by multiple factors such as temperature, pressure, oxygen concentration, etc. In the traditional reaction process, the reaction conditions are often unstable and the catalyst utilization rate is low, resulting in long and incomplete reaction time. New technologies are needed to improve the reaction efficiency.

[0006] The goal of this project is to significantly improve production efficiency, reduce pigments, reduce environmental pollution, optimize resource utilization, and improve the standardization and automation of the production process on the basis of ensuring the quality and purity of Pigment Violet 23 products by introducing closed-loop reaction systems, continuous production processes and customized control technologies, so as to meet the market demand for high-quality pigments and promote the green and sustainable development of the Pigment Violet 23 production process.

[0007] The research and development of the closed-loop reaction system and continuous production process of this project can not only solve the deficiencies in the existing process, but also achieve the optimization and sustainable development of the production process by introducing customized control technology. Summary of the invention

[0008] The present invention provides a continuous production process for a ring-closing reaction for producing Pigment Violet 23, aiming to solve the problems raised by the above background technology.

[0009] The present invention is achieved in that the process comprises the following steps:

[0010] a) Add NMP solvent to a 100L reactor, start and stir to 30°C, add reducing agent, and stir for 30 minutes;

[0011] b) adding soda ash after step a) and continuing stirring for 30 minutes;

[0012] c) slowly adding chloranil and maintaining the temperature at 35-40° C., and continuing the reaction until the reaction is complete;

[0013] d) Transfer the materials in step c) to the closed-loop reaction equipment, and use multi-component reaction optimization technology to control the order, method and complete reaction of each component to ensure the reaction of the reactants and minimize the generation of side reactions

[0014] e;) accurately controlling the order of reactant addition, reaction environment, pressure and flow rate during the reaction to ensure high yield and high purity of pigment violet 23;

[0015] f) Using a static mixer and a small amount of catalyst combination, the catalytic oxidation reaction is continuously carried out in a closed loop to obtain the product

[0016] Preferably, the order of addition is: at the beginning of the reaction, first ensure the optimal concentration of reactants in the reaction system; add chloranil in proportion, and keep the reaction rate stable by temperature adjustment; the reaction rate, add the catalyst in time according to the reaction rate to improve the selectivity and conversion rate of the reaction.

[0017] Preferably, the closed-loop reaction equipment includes: a closed-loop reactor with a feeding system, a heating / cooling system, a stirring device and a monitoring sensor; a real-time monitoring system that can accurately monitor the concentration, temperature and pressure of the reactants and adjust the reaction conditions through a feedback regulation system; the system is also equipped with a static mixer and a gas circulation system to ensure that the reactants are fully in contact with the air and enhance the reaction rate.

[0018] Preferably, the reaction process is adjusted in real time through an optimized machine learning algorithm and reaction kinetics model to automatically optimize the reaction temperature, pressure, catalyst concentration, and the speed and order of reactant addition.

[0019] Preferably, the catalyst is a combination of copper sulfate and anthraquinone, which can play a catalytic oxidation role in the reaction process, increase the generation rate of Pigment Violet 23 and ensure the selectivity of the reaction.

[0020] Preferably, the solvent used in the reaction is NMP, o-dichlorobenzene or chlorobenzene, which can stably dissolve the reactants at high temperatures and does not participate in side reactions.

[0021] Preferably, the closed-loop reaction equipment includes a high-efficiency filtering and drying device, which can improve the purity of fluorescent violet 23 after the reaction is completed.

[0022] Preferably, the process achieves automatic regulation of the entire reaction process through real-time feedback control system and reaction kinetic model optimization, reduces manual intervention, and improves reaction efficiency and stability.

[0023] Preferably, the real-time data during the reaction process is stored and analyzed via a cloud platform to support remote management.

[0024] A continuous production device for the closed-loop reaction of Pigment Violet 23, comprising:

[0025] a) a feeding system for adding reactants;

[0026] b) Reactor, heating / cooling system, stirring device and reaction monitoring sensor;

[0027] c) static mixer and catalyst addition system for catalytic oxidation during the reaction process;

[0028] d) Real-time monitoring system and automatic feedback adjustment system;

[0029] e) Filtration and drying equipment for product separation and purification.

[0030] Due to the adoption of the above scheme, the beneficial effects of the present invention are: by optimizing the continuous production process of the closed-loop reaction of Pigment Violet 23, adopting a closed-loop reaction system, continuous production, and process marking monitoring and control, the present application has achieved remarkable good results in many aspects, mainly reflected in improving production efficiency, ensuring product quality, reducing production costs, improving environmental friendliness, and enhancing process stability.

[0031] Continuous production: Through the continuous reaction system, the shortcomings of long reaction cycle and uneven reaction in traditional batch production are avoided, and the reaction efficiency and production speed are significantly improved. Continuous reaction can provide stable reaction conditions, reduce reaction time, and thus increase output.

[0032] Optimize reaction control: Real-time monitoring of key parameters such as temperature, pressure, flow rate, etc. during the reaction process, and automatic adjustment based on feedback to ensure that the reaction is carried out in the most optimized state, thereby increasing the reaction speed, shortening the production cycle, and increasing the operating efficiency of the production line.

[0033] Precise control of reaction conditions: Through a closed-loop control system, the concentration, temperature, pressure and other reaction conditions of the reactants are precisely adjusted to ensure that the reactants react fully under the optimal state, reduce the occurrence of side reactions, and improve the purity of Pigment Violet 23.

[0034] The marker monitoring and feedback control system for reducing the generation of by-products can timely detect the early data of by-product generation, and automatically adjust the reaction conditions according to the real-time reaction, effectively inhibiting side reactions and ensuring the high yield and high purity of Purple 23.

[0035] Reduced energy consumption: The temperature, gas flow rate and catalyst usage during the reaction process can be optimized and adjusted through the automated control system, thereby reducing the energy consumption during the reaction process. For example, the optimal control of reaction temperature and reactant concentration reduces overheating and unnecessary energy waste.

[0036] Improve the flow rate of raw materials: By accurately controlling the dosage and acceleration rate of reactants, over-dosing or waste of reactants is avoided. The closed-loop control system can automatically adjust the flow rate and concentration of reactants based on real-time feedback to improve the flow efficiency of raw materials.

[0037] Reduce losses and by-products: Real-time optimization of the reaction process can minimize the generation of unreacted products and by-products, thereby reducing losses and by-product disposal costs and lowering the environmental cost of overall production.

[0038] Reduce production fluctuations: The automated monitoring system can track changes in reaction parameters in real time and automatically adjust control parameters according to the actual state of the reaction, reducing fluctuations in the reaction process and making the quality of each batch of products more consistent.

[0039] Improve batch consistency: The closed-loop reaction system avoids quality fluctuations between different batches in traditional batch production due to improper operation or reaction conditions through precise control and real-time adjustment, ensuring that the quality of each batch of products is highly consistent.

[0040] Automated control system: By introducing automated monitoring and control systems, the production process has achieved a high degree of automation, reducing reliance on manual operations. The system can automatically adjust according to real-time data during the reaction process, reducing the risk of human error.

[0041] Enhance process stability: The automated control system can adjust the reaction process in a timely manner based on the sensor data to avoid unstable conditional reactions caused by lags or deviations in human operations, thereby ensuring the stability and reliability of the production process.

[0042] Reducing harmful gas emissions: By precisely controlling factors such as reactant concentration and oxygen supply, incomplete reactions and the generation of by-products during the reaction process are reduced, thereby reducing the emission of harmful gases and waste liquids, meeting the requirements of modern green chemical production.

[0043] Energy-saving goals: Automated control systems can optimize energy use, reduce energy waste, reduce electricity and heat consumption during the production process, and promote the realization of energy-saving goals.

[0044] Green production: By adopting green solvents, reducing solvent usage and improving catalyst utilization, the burden on the environment in traditional production processes is reduced and the environmental friendliness of the production process is improved.

[0045] Big data analysis and optimization: All data during the reaction process can be collected in real time and evaluated through big data analysis. The system can continuously learn and optimize conditional reactions to improve the overall efficiency and accuracy of the production process.

[0046] Fault warning and self-adjustment: The intelligent system can monitor the equipment status and reaction conditions in real time. Once an abnormal situation occurs (such as abnormal temperature, too high or too low pressure, etc.), the system will automatically adjust or issue an alarm to ensure production continuity and equipment safety.

[0047] Continuous process improvement: Through continuous monitoring and feedback of data, the system can continuously optimize reaction conditions, provide data support for process improvement and upgrading, and further improve production stability and efficiency.

[0048] High-quality pigment products: Through precise reaction control and efficient production technology, we can provide high-quality Pigment Violet 23 to meet the market demand for high-brightness and high-color fastness pigments, and enhance the competitiveness of products in the market. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0050] A continuous production process for a closed-loop reaction for producing Pigment Violet 23, the process comprising the following steps:

[0051] a) Add NMP solvent to a 100L reactor, start and stir to 30°C, add reducing agent, and stir for 30 minutes;

[0052] b) adding soda ash after step a) and continuing stirring for 30 minutes;

[0053] c) slowly adding chloranil and maintaining the temperature at 35-40° C., and continuing the reaction until the reaction is complete;

[0054] d) Transfer the materials in step c) to the closed-loop reaction equipment, and use multi-component reaction optimization technology to control the order, method and complete reaction of each component to ensure the reaction of the reactants and minimize the generation of side reactions

[0055] e;) accurately controlling the order of reactant addition, reaction environment, pressure and flow rate during the reaction to ensure high yield and high purity of pigment violet 23;

[0056] f) Using a static mixer and a small number of catalyst combinations, a catalytic oxidation reaction is continuously carried out in a closed loop to obtain a product. The order of addition is: at the beginning of the reaction, first ensure the optimal concentration of the reactants in the reaction system; add tetrachlorobenzoquinone in proportion, and keep the reaction rate stable by temperature regulation; reaction rate, add catalyst in time according to the reaction rate to improve the selectivity and conversion rate of the reaction. The closed-loop reaction equipment includes: a closed-loop reactor with a feeding system, a heating / cooling system, a stirring device and a monitoring sensor; a real-time monitoring system that can accurately monitor the concentration, temperature and pressure of the reactants, and adjust the reaction conditions through a feedback regulation system; a static mixer and a gas circulation system are also configured in the system to ensure that the reactants are fully in contact with the air and enhance the reaction rate. The reaction process is adjusted in real time by an optimized machine learning algorithm and a reaction kinetic model, and the reaction temperature, pressure, catalyst concentration, and the throwing speed and order of the reactants are automatically optimized. The catalyst is a combination of copper sulfate and anthraquinone, which can play a catalytic oxidation role in the reaction process, increase the generation rate of pigment violet 23 and ensure the selectivity of the reaction. The solvent used in the reaction is NMP, o-dichlorobenzene or chlorobenzene, which can stably dissolve the reactants at high temperatures and does not participate in side reactions. The closed-loop reaction equipment includes a high-efficiency filtration and drying device, which can improve the purity of fluorescent violet 23 after the reaction is completed. The process is optimized by a real-time feedback control system and a reaction kinetic model, which realizes automatic adjustment of the entire reaction process, reduces manual intervention, and improves reaction efficiency and stability. Real-time data during the reaction process is stored and analyzed through a cloud platform to support remote management.

[0057] A continuous production device for the closed-loop reaction of Pigment Violet 23, comprising:

[0058] a) a feeding system for adding reactants;

[0059] b) Reactor, heating / cooling system, stirring device and reaction monitoring sensor;

[0060] c) static mixer and catalyst addition system for catalytic oxidation during the reaction process;

[0061] d) Real-time monitoring system and automatic feedback adjustment system;

[0062] e) Filtration and drying equipment for product separation and purification. Specific implementation 1:

[0064] 1. Preparation of raw materials and reaction system

[0065] Reactor selection and configuration:

[0066] A 100L stainless steel reactor was used, equipped with a high-efficiency stirrer, temperature sensor, pressure sensor, pH sensor, flow meter and other real-time monitoring equipment. 60kg of N-methyl-2-pyrrolidone (NMP) was added to the reactor as a solvent, and the stirring system was started to a minimum of 30°C.

[0067] Reactant addition:

[0068] Add the reducing material (6 kg) to the reactor in a predetermined order and rate of addition, and stir for 30 minutes; then add 2.5 kg of soda ash, and continue stirring for 30 minutes to ensure that the reactants are fully mixed. At this time, the temperature is continuously controlled at 30°C to allow the reducing material and alkali in the reactants to react fully.

[0069] Chloranil dosage and control:

[0070] Slowly add 4.5 kg of chloranil, and keep the reaction temperature at 35-40 ° C. The reaction continues until the end of the reaction, and the degree of consumption of the reducing substances in the reactants is detected in real time to determine whether the reaction is complete. At this time, the addition rate is controlled by using data feedback and reaction kinetics model to avoid adding reactants too early or too late.

[0071] 2. Closed-loop response process

[0072] Discharge transfer and closed loop reaction:

[0073] After the initial reaction is completed, the discharge in the reactor is transferred to a 100L closed-loop reactor. The reactor is equipped with a static mixer, a gas circulation system and a reaction control device. The feed pressure is adjusted to about 0.3MPa through an external pump system, and the air compression pump is started to adjust the air pressure to 0.5MPa.

[0074] Catalyst addition and temperature control:

[0075] While the reactants were transferred to the closed-loop reactor, 25 g of copper sulfate and 25 g of anthraquinone were added as catalysts. The reaction temperature was adjusted to 150° C. by a heating system, and the air pressure was adjusted by an air compressor pump to ensure that the oxygen concentration was maintained within 1% to avoid the occurrence of side reactions.

[0076] Reaction pipeline and reactor optimization:

[0077] During the reaction, a static mixer (such as Kenics type, SMX type, etc.) is used to ensure that the reactants are fully contacted with the air and the oxidation reaction efficiency is improved. The supply flows in a 10-60 meter reaction pipeline, and the reaction supply continues to enter the closed-loop reactor through the pipeline for secondary catalytic oxidation reaction.

[0078] Real-time control and feedback regulation:

[0079] Through the integrated real-time feedback control system, key parameters such as temperature, pressure, gas flow, reactant concentration, etc. are continuously monitored and automatically adjusted through intelligent algorithms. If the reaction temperature, pressure or oxygen concentration deviates, the system will automatically adjust the heating / cooling, gas flow or feed rate.

[0080] 3. Reaction completion and post-processing

[0081] Filtering vs. Filtering:

[0082] After the reaction process is cooled, the heating system is turned off and the reactants are cooled to 100°C. Subsequently, the solid device in the reactants is separated by an automatic filtration system to ensure the purity of fluorescent violet 23. The water collection device after filtration is removed by a drying device to remove more than ten solvents, and then washed with warm water to neutrality and dried again.

[0083] Drying and finished product output:

[0084] Finally, the product is dried by a hot air drying device to ensure that the quality of the final Pigment Violet 23 meets the standards. Specific implementation 2:

[0086] 1. Application of efficient solvent and catalyst combination

[0087] Solvent selection and reaction environment:

[0088] Before the reaction, o-dichlorobenzene or chlorobenzene solvent is used to replace NMP to improve the solubility and reaction rate of the reactants at high temperature. The choice of solvent is verified by multiple experiments to ensure that the yield of Pigment Violet 23 can be improved under different reaction conditions.

[0089] Catalyst Optimization and Multicomponent Reactions:

[0090] In terms of catalyst selection, not only is a combination of copper sulfate and anthraquinone used, but the amount and method of adding the catalyst are also dynamically adjusted according to the progress of the reaction. The reaction rate and degree of oxidation in the purple fluorescence 23 are detected by real-time sensors, and the catalyst addition is automatically adjusted.

[0091] Dynamic optimization of reaction conditions:

[0092] The temperature, pressure, and reactant concentration during the reaction process are monitored in real time by sensors and optimized with machine learning algorithms. After each reaction, the system evaluates the reaction conditions and optimizes the reaction model through incremental learning to improve the effect of the next batch of reactions.

[0093] 2. Reaction pipeline and intelligent control

[0094] Pipeline Response Optimization:

[0095] When the reaction supply flows from the reactor into the reaction pipeline, precise flow control devices and adjustment systems are used to ensure that each reaction stage has enough residence time in the pipeline for complete reaction. Parameters such as temperature and pressure in the pipeline are finely adjusted through real-time monitoring and feedback adjustment systems.

[0096] Automatic control system:

[0097] The reaction device is equipped with an automated control system that can automatically adjust various reaction parameters (such as reaction temperature, flow rate, oxygen concentration, etc.) according to the reaction progress and sensor data. The machine learning model analyzes historical data and performs real-time optimization to ensure that each stage of the reaction process is in the best condition.

[0098] Energy saving and responsiveness:

[0099] By optimizing the reaction time, temperature and flow rate, unnecessary energy consumption can be reduced. At the same time, the flow rate of oxygen in the process is controlled to improve the efficiency of energy utilization by avoiding excessive consumption of oxygen during the reaction.

[0100] 3. Confirmation of reaction endpoint and output of high-purity products

[0101] Confirmation of reaction endpoint:

[0102] The confirmation of the reaction endpoint depends on the concentration change of the reactants, and the generation of fluorescent violet 23 during the reaction is monitored in real time by an online analysis device. Once the generated fluorescent violet 23 reaches the predetermined predicted amount, the system automatically triggers the end of the reaction and starts the post-processing procedure.

[0103] Limits and Automation:

[0104] Throughout the production process, the limit of Pigment Violet 23 is guaranteed by efficient filtering and drying devices. In addition, the production automation system with no human intervention during the production process minimizes the risk of human error and improves production efficiency.

[0105] Implementation 3:

[0106] 1. Multi-stage response and dynamic adjustment

[0107] Reaction stage control:

[0108] This implementation method adopts multi-stage addition and reaction control. In the initial stage, the reaction is accelerated to ensure that the reducing product and the soda ash react fully; in the middle stage, a catalyst is added and the temperature is adjusted to prevent side reactions; in the later stage, benzoquinone is added according to the progress stage of the reaction to avoid the formation of by-products.

[0109] Automatic adjustment of dosing sequence:

[0110] During the reaction process, based on real-time data and feedback control, the system will automatically adjust the order and rate of addition of each reactant according to the real-time monitoring data to ensure that the radiator components participate in the reaction at the best time and optimal concentration.

[0111] Intelligent monitoring and automatic adjustment:

[0112] Implement AI and machine learning algorithms to monitor every parameter in the reaction in real time, such as temperature, pressure, flow, etc. Based on these data, the reaction parameters are automatically adjusted to ensure that the reactants are completed under optimal conditions.

[0113] 2. Reactant monitoring and feedback control

[0114] During the reaction process, multiple sensors monitor key parameters such as temperature, pressure, and concentration, and the data is transmitted to the central control system through the industrial Internet of Things. Combining big data analysis with machine learning models, the system can adjust the reaction conditions in real time to ensure the stability and optimization of the reaction.

[0115] Real-time feedback and intelligent optimization:

[0116] Based on real-time data, the system adjusts reaction conditions through automated control devices and automatically evaluates reaction results after each reaction, further optimizing reaction parameters and gradually improving reaction efficiency and product quality.

[0117] In the above embodiments, reactant monitoring and feedback control play a key role in the closed-loop reaction continuous production process of Pigment Violet 23, which can bring many benefits, such as improving production efficiency, ensuring product quality, reducing ink and reducing manual intervention.

[0118] Real-time optimization of reaction conditions: The reactant monitoring and feedback control system can automatically adjust the reaction conditions (such as temperature, catalyst concentration, gas flow rate, etc.) by real-time monitoring of key parameters in the reaction (such as temperature, pressure, concentration, gas flow rate, etc.), so that the reaction is carried out under the most optimized conditions. This helps to reduce reaction time, increase reaction speed, and thus improve overall production efficiency.

[0119] Rapid response to reaction fluctuations: Reaction conditions may fluctuate due to factors such as the characteristics of the reactants and the condition of the equipment. Real-time feedback control systems can quickly respond to these changes and adjust the reaction process in a timely manner to avoid slow or incomplete reactions and improve the completeness and stability of the reaction.

[0120] Precise control of reactant concentration: reactant concentration is one of the key factors affecting the product quality of Pigment Violet 23. By online monitoring of reactant concentration and comparing it with the preset reaction conditions, the system can dynamically adjust the injection rate and reaction parameters to ensure that the concentration of the optimal reactant is always kept within the range, thereby ensuring high purity and high yield of the product.

[0121] Reduce by-product generation: Real-time monitoring can promptly detect the generation of by-products (for example, side reactions caused by excessive reaction temperature or excessive oxygen concentration) and immediately adjust the reaction through the feedback system, thereby reducing side reactions and avoiding negative impacts on product quality.

[0122] Optimize resource usage: During the reaction process, the optimal regulation of temperature, pressure and gas flow can avoid waste such as overheating, excessive addition of catalysts and oxidation. This can not only save energy, but also reduce the waste of reactants and solvents and improve utilization.

[0123] Improve reaction selectivity: Reactant monitoring and feedback control can make the reaction process more precise, thereby improving reaction selectivity, reducing unnecessary side reactions and ineffective reactions, and further reducing reaction and raw material waste.

[0124] Reduce manual intervention: Through real-time monitoring and automatic adjustment of the feedback control system, the production process can be highly automated and automatic. The system can adjust the reaction parameters according to real-time data, avoiding errors and delays that may be introduced by manual adjustments, and reducing the relative risks of manual intervention operations.

[0125] Fault warning and safety assurance: The monitoring system can promptly detect abnormal conditions in the reaction equipment, such as overtemperature, pressure failure or abnormal solvent concentration, and prompt operators to intervene through automatic alarm prompts, thereby avoiding equipment damage, production waste and even safety accidents.

[0126] Accurate reactant dosing: Real-time monitoring and feedback control systems can accurately control the amount of reactants added and the acceleration rate of addition. This can avoid incomplete reactions or unstable intermediates caused by improper dosing, thereby improving product consistency.

[0127] Avoid batch-to-batch fluctuations: Since reaction conditions can be finely adjusted based on real-time feedback, each parameter in the reaction process is strictly controlled, which greatly reduces the difference between batches, improves production stability, and ensures that each batch of products meets the standards.

[0128] Data-driven optimization: The production data generated by the real-time monitoring system can provide a reference for process improvement and optimization. By analyzing historical data, the system can find potential optimization space, such as adjustments in reaction time, temperature and catalyst use, so as to continuously improve the process.

[0129] Flexible adjustment of production plans: Real-time monitoring not only helps to adjust the production process in a timely manner, but also enables flexible adjustment of production plans in long-term production according to multiple factors such as raw material conditions and equipment conditions, thereby improving the utilization rate of production resources.

[0130] Process data recording: All monitoring data (temperature, pressure, gas concentration, reactant concentration, etc.) during the reaction process are recorded in real time, which can provide a detailed historical record of the production process. These data not only help to trace the production process of the product, but also provide a basis for quality control and compliance inspection.

[0131] Meeting regulatory requirements: In some industries, the production process of products needs to meet strict quality control standards and regulatory requirements. Through reactant monitoring and feedback control systems, it can be ensured that each stage of the production process meets compliance requirements and that corresponding production data can be provided at any time.

[0132] The above description of the embodiments is to facilitate the understanding and use of the present invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments. Improvements and modifications made by those skilled in the art based on the principles of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous production process for the closed-loop reaction of Pigment Violet 23, characterized in that: The process comprises the following steps: a) Add NMP solvent to a 100L reactor, start and stir to 30°C, add reducing agent, and stir for 30 minutes; b) adding soda ash after step a) and continuing stirring for 30 minutes; c) slowly adding chloranil and maintaining the temperature at 35-40° C., and continuing the reaction until the reaction is complete; d) Transfer the materials in step c) to the closed-loop reaction equipment, and use multi-component reaction optimization technology to control the order, method and complete reaction of each component to ensure the reaction of the reactants and minimize the generation of side reactions e;) accurately controlling the order of reactant addition, reaction environment, pressure and flow rate during the reaction to ensure high yield and high purity of pigment violet 23; f) Using a static mixer and a small amount of catalyst combination, the catalytic oxidation reaction is continuously carried out in a closed loop to obtain a product.

2. A continuous production process for the closed-loop reaction of Pigment Violet 23 according to claim 1, characterized in that: The addition sequence is: at the beginning of the reaction, first ensure the optimal concentration of the reactants in the reaction system; add chloranil in proportion and keep the reaction rate stable by adjusting the temperature; according to the reaction rate, add the catalyst in time to improve the selectivity and conversion rate of the reaction.

3. A continuous production process for the closed-loop reaction of Pigment Violet 23 according to claim 2, characterized in that: The closed-loop reaction equipment includes: a closed-loop reactor with a feeding system, a heating / cooling system, a stirring device and a monitoring sensor; a real-time monitoring system that can accurately monitor the concentration, temperature and pressure of the reactants and adjust the reaction conditions through a feedback regulation system; the system is also equipped with a static mixer and a gas circulation system to ensure that the reactants are fully in contact with the air and enhance the reaction speed.

4. A continuous production process for the closed-loop reaction of Pigment Violet 23 according to claim 3, characterized in that: The reaction process is adjusted in real time through an optimized machine learning algorithm and reaction kinetics model to automatically optimize the reaction temperature, pressure, catalyst concentration, and the speed and order of reactant dosing.

5. A continuous production process for the closed-loop reaction of Pigment Violet 23 according to claim 1, characterized in that: The catalyst is a combination of copper sulfate and anthraquinone, which can play a catalytic oxidation role in the reaction process, increase the generation rate of pigment violet 23 and ensure the selectivity of the reaction.

6. A continuous production process for the closed-loop reaction of Pigment Violet 23 according to claim 1, characterized in that: The solvent used in the reaction is NMP, o-dichlorobenzene or chlorobenzene, which can stably dissolve the reactants at high temperatures and does not participate in side reactions.

7. A continuous production process for the closed-loop reaction of Pigment Violet 23 according to claim 1, characterized in that: The closed-loop reaction equipment includes a high-efficiency filtering and drying device, which can improve the purity of fluorescent violet 23 after the reaction is completed.

8. A continuous production process for the closed-loop reaction of Pigment Violet 23 according to claim 3, characterized in that: The process achieves automatic regulation of the entire reaction process through real-time feedback control system and reaction kinetics model optimization, reduces manual intervention, and improves reaction efficiency and stability.

9. A continuous production process for the closed-loop reaction of Pigment Violet 23 according to claim 3, characterized in that: The real-time data during the reaction process is stored and analyzed via a cloud platform, supporting remote management.

10. A continuous production device based on the ring-closing reaction of Pigment Violet 23 according to any one of claims 1 to 9, comprising: a) a feeding system for adding reactants; b) Reactor, heating / cooling system, stirring device and reaction monitoring sensor; c) static mixer and catalyst addition system for catalytic oxidation during the reaction process; d) Real-time monitoring system and automatic feedback adjustment system; e) Filtration and drying equipment for product separation and purification.