Method and system for efficiently extracting and purifying m-pentadiene

Abstract

The invention relates to the technical field of petrochemical engineering, and discloses an efficient pentadiene extraction and purification method and system, and the method comprises the following steps: screening out an effective solvent combination of pentadiene and other impurities, and arranging an automatic solvent extraction device of pentadiene and other impurities according to the extractable degree of the effective solvent combination to other impurities; the method comprises the following steps: collecting gas-liquid equilibrium data of m-pentadiene and other impurities, and setting gradient rectification temperatures of m-pentadiene and other impurities in combination with pyrolysis characteristics; the method comprises the following steps: configuring an efficient rectification separator for m-pentadiene and other impurities to obtain primarily purified m-pentadiene; detecting residual impurities of the primarily purified m-pentadiene, and creating a dynamic rectification switching mechanism and an impurity recovery unit of the m-pentadiene; in combination with an automatic solvent extraction device, an efficient rectification separator, an impurity recovery unit and a dynamic rectification switching mechanism, efficient extraction and purification treatment of m-pentadiene is executed. According to the method, the purity and the yield of the m-pentadiene can be improved.

Description

Technical Field

[0001] The invention relates to a high-efficiency piperylene extraction and purification method and system, belonging to the technical field of petrochemical industry. Background Art

[0002] Isomerate is an important chemical raw material and one of the main components of the C5 fraction. It is usually separated from the by-products of petroleum cracking to produce ethylene. It is a colorless, transparent liquid at room temperature and has typical properties of olefins, such as easy polymerization and flammability and explosiveness. It is widely used in synthetic rubber, resin and fine chemical fields. However, the crude isoside pipery obtained by the C5 separation process contains not only isoside pipery but also impurities such as cyclopentene, cyclopentane, cyclopentadiene and alkynes. These impurities not only affect the purity of isoside pipery but also have a toxic effect on its polymerization reaction catalyst. Therefore, the development of efficient isoside pipery purification technology is particularly important.

[0003] Traditional piperylene purification mainly relies on the extractive distillation method. Although this method can improve the purity of piperylene to a certain extent, due to the use of a fixed distillation temperature, it is easy to cause thermal decomposition and polymerization of piperylene, affecting the purity and yield of piperylene. Therefore, an efficient piperylene extraction and purification method is needed to improve the purity and yield of piperylene. Summary of the Invention

[0004] The present invention provides a high-efficiency piperylene extraction and purification method and system, the main purpose of which is to improve the purity and yield of piperylene.

[0005] To achieve the above objectives, the present invention provides an efficient method for extracting and purifying piperylene, comprising:

[0006] Obtaining piperylene and other impurities in the raw material, analyzing basic physicochemical properties of the piperylene and the other impurities, and screening an effective solvent combination for the piperylene and the other impurities based on the basic physicochemical properties;

[0007] Analyzing the extractability of the other impurities by the effective solvent combination, and setting an automatic solvent extraction device for the piperylene and the other impurities based on the effective solvent combination and the extractability;

[0008] Analyzing the pyrolysis characteristics of piperylene according to the basic physicochemical characteristics, collecting vapor-liquid equilibrium data of piperylene and the other impurities, and setting a gradient distillation temperature for piperylene and the other impurities based on the pyrolysis characteristics and the vapor-liquid equilibrium data;

[0009] configuring a high-efficiency distillation separator for separating the piperylene and the other impurities using the gradient distillation temperature and the relative volatility determined by the vapor-liquid equilibrium data, and performing a preliminary purification treatment on the piperylene based on the high-efficiency distillation separator to obtain preliminarily purified piperylene;

[0010] detecting residual impurities in the preliminarily purified piperylene, and establishing a dynamic distillation switching mechanism and an impurity recovery unit for the piperylene based on the residual impurities;

[0011] By combining the automatic solvent extraction device, the high-efficiency distillation separator, the impurity recovery unit and the dynamic distillation switching mechanism, the high-efficiency extraction and purification process of piperylene is performed to obtain a high-efficiency extraction and purification result.

[0012] Optionally, screening out an effective solvent combination of piperylene and the other impurities based on the basic physicochemical properties includes:

[0013] Based on the basic physicochemical properties, determining the solubility data of the piperylene and the other impurities in different solvents;

[0014] Calculating the dynamic relative selectivity coefficient of piperylene and the other impurities using the solubility data;

[0015] selecting candidate solvents for piperylene and the other impurities according to the dynamic relative selectivity coefficient;

[0016] performing a multi-channel parallel extraction process of the candidate solvent based on the piperylene and the other impurities to obtain a multi-channel solvent extraction result;

[0017] identifying the extraction rate and extraction equilibrium time of the candidate solvent from the multi-channel solvent extraction results;

[0018] According to the extraction rate and extraction equilibrium time, an effective solvent combination of the piperylene and the other impurities is screened out.

[0019] Optionally, analyzing the extractability of the other impurities by the effective solvent combination comprises:

[0020] Extracting the molecular structures corresponding to the other impurities and the classified solvents in the effective solvent combination and their corresponding solvent properties;

[0021] Analyzing the interaction pattern between the other impurities and the classified solvents based on the molecular structure and the properties of the solvent;

[0022] identifying the extraction efficiency of the other impurities based on the interaction pattern;

[0023] Collecting extraction experimental data of the other impurities according to the extraction efficiency;

[0024] Retrieving the unique identifier corresponding to the classified solvent, and constructing a correlation mapping network between the extraction experimental data, the unique identifier, and the molecular structure;

[0025] Based on the association mapping network, identifying association IDs of the effective solvent combination and the other impurities;

[0026] Analyzing the optimal solvent ratio of the effective solvent combination and the other impurities according to the correlation ID and the extraction efficiency;

[0027] The optimal solvent ratio is used to analyze the extractability of the other impurities by the effective solvent combination.

[0028] Optionally, the automatic solvent extraction device for piperylene and other impurities is set according to the effective solvent combination and the extractability, including:

[0029] configuring an extraction device for the piperylene and the other impurities according to the effective solvent combination and the extractability;

[0030] identifying the temperature sensitivity of the piperylene based on the effective solvent combination;

[0031] Determining the solubility of piperylene in a preset temperature sensitive range according to the temperature sensitivity to set adaptive temperature control parameters of the extraction device;

[0032] Using the selectivity coefficient of the piperylene to the other impurities, identifying the main solvent and the auxiliary solvent of the effective solvent combination, and setting the automatic solvent maintenance ratio of the main solvent and the auxiliary solvent;

[0033] collecting concentration data of the other impurities in real time to calculate the concentration change rate of the impurity concentration;

[0034] creating a concentration feedback control mechanism for the other impurities according to the concentration change rate;

[0035] Analyzing the mutual solubility and hot melting properties of the effective solvent combination, and creating a personalized solvent recovery method for the extraction device based on the mutual solubility and hot melting properties;

[0036] In combination with the adaptive temperature control parameters, the automatic solvent maintenance ratio, the concentration feedback control mechanism and the personalized solvent recovery method, an automatic solvent extraction device for the piperylene and the other impurities is set.

[0037] Optionally, setting the gradient distillation temperature of the piperylene and the other impurities based on the pyrolysis characteristics and the vapor-liquid equilibrium data includes:

[0038] Based on the pyrolysis characteristics, collecting pyrolysis data of the piperylene and identifying the pyrolysis starting temperature of the piperylene;

[0039] Calculating the temperature constraint upper limit of the piperylene according to the pyrolysis starting temperature;

[0040] Determining the decomposition temperature range of the other impurities using the pyrolysis data;

[0041] creating independent temperature control units for the piperylene and the other impurities based on the decomposition temperature range and the temperature constraint upper limit, and defining a temperature safety threshold for the independent temperature control unit;

[0042] identifying a vapor-liquid equilibrium state of the piperylene and the other impurities using the vapor-liquid equilibrium data;

[0043] setting adaptive temperature parameters for the piperylene and the other impurities according to the gas-liquid equilibrium state;

[0044] The gradient distillation temperature of the piperylene and the other impurities is set in combination with the independent temperature control unit, the temperature safety threshold and the adaptive temperature parameter.

[0045] Optionally, configuring a high-efficiency distillation separator for separating piperylene from other impurities using the gradient distillation temperature and the relative volatility determined by the vapor-liquid equilibrium data comprises:

[0046] Based on the gradient distillation temperature, constructing a distillation temperature curve of the piperylene and the other impurities;

[0047] Identifying a temperature inflection point in the distillation temperature curve and dividing the piperylene and the other impurities into segmented temperature control units based on the temperature inflection point;

[0048] According to the relative volatility, an adaptive gas-liquid equilibrium device is provided for the piperylene and the other impurities;

[0049] Based on the segmented temperature control unit, constructing a visual temperature distribution interface of the piperylene and the other impurities;

[0050] Identifying the easily pyrolyzed area of ​​the segmented temperature control unit through the visual temperature distribution interface;

[0051] Setting a dynamic response channel for piperylene and other impurities in the pyrolysis-prone region;

[0052] In combination with the segmented temperature control unit, the visual temperature distribution interface, the adaptive gas-liquid equilibrium device and the dynamic response channel, a high-efficiency distillation separator for separating piperylene and the other impurities is configured.

[0053] Optionally, the high-efficiency distillation separator is used to perform a preliminary purification treatment on the piperylene to obtain the preliminarily purified piperylene, comprising:

[0054] Inputting a purification target for piperylene and generating optimal purification parameters for piperylene based on the purification target;

[0055] According to the optimal purification parameters, an irregular temperature field of piperylene is generated by using a segmented temperature control unit of the high-efficiency distillation separator;

[0056] Obtaining a temperature distribution matrix and a component concentration vector of the high-efficiency distillation separator under the irregular temperature field;

[0057] Setting the result output condition of piperylene by the temperature distribution matrix and the component concentration vector;

[0058] When the result output condition meets the preset output condition, the preliminary purified piperylene is output.

[0059] Optionally, creating a dynamic distillation switching mechanism for piperylene according to the residual impurities comprises:

[0060] identifying an impurity concentration and an impurity characteristic of the residual impurities;

[0061] analyzing a concentration evolution trend of the impurity concentration, and identifying an abnormal pattern and abnormal duration of the residual impurities based on the concentration evolution trend;

[0062] Based on the impurity characteristics, setting a correction unit for the abnormal mode;

[0063] identifying an abnormal level of the residual impurities based on the impurity concentration and the abnormality duration;

[0064] Setting the gradient switching parameters of piperylene according to the abnormality level and the impurity concentration;

[0065] According to the gradient switching parameters, a multi-tower coordinated switching architecture for piperylene is created;

[0066] Collecting the distillation parameters of piperylene in the multi-tower coordinated switching architecture, and constructing a dynamic knowledge graph of the impurity characteristics and the distillation parameters;

[0067] Based on the dynamic knowledge graph, defining adaptive switching rules of the multi-tower collaborative switching architecture;

[0068] According to the multi-tower coordinated switching architecture, the adaptive switching rules and the correction unit, a dynamic distillation switching mechanism for piperylene is established.

[0069] Optionally, the step of creating an impurity recovery unit for piperylene based on the residual impurities comprises:

[0070] Identifying the impurity type of the residual impurities and analyzing the value density of the residual impurities based on the impurity type;

[0071] Based on the value density, setting a graded recovery path for the residual impurities;

[0072] analyzing the synergistic effects of the residual impurities according to the impurity types and identifying the classification effects of the synergistic effects;

[0073] Setting a recycling priority of the residual impurities based on the value density and the synergistic effect;

[0074] calculating an intensity coefficient of the synergistic effect, and constructing a dynamic compensation mechanism for the synergistic effect based on the intensity coefficient;

[0075] defining adaptive recovery parameters for the residual impurities based on the dynamic compensation mechanism;

[0076] The impurity recovery unit of piperylene is created by combining the graded recovery path, the adaptive recovery parameters and the recovery priority.

[0077] In order to solve the above problems, the present invention also provides an efficient piperylene extraction and purification system, the system comprising:

[0078] a candidate solvent identification module for obtaining piperylene and other impurities in the raw material, analyzing the basic physicochemical properties of the piperylene and the other impurities, and screening effective solvent combinations for the piperylene and the other impurities based on the basic physicochemical properties;

[0079] an automatic extraction module, configured to analyze the extractability of the other impurities by the effective solvent combination, and to set an automatic solvent extraction device for the piperylene and the other impurities based on the effective solvent combination and the extractability;

[0080] a gradient temperature setting module, configured to analyze the pyrolysis characteristics of piperylene according to the basic physicochemical characteristics, collect vapor-liquid equilibrium data of piperylene and the other impurities, and set a gradient distillation temperature for piperylene and the other impurities based on the pyrolysis characteristics and the vapor-liquid equilibrium data;

[0081] a distillation configuration module, configured to configure a high-efficiency distillation separator for separating the piperylene and the other impurities using the gradient distillation temperature and the relative volatility determined by the vapor-liquid equilibrium data, and to perform a preliminary purification treatment on the piperylene using the high-efficiency distillation separator to obtain preliminarily purified piperylene;

[0082] An impurity recovery module, configured to detect residual impurities in the preliminarily purified piperylene and, based on the residual impurities, establish a dynamic distillation switching mechanism and an impurity recovery unit for the piperylene;

[0083] The purification execution module is used to combine the automatic solvent extraction device, the high-efficiency distillation separator, the impurity recovery unit and the dynamic distillation switching mechanism to perform the high-efficiency extraction and purification process of the isoprene to obtain a high-efficiency extraction and purification result.

[0084] Compared with the problems described in the background technology, the embodiments of the present invention screen out an effective solvent combination for the piperylene and the other impurities based on the basic physicochemical properties, thereby optimizing the solvent ratio, reducing the subsequent distillation load, and reducing the number of solvent cycles and losses. Furthermore, the embodiments of the present invention analyze the degree of extractability of the other impurities by the effective solvent combination to determine the solubility limit of the impurities in the solvent phase, thereby avoiding failure of the solvent system due to excessive dissolution of impurities. The embodiments of the present invention set up an automatic solvent extraction device for the piperylene and the other impurities according to the effective solvent combination and the degree of extractability. It can ensure that piperylene and impurities are efficiently separated in the extraction phase, reduce the residue of the target product in the impurity phase, and improve the yield of piperylene; further, the embodiment of the present invention sets the gradient distillation temperature of piperylene and the other impurities based on the pyrolysis characteristics and the gas-liquid equilibrium data, thereby enhancing the separation efficiency of piperylene and impurities and reducing invalid heat energy consumption; the embodiment of the present invention configures a high-efficiency distillation separator for piperylene and the other impurities by utilizing the gradient distillation temperature and the relative volatility determined by the gas-liquid equilibrium data, thereby accurately controlling the temperature and pressure distribution in the distillation tower, and realizing the separation of piperylene and other impurities. Effective separation of impurities improves product quality; further, the embodiment of the present invention performs a preliminary purification treatment on the piperylene based on the high-efficiency distillation separator to obtain preliminary purified piperylene, which can improve the purity and yield of piperylene and reduce energy consumption and production costs; the embodiment of the present invention can help locate the purification defects of piperylene by detecting the residual impurities in the preliminary purified piperylene, ensure that the product meets the standards, and create a dynamic distillation switching mechanism for the piperylene based on the residual impurities, which can adjust the distillation strategy in real time to ensure that no matter how the raw materials change, the purification effect can be maintained by flexibly switching the process mode; further, The embodiment of the present invention creates an impurity recovery unit for the piperylene based on the residual impurities, thereby improving resource utilization and optimizing the operating efficiency of the distillation system. Finally, the embodiment of the present invention performs an efficient extraction and purification process of the piperylene by combining the automatic solvent extraction device, the efficient distillation separator, the impurity recovery unit, and the dynamic distillation switching mechanism to obtain an efficient extraction and purification result, which can reduce the inhibitory effect of impurities on the main product, improve the overall yield of piperylene purification, and maximize the purity of piperylene. At the same time, it can reduce ineffective energy consumption and operation time, improve production efficiency and raw material utilization, and reduce production costs. Therefore, the efficient piperylene extraction and purification method and system provided by the embodiment of the present invention can improve the purity and yield of piperylene. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] Figure 1 A schematic flow chart of a highly efficient piperylene extraction and purification method provided by one embodiment of the present invention;

[0086] Figure 2 A process flow chart for implementing a highly efficient piperylene extraction and purification method according to an embodiment of the present invention;

[0087] Figure 3 A schematic diagram of a module for realizing a high-efficiency piperylene extraction and purification system provided in one embodiment of the present invention.

[0088] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0089] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0090] The present embodiment provides a highly efficient piperylene extraction and purification method. The execution entity of this highly efficient piperylene extraction and purification method includes, but is not limited to, at least one of electronic devices such as a server or terminal that can be configured to execute the method provided in this embodiment. In other words, this highly efficient piperylene extraction and purification method can be executed by software or hardware installed on a terminal device or a server device. The server includes, but is not limited to, a single server, a server cluster, a cloud server, or a cloud server cluster.

[0091] Example 1:

[0092] Reference Figure 1 FIG. 1 is a flow chart of a highly efficient piperylene extraction and purification method according to an embodiment of the present invention. In this embodiment, the highly efficient piperylene extraction and purification method comprises:

[0093] S1. Obtain piperylene and other impurities in the raw material, analyze the basic physicochemical properties corresponding to the piperylene and the other impurities, and screen out an effective solvent combination for the piperylene and the other impurities based on the basic physicochemical properties.

[0094] The embodiments of the present invention can provide data support for subsequent piperylene purification by obtaining piperylene and other impurities in the raw materials. The raw materials refer to the initial materials used to extract piperylene and separate impurities, such as the C5 fraction of petroleum cracking. The piperylene refers to a colorless liquid with the chemical formula C5H8. The impurities refer to other substances mixed in during the production process, including cyclopentadiene, alkynes, cyclopentene and cyclopentane.

[0095] Furthermore, the embodiments of the present invention can help set and optimize the separation parameters of isoprene and its impurities by analyzing the basic physicochemical properties corresponding to the isoprene and the other impurities. The basic physicochemical properties refer to the physical and chemical properties inherent in isoprene and its impurities. Physical properties include solubility, boiling point, melting point, vapor pressure, etc. For example, the boiling point of isoprene is 34°C, and the boiling point of isoprene is 34.1°C. Chemical properties include molecular structure (such as double bond position, functional group), polymerization activity, redox properties, acidity and alkalinity, reaction rate with other substances, etc. For example, isoprene contains conjugated double bonds and is more susceptible to Diels-Alder reaction or self-polymerization than isoprene, and the temperature needs to be controlled during purification to prevent polymerization.

[0096] Optionally, the basic physicochemical properties corresponding to the piperylene and the other impurities can be analyzed by chromatography-mass spectrometry.

[0097] The embodiments of the present invention screen out an effective solvent combination for the piperylene and the other impurities based on the basic physicochemical properties, thereby optimizing the solvent ratio, reducing the subsequent distillation load, and reducing the number of solvent cycles and losses. The effective solvent combination refers to a solvent mixture that can effectively dissolve piperylene while minimizing the dissolution of impurities during the purification process, including a main solvent and an auxiliary solvent.

[0098] As an embodiment of the present invention, screening out an effective solvent combination of piperylene and the other impurities based on the basic physicochemical properties includes:

[0099] Based on the basic physicochemical properties, determining the solubility data of the piperylene and the other impurities in different solvents;

[0100] Calculating the dynamic relative selectivity coefficient of piperylene and the other impurities using the solubility data;

[0101] selecting candidate solvents for piperylene and the other impurities according to the dynamic relative selectivity coefficient;

[0102] performing a multi-channel parallel extraction process of the candidate solvent based on the piperylene and the other impurities to obtain a multi-channel solvent extraction result;

[0103] identifying the extraction rate and extraction equilibrium time of the candidate solvent from the multi-channel solvent extraction results;

[0104] According to the extraction rate and extraction equilibrium time, an effective solvent combination of the piperylene and the other impurities is screened out.

[0105] Among them, the solubility data refers to the maximum amount of data that can be dissolved in unit volume of solvent when isopentadiene and other impurities reach solubility equilibrium under specific temperature and pressure conditions. The dynamic relative selectivity coefficient refers to a quantitative indicator of the change in the solvent's ability to separate isopentadiene and impurities with temperature. The candidate solvent refers to a solvent whose relative selectivity coefficient is greater than a preset selectivity threshold and can enter the experimental verification stage, such as a solvent with a relative selectivity coefficient greater than 5. The multi-channel parallel extraction process refers to the process of using a microfluidic chip to simultaneously perform extraction experiments with multiple candidate solvents and isopentadiene and impurity mixtures through parallel operations. The multi-channel solvent extraction result refers to the real-time data and final equilibrium data of the extraction process in each channel in the multi-channel parallel extraction experiment. The extraction rate refers to the amount of isopentadiene transferred from the raw material phase to the solvent phase per unit time, usually expressed as a concentration change rate. The extraction equilibrium time refers to the time required from the start of extraction to the time when the isopentadiene concentration in the two phases reaches a stable equilibrium state.

[0106] Optionally, based on the basic physicochemical properties, the solubility data of piperylene and the other impurities in different solvents can be determined by an equilibrium method, such as fully mixing piperylene or impurities with a solvent at a constant temperature, separating the liquid phases after reaching a dissolution equilibrium, and obtaining a solute concentration. Using the solubility data, the dynamic relative selectivity coefficient of piperylene and the other impurities can be obtained by the solubility ratio of the solvent to piperylene and the other impurities at multiple temperature points. Based on the dynamic relative selectivity coefficient, candidate solvents for piperylene and the other impurities can be selected using a threshold filtering algorithm.

[0107] For example, three candidate solvents are known, namely hexane, heptane and acetonitrile, and the impurity is 2-butyne. Through different channels of the microfluidic chip, the mixture of isopentadiene and 2-butyne is extracted with hexane, heptane and acetonitrile, respectively. After 60 minutes of extraction, the extraction rates of intermediate isopentadiene and 2-butyne in each channel are measured respectively. Among them, the extraction rate of intermediate isopentadiene is 70%, and the extraction rate of 2-butyne is 20%.

[0108]

[0109] Conclusion: When hexane, heptane and acetonitrile were used as extraction solvents, the extraction rate of piperylene was significantly higher than that of 2-butyne, and all of them had good selective solubility for piperylene.

[0110] S2. Analyze the extractability of the other impurities by the effective solvent combination, and set an automatic solvent extraction device for the piperylene and the other impurities based on the effective solvent combination and the extractability.

[0111] By analyzing the extractability of the other impurities by the effective solvent combination, the embodiment of the present invention can determine the solubility limit of the impurities in the solvent phase, thereby avoiding failure of the solvent system due to excessive dissolution of impurities. The extractability refers to the ease with which other impurities are extracted by the solvent during the extraction and separation process.

[0112] As an embodiment of the present invention, the analyzing the extractability of the other impurities by the effective solvent combination includes:

[0113] Extracting the molecular structures corresponding to the other impurities and the classified solvents in the effective solvent combination and their corresponding solvent properties;

[0114] Analyzing the interaction pattern between the other impurities and the classified solvents based on the molecular structure and the properties of the solvent;

[0115] identifying the extraction efficiency of the other impurities based on the interaction pattern;

[0116] Collecting extraction experimental data of the other impurities according to the extraction efficiency;

[0117] Retrieving the unique identifier corresponding to the classified solvent, and constructing a correlation mapping network between the extraction experimental data, the unique identifier, and the molecular structure;

[0118] Based on the association mapping network, identifying association IDs of the effective solvent combination and the other impurities;

[0119] Analyzing the optimal solvent ratio of the effective solvent combination and the other impurities according to the correlation ID and the extraction efficiency;

[0120] The optimal solvent ratio is used to analyze the extractability of the other impurities by the effective solvent combination.

[0121] Among them, the molecular structure refers to the chemical molecular composition and spatial configuration of other impurities, including the atomic connection mode, functional group type, and stereochemical characteristics. The classified solvent refers to the classification of the components in the effective solvent combination into different categories according to the chemical properties or functions of the solvent, such as polar solvents, non-polar solvents, hydrogen bond acceptor solvents, etc. The solvent properties refer to parameters describing the physicochemical properties of the solvent, including solubility, volatility, toxicity, polarity, etc. The interaction mode refers to the mode of action between the solvent and the impurity through chemical bonds (such as hydrogen bonds, van der Waals forces, electrostatic forces, etc.) or physical effects (such as dissolution, adsorption, etc.). For example, acetonitrile and residual impurities can interact through hydrogen bonds, thereby increasing the solubility of impurities. The extraction efficiency refers to the ratio or rate of impurity transfer from the original system to the solvent phase under specific conditions. The calculation formula is: Extraction efficiency (%) = (extraction efficiency) The extraction experimental data refers to quantitative data related to the extraction process measured through experiments, including impurity concentrations before and after extraction, solvent dosage, temperature, pressure, extraction time, etc. The unique identifier refers to a standardized code used to uniquely identify the solvent, usually a CAS number, such as 67-56-1 for methanol and 67-64-1 for acetone. The association mapping network refers to a complex network structure formed by associating and mapping extraction experimental data, unique identifiers, molecular structures and other information through a graph database. The association ID refers to a unique code used to identify the corresponding relationship between a specific solvent combination and impurities in the association mapping network. The optimal solvent ratio refers to the solvent combination and its ratio that can achieve the highest extraction efficiency under specific extraction conditions, obtained using the NSGA-II multi-objective optimization algorithm.

[0122] Optionally, based on the molecular structure and the solvent properties, the interaction pattern between the other impurities and the classified solvent can be analyzed by binding energy analysis between the solvent and other impurities, the unique identifier corresponding to the classified solvent can be retrieved through the CAS official website, and based on the association mapping network, the association ID of the effective solvent combination and the other impurities can be identified using a database index.

[0123] Furthermore, the embodiment of the present invention can ensure efficient separation of piperylene and impurities in the extraction phase by setting up an automatic solvent extraction device for piperylene and the other impurities according to the effective solvent combination and the degree of extractability, reduce the residue of the target product in the impurity phase, and improve the yield of piperylene. The automatic solvent extraction device refers to an integrated device that realizes extraction, separation, and solvent recovery through automation technology.

[0124] As an embodiment of the present invention, the automatic solvent extraction device for piperylene and the other impurities is set according to the effective solvent combination and the extractability, including:

[0125] configuring an extraction device for the piperylene and the other impurities according to the effective solvent combination and the extractability;

[0126] identifying the temperature sensitivity of the piperylene based on the effective solvent combination;

[0127] Determining the solubility of piperylene in a preset temperature sensitive range according to the temperature sensitivity to set adaptive temperature control parameters of the extraction device;

[0128] Using the selectivity coefficient of the piperylene to the other impurities, identifying the main solvent and the auxiliary solvent of the effective solvent combination, and setting the automatic solvent maintenance ratio of the main solvent and the auxiliary solvent;

[0129] collecting concentration data of the other impurities in real time to calculate the concentration change rate of the impurity concentration;

[0130] creating a concentration feedback control mechanism for the other impurities according to the concentration change rate;

[0131] Analyzing the mutual solubility and hot melting properties of the effective solvent combination, and creating a personalized solvent recovery method for the extraction device based on the mutual solubility and hot melting properties;

[0132] In combination with the adaptive temperature control parameters, the automatic solvent maintenance ratio, the concentration feedback control mechanism and the personalized solvent recovery method, an automatic solvent extraction device for the piperylene and the other impurities is set.

[0133] Among them, the extraction device refers to a combination of equipment for separating isoprene from other impurities by solvent extraction, which usually includes components such as an extraction tower, a mixer, a separator, a temperature control system, and a solvent circulation device. The temperature sensitivity refers to the sensitivity of isoprene's solubility, chemical activity, or phase behavior to temperature changes in a specific solvent combination. The preset temperature sensitive range refers to a temperature range that is pre-set according to temperature sensitivity and has the most significant effect on its solubility, such as 20-40°C. The solubility refers to the maximum amount of isoprene that can be dissolved in a unit volume of solvent. The adaptive The temperature control parameter refers to the dynamic temperature control parameter set for the extraction device based on the temperature sensitivity and solubility data. For example, when the system detects a decrease in solubility, it automatically raises the temperature by 2°C and maintains a constant temperature. The selectivity coefficient refers to the ratio of the solubility of the solvent to piperylene and other impurities. The main solvent refers to the solvent that plays a leading role in the solubility of piperylene in the effective solvent combination and has a higher selectivity coefficient, such as acetonitrile. The auxiliary solvent refers to the solvent used in combination with the main solvent to adjust the polarity, viscosity, boiling point and other properties of the main solvent, such as methanol. The solvent is automatically maintained. The holding ratio refers to the dynamic ratio of the main solvent to the auxiliary solvent set according to the selectivity coefficient, such as main solvent: auxiliary solvent = 7:3, the concentration data refers to the impurity molar concentration data collected in real time by an ultraviolet-visible spectrophotometer (wavelength 210-250nm), the concentration change rate refers to the change in impurity concentration per unit time, and the concentration feedback control mechanism refers to a closed-loop control system that automatically adjusts the extraction parameters (such as solvent flow, temperature, and stirring rate) by real-time monitoring of the impurity concentration change rate. For example, when the concentration change rate is less than a set threshold (such as 0.02mol / (L·min)), the temperature is automatically raised by 0.5-1°C and the proportion of auxiliary solvent is increased by 1-3%. The degree of mutual solubility refers to the mutual solubility between the main solvent and the auxiliary solvent in the effective solvent combination. The hot melt characteristics refer to the specific heat capacity, heat of vaporization, thermal stability and other characteristics of the solvent combination, which are determined by DSC thermal analysis. The personalized solvent recovery method refers to a customized solvent regeneration process based on the degree of mutual solubility and hot melt characteristics of the solvents. For example, for high-boiling-point, mutually soluble solvent combinations, reduced pressure distillation is used for recovery, and for heat-sensitive solvents, low-temperature membrane separation technology is used.

[0134] Optionally, based on the effective solvent combination, the temperature sensitivity of the isopentylene can be identified by DSC differential scanning calorimetry, the adaptive temperature control parameters of the extraction device can be set using a BP neural network, the selectivity coefficient of the isopentylene and the other impurities, the automatic solvent maintenance ratio of the main solvent and the auxiliary solvent can be set by a proportional-integral-differential controller, and the concentration change rate of the impurity concentration can be calculated by a five-point sliding average method.

[0135] S3. Analyze the pyrolysis characteristics of piperylene according to the basic physicochemical properties, collect gas-liquid equilibrium data of piperylene and the other impurities, and set the gradient distillation temperature of piperylene and the other impurities based on the pyrolysis characteristics and the gas-liquid equilibrium data.

[0136] By analyzing the pyrolysis characteristics of isoprene based on the basic physicochemical properties, the embodiments of the present invention can clarify the safety threshold of the upper temperature limit during the distillation process and avoid pyrolysis side reactions caused by excessively high temperatures. The pyrolysis characteristics refer to the reaction characteristics of isoprene under heating conditions, in which the intramolecular chemical bonds break and small molecular products are generated.

[0137] Optionally, based on the basic physicochemical properties, the thermal decomposition properties of piperylene can be analyzed by thermogravimetric analysis.

[0138] Furthermore, the embodiments of the present invention can help determine the thermodynamic boundaries of the distillation operation and optimize the distillation temperature distribution of piperylene and other impurities by collecting the gas-liquid equilibrium data of piperylene and the other impurities. The gas-liquid equilibrium data refers to a set of thermodynamic parameters when piperylene and the other impurities reach equilibrium between the gaseous and liquid states, including phase equilibrium constant, relative volatility, activity coefficient, etc.

[0139] Optionally, the gas-liquid equilibrium data of the piperylene and the other impurities can be collected through a circulating equilibrium kettle.

[0140] The embodiment of the present invention can enhance the separation efficiency of piperylene and impurities and reduce ineffective heat energy consumption by setting the gradient distillation temperature of piperylene and the other impurities based on the pyrolysis characteristics and the gas-liquid equilibrium data. The gradient distillation temperature refers to a temperature control strategy that changes in stages during the distillation process according to the boiling point differences and pyrolysis characteristics of the components of the mixture.

[0141] As an embodiment of the present invention, setting the gradient distillation temperature of the piperylene and the other impurities based on the pyrolysis characteristics and the vapor-liquid equilibrium data includes:

[0142] Based on the pyrolysis characteristics, collecting pyrolysis data of the piperylene and identifying the pyrolysis starting temperature of the piperylene;

[0143] Calculating the temperature constraint upper limit of the piperylene according to the pyrolysis starting temperature;

[0144] Determining the decomposition temperature range of the other impurities using the pyrolysis data;

[0145] creating independent temperature control units for the piperylene and the other impurities based on the decomposition temperature range and the temperature constraint upper limit, and defining a temperature safety threshold for the independent temperature control unit;

[0146] identifying a vapor-liquid equilibrium state of the piperylene and the other impurities using the vapor-liquid equilibrium data;

[0147] setting adaptive temperature parameters for the piperylene and the other impurities according to the gas-liquid equilibrium state;

[0148] The gradient distillation temperature of the piperylene and the other impurities is set in combination with the independent temperature control unit, the temperature safety threshold and the adaptive temperature parameter.

[0149] Among them, the pyrolysis data refers to the quantitative data of the physical and chemical changes of isopentylene and impurities during the heating process, including the thermal decomposition starting temperature, decomposition rate curve, thermal weight loss rate, pyrolysis product composition, etc. The thermal decomposition starting temperature refers to the critical temperature at which isopentylene molecules begin to undergo significant thermal decomposition (such as chemical bond breaking, polymerization reaction, etc.). For example, the temperature corresponding to the weight loss rate ≥1% / min is used as the thermal decomposition starting temperature. The temperature constraint upper limit refers to the maximum allowable operating temperature calculated based on the thermal decomposition starting temperature and the process safety factor (such as reserving a 10-20°C buffer zone). The decomposition temperature range refers to the temperature range in which other impurities undergo thermal decomposition. For example, the decomposition temperature range of an oxygen-containing compound impurity is 90-110°C, which means that it begins to decompose at 90°C and is completely decomposed at 110°C. The independent temperature control unit refers to an independent temperature control section divided according to the pyrolysis characteristics of the material in the gradient distillation tower, including a semiconductor temperature control module, a fusible mechanical temperature limiter, and annular copper thermal fins. The temperature safety threshold refers to the temperature control boundary value of each independent temperature control unit, including an upper threshold and a lower threshold. The gas-liquid equilibrium state refers to the state when the gas phase and liquid phase composition of the mixture of isopentylene and impurities reach dynamic equilibrium under a certain temperature and pressure, usually described by parameters such as phase diagram, relative volatility α, and activity coefficient. The adaptive temperature parameter refers to the temperature control parameter adjusted in real time according to the gas-liquid equilibrium state, including the target temperature, temperature gradient slope, temperature change rate, etc. of each temperature control unit. For example, when the relative volatility α is less than 1.2, the gradient temperature control mode is started, and when it is near the azeotropic point, the pulse temperature adjustment is triggered.

[0150] Optionally, based on the pyrolysis characteristics, the pyrolysis data of piperylene can be collected by thermogravimetry-differential scanning calorimetry, and based on the decomposition temperature range and the upper limit of the temperature constraint, the independent temperature control units for piperylene and the other impurities can be created using distributed temperature sensors combined with a PLC control system.

[0151] S4. Using the gradient distillation temperature and the relative volatility determined by the vapor-liquid equilibrium data, a high-efficiency distillation separator is configured to separate the piperylene and the other impurities. Based on the high-efficiency distillation separator, the piperylene is preliminarily purified to obtain preliminarily purified piperylene.

[0152] The embodiment of the present invention utilizes the gradient distillation temperature and the relative volatility determined by the gas-liquid equilibrium data to configure a high-efficiency distillation separator for isoprene and the other impurities, thereby accurately controlling the temperature and pressure distribution in the distillation tower, achieving effective separation of isoprene and other impurities, and improving product quality. The relative volatility refers to the ratio of the volatility of isoprene to that of other impurities under specific conditions. The high-efficiency distillation separator refers to a device that can achieve high-purity separation, low-energy consumption operation, and efficient mass and heat transfer during the distillation process through optimized design and parameter control.

[0153] As an embodiment of the present invention, the method of configuring a high-efficiency distillation separator for separating piperylene from other impurities using the gradient distillation temperature and the relative volatility determined by the vapor-liquid equilibrium data includes:

[0154] Based on the gradient distillation temperature, constructing a distillation temperature curve of the piperylene and the other impurities;

[0155] Identifying a temperature inflection point in the distillation temperature curve and dividing the piperylene and the other impurities into segmented temperature control units based on the temperature inflection point;

[0156] According to the relative volatility, an adaptive gas-liquid equilibrium device is provided for the piperylene and the other impurities;

[0157] Based on the segmented temperature control unit, constructing a visual temperature distribution interface of the piperylene and the other impurities;

[0158] Identifying the easily pyrolyzed area of ​​the segmented temperature control unit through the visual temperature distribution interface;

[0159] Setting a dynamic response channel for piperylene and other impurities in the pyrolysis-prone region;

[0160] In combination with the segmented temperature control unit, the visual temperature distribution interface, the adaptive gas-liquid equilibrium device and the dynamic response channel, a high-efficiency distillation separator for separating piperylene and the other impurities is configured.

[0161] Among them, the distillation temperature curve refers to a curve reflecting the temperature changes of isopentylene and impurities in different tower sections, the temperature inflection point refers to the critical point where the temperature change rate suddenly changes, the segmented temperature control unit refers to dividing the distillation process into several independent temperature-controlled regional units with the temperature inflection point as the boundary, the adaptive gas-liquid equilibrium device refers to a device that dynamically adjusts the gas-liquid two-phase equilibrium state according to the relative volatility, including a rotatable tower plate assembly, dynamic adjustment rules, and a porous distributor, the visual temperature distribution interface refers to a visualization system that displays the temperature distribution in the distillation tower in real time through software or instruments, the easily pyrolytic area refers to the area where the temperature exceeds the thermal stability threshold of the material during the distillation process, resulting in thermal decomposition of isopentylene or impurities, and the dynamic response channel refers to a temperature emergency adjustment channel set in the easily pyrolytic area, which is used to quickly respond to temperature anomalies and can be composed of a spiral stainless steel cooling coil, a piezoelectric temperature alarm, and linkage control logic.

[0162] Optionally, the temperature inflection point in the distillation temperature curve can be identified by the zero point of the second derivative of the temperature change rate. According to the relative volatility, the adaptive gas-liquid equilibrium device of the isopentylene and the other impurities can be set using a fuzzy adaptive PID control algorithm. Based on the segmented temperature control unit, the visual temperature distribution interface of the isopentylene and the other impurities can be constructed through a Web front-end framework.

[0163] Furthermore, the embodiment of the present invention performs a preliminary purification treatment on the piperylene based on the high-efficiency distillation separator to obtain preliminary purified piperylene, which can improve the purity and yield of piperylene and reduce energy consumption and production costs. The preliminary purified piperylene refers to an intermediate product mainly composed of piperylene obtained after solvent extraction and gradient distillation separation.

[0164] As an embodiment of the present invention, the high-efficiency distillation separator is used to perform preliminary purification of the piperylene to obtain preliminary purified piperylene, comprising:

[0165] Inputting a purification target for piperylene and generating optimal purification parameters for piperylene based on the purification target;

[0166] According to the optimal purification parameters, an irregular temperature field of piperylene is generated by using a segmented temperature control unit of the high-efficiency distillation separator;

[0167] Obtaining a temperature distribution matrix and a component concentration vector of the high-efficiency distillation separator under the irregular temperature field;

[0168] Setting the result output condition of piperylene by the temperature distribution matrix and the component concentration vector;

[0169] When the result output condition meets the preset output condition, the preliminary purified piperylene is output.

[0170] The purification target refers to the quality index of the piperylene product that needs to be achieved through the distillation separation process, such as piperylene purity ≥97.5%, cyclopentadiene content ≤0.3%, and yield ≥88%. The optimal purification parameters refer to the combination of operating parameters that makes the objective function J reach the extreme value under given equipment constraints. The irregular temperature field refers to the non-uniform and nonlinear temperature distribution pattern set in the axial and radial directions within the high-efficiency distillation separator. The temperature distribution matrix refers to a discretized data structure that characterizes the three-dimensional temperature field of the high-efficiency distillation separator. The component concentration vector refers to the mole fraction composition at a specific location within the high-efficiency distillation separator. The result output condition refers to a set of judgment rules that determine when to produce the preliminary purified product, such as the piperylene concentration in the overhead product ≥92% and the pressure in the tower <0.1 MPa. The preset output condition refers to a set of hard judgment thresholds pre-set according to the piperylene purification target before the high-efficiency distillation separation process is started, which are used to determine whether the current separation state meets the standard for producing the preliminary purified product.

[0171] Optionally, based on the purification target, the optimal purification parameters of isopentylene can be generated by a multi-objective optimization algorithm, and according to the optimal purification parameters, the segmented temperature control unit of the high-efficiency distillation separator generates the irregular temperature field of isopentylene, which can be achieved by an asymmetric heating strategy optimized by the response surface method, the temperature distribution matrix of the high-efficiency distillation separator in the irregular temperature field can be obtained by a distributed optical fiber temperature measurement system, and the component concentration vector of the high-efficiency distillation separator in the irregular temperature field can be obtained by online near-infrared spectroscopy combined with a PLS regression model.

[0172] S5. Detect residual impurities in the preliminarily purified piperylene, and create a dynamic distillation switching mechanism and an impurity recovery unit for the piperylene based on the residual impurities.

[0173] The embodiments of the present invention can help locate the purification defects of piperylene and ensure that the product meets the standards by detecting the residual impurities of the preliminary purified piperylene. The residual impurities refer to non-piperylene components that cannot be completely removed from the target product during the preliminary purification of piperylene, such as isoprene, cyclopentane, piperylene dimer, etc.

[0174] Optionally, the residual impurities in the preliminary purified piperylene can be detected by trace impurity analysis technology, such as gas chromatography-mass spectrometry.

[0175] Furthermore, the embodiment of the present invention creates a dynamic distillation switching mechanism for the isoprene based on the residual impurities, and can adjust the distillation strategy in real time to ensure that no matter how the raw materials change, the purification effect can be maintained by flexibly switching the process mode. The dynamic distillation switching mechanism refers to a process control strategy that dynamically adjusts and intelligently switches the operating parameters, process modes or equipment combinations of the distillation process based on real-time detection data and process requirements.

[0176] As an embodiment of the present invention, the step of creating a dynamic distillation switching mechanism for piperylene based on the residual impurities includes:

[0177] identifying an impurity concentration and an impurity characteristic of the residual impurities;

[0178] analyzing a concentration evolution trend of the impurity concentration, and identifying an abnormal pattern and abnormal duration of the residual impurities based on the concentration evolution trend;

[0179] Based on the impurity characteristics, setting a correction unit for the abnormal mode;

[0180] identifying an abnormal level of the residual impurities based on the impurity concentration and the abnormality duration;

[0181] Setting the gradient switching parameters of piperylene according to the abnormality level and the impurity concentration;

[0182] According to the gradient switching parameters, a multi-tower coordinated switching architecture for piperylene is created;

[0183] Collecting the distillation parameters of piperylene in the multi-tower coordinated switching architecture, and constructing a dynamic knowledge graph of the impurity characteristics and the distillation parameters;

[0184] Based on the dynamic knowledge graph, defining adaptive switching rules of the multi-tower collaborative switching architecture;

[0185] According to the multi-tower coordinated switching architecture, the adaptive switching rules and the correction unit, a dynamic distillation switching mechanism for piperylene is established.

[0186] Among them, the impurity concentration refers to the specific content of residual impurities in the preliminary purified isoprene, the impurity characteristics refer to the physical and chemical properties of the residual impurities, including but not limited to boiling point, polarity, heat sensitivity, reactivity, corrosiveness, etc., the concentration evolution trend refers to the change pattern of impurity concentration over time or distillation process, the abnormal mode refers to the characteristic mode of deviation from the normal trend during the evolution of impurity concentration, including sudden change, increased fluctuation, periodic abnormality, etc., the correction unit refers to the parameter adjustment strategy or process compensation measure designed for a specific abnormal mode, the abnormal duration refers to the length of time from the beginning of the abnormal mode to the recovery to the normal range, the abnormal level It refers to the risk level divided according to the impurity concentration, abnormality duration and the degree of impact on product quality. The gradient switching parameter refers to a step-by-step, smoothly changing distillation operating parameter adjustment plan designed according to the abnormality level. The multi-tower collaborative switching architecture refers to a dynamic coupling system composed of a main distillation tower, an auxiliary tower and a buffer tower. The distillation parameters refer to the key operating variables affecting the distillation process, including temperature distribution, pressure, reflux ratio, feed position, tower plate efficiency, etc. The dynamic knowledge graph refers to a dynamic knowledge base that represents the relationship between impurity characteristics and distillation parameters in a graph structure. The adaptive switching rule refers to the switching decision logic automatically generated based on the dynamic knowledge graph and real-time data.

[0187] Optionally, the concentration evolution trend of the impurity concentration can be analyzed using a sliding window algorithm, the correction unit of the abnormal mode based on the impurity characteristics can be set by developing a modular correction unit library, the distillation parameters of isopentylene in the multi-tower collaborative switching architecture can be collected through distributed sensors, the dynamic knowledge graph of the impurity characteristics and the distillation parameters can be constructed using a graph neural network, and the adaptive switching rules of the multi-tower collaborative switching architecture based on the dynamic knowledge graph can be defined using a reinforcement learning algorithm.

[0188] The embodiment of the present invention can improve resource utilization and optimize the operating efficiency of the distillation system by creating an impurity recovery unit for isoprene based on the residual impurities. The impurity recovery unit refers to a functional module for collecting, classifying, processing and resource utilization of residual impurities separated in the dynamic distillation process in the isoprene production process.

[0189] As an embodiment of the present invention, the impurity recovery unit for piperylene is created based on the residual impurities, comprising:

[0190] Identifying the impurity type of the residual impurities and analyzing the value density of the residual impurities based on the impurity type;

[0191] Based on the value density, setting a graded recovery path for the residual impurities;

[0192] analyzing the synergistic effects of the residual impurities according to the impurity types and identifying the classification effects of the synergistic effects;

[0193] Setting a recycling priority of the residual impurities based on the value density and the synergistic effect;

[0194] calculating an intensity coefficient of the synergistic effect, and constructing a dynamic compensation mechanism for the synergistic effect based on the intensity coefficient;

[0195] defining adaptive recovery parameters for the residual impurities based on the dynamic compensation mechanism;

[0196] The impurity recovery unit of piperylene is created by combining the graded recovery path, the adaptive recovery parameters and the recovery priority.

[0197] Among them, the impurity type refers to the type of compound remaining in the production process of isopentadiene, including hydrocarbon impurities, heteroatom impurities, polymer impurities, metal complex impurities, etc. The value density refers to the difference between the economic value of the residual impurities per unit mass and the processing cost, and the calculation formula is: value density = (impurity market price - unit processing cost) ÷ impurity mass. The graded recovery path refers to a technical route that divides the residual impurities into different processing levels according to the value density. For example, high-value impurities are purified and recovered by high-precision separation technologies such as distillation and extraction, and low-value impurities are reduced by incineration, high-temperature decomposition, etc. The synergistic effect refers to the interactive influence of residual impurities on the separation and recovery process through physical or chemical reactions, such as cyclopentadiene. The formation of an azeotrope with isoprene can reduce the relative volatility, but the separation can be enhanced by adding an azeotrope. The classification effect refers to the subdivision of the synergistic effect according to the mechanism of action and engineering impact, including thermodynamic synergistic effect, kinetic synergistic effect, and catalytic synergistic effect. The recovery priority refers to the impurity treatment order determined by the comprehensive value density and synergistic effect. The intensity coefficient refers to a dimensionless parameter that quantifies the degree of influence of the synergistic effect. The dynamic compensation mechanism refers to a systematic adjustment strategy that compensates for the influence of the synergistic effect by adjusting the recovery process parameters or equipment operation mode in real time according to the intensity change of the synergistic effect between residual impurities. The adaptive recovery parameters refer to the process operation parameters automatically optimized by the dynamic compensation mechanism.

[0198] Optionally, the classification effect of the synergistic effect can be jointly identified by differential scanning calorimetry and dynamic light scattering, the recovery priority of the residual impurities based on the value density and the synergistic effect can be set by a genetic algorithm, and the dynamic compensation mechanism of the synergistic effect based on the intensity coefficient can be constructed using a fuzzy PID control algorithm.

[0199] In an optional embodiment of the present invention, the intensity coefficient of the synergistic effect is calculated using the following formula:

[0200]

[0201] Where P(t) represents the intensity coefficient of the synergistic effect, w e represents the mole fraction of the residual impurity e in the synergistic effect, n represents the number of residual impurity types in the synergistic effect, e represents the category index of the residual impurity, t represents time, ΔZ e Z represents the change in the yield of piperylene in the presence of residual impurity e in the synergistic effect. base represents the base piperylene yield in the synergistic effect, It represents the logarithmic concentration change rate of the residual impurity e in the synergistic effect, dt represents the small change in time t, and τ represents the characteristic time constant.

[0202] It should be noted that in this application, this formula takes into account the dynamic process of impurity concentration changes over time, which can more accurately reflect the direction and intensity of the synergistic effect of a complex system of multiple impurities. In particular, it should be noted that the formula Describes how fast the logarithmic concentration of the impurity e changes over time. For example, if If the value is positive, it means that the logarithmic concentration of impurity e is increasing over time. If it is negative, it means that the logarithmic concentration is decreasing.

[0203] S6. Combining the automatic solvent extraction device, the high-efficiency distillation separator, the impurity recovery unit and the dynamic distillation switching mechanism, perform high-efficiency extraction and purification of piperylene to obtain a high-efficiency extraction and purification result.

[0204] The embodiment of the present invention combines the automatic solvent extraction device, the high-efficiency distillation separator, the impurity recovery unit and the dynamic distillation switching mechanism to perform the high-efficiency extraction and purification treatment of isopentylene, and obtains a high-efficiency extraction and purification result, which can reduce the inhibitory effect of impurities on the main product, improve the overall yield of isopentylene purification, and maximize the purity of isopentylene. At the same time, it can reduce ineffective energy consumption and operation time, improve production efficiency and raw material utilization, and reduce production costs. The high-efficiency extraction and purification treatment refers to the process of extracting and purifying isopentylene using the automatic solvent extraction device, the high-efficiency distillation separator, the impurity recovery unit and the dynamic distillation switching mechanism. The high-efficiency extraction and purification result refers to the final product obtained after extracting and purifying isopentylene from the raw material through the high-efficiency extraction and purification technology, such as the purity of the purified compound reaches 98%.

[0205] See Figure 2As shown, it is a process flow chart of an efficient method for extracting and purifying isoprene provided by one embodiment of the present invention. In this embodiment, through the process sequence and the functions of each tower in the figure, combined with the physical and chemical properties of isoprene and impurities, it can assist in determining the appropriate operating temperature, pressure and other parameters of each tower. For example, the light component removal tower needs to vaporize and separate the light components at relatively low temperature and pressure. By analyzing the process chart, the parameter ranges of different towers can be clarified, providing direction for parameter debugging and control in actual production.

[0206] Compared with the problems described in the background technology, the embodiments of the present invention screen out an effective solvent combination for the piperylene and the other impurities based on the basic physicochemical properties, thereby optimizing the solvent ratio, reducing the subsequent distillation load, and reducing the number of solvent cycles and losses. Furthermore, the embodiments of the present invention analyze the degree of extractability of the other impurities by the effective solvent combination to determine the solubility limit of the impurities in the solvent phase, thereby avoiding failure of the solvent system due to excessive dissolution of impurities. The embodiments of the present invention set up an automatic solvent extraction device for the piperylene and the other impurities according to the effective solvent combination and the degree of extractability. It can ensure that piperylene and impurities are efficiently separated in the extraction phase, reduce the residue of the target product in the impurity phase, and improve the yield of piperylene; further, the embodiment of the present invention sets the gradient distillation temperature of piperylene and the other impurities based on the pyrolysis characteristics and the gas-liquid equilibrium data, thereby enhancing the separation efficiency of piperylene and impurities and reducing invalid heat energy consumption; the embodiment of the present invention configures a high-efficiency distillation separator for piperylene and the other impurities by utilizing the gradient distillation temperature and the relative volatility determined by the gas-liquid equilibrium data, thereby accurately controlling the temperature and pressure distribution in the distillation tower, and realizing the separation of piperylene and other impurities. Effective separation of impurities improves product quality; further, the embodiment of the present invention performs a preliminary purification treatment on the piperylene based on the high-efficiency distillation separator to obtain preliminary purified piperylene, which can improve the purity and yield of piperylene and reduce energy consumption and production costs; the embodiment of the present invention can help locate the purification defects of piperylene by detecting the residual impurities in the preliminary purified piperylene, ensure that the product meets the standards, and create a dynamic distillation switching mechanism for the piperylene based on the residual impurities, which can adjust the distillation strategy in real time to ensure that no matter how the raw materials change, the purification effect can be maintained by flexibly switching the process mode; further, The embodiment of the present invention creates an impurity recovery unit for the piperylene based on the residual impurities, thereby improving resource utilization and optimizing the operating efficiency of the distillation system. Finally, the embodiment of the present invention performs an efficient extraction and purification process of the piperylene by combining the automatic solvent extraction device, the efficient distillation separator, the impurity recovery unit, and the dynamic distillation switching mechanism to obtain an efficient extraction and purification result, which can reduce the inhibitory effect of impurities on the main product, improve the overall yield of piperylene purification, and maximize the purity of piperylene. At the same time, it can reduce ineffective energy consumption and operation time, improve production efficiency and raw material utilization, and reduce production costs. Therefore, the efficient piperylene extraction and purification method and system provided by the embodiment of the present invention can improve the purity and yield of piperylene.

[0207] Example 2:

[0208] See Figure 3FIG. 1 is a functional module diagram of a high-efficiency piperylene extraction and purification system provided by one embodiment of the present invention.

[0209] The efficient piperylene extraction and purification system 200 described in the present invention can be installed in an electronic device. Depending on the functionality to be implemented, the system can include a candidate solvent identification module 201, an automatic extraction module 202, a gradient temperature setting module 203, a distillation configuration module 204, an impurity recovery module 205, and a purification execution module 206. A module, also referred to as a unit, refers to a series of computer program segments that can be executed by an electronic device processor and perform a fixed function, and is stored in the electronic device's memory.

[0210] In the embodiment of the present invention, the functions of each module / unit are as follows:

[0211] The candidate solvent identification module 201 is used to obtain piperylene and other impurities in the raw material, analyze the basic physicochemical properties of piperylene and the other impurities, and screen out effective solvent combinations for piperylene and the other impurities based on the basic physicochemical properties;

[0212] The automatic extraction module 202 is used to analyze the extractability of the other impurities by the effective solvent combination, and to set an automatic solvent extraction device for the piperylene and the other impurities based on the effective solvent combination and the extractability;

[0213] The gradient temperature setting module 203 is configured to analyze the pyrolysis characteristics of piperylene according to the basic physicochemical characteristics, collect vapor-liquid equilibrium data of piperylene and the other impurities, and set the gradient distillation temperature of piperylene and the other impurities based on the pyrolysis characteristics and the vapor-liquid equilibrium data;

[0214] The distillation configuration module 204 is configured to configure a high-efficiency distillation separator for separating the piperylene and the other impurities using the gradient distillation temperature and the relative volatility determined by the vapor-liquid equilibrium data, and perform a preliminary purification treatment on the piperylene using the high-efficiency distillation separator to obtain preliminarily purified piperylene;

[0215] The impurity recovery module 205 is used to detect the residual impurities in the preliminarily purified piperylene and establish a dynamic distillation switching mechanism and an impurity recovery unit for the piperylene based on the residual impurities;

[0216] The purification execution module 206 is used to combine the automatic solvent extraction device, the high-efficiency distillation separator, the impurity recovery unit and the dynamic distillation switching mechanism to perform the high-efficiency extraction and purification process of piperylene to obtain a high-efficiency extraction and purification result.

[0217] In detail, the modules in the high-efficiency piperylene extraction and purification system 200 described in the embodiment of the present invention are used in the same manner as described above. Figure 1 The same technical means as the efficient isopentadiene extraction and purification method described in , and can produce the same technical effects, will not be repeated here.

[0218] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0219] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A high-efficiency piperylene extraction and purification method, characterized in that: The method comprises: Obtaining piperylene and other impurities in the raw material, analyzing basic physicochemical properties of the piperylene and the other impurities, and screening an effective solvent combination for the piperylene and the other impurities based on the basic physicochemical properties; Analyzing the extractability of the other impurities by the effective solvent combination, and setting an automatic solvent extraction device for the piperylene and the other impurities based on the effective solvent combination and the extractability; Analyzing the pyrolysis characteristics of piperylene according to the basic physicochemical characteristics, collecting vapor-liquid equilibrium data of piperylene and the other impurities, and setting a gradient distillation temperature for piperylene and the other impurities based on the pyrolysis characteristics and the vapor-liquid equilibrium data; configuring a high-efficiency distillation separator for separating the piperylene and the other impurities using the gradient distillation temperature and the relative volatility determined by the vapor-liquid equilibrium data, and performing a preliminary purification treatment on the piperylene based on the high-efficiency distillation separator to obtain preliminarily purified piperylene; detecting residual impurities in the preliminarily purified piperylene, and establishing a dynamic distillation switching mechanism and an impurity recovery unit for the piperylene based on the residual impurities; By combining the automatic solvent extraction device, the high-efficiency distillation separator, the impurity recovery unit and the dynamic distillation switching mechanism, the high-efficiency extraction and purification process of piperylene is performed to obtain a high-efficiency extraction and purification result.

2. A high-efficiency piperylene extraction and purification method according to claim 1, characterized in that: The effective solvent combination of piperylene and the other impurities is screened out based on the basic physicochemical properties, including: Based on the basic physicochemical properties, determining the solubility data of the piperylene and the other impurities in different solvents; Calculating the dynamic relative selectivity coefficient of piperylene and the other impurities using the solubility data; selecting candidate solvents for piperylene and the other impurities according to the dynamic relative selectivity coefficient; performing a multi-channel parallel extraction process of the candidate solvent based on the piperylene and the other impurities to obtain a multi-channel solvent extraction result; identifying the extraction rate and extraction equilibrium time of the candidate solvent from the multi-channel solvent extraction results; According to the extraction rate and extraction equilibrium time, an effective solvent combination of the piperylene and the other impurities is screened out.

3. A high-efficiency piperylene extraction and purification method according to claim 1, characterized in that: The analyzing the extractability of the other impurities by the effective solvent combination comprises: Extracting the molecular structures corresponding to the other impurities and the classified solvents in the effective solvent combination and their corresponding solvent properties; Analyzing the interaction pattern between the other impurities and the classified solvents based on the molecular structure and the properties of the solvent; identifying the extraction efficiency of the other impurities based on the interaction pattern; Collecting extraction experimental data of the other impurities according to the extraction efficiency; Retrieving the unique identifier corresponding to the classified solvent, and constructing a correlation mapping network between the extraction experimental data, the unique identifier, and the molecular structure; Based on the association mapping network, identifying association IDs of the effective solvent combination and the other impurities; Analyzing the optimal solvent ratio of the effective solvent combination and the other impurities according to the correlation ID and the extraction efficiency; The optimal solvent ratio is used to analyze the extractability of the other impurities by the effective solvent combination.

4. A high-efficiency piperylene extraction and purification method according to claim 1, characterized in that: The automatic solvent extraction device for piperylene and other impurities is provided according to the effective solvent combination and the extractability, comprising: configuring an extraction device for the piperylene and the other impurities according to the effective solvent combination and the extractability; identifying the temperature sensitivity of the piperylene based on the effective solvent combination; Determining the solubility of piperylene in a preset temperature sensitive range according to the temperature sensitivity to set adaptive temperature control parameters of the extraction device; Using the selectivity coefficient of the piperylene to the other impurities, identifying the main solvent and the auxiliary solvent of the effective solvent combination, and setting the automatic solvent maintenance ratio of the main solvent and the auxiliary solvent; collecting concentration data of the other impurities in real time to calculate the concentration change rate of the impurity concentration; creating a concentration feedback control mechanism for the other impurities according to the concentration change rate; Analyzing the mutual solubility and hot melting properties of the effective solvent combination, and creating a personalized solvent recovery method for the extraction device based on the mutual solubility and hot melting properties; In combination with the adaptive temperature control parameters, the automatic solvent maintenance ratio, the concentration feedback control mechanism and the personalized solvent recovery method, an automatic solvent extraction device for the piperylene and the other impurities is set.

5. A high-efficiency piperylene extraction and purification method according to claim 1, characterized in that: The step of setting the gradient distillation temperature of piperylene and the other impurities based on the pyrolysis characteristics and the vapor-liquid equilibrium data comprises: Based on the pyrolysis characteristics, collecting pyrolysis data of the piperylene and identifying the pyrolysis starting temperature of the piperylene; Calculating the temperature constraint upper limit of the piperylene according to the pyrolysis starting temperature; Determining the decomposition temperature range of the other impurities using the pyrolysis data; creating independent temperature control units for the piperylene and the other impurities based on the decomposition temperature range and the temperature constraint upper limit, and defining a temperature safety threshold for the independent temperature control unit; identifying a vapor-liquid equilibrium state of the piperylene and the other impurities using the vapor-liquid equilibrium data; setting adaptive temperature parameters for the piperylene and the other impurities according to the gas-liquid equilibrium state; The gradient distillation temperature of the piperylene and the other impurities is set in combination with the independent temperature control unit, the temperature safety threshold and the adaptive temperature parameter.

6. A high-efficiency piperylene extraction and purification method according to claim 1, characterized in that: The method of configuring a high-efficiency distillation separator for separating piperylene and other impurities using the relative volatility determined by the gradient distillation temperature and the vapor-liquid equilibrium data comprises: Based on the gradient distillation temperature, constructing a distillation temperature curve of the piperylene and the other impurities; Identifying a temperature inflection point in the distillation temperature curve and dividing the piperylene and the other impurities into segmented temperature control units based on the temperature inflection point; According to the relative volatility, an adaptive gas-liquid equilibrium device is provided for the piperylene and the other impurities; Based on the segmented temperature control unit, constructing a visual temperature distribution interface of the piperylene and the other impurities; Identifying the easily pyrolyzed area of ​​the segmented temperature control unit through the visual temperature distribution interface; Setting a dynamic response channel for piperylene and other impurities in the pyrolysis-prone region; In combination with the segmented temperature control unit, the visual temperature distribution interface, the adaptive gas-liquid equilibrium device and the dynamic response channel, a high-efficiency distillation separator for separating piperylene and the other impurities is configured.

7. A high-efficiency piperylene extraction and purification method according to claim 1, characterized in that: The method of performing preliminary purification treatment on the piperylene based on the high-efficiency distillation separator to obtain preliminary purified piperylene comprises: Inputting a purification target for piperylene and generating optimal purification parameters for piperylene based on the purification target; According to the optimal purification parameters, an irregular temperature field of piperylene is generated by using a segmented temperature control unit of the high-efficiency distillation separator; Obtaining a temperature distribution matrix and a component concentration vector of the high-efficiency distillation separator under the irregular temperature field; Setting the result output condition of piperylene by the temperature distribution matrix and the component concentration vector; When the result output condition meets the preset output condition, the preliminary purified piperylene is output.

8. A high-efficiency piperylene extraction and purification method according to claim 1, characterized in that: The method of creating a dynamic distillation switching mechanism for piperylene based on the residual impurities comprises: identifying an impurity concentration and an impurity characteristic of the residual impurities; analyzing a concentration evolution trend of the impurity concentration, and identifying an abnormal pattern and abnormal duration of the residual impurities based on the concentration evolution trend; Based on the impurity characteristics, setting a correction unit for the abnormal mode; identifying an abnormal level of the residual impurities based on the impurity concentration and the abnormality duration; Setting the gradient switching parameters of piperylene according to the abnormality level and the impurity concentration; According to the gradient switching parameters, a multi-tower coordinated switching architecture for piperylene is created; Collecting the distillation parameters of piperylene in the multi-tower coordinated switching architecture, and constructing a dynamic knowledge graph of the impurity characteristics and the distillation parameters; Based on the dynamic knowledge graph, defining adaptive switching rules of the multi-tower collaborative switching architecture; According to the multi-tower coordinated switching architecture, the adaptive switching rules and the correction unit, a dynamic distillation switching mechanism for piperylene is established.

9. A high-efficiency piperylene extraction and purification method according to claim 1, characterized in that: The method of creating an impurity recovery unit for piperylene based on the residual impurities comprises: Identifying the impurity type of the residual impurities and analyzing the value density of the residual impurities based on the impurity type; Based on the value density, setting a graded recovery path for the residual impurities; analyzing the synergistic effects of the residual impurities according to the impurity types and identifying the classification effects of the synergistic effects; Setting a recycling priority of the residual impurities based on the value density and the synergistic effect; calculating an intensity coefficient of the synergistic effect, and constructing a dynamic compensation mechanism for the synergistic effect based on the intensity coefficient; defining adaptive recovery parameters for the residual impurities based on the dynamic compensation mechanism; The impurity recovery unit of piperylene is created by combining the graded recovery path, the adaptive recovery parameters and the recovery priority.

10. An efficient piperylene extraction and purification system, characterized in that: The system comprises: a candidate solvent identification module for obtaining piperylene and other impurities in the raw material, analyzing the basic physicochemical properties of the piperylene and the other impurities, and screening effective solvent combinations for the piperylene and the other impurities based on the basic physicochemical properties; an automatic extraction module, configured to analyze the extractability of the other impurities by the effective solvent combination, and to set an automatic solvent extraction device for the piperylene and the other impurities based on the effective solvent combination and the extractability; a gradient temperature setting module, configured to analyze the pyrolysis characteristics of piperylene according to the basic physicochemical characteristics, collect vapor-liquid equilibrium data of piperylene and the other impurities, and set a gradient distillation temperature for piperylene and the other impurities based on the pyrolysis characteristics and the vapor-liquid equilibrium data; a distillation configuration module, configured to configure a high-efficiency distillation separator for separating the piperylene and the other impurities using the gradient distillation temperature and the relative volatility determined by the vapor-liquid equilibrium data, and to perform a preliminary purification treatment on the piperylene using the high-efficiency distillation separator to obtain preliminarily purified piperylene; An impurity recovery module, configured to detect residual impurities in the preliminarily purified piperylene and, based on the residual impurities, establish a dynamic distillation switching mechanism and an impurity recovery unit for the piperylene; The purification execution module is used to combine the automatic solvent extraction device, the high-efficiency distillation separator, the impurity recovery unit and the dynamic distillation switching mechanism to perform the high-efficiency extraction and purification process of the isoprene to obtain a high-efficiency extraction and purification result.

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