25 results about "Rates reactions" patented technology

The invention relates to the technical field of nano particle heterogeneous reaction kinetic research, in particular to a nano single particle reaction rate measuring system and method based on optical surface wave dark field imaging. The method comprises the following steps: preparing a nano single particle sample; the humidity of the environment where the nano single particles are located is adjusted; starting a heterogeneous reaction of the nano single particulate matter, performing in-situ dark field imaging on the nano single particulate matter in the reaction process, and collecting scattering hot spot imaging data under different reaction times and different humidity; and based on the acquired imaging data, the reaction rate of the nano single particulate matter is inversed in combination with a kinetic model. According to the invention, the defects in the existing nano-particle reaction rate measurement technology can be overcome, and the reaction rate of a single particle as low as 50 nanometers in the heterogeneous reaction process can be accurately measured and inverted under the high-humidity standard atmospheric pressure condition.

The invention provides a device for preparing pentaerythritol through continuous condensation reaction and a reaction method thereof. The device comprises an enhanced reaction tower and a plug flow reactor which are connected in sequence, wherein a strengthening unit is arranged at the bottom in the strengthening reaction tower, an acetaldehyde feeding hole is formed in the lower part of the strengthening reaction tower, and the acetaldehyde feeding hole is formed in the lower part of the strengthening unit; an alkali liquor feeding hole, a formaldehyde feeding hole and a circulating feeding hole are sequentially formed in the upper part of the enhanced reaction tower from top to bottom; a discharge hole is formed in the bottom of the enhanced reaction tower; a spray layer is arranged at the top in the enhanced reaction tower, the spray layer is connected with the alkali liquor feed port, a liquid level sensor is arranged below the spray layer, and the liquid level sensor is arranged at a position 0.2-2 m below the spray layer; preferably, the liquid level sensor is arranged at the position 0.8 m below the spraying layer. According to the device disclosed by the invention, reactants are continuously fed, and products are continuously produced, so that the reaction rate is obviously accelerated.

The invention discloses a dynamic behavior analysis method and system for kiln high-temperature synthesis, and relates to the technical field of high-temperature material synthesis monitoring, and the method comprises the steps: obtaining time sequence data through a high-frequency temperature sensor, a reaction intermediate detector and a flue gas component monitor, and carrying out the feature extraction; the micro-scale adopts molecular dynamics simulation to obtain local reaction dynamic behaviors, and the macro-scale simulates kiln temperature distribution based on a finite element method; fusing the feedback relationship between the local reaction rate and the temperature distribution by using multi-scale coupling; dividing the high-temperature synthesis process of the kiln into a plurality of continuous recognizable states, judging whether a state jump condition is met or not, and performing multi-objective optimization iteration to obtain a dynamic behavior analysis result and phase change stage judgment. According to the method, dynamic feedback of the reaction rate and the temperature field is realized, key inflection points and phase change characteristics can be accurately captured, the fitting precision of kinetic parameters is remarkably improved, and the robustness and the adaptive capacity of the model are enhanced.

The invention relates to the field of spiral conveying equipment, in particular to a spiral conveyor for perchloric acid production, and solves the problems that the internal temperature of the spiral conveyor is uniform, the phenomenon that the stability and efficiency of the whole reaction process are affected due to the fact that the reaction rates of different parts are inconsistent is avoided, and the stirring angle can be adjusted so as to adapt to different reaction rates. Comprising a conveying pipe and a driving motor, the outer wall of the conveying pipe is slidably connected with a sliding plate, and the sliding plate is connected with the output end of the driving motor. The phenomenon that water drops on the outer wall of the conveying pipe are hung on the wall unevenly can be avoided, the phenomenon that the reaction rates of all areas are different due to the difference of the internal temperature is prevented, the driving motor can synchronously drive the sliding plate to scrape the outer wall of the conveying pipe when driving the spiral shaft to conduct spiral conveying, the situation that heat dissipation is affected by water drop gathering is avoided, and the service life of the conveying pipe is prolonged. And meanwhile, automatic adjustment can be performed through the stirring blades, so that stirring at different reaction rates is met.

The invention discloses a machine learning assisted acetic acid reaction rate prediction model training method and device and a prediction method. The machine learning assisted acetic acid reaction rate prediction model training method comprises the following steps: acquiring an enhanced data training set; extracting a training feature vector of the enhanced data training set; obtaining a classification promotion regression model for the acetic acid reaction rate; and training the classification lifting regression model for the acetic acid reaction rate through the feature vectors for training so as to obtain the trained classification lifting regression model for the acetic acid reaction rate. According to the method, a model relationship between input characteristics and acetic acid reaction rates (including reactant mass, catalyst mass, methyl acetate concentration and the like) is established through training set learning. A user can directly obtain the prediction result of the acetic acid reaction rate by inputting the characteristic variables.

The application relates to the field of carbon dioxide resource utilization, and discloses a numerical simulation method, device and equipment for a carbon dioxide resource utilization reaction, wherein the method comprises the following steps: a flow field simulation model and a reaction simulation model of the carbon dioxide resource utilization reaction are established; reaction component concentration and a reaction rate are obtained; based on the reaction component concentration, the flow field simulation model is analyzed in a steady state to determine stable flow field data of the resource utilization reaction; based on the reaction rate and the stable flow field data, equivalent stable time of the resource utilization reaction is determined; based on the reaction rate and the equivalent stable time, the reaction component concentration is corrected; based on the corrected reaction component concentration and the stable flow field data, the reaction simulation model is analyzed in a transient state until the resource utilization reaction ends, so that a numerical simulation result of the resource utilization reaction process is obtained. The technical scheme provided by the application can improve the simulation accuracy and simulation efficiency of the numerical simulation process for carbon dioxide resource utilization.

The present invention discloses an amination reaction device for the synthesis of benzonitrile products, which relates to the field of benzonitrile product production. The device includes a reaction kettle, a bracket and a motor. A bracket is fixed at the upper end of the reaction kettle, and a motor is fixed on the bracket. A driving gear and a stirring mechanism are fixed on the output shaft of the motor. The stirring mechanism includes a cylinder, which is fixed on the output shaft of the motor. The output end of the cylinder is fixed with a driving rubber wheel, and a movable block is connected to the lower end of the driving rubber wheel through a bearing. The amination reaction device for the synthesis of benzonitrile products adopts a stirring mechanism with automatic speed regulation, which can not only adjust the stirring speed of the materials according to the actual mixing requirements of different products, improve the adaptability of the device, but also reduce the stirring speed when the temperature in the reaction kettle is too high or the pressure is too large during the amination reaction of the same product, so as to reduce the reaction rate of the raw materials and ensure the normal operation of the device.

The invention provides a method for detecting impurities in a reaction process of N-(carbobenzoxy)-L-tyrosine methyl ester, which comprises the following steps: in the reaction process of the N-(carbobenzoxy)-L-tyrosine methyl ester, if a plurality of other unknown substances are generated if the feeding proportion, the temperature, the dripping speed and the like are not controlled well, the impurities are detected to be detected; unknown impurities generated in the process have certain influence on the purity of a sample, production equipment can completely remove reaction raw materials or degradation products, but the impurity removal capacity is limited for a small amount of generated impurities which are equivalent to main products in property, and the production equipment can be used for improving the reaction rate, exploring the optimal reaction conditions and monitoring other impurities generated in the reaction process. And performing qualitative analysis on impurities, and performing auxiliary detection by using a high performance chromatography-ultraviolet detection method. The detection method has the advantages of high sensitivity, almost no detection interference, good accuracy, short analysis time and the like, and can effectively overcome the defects in the prior art. The method can be used for detecting the reaction process of N-(carbobenzoxy)-L-tyrosine methyl ester and related substances of the product.

The invention relates to the technical field of micro-channel reaction, and discloses a micro-channel reaction structure and a heat exchange device.The micro-channel reaction structure comprises a reaction shell, and a liquid inlet runner, a liquid outlet runner and a plurality of mixing runner units connected in sequence are formed in a reaction plate; the plurality of mixing flow channel units are sequentially connected to form the 8-shaped mixing channel, and the cross flow guide structures arranged in the mixing flow channel units can introduce continuous disturbance in the flowing process of fluids, so that the transverse mixing among the fluids is obviously enhanced, and the mixing efficiency is improved; by improving the flow field structure in the micro-channel, more sufficient mixing and more efficient mass transfer are realized, so that the reaction rate is increased, the conversion efficiency and yield of the product are improved, and the micro-channel is suitable for various micro-reaction processes requiring accurate control of reaction conditions.

The application provides a measuring device and a measuring method for interfacial reaction intrinsic kinetics. The measuring device for interfacial reaction intrinsic kinetics comprises a reaction disc, the reaction disc is provided with a reaction channel, a first liquid inlet channel, a second liquid inlet channel, a first liquid outlet channel and a second liquid outlet channel, the first liquid inlet channel and the second liquid inlet channel are communicated with the inlet of the reaction channel, and the first liquid outlet channel and the second liquid outlet channel are communicated with the outlet of the reaction channel; a centrifugal driving member is connected with the reaction disc to drive the rotation of the reaction disc; a first conveying pump is used for conveying a first fluid to the first liquid inlet channel; a second conveying pump is used for conveying a second fluid to the second liquid inlet channel; a first collecting device is used for collecting the reacted first fluid; and a second collecting device is used for collecting the reacted second fluid. The measuring device for interfacial reaction intrinsic kinetics can decouple the mass transfer and the reaction rate in a heterogeneous reaction, so that the interfacial intrinsic reaction rate is obtained.

A technology is provided for automatically conducting a reaction rate test under the same flow conditions while varying the residence time in catalyst beds. In this test device for conducting a reaction rate test for a chemical reaction proceeding in the presence of a catalyst, sample supply units 31 and 411 supply a sample to be supplied to catalyst at a preset flow rate, and a plurality of reaction vessels 2a to 2f each contain a catalyst bed filled with the catalyst. Supply-side switching valves 61, 62 connect supply flow paths through which the sample is supplied to the reaction vessel 2e, which is a supply destination, and an outflow-side switching valve 63 connects a sample flow path 701 for collecting the sample for analysis to the reaction vessel 2e, which is an outflow point where the sample drains from the catalyst bed.A control unit 11 performs switching control on the reaction vessels 2a to 2f, which are supply and discharge points, by means of the supply-side switching valves 61, 62 and the outlet-side switching valve 63 so that the reaction rate test is carried out under at least three sets of conditions with different residence times in the catalyst beds.

A testing apparatus and method are provided for automatically performing reaction rate tests while varying the residence time in a catalyst bed under the same flow conditions. In the testing apparatus for testing the reaction rate of a chemical reaction proceeding in the presence of a catalyst, a sample supply unit supplies a sample to the catalyst at a preset flow rate, and multiple reaction vessels each include a catalyst bed filled with the catalyst. A supply-side switching valve is connected to a supply flow path for the sample to be supplied to the reaction vessel that is the target of the supply, and an outflow-side switching valve is connected to a sample flow path for collecting samples for analysis to the reaction vessel that is the source of the outflow from the catalyst bed. A control unit controls the switching between the target and source reaction vessels via the supply-side and outflow-side switching valves, enabling reaction rate tests to be performed under at least three conditions with different residence times in the catalyst bed.

The application belongs to the field of computational theoretical chemistry, and discloses a method for rapidly predicting natural chemical connection reaction rate by using a machine learning model.The method comprises the following steps: firstly, synthesizing a series of peptide thioesters containing different thioester groups to construct a peptide thioester library; then, determining the natural chemical connection reaction rates of different peptide thioesters as sample labels; subsequently, analyzing the influence of structure on the reaction rate of the peptide thioester through quantum structure optimization to obtain the feature descriptor of each sample from the calculation simulation; finally, based on the feature descriptor and the sample label, a formula of structure-function relationship is summarized by using a computer learning algorithm, so that the influence of the structure of the peptide thioester on the natural chemical connection reaction rate can be rapidly predicted.The method greatly improves the work efficiency, the result is accurate, the reproducibility is good, and the method is convenient to popularize and apply.

The utility model provides an organic chemical reaction device and belongs to the technical field of organic chemical reaction devices. Comprising a bottom plate, an ultrasonic generator assembly is arranged on the left side of the top surface of the bottom plate, a reaction kettle assembly is arranged at the top of the ultrasonic generator assembly, a cleaning assembly is arranged on the right side of the top surface of the bottom plate, and one end of the cleaning assembly is connected with a filter pipe assembly. According to the ultrasonic enhanced reaction device disclosed by the utility model, the whole ultrasonic enhanced reaction device can be presented by arranging the ultrasonic generator, the ultrasonic generator is additionally arranged on the basis of a conventional reaction container, and the ultrasonic generator generates high-frequency mechanical vibration waves, converts the high-frequency mechanical vibration waves into ultrasonic energy through the transducer and transmits the ultrasonic energy to a reaction system. Molecular motion of reactants is accelerated, the reaction rate is increased, the reactants can be effectively dispersed, heterogeneous reaction is promoted, operation is simple, and integration with an existing reaction device is easy.

The application discloses a heat-triggered water-based carbodiimide crosslinking agent composition and application thereof. By introducing a latent acid and setting an alkaline environment during storage, the hydrolysis of carbodiimide and the pre-reaction of carbodiimide and carboxyl are simultaneously inhibited from the kinetic aspect, and the system is 'frozen' in a stable state. When used, the latent acid is triggered to decompose by heating, and the system pH is suddenly reduced to acidity by instantaneous release of protons, which not only quickly protonates and activates the carbodiimide, but also creates an optimal kinetic window in which the reaction rate of carbodiimide and carboxyl is much faster than the hydrolysis reaction, thereby accurately, synchronously and efficiently guiding the reaction path to the target crosslinking direction, and realizing the unification of'stable storage' and 'on-demand efficient reaction' in a single component.

The application discloses a mechanism-guided cascade reactor dynamic modeling and transfer learning method and device, and belongs to the technical field of chemical engineering and artificial intelligence, and comprises the following steps: residence time and input variables are taken as inputs of a reactor inlet, are processed through a reaction rate learning module, and finally the remaining reactant concentrations of different reaction microelements after corresponding residence time are obtained; flow and residence time are taken as input parameters and are input into a residence time distribution learning module; the module processes the parameters, and outputs the residence time probability distribution under the conditions of corresponding flow and residence time; the remaining reactant concentrations output by the reaction rate learning module and the corresponding probability distribution output by the residence time distribution learning module are subjected to weighted summation through a reactor output module, and finally the reactant concentration at the reactor outlet is obtained.

The utility model relates to the technical field of ethylene glycol hydrogenation reactors, in particular to an ethylene glycol hydrogenation reactor which comprises a device body, the device body is provided with a connecting mechanism, the connecting mechanism comprises connecting assemblies arranged on the two sides of the device body, and a reaction assembly is arranged in the middle of the device body. A filter assembly is arranged at the lower section of the device body, and the reaction assembly comprises a reaction tank fixedly mounted on the inner wall of the middle section of the device body. Through cooperation of a fixing sleeve, a hinged connecting rod, a limiting sliding block and a scraping plate, materials on the inner wall of the reaction tank can be scraped and swept, meanwhile, a rotating roller rolls in the materials, and all-directional and multi-angle stirring and mixing are achieved; the efficient stirring mode enables reactants to be in full contact, the reaction rate is remarkably increased, the uniformity and thoroughness of the reaction are improved, the quality and purity of products are improved, and compared with a traditional reactor, the problem that the stirring and mixing effect is poor is effectively solved.

The application discloses a kind of gas acceleration synthesis system and method for material preparation, belong to material preparation field, including gas source unit, raw material adding unit, acceleration chamber unit, reaction chamber unit, circulating chamber unit and collection chamber unit;The acceleration chamber unit, reaction chamber unit and circulating chamber unit are communicated to form circulation loop, and the gas source unit, raw material adding unit and collection chamber unit are communicated with circulation loop respectively;Its characterized in that: separation unit is further provided in circulation loop, and the separation unit is used to separate the particles in circulation loop;Large particles are transported to reaction chamber unit at low speed after separation, and small particles are transported into circulation loop again after separation;Product is collected by collection chamber unit;The application has the characteristics of fast reaction rate, high synthesis efficiency, environment-friendly and pollution-free, and has excellent application prospect.

A crosslinking reaction simulation device including: a heat transfer analysis unit configured to perform a heat transfer analysis during a crosslinking reaction of a polymer portion of a target work model; and a crosslinking reaction analysis unit configured to perform analysis of a reaction rate of a crosslinking reaction of the polymer portion, and the crosslinking reaction analysis unit includes a temperature acquisition unit that acquires, as a result of the heat transfer analysis, a temperature at each time for each element of the polymer portion of the target work model in the crosslinking reaction, and, a reaction rate calculation processing unit configured to calculate an equivalent reaction amount of the polymer portion at each time, and calculates the reaction rate of the crosslinking reaction of the polymer portion based on the calculated equivalent reaction amount.

The application discloses a MOCVD reaction unit and a MOCVD equipment, which comprises a base and a reaction shell; wherein, one side of the base is provided with a containing cavity, which is suitable for containing a wafer; the reaction shell is arranged on the side of the base provided with the containing cavity, and the reaction shell and the side surface of the base close to the reaction shell enclose a reaction cavity, and the containing cavity is communicated with the reaction cavity; the two ends of the reaction shell are respectively provided with a gas inlet and a gas outlet, which are used for allowing the reaction gas to enter and discharge the reaction cavity; the wafer surface is suitable for contacting the reaction gas in the reaction cavity, and the wafer is vertically arranged in the containing cavity, so that the particle products not adhered to the wafer can slide under the action of gravity, and the accumulation on the wafer is prevented. In the structure, the metal particles generated in the structure do not adhere to the wafer, and fall downward, and cannot be accumulated on the wafer, so that the cleanliness of the wafer surface is ensured, and the subsequent reaction rate and product quality are ensured.

The application discloses a reaction medium reaction speed control system for a closed space, which comprises a reaction container, a fixed sealing cylinder and a movable reaction rod; the movable reaction rod is movably inserted into the fixed sealing cylinder to extend into the reaction container; reaction medium outlet holes are distributed on the tube wall of the lower half of the tube body of the movable reaction rod; an upper sealing part and a lower sealing part are embedded on the fixed sealing cylinder; a middle sealing part is embedded on the outer periphery of the movable reaction rod; the upper sealing part and the lower sealing part are separated by the middle sealing part to form an upper gas clamping cavity and a lower liquid clamping cavity; the pressure P2 in the upper gas clamping cavity is adjusted to be different from the pressure P1 in the reaction container; the movable reaction rod moves up and down through the pressure difference to adjust the number of the outlet holes of the reaction medium outlet holes extending out of the fixed sealing cylinder. The application drives the movable reaction rod to move through the pressure difference between the reaction container and the upper gas clamping cavity to adjust the number of the outlet holes of the reaction medium outlet holes extending out of the fixed sealing cylinder, so that the reaction progress of the reaction medium in the closed space is effectively controlled.

The energy prediction device for a catalytic reaction according to the present invention comprises: a regression model generation unit that generates a regression model for predicting the energy of a three-dimensional structure on the basis of the three-dimensional structure of an intermediate body and a transition state of the reactant generated in a process of generating a product from a reactant by a catalytic reaction in which a plurality of elementary reactions progressing in stages are repeated, and the energy of the three-dimensional structure; and an energy prediction unit that predicts the energy of the three-dimensional structure using the regression model.

The application discloses a method for researching reaction mechanism of photosensitizer and ROS. 1 The application obtains reaction rate coefficients of photosensitizer and ·OH and O2, reaction mechanism of photosensitizer and ROS by computer software calculation. 1 The application obtains secondary reaction rate coefficients of photosensitizer and ·OH and O2, activation energy of reaction of photosensitizer and ·OH, reaction mechanism of photosensitizer and ·OH and life of photosensitizer by experiment. 1 The application obtains reaction mechanism of photosensitizer and ·OH and O2 by calculation and experiment, simulates and predicts reaction kinetics of photosensitizer and ROS in water environment, fills the blank of reaction mechanism of photosensitizer and ROS in water environment and provides basis for degradation evaluation of photosensitizer in environment.

The utility model belongs to the technical field of reaction kettles, and discloses an energy-saving reaction kettle for chlor-alkali electrolysis, which comprises a reaction bin body and a supporting bin sleeved at the bottom of the reaction bin body, a rotating rod is arranged in the reaction bin body and movably connected with the reaction bin body, a driving wheel and a motor are respectively arranged in the supporting bin, and the rotating rod is movably connected with the driving wheel. The driving wheel is connected with the bottom surface of the reaction bin body; the driving wheel is meshed with a driven wheel, the rotating direction of the driving wheel is opposite to that of the driven wheel, the motor drives the driving wheel to drive the reaction bin body to rotate, and meanwhile the driving wheel drives the driven wheel to drive the rotating rod to rotate reversely. According to the energy-saving reaction kettle for chlor-alkali electrolysis, the stirring speed can be increased, so that the problem that the electrolytic reaction speed is low due to the fact that materials cannot be fully mixed is solved.

The embodiment of the invention provides a method and equipment for predicting the product yield of a slurry bed residual oil hydrogenation process. The method comprises the following steps: acquiring a reactant lumped feeding flow, a hydrogen flow and reaction conditions; inputting the reactant set total feed flow, the hydrogen flow and the reaction conditions into a slurry bed residual oil hydrogenation process mechanism model to obtain the product set total flow after the reaction and the unreacted reactant set total flow; and determining the product yield of the slurry bed residual oil hydrogenation process according to the reactant set total feed flow, the reacted product set total flow and the unreacted reactant set total flow, the reactant set is divided according to the carbon number of reactants and DBE, and the reactant set total flow is divided according to the carbon number of the reactants and the DBE. The product set is always divided according to the hydrocarbon type or molecular structure of the product, and the model is used for calculating the product set according to the total feeding flow and hydrogen flow of the reactant set, reaction conditions and a reaction network established in the model on the basis of kinetic parameters of reaction family division and a reaction rate equation. And determining the total flow of the product set after the reaction and the total flow of the unreacted reactant set.