134 results about "Phase reaction" patented technology

The invention discloses a jet type micro-droplet generation device and a micro-droplet generation method thereof, and belongs to the technical field of liquid-liquid heterogeneous / homogeneous reaction devices. The device comprises an injection pipe, the injection pipe is used for conveying a first liquid phase, the interior of the injection pipe is of a cavity structure, the injection pipe comprises a feeding section, a mixing section, a diffusion section and a feeding pipe, the feeding section, the mixing section and the diffusion section are sequentially communicated and coaxially arranged, the feeding pipe is used for conveying a second liquid phase, and the feeding pipe penetrates through the side wall of the feeding section and extends into an inner cavity of the injection pipe; a discharging opening of the feeding pipe is formed in the mixing section, and an annular flowing space is formed by the outer wall of the feeding pipe and the inner wall of the mixing section. The feeding pipe extends into the mixing section to form an annular flowing space, and a second liquid phase is dispersed into small liquid drops by fully utilizing the annular space and a strong shear flow field in the mixing section. The method is suitable for a liquid-liquid heterogeneous / homogeneous system, including a liquid-liquid heterogeneous / homogeneous reaction crystallization system generated by solid particles.

The invention discloses an experimental system and method for accelerating and promoting a gas-liquid-solid three-phase reaction in a multi-stage manner, and relates to the technical field of reaction equipment and carbon emission reduction. The experiment system comprises: a reaction kettle provided with a visual window and an atomization device mounting groove; the floating type piezoelectric ceramic atomization device is embedded in the atomization device mounting groove; the gas injection device comprises a gas hole distribution pipe and a gas injection pump connected with the gas hole distribution pipe; uniformly distributed micropores are formed in the pore distribution pipe; the magnetic stirring device comprises a magnetic driving base, a rotating speed controller and a magnetic stirrer arranged in the reaction kettle; the magnetic stirrer is arranged above the air hole distribution pipe; the bracket net is arranged on one side, deviating from the air hole distribution pipe, of the magnetic stirrer; and the temperature control device comprises a constant-temperature bath and a temperature controller for controlling the temperature of the constant-temperature bath. The experimental system is compact in structural design, modularized, simple and convenient to operate, capable of efficiently accelerating the gas-liquid-solid three-phase reaction and suitable for various experimental studies.

The utility model relates to the technical field of vinyl chloride polymerization production, in particular to a safe feeding device of a solid-liquid-gas three-phase reaction kettle. The safe feeding device of the solid-liquid-gas three-phase reaction kettle comprises a reaction kettle and a pressure stabilizer, the pressure stabilizer is connected with a desulfurization tower through a deoxidation adsorption tower, the desulfurization tower is connected with the reaction kettle through a pre-heater, the reaction kettle is connected with a feeding tank, a temperature control coil pipe is arranged in the reaction kettle and connected with a refrigerating machine through a pipeline, and the refrigerating machine is connected with the deoxidation adsorption tower through a pipeline. And a pre-heating device coil pipe is arranged in the pre-heating device. According to the device, through the cooperative use of the heating sleeve, the connecting pipeline and the pre-heating device coil pipe, the waste heat of the reaction kettle is used for pre-heating a gas-phase raw material, so that the feeding temperature is ensured to reach a proper range, and the influence on the temperature in the reaction kettle due to the too low feeding temperature is avoided, thereby ensuring that a polymerization reaction can be carried out under a stable temperature condition; and the stability of product quality is improved.

The invention belongs to an amide intermediate treatment device and method for hydrazine hydrate production. Comprising a concentration tank, the concentration tank is provided with a water-phase reaction liquid inlet pipeline and a catalyst inlet, the catalyst inlet is connected with a quartz sand catalyst preparation unit, an outlet of the concentration tank is connected with a concentrated material inlet of an intermediate recovery kettle, and the intermediate recovery kettle is further connected with an ammonia feeding pipeline. An ammoniation liquid outlet of the intermediate recovery kettle is connected with a separation and recovery unit, and a liquid phase outlet of the separation and recovery unit is connected with a hydrazine compound synthesis section; a steam discharge pipeline is arranged at the top of the concentration tank; the method has the advantages that moisture in the water-phase reaction liquid can be removed, ammonium formate is converted into formamide and recycled, meanwhile, metal ions are prevented from being contained in ammoniation liquid, and further, the treatment cost is reduced and continuous treatment is achieved on the basis of energy conservation and consumption reduction.

The application relates to the technical field of gas-liquid two-phase mixing, and discloses a multiphase reaction system and a multiphase reaction method, the system comprising a mixer and a reactor; wherein the mixer comprises a liquid flow guide pipe 1, a gas-liquid mixing pipe 2 and a gas cavity 3; wherein the liquid flow guide pipe 1 comprises a straight pipe section and a reduced diameter section, the reduced diameter section is connected with the gas-liquid mixing pipe 2; the gas-liquid mixing pipe 2 is connected with the reactor through the gas cavity 3. The multiphase reaction system provided by the application can make the gas phase contact with the liquid phase in the form of micro-bubbles, and can continuously provide micro-bubbles, thereby strengthening the gas-liquid two-phase mass transfer process and improving the reaction rate, and can be applied in liquid phase hydrogenation technology, and is especially suitable for hydrocarbon oil hydrogenation.

This invention discloses a polyaniline-modified Pt / C hydrogen evolution electrode with low noble metal loading, its preparation, and its application. The hydrogen evolution electrode comprises: a carbon fiber layer; a carbon powder layer containing polyaniline, perfluorosulfonic acid resin, and carbon powder; a polyaniline nanofiber layer; and a catalyst layer containing polyaniline, a Pt / C catalyst, and perfluorosulfonic acid resin. Each layer promotes electron or proton conduction, ensuring that both can smoothly reach the three-phase reaction region to participate in the hydrogen evolution reaction. Simultaneously, each layer has high porosity, ensuring timely drainage of the hydrogen evolution reaction product liquid water and avoiding flooding. The second, third, and fourth layers all contain polyaniline as a catalyst to promote the hydrogen evolution reaction, with the catalyst content distributed from low to high, ensuring that the hydrogen evolution reaction proceeds in stages and avoiding excessively fast local reaction rates that could cause concentration polarization and lead to a decrease in electrolysis performance. The hydrogen evolution overpotential of the polyaniline-modified Pt / C hydrogen evolution electrode of this invention is superior to that of the traditional Pt / C electrode, thus promoting the hydrogen evolution reaction.

The application discloses a preparation method and application of a multi-phenyl phosphorus oxide compound and belongs to the technical field of organic synthesis. Different properties of raw materials are respectively dissolved through double solvents, a catalyst is added into the system, and the entering of the alkali metal salt reactant into the organic phase reaction is helped to be dissolved to obtain a molecular level reactant, so that the reaction is promoted to be completely carried out, the yield of a product is improved, the proportion of impurities, such as the reactant, contained in the product is reduced, the purity of the product is improved, and the high-purity product is a material with low dielectric property. The material is tested in various performances, and excellent flame retardance and low dielectric constant are obtained.

The invention relates to a process for producing phosgene by gas-phase reaction of carbon monoxide and chlorine in the presence of a catalyst in a reactor which comprises a plurality of parallel catalyst tubes which are filled with the catalyst and around which at least one fluid heat transfer medium flows, where a feed stream of a mixture of a chlorine input stream and a carbon monoxide input stream is fed into the catalyst tubes and is allowed to react to give a phosgene-comprising product gas mixture, wherein the reaction is carried out at an area load of more than 2.75 kg of phosgene / m2s. The invention also provides a reactor for carrying out the process.

This invention discloses a catalytic reactive distillation unit, apparatus, and method. The catalytic reactive distillation unit includes: a reaction mass transfer channel, the upper end of which receives low-temperature liquid-phase reactants flowing downwards, and the lower end of which receives high-temperature gas phase flowing upwards; the reaction mass transfer channel contains a catalyst layer and a packing layer, with the catalyst layer positioned above the packing layer, and a first space between them; and a rising gas bypass, located outside the reaction mass transfer channel and connected to the first space. The liquid-phase products after the catalytic reaction merge with the high-temperature gas phase in the packing layer and undergo gas-liquid mass transfer. The rising gas phase after mass transfer carries the light components from the liquid-phase products into the rising gas bypass, completing mass transfer separation. This invention, through the setting of the rising gas bypass, not only increases the gas phase flow rate and effectively reduces the pressure drop within the reaction mass transfer channel, but also effectively solves the space occupation problem of the equipment. This invention can clean the blockage of the catalyst filter without additional power and can realize online replacement of the catalyst and / or packing.

The present application relates to the field of liquid-liquid two-phase reaction, and discloses a kind of liquid-liquid two-phase reaction method, liquid-liquid two-phase reaction device and application, the method includes: in the one side of permeation medium and set up the first region containing first reactant, in the other side of permeation medium and set up the second region containing second reactant;The pressure P1 of setting the first region is less than the pressure P2 of the second region;Under the action of pressure difference between pressure P1 and pressure P2, the second reactant passes through the permeation medium, contacts the first reactant and reacts;The first reactant is the first liquid phase reactant, and the second reactant is the second liquid phase reactant.The method provided by the present application controls the suction force between the two-phase reaction zone, and then controls the reaction speed, ensures that the reactants are efficiently mixed and reacted, shortens the total reaction time, does not need to dilute the reactants by a large multiple, effectively reduces the cost of reactant materials, and improves the reaction efficiency.

The invention relates to the technical field of liquid-liquid reaction, is suitable for chemical reaction of gas generated by liquid-liquid reaction, and particularly discloses a liquid-liquid two-phase reaction device which comprises a reaction tube, a feeding tube is mounted at the top of the reaction tube, and a first reactor is arranged in the reaction tube and located below the feeding tube. Continuous reaction discs are arranged in a tube body below the first reactor in the reaction tube in a staggered manner; reaction liquid is continuously introduced into the feeding pipe, so that the reaction liquid overflows out of the first reactor and then enters the continuous reaction disc for step-by-step reaction; a gas outlet is formed in the top of the reaction tube and is used for discharging a gas product generated by reaction; and the bottom is provided with a waste liquid outlet for discharging reacted waste liquid. The number of the feed ports can be adjusted according to liquid types, and the reaction kettle is suitable for reaction of various liquids; the first reactor and the continuous reaction disc are designed in the reaction tube, so that the reaction efficiency and the product purity are improved; a waste liquid outlet is formed in the lower part of the reaction tube, so that the reaction can be continuously carried out and the experiment efficiency is improved.

The invention belongs to the technical field of organic synthesis, and particularly relates to a preparation method of a pyrrolopyrimidine-4-amine derivative, which selects methanol, ammonium formate and formic acid as a reaction system to carry out directional reaction, avoids the use of high-pressure hydrogen and a high-pressure kettle, avoids the safety risk caused by high-pressure operation, and improves the yield of the pyrrolopyrimidine-4-amine derivative. And the alcoholic solution solves the problems of low solubility and obvious amplification effect of a starting material when water is used as a solvent in the prior art, and realizes homogeneous reaction. By adopting the fixed bed reaction unit, the problem of pipeline blockage caused by sublimation of ammonium formate is solved, the potential safety hazard in large-scale production is eliminated, the fixed bed reaction unit is used for continuous catalytic reaction to replace the traditional staged reaction, the production period is remarkably shortened, the production efficiency is improved, and the method is suitable for large-scale industrial production.

The invention provides a production method of lanthanum zirconate, and belongs to the technical field of inorganic non-metallic materials. According to the invention, an electric smelting method is adopted, during high-temperature smelting, a zirconia material and lanthanum oxide / lanthanum carbonate are fully subjected to a high-temperature liquid phase chemical reaction at high temperature, an all-La2Zr2O7-phase electric smelting lanthanum zirconate product can be obtained, and the all-La2Zr2O7-phase electric smelting lanthanum zirconate product can be processed into particle size sand and fine powder with various particle sizes or can be processed into crushing and grading powder for a high-temperature thermal barrier coating material according to the requirements of users. Compared with a La2Zr2O7 material prepared by a solid-phase reaction method, a precipitation method, a sol-gel method, a self-propagating combustion method, a hydrothermal synthesis method and the like, the lanthanum zirconate prepared by the method provided by the invention is high in volume density and low in porosity, can be processed into particles and fine powder / graded powder with various particle size levels, is good in high-temperature volume stability, and can be used for preparing the lanthanum zirconate material. As an electric melting material, the material has the characteristics of small reheating shrinkage and small high-temperature creep deformation.

The application discloses a kind of experimental system and method of multistage acceleration promotion gas-liquid-solid three-phase reaction, it is related to reaction equipment and carbon emission reduction related technical field.The experimental system includes: reaction kettle, is equipped with visual window and atomizing device installation slot;Floating piezoelectric ceramic atomizing device, is embedded in atomizing device installation slot;Gas injection device, including gas hole distribution pipe and the gas injection pump connected with gas hole distribution pipe;Gas hole distribution pipe is equipped with the micropore of uniform distribution;Magnetic stirring device, including magnetic drive base, speed controller and the magnetic stirring sub of being arranged in reaction kettle;Magnetic stirring sub is arranged above gas hole distribution pipe;Support net, is arranged in the side of magnetic stirring sub away from gas hole distribution pipe;Temperature control device, including constant-temperature bath and the temperature controller for controlling constant-temperature bath temperature.The experimental system structure design is compact, modularization, easy to operate, can efficiently accelerate gas-liquid-solid three-phase reaction, applicable to a variety of experimental research.

The invention provides a catalytic cracking method for highly producing ethylene and propylene from hydrocarbons, which comprises the following steps: (1) introducing preheated raw materials and water vapor from the lower part of a reactor, contacting with a catalyst and reacting to obtain a reaction oil agent; the reactor at least comprises two reaction zones, namely a first reaction zone and a second reaction zone from bottom to top, the average solid content of a catalyst in the first reaction zone is greater than 0.2, and the average solid content of a catalyst in the second reaction zone is less than 0.1; (2) carrying out gas-solid separation on the reaction oil agent to obtain a carbon deposit catalyst and oil gas; and separating the oil gas to obtain a product comprising ethylene and propylene. In the initial stage of the reaction, a dense-phase reaction zone is adopted to increase the contact between hydrocarbon molecules and the active center of the catalyst, so that the proportion of catalytic cracking reaction is remarkably increased, and the thermal cracking reaction degree is reduced; a dilute phase reaction zone is adopted at the reaction tail end, reconversion of generated ethylene and propylene is reduced, hydrogen transfer reaction and condensation reaction are reduced, and the yield ratio of diene / (methane + coke) is greatly increased.

The present application relates to fluorination equipment technical field, especially to a kind of fluorinated carbonate-based solvent's continuous reaction device, including reaction main body, inside has reaction cavity;Gas-solid premixing module is communicated with the bottom of reaction cavity tangentially, for making fluorine gas and solid catalyst fully mixed after jointly entering reaction cavity;Liquid distribution module is set in reaction cavity top, and evenly spreads reaction liquid in reaction cavity;Heat exchange reaction module is set in reaction cavity inside and located below liquid distribution module, guides mixed gas stream and reaction liquid to fully counter-current contact, while direct heat exchange is carried out in reaction interface.The continuous reaction device provided by the present application guides three-phase reactants to be evenly distributed in reaction cavity by heat exchange reaction module, then fully contacts reaction, and the heat of reaction process is promptly exchanged and exported, to ensure the normal progress of continuous production.

The invention relates to the technical field of feeding structures, and discloses an annular tubular distributor, a fluidized bed reaction device, a gas phase reaction method and application, the annular tubular distributor comprises a plurality of annular pipes which are concentrically arranged from inside to outside, and each annular pipe is provided with a nozzle; wherein every two adjacent annular pipes communicate with each other through a plurality of connecting pipes which are arranged at intervals in the circumferential direction, and the discharging end of each connecting pipe is connected to the tangential direction of the annular pipe on the inner layer; and in the multiple annular pipes, the annular pipe on the outermost layer extends in the tangential direction to form tangential feeding pipes, the multiple tangential feeding pipes are arranged, and the multiple tangential feeding pipes are arranged at intervals in the circumferential direction. The invention can be adapted to industrial large reactors without reducing production efficiency.

The invention discloses a continuous flow synthesis method of 4, 4 '-dichlorodiphenyl sulfone, and belongs to the field of organic chemical synthesis. The continuous flow synthesis method comprises the following steps: S1, adding sulfuryl chloride into a catalyst, and pre-dissolving to obtain a sulfuryl chloride solution of the catalyst; s2, conveying chlorobenzene to the silicon carbide microchannel reactor by adopting a first feeding pump, conveying the sulfuryl chloride solution to the reactor by adopting a second feeding pump, and reacting the reaction solution at the temperature of 20-60 DEG C; and S3, receiving the material at the outlet of the silicon carbide microchannel reactor into a reaction container filled with water, carrying out hydrolysis reaction, standing for layering after hydrolysis is completed, collecting an oil phase, cooling to 0-10 DEG C, separating out crystals, filtering, washing, and drying to obtain the 4, 4 '-dichlorodiphenyl sulfone. The method realizes continuous preparation of DDS through one-step liquid phase reaction, has the advantages of easily available raw materials, short process flow, controllable reaction process, high production efficiency and the like, has the yield of 94% or more and the purity of 99.8% or more, and effectively solves the problems of long production period, low yield and the like in the prior art.

The present invention relates to a method for preparing isopropyl alcohol, comprising the steps of: supplying a propylene monomer and reaction water as a feed stream to a reactor to produce a gas-phase reaction product comprising isopropyl alcohol; purifying isopropyl alcohol from the gas-phase reaction product and recovering process water; and passing the process water through an arsenic removal device comprising a first filtration layer, an adsorbent layer, and a second filtration layer.

This invention relates to a process for producing chloromethane, comprising: introducing HCl gas with a molar ratio of 0.95-1.1:1 and a first portion of methanol into a parallel primary reactor for a primary reaction; introducing the primary gas-phase reaction product and the second portion of methanol into a secondary reactor for a secondary reaction, wherein the molar ratio of the second portion of methanol to HCl gas is 0.05-0.5:1; introducing the secondary gas-phase reaction product into a rectification section for rectification treatment, wherein the chloromethane mixture obtained at the top is successively condensed by a condenser and a demister to remove the carried-out methanol droplets, thereby obtaining condensate and crude chloromethane product, wherein the condensate is refluxed back to the rectification section; the bottom liquid of the rectification section is introduced into a stripping section for stripping treatment, wherein the stripping gas obtained at the top of the stripping section is sent to the rectification section, and the bottom liquid obtained at the bottom of the stripping section is sent to a reboiler to generate vaporized gas, which is then sent to the stripping section, wherein the ratio of the bottom liquid discharged as wastewater to the bottom liquid sent to the reboiler is 2-5:1.

This invention discloses a method for synthesizing halide solid electrolytes without ball milling. It includes the following steps: S1, dry mixing of precursor powders to obtain a precursor mixture; the precursor powders are the raw materials for synthesizing halide solid electrolytes, and the dry mixing is non-ball milling mixing; S2, pressing the precursor mixture into a compact; S3, heat-treating the compact; the heat treatment is a gradient heat treatment, including a first holding stage and a second holding stage. This invention uses non-ball milling dry mixing instead of traditional high-energy ball milling, combined with heat treatment, enabling the precursor mixture to complete solid-phase reaction and densification in a shorter time, thereby obtaining a halide solid electrolyte with high ionic conductivity. The synthesis method of this invention has a short preparation time, low energy consumption, simple and low-cost equipment, is clean, and has a wide range of applicable raw materials, making it suitable for various halide solid electrolyte systems.

This invention relates to a method for producing 2-nitro-4-methylsulfonylbenzoic acid from 2-nitro-4-methylsulfonyltoluene. The method involves using 2-nitro-4-methylsulfonyltoluene as a raw material and air (oxygen-enriched air or oxygen) as an oxidant in an acidic aqueous solution. A multi-component catalytic system composed of a metal oxygen-metal compound, metal ions, or rare earth ions, and a halogen is employed to form a gas-liquid-solid three-phase reaction, oxidizing 2-nitro-4-methylsulfonyltoluene to 2-nitro-4-methylsulfonylbenzoic acid. This invention overcomes the shortcomings of existing 2-nitro-4-methylsulfonylbenzoic acid production methods, such as large amounts of waste gas and wastewater generation, severe corrosion, low selectivity, and high production costs, thereby reducing environmental pollution and achieving clean production of 2-nitro-4-methylsulfonylbenzoic acid.

The invention relates to the technical field of refined reaction regulation and control of chloroacetone, in particular to an optimized regulation and control method for reaction preparation of chloroacetone, which comprises the following steps: S1, setting a regulation and control target and a reaction state judgment threshold value; s2, collecting reaction liquid detection data, and calculating to obtain the actually measured concentration of chloroacetone; s3, substituting into a chloroacetone concentration correction logarithmic model, and calculating to obtain the actual concentration of chloroacetone; s4, substituting the process adaptation type relative deviation into a chloroacetone reaction state entropy scoring model to obtain a comprehensive score and delimiting a reaction grade; s5, substituting into a chloroacetone chlorine flow dynamic regulation and control model, and calculating the chlorine flow regulation quantity; and S6, performing hierarchical regulation and control according to reaction grades to complete collection of the chloroacetone product. According to the invention, the core factors of the chloroacetone chlorination gas-liquid two-phase reaction are integrated to realize multi-dimensional cooperative regulation and control, so that the technical problems of regulation and control lag and process parameter imbalance in the traditional chloroacetone reaction regulation and control process are effectively solved, and the regulation and control accuracy and real-time response capability of the chloroacetone reaction are remarkably improved.

The invention provides a high-curvature nano carbon gas diffusion electrode, a preparation method and a method for electrically driving in-situ generation of calcium peroxide, and belongs to the technical field of electrode materials. According to the method, cotton fabric fibers are subjected to high-temperature rapid pyrolysis carbonization in a Joule heat rapid pyrolysis mode, the high-curvature nano carbon material can be obtained, the high-curvature nano carbon material has extremely high selectivity on 2e-ORR under the alkaline condition, and the hydrogen peroxide generation amount and the Faraday efficiency of the high-curvature nano carbon material are far higher than those of other carbon materials. According to the method, a stable and efficient gas-liquid-solid three-phase reaction interface is constructed, exogenous oxygen and an alkaline electrolyte containing Ca < 2 + > can be electrically driven to produce H2O2 and generate calcium peroxide in situ, a high-curvature nano carbon gas diffusion electrode is used as a cathode, the conversion rate of converting H2O2 on the surface of the electrode into CaO2 can reach 100%, and the purity of the obtained CaO2 is 87.5% and is far higher than that of 70% of a laboratory reagent.

The invention provides a Raman characterization method based on targeted modification of SHINERS and co-pool synchronous monitoring of heterogeneous Fenton-like reaction, and belongs to the technical field of cross of spectral analysis and environmental catalysis. Aiming at the defects of poor sample preparation stability, large measurement system error and only qualitative data analysis in the prior art, through innovative fusion of a targeted stable sample preparation technology and a dual-electrode common-pool synchronous monitoring system, a time-resolved in-situ Raman spectrum and a targeted modified shell layer isolated nanoparticle enhanced Raman spectrum are combined for use; dynamic in-situ characterization of transient intermediates, active species and reaction paths on the surface of the catalyst in a heterogeneous Fenton-like reaction system is realized. The method can adapt to various catalysts and oxidants, qualitative characterization and process detection of heterogeneous reaction are achieved, breakthrough technical support is provided for analysis of a Fenton-like reaction mechanism, and the problems that a traditional sample preparation and measurement method is poor in universality and insufficient in uniqueness are solved.

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.

The invention provides a method for efficiently synthesizing 6-aminocapronitrile based on a continuous flow microreactor, which comprises the following steps: uniformly stirring a caprolactam solution and a solid catalyst to obtain a solid-liquid mixed reactant, respectively preheating the solid-liquid mixed reactant and ammonia gas to reach a reaction temperature, and reacting for 2-4 hours to obtain 6-aminocapronitrile. Continuously injecting into a mixer to realize full mixing of gas-liquid two-phase reactants to obtain a completely mixed reaction solution; continuously inputting the reactant solution into the microreactor, and carrying out heterogeneous catalytic ammonification reaction for 0.5-10 minutes under the conditions that the reaction temperature is 60-300 DEG C and the pressure is 0.01-3 MPa; and finally, carrying out heat exchange cooling and gas-solid-liquid separation treatment on the product to obtain the product 6-aminocapronitrile. According to the method, mass transfer is enhanced through the microreactor, so that the conversion rate is as high as 99.7%, the yield is 98.2%, the reaction time is shortened to 0.5-10 min, and the problems of more side reactions and low efficiency of a traditional process are solved.

A high-efficiency short-process production method and production system for carbonized silica is provided. The absorption reaction is completed in a small gas-liquid carbonization reaction kettle at atmospheric pressure, and the absorption is enhanced through high-intensity stirring and gas-liquid interface contact, so that the rapid and continuous reaction of CO2 gas and liquid sodium silicate in the carbonization reaction kettle is realized, and the high-efficiency absorption of carbon dioxide is realized under atmospheric pressure reaction conditions. Carbonization reaction is performed in a small-scale carbonization reaction kettle, and precipitation reaction can be performed in a large-scale precipitation reaction kettle according to the scale. Solid-liquid reaction is performed in the precipitation reaction kettle. By controlling the reaction time, reaction temperature and reaction pH, the fine particles of silicon dioxide generated by the absorption reaction are further aggregated and grown to form silicon dioxide particles with stable structure and reliable performance.

This invention discloses a method and system for monitoring low-temperature solid-state reactions in gas-solid two-phase flow based on in-situ Raman spectroscopy, relating to the application of fiber optic sensing in solid-state reactions. The method includes: S1, designing the thickness t of the observation window glass on the top cover of the reaction chamber based on the volume of the gas-solid two-phase flow low-temperature solid-state reaction device; S2, installing the laser Raman probe in the in-situ Raman spectroscopy detection module at the location of the observation window glass; S3, adjusting the operating parameters of the gas-solid two-phase flow low-temperature solid-state reaction device and introducing high-pressure nitrogen gas into the reaction chamber; S4, starting the in-situ Raman spectroscopy detection module, setting the spectral acquisition parameters, and acquiring the Raman spectral characteristics of the substances within the reaction chamber through the laser Raman probe. Based on the acquired Raman spectral data, this invention can be used to analyze the solid-state reaction mechanism and reaction kinetics, and provide real-time feedback information for the optimized design of low-temperature solid-state reaction conditions in gas-solid two-phase flow.