590 results about "Microreactor" patented technology

The invention relates to the technical field of temperature control, and particularly discloses a micro-reactor real-time control system for fine chemical engineering, and the system comprises an acquisition module which calculates a standard temperature according to the temperature at a monitoring point, and periodically obtains the standard temperature in a preset acquisition period; the analysis module is used for calculating a temperature difference value, obtaining a maximum temperature difference value and obtaining a temperature change value; coordinate points are generated and fitted to obtain a fitted curve, and the total number of reference points on the fitted curve is counted; and the adjusting module is used for calculating the judgment value, determining whether to adjust the power of the temperature adjusting module or not according to the judgment value, and adjusting the power of the temperature adjusting module according to the fitting curve. According to the invention, the environment temperature in the microreactor can be kept stable, and the complexity of controlling the temperature in the pipeline is reduced.

A nuclear reactor is discussed herein. In some examples, the nuclear reactor may comprise an inner-core region, including liquid fuel, coolant / moderator, and a hydrogen vapor space, an out-of-core region surrounding the inner-core region, the out-of-core region including, an inner reflector adjacent to the inner-core region, the inner reflector including a first irradiation facility, and an outer reflector adjacent to the inner reflector, the outer reflector including a second irradiation facility.

The invention belongs to the technical field of micro-reaction, and particularly relates to a micro-mixer and a method for continuously preparing nano cooling liquid. Comprising a reaction cavity in which a plurality of reaction flow channels are arranged, all the reaction flow channels are used for preparing nano cooling liquid and are vertically arranged in the reaction cavity in a three-dimensional spiral shape, and each reaction flow channel is internally provided with a plurality of disturbance structures and a plurality of distributors which are arranged in the reaction cavity and located above all the reaction flow channels, each distributor is connected with the inlets of all the reaction flow channels, the collectors are arranged at the outlets of all the reaction flow channels, and pressure regulating structures are arranged in the collectors. According to the invention, the distributor is adopted to enable the reaction fluid to flow into the corresponding reaction flow channel, the three-dimensional spiral flow channel design in the reaction cavity is folded in space, so that the overall size of the microreactor is not too large, and a disturbance structure is arranged in each reaction flow channel, so that the mixing efficiency can be further improved; the production rate of the microreactor is improved, and blockage in a flow channel is avoided.

The invention relates to the technical field of organic synthesis, in particular to a preparation method of p-tert-butoxystyrene. According to the preparation method provided by the invention, the p-tert-butoxystyrene is prepared by utilizing the continuous flow microreactor, the operation is simple and safe, the efficiency is high, the reaction time is short, the temperature is low, expensive reagents are not used, the amplification effect does not exist, the prepared p-tert-butoxystyrene product is high in yield and purity and stable in quality, and the method is suitable for large-scale production and has wide application prospects. The production cost can be greatly reduced, and the production safety is improved.

The invention belongs to the field of fluorine-containing fine organic chemical synthesis, and particularly relates to a method for continuously and cleanly producing perfluoroolefin epoxide by using hydrogen peroxide. The invention relates to a method for continuously and cleanly producing perfluoroolefin epoxide by using hydrogen peroxide, which comprises the following steps of: reacting perfluoro-2-methyl-2-pentene serving as a raw material in the presence of a polar solvent and hydrogen peroxide serving as an oxidant under the action of a catalyst to obtain perfluoro-2-methyl-2, 3-epoxypentane. The method has the beneficial effects that the micro-reactor is used, and the oxidizing agent, the catalyst, the cocatalyst and the polar solvent are continuously introduced into the pipeline of the micro-reactor, so that the synthesis from the hexafluoropropylene dimer to the epoxy compound is completed in a short time.

The invention relates to a method for continuously synthesizing a dapagliflozin intermediate, and belongs to the technical field of drug intermediate synthesis. The method comprises the following steps: mixing 5-bromo-2-chloro-4 '-ethoxydiphenylmethane, a photocatalyst and THF (tetrahydrofuran), introducing the mixture into an ultraviolet light catalytic micro-channel for pre-activation to generate an aryl free radical intermediate, namely a pre-activation solution, carrying out contact reaction on the pre-activation solution and a THF solution of 2, 3, 4, 6-tetra-O-trimethylsilyl-D-glucolactone in a low-temperature coupling area of a micro-reactor, and carrying out purification, purification and purification to obtain the aryl free radical intermediate. The reaction liquid is introduced into a dynamic quenching zone and is mixed with supercritical CO2 on line, an intermediate I is obtained through supercritical fluid extraction and separation, and the photocatalyst is recycled; the method has the advantages of high reaction efficiency, convenience in catalyst recovery and simplicity in product separation.

The invention relates to the field of caprolactam production, and discloses a green and efficient production process and device. The process comprises the following steps: continuously oximating cyclohexanone and hydroxylamine in a microreactor under the catalysis of mesoporous silica solid acid; carrying out gas phase rearrangement on cyclohexanone-oxime in the presence of a ZSM-5 molecular sieve under the assistance of microwaves; coupling, rectifying and purifying the crude product through a four-stage molecular sieve membrane; and performing catalytic cracking on the by-product to obtain N2 / H2O and recycling. The device comprises a micro-reaction unit, a microwave-radial reactor, a membrane coupling rectifying tower group and a tail gas cracking unit. Zero emission of ammonium sulfate is achieved, the product purity is larger than or equal to 99.95%, and energy consumption is reduced by 45%.

The invention relates to the technical field of nitrobenzene production, in particular to a method for preparing nitrobenzene by adopting a microreactor under a low-acid condition, the method for preparing nitrobenzene comprises the following steps: introducing a nitrating agent and raw material benzene into the microreactor for nitration reaction to obtain nitrobenzene, the microreactor is provided with at least four reaction modules which are connected in series, a nitrating agent and raw material benzene are fed into the first reaction module, and concentrated sulfuric acid is supplemented into at least one reaction module in other reaction modules except the first reaction module in the nitration reaction process; the effective concentration of sulfuric acid in the nitrating agent is not higher than 77%. The method for preparing nitrobenzene solves the production problems that benzene in a micro-reaction system is poor in reaction stability, incomplete in conversion and large in residual quantity in a low-acid environment, dinitration is affected, and the yield of waste acid is large. Finally, a mechanical application process of the dinitration waste acid and the acidic benzene is realized, the production process is safe and reliable, the operation flexibility is high, and the stability is high.

The invention discloses a multi-component atomic level oxide solid solution integrated electrode for electrolyzed water and a preparation method thereof, and belongs to the field of metal material surface plating. The electrode is composed of a gas diffusion layer, a nano array substrate and an atomic level oxide solid solution catalyst layer. The preparation method comprises the following steps: constructing a nano array microreactor on the surface of the gas diffusion layer; the method comprises the following steps: driving an atomic hierarchy solid solution to reconstruct by utilizing an array confinement effect through combination of precursor directional spraying and a heat treatment-rapid quenching process, and constructing a three-dimensional conformal ionomer network on the surface of the atomic hierarchy solid solution; and performing gold plating treatment on the back side of the electrode. Through the synergistic effect of spatial constraint and thermodynamic regulation of the nano microreactor, the traditional electrode interface mismatch bottleneck is broken through, and while precise construction of atomic-scale active sites is realized, the mechanical stability and oxygen evolution reaction kinetics of the electrode are improved. The preparation process has the advantages of controllable flow, strong large-scale expansibility and good industrial preparation prospect.

The invention discloses a microfluidic nitration reaction platform based on in-situ Raman and a reaction optimization method. The platform integrates a microreactor, an in-situ Raman detection module, a spectrogram processing and quantifying module, an experimental optimization module and a central control module, and is suitable for monitoring and optimizing complex reactions under a non-mutual solution phase plunger flow system. According to the method, an indirect hard modeling (IHM) method is used for processing an overlapped Raman spectrogram, a standard curve is combined for establishing a multi-component concentration prediction model, and high-precision quantification of reactants and products is realized. According to the platform, a Gaussian process model is combined with dynamics prior, a multi-target Bayesian optimization process based on expected hypervolume improvement (EHVI) is driven, and Pareto optimal conditions in a temperature and residence time space are effectively explored. The system has the functions of automatic focusing sampling, spectrogram real-time decoupling, concentration inversion and experimental condition decision making, and is suitable for intelligent reaction development and optimization in the fields of fine chemical engineering, high-throughput reaction screening and the like.

The invention discloses a nano cerium oxide synthesis method which comprises the following steps: preparing a reaction solution; performing ultrasonic reaction; carrying out aging treatment; centrifugally washing; drying and calcining; the cerium salt solution is prepared from soluble cerium salt, and the concentration of the cerium salt solution is 0.01 mol / L to 1 mol / L; the precipitant solution is one or more of ammonia water, a sodium hydroxide solution, a sodium carbonate solution and a sodium bicarbonate solution, and the concentration of the precipitant solution is 0.2 mol / L-8 mol / L; the ultrasonic power of the ultrasonic microreactor is 10W to 1000W; the calcining temperature ranges from 400 DEG C to 1000 DEG C. The nano cerium oxide with less agglomeration, controllable particle size, uniform size and adjustable morphology is obtained on the basis of super-strong mixing and crystallization promoting capabilities of the ultrasonic microreactor. Meanwhile, the method is simple and convenient to operate, easy to amplify and convenient for industrial production.

The invention discloses a metal microreactor surface temperature testing method based on a digital twinning technology, and relates to the technical field of metering calibration. The method comprises the following steps: establishing a geometric model according to the actual geometric size and the internal structure of the metal microreactor, and carrying out grid division; inputting physical information of the metal microreactor into the divided geometric model, mapping the physical information into a corresponding digital twin physical model, solving the model, and reasoning the distribution condition of a temperature field in the metal microreactor according to a solving result, so as to provide a mechanism for surface temperature measurement; by knowing the change mechanism of the internal temperature field, the position of the standard sensor placed on the surface of the micro-reactor is determined, and the indication error of the detected temperature sensor in the metal micro-reactor is calculated through a comparison method. According to the method, high-precision and standardized testing of the surface temperature of the microreactor can be realized, the service life of equipment is effectively prolonged, and the maintenance cost is reduced.

The utility model discloses an ultrasonic microreactor which is formed by directly attaching an ultrasonic transducer and a microreactor, the ultrasonic microreactor is formed by connecting a plurality of fluid microchannel reaction layers in series; the fluid micro-channel reaction layer is formed by alternately connecting a plurality of thin channels and thick channels; a reaction layer turbulent flow chip is arranged in the middle of the thick channel; under the synergistic effect of ultrasound and the microreactor, the ultrasonic microreactor has higher energy density and more accurate sound field and flow field regulation and control capability, and can solve the problems that channels are easy to block and the like, so that nano-emulsion with uniform particle size can be continuously prepared, and the efficiency of an emulsification process and the quality of an emulsion product are improved.

The invention discloses a method for preparing a functionalized polymer based on a macro-micro reactor chemical-enzyme method, which comprises the following steps: reacting a mixed solution of an acrylate monomer, an initiator, a ligand, a functional alcohol and a solvent in a micro reactor to obtain a reaction solution containing functionalized polyacrylate, and the micro reactor comprises the macro-micro reactor containing a copper internal member. In a macro-micro reactor, enzymatic ester exchange and Cu (0)-RDRP coupling reaction are carried out to obtain poly (methyl) acrylate with a series of chemical structures and copolymers of the poly (methyl) acrylate. The method is wide in applicable substrate range, and compared with a traditional synthesis method, the macro-micro reactor containing the internal component can remarkably shorten the polymerization time, secondary purification of the monomer is avoided, and the conversion rate is greatly increased. The characteristic scale of the macro-micro reactor reaches centimeter level, and high-flux synthesis can be realized. The invention provides a technical scheme for the preparation of the functionalized poly (methyl) acrylate polymer, and has an industrial conversion prospect.

The invention discloses a preparation method for regulating the morphology of zinc oxide, and belongs to the technical field of metal oxides, and the preparation method comprises the following steps: (1) preparing a zinc salt solution and an alkaline solution; (2) respectively inputting the zinc salt solution and the alkaline solution into an ultrasonic microreactor, enabling the zinc salt solution and the alkaline solution to be in contact in the conveying process in the ultrasonic microreactor, and reacting under the ultrasonic action to form zinc oxide slurry; and (3) outputting the zinc oxide slurry from the ultrasonic microreactor, filtering, washing, drying, crushing, and screening to obtain the zinc oxide powder. Controllable synthesis of nano-zinc oxide with different morphologies is realized by utilizing the super-strong mixing capacity of the ultrasonic pipeline reactor.

The invention belongs to the field of organic chemical synthesis, and relates to a method for continuously synthesizing 1-nitroanthraquinone. A microreactor continuous flow circulation system is adopted, the raw material anthraquinone is prepared into slurry, and the slurry reacts with concentrated sulfuric acid with a set feeding flow in the continuous flow circulation system to realize continuous nitration of anthraquinone. The process for continuously synthesizing the 1-nitroanthraquinone by using the method is simple, the time is greatly shortened compared with that of a kettle type process, the requirement on equipment temperature control is lower, the solid slurry can continuously flow in the pipeline without blocking the pipeline, the reaction operability is improved, the product selectivity is good, and the raw material conversion rate is high. The microreactor continuous flow circulation system adopted by the invention has better mass and heat transfer efficiency, the reaction temperature control is more accurate, the explosion risk is reduced, and the operation process is safer.

The invention provides bionic fractal micro-channel reactor equipment for fluid fuel hydrogen production, which is particularly suitable for marine mobile hydrogen production scenes such as a ship power system and an offshore hydrogen refueling station. The microreactor adopts an upper, middle and lower layer functional structure design, and comprises a diversion diffusion area, a chemical reaction area and a product buffer collection area, the diversion diffusion area and the product buffer collection area are fractal tree-shaped microchannels with optimal continuous length ratio and mass diffusion flux, and the diffusion resistance of reactants can be remarkably reduced. By virtue of the characteristics of compact structure, vibration resistance and easiness in integration of the fractal microchannel, uniform distribution and efficient transportation of reactants are realized, heat and mass transfer performance can be enhanced under harsh working conditions of the ocean, and hydrogen production efficiency and system reliability are improved by combining efficient heat source supply and fuel conversion processes; and the requirements of an ocean mobile platform on efficient, compact and stable hydrogen production equipment are met.

The invention discloses a method for reducing nitro compounds through an electrochemical microreactor. According to the method, nitrobenzene or a derivative thereof is subjected to electrochemical catalysis in a multi-channel series electrolytic tank in a constant-current electrolysis mode to be reduced to generate aniline or a corresponding aniline derivative. According to the method disclosed by the invention, the Faraday efficiency is improved from 40% to more than 80% under the condition that the yield of the nitrobenzene is kept unchanged compared with that of the existing electrochemical reduction nitrobenzene, so that the fixed energy consumption is greatly reduced, and rapid, efficient, continuous and large-scale production of the nitrobenzene and the derivatives thereof is realized.

The invention belongs to the technical field of chemical synthesis, and particularly relates to a method for preparing caprolactone, in particular to a method for continuously preparing caprolactone. The method comprises the following steps: (1) mixing a peroxy acid synthesis solution containing an acidic catalyst with a stabilizer which is a nitrogen-containing alkaline compound and has lone pair electrons on an N atom; and (2) respectively inputting cyclohexanone and the mixed solution obtained in the step (1) into a microreactor to carry out a first reaction, and then introducing a product obtained by the first reaction into a tubular reactor to carry out a second reaction. By adopting the method for preparing the caprolactone, the stability and safety of the reaction can be improved, meanwhile, the conversion rate of the cyclohexanone is increased, the conversion rate of the cyclohexanone is 99.5% or above, and the selectivity of the prepared caprolactone is gt; the content is 99.5%.

The utility model relates to the technical field of peptide synthesis equipment, and discloses a microreactor-assisted peptide synthesis device, including a cleaning device, wherein a mixing device is arranged inside the cleaning device, wherein the cleaning device includes a box, wherein the upper end of the box is fixedly connected with a motor, the lower end of the motor is fixedly connected with a frame, the inner top wall of the frame is fixedly connected with an electric push rod, the lower end of the electric push rod is fixedly connected with a slider, and the two ends of the slider are fixedly connected with connecting rods. The microreactor-assisted peptide synthesis device is driven by a motor, and the motor drives the frame to rotate, and the frame drives a scraper to rotate through a slider and a connecting rod, and the scraper scrapes the solution adhered to the inner wall of the box, and by starting the electric push rod, the electric push rod pushes the slider to move downward, and the slider drives the scraper to descend through the connecting rod, so that the scraper rotates and descends, and scrapes the inner wall of the box, thereby achieving the effect of facilitating the scraping of the adhered solution and reducing the waste of raw materials.

The utility model relates to the technical field of fluid mixing reaction devices, and discloses a microreactor. The micro-reactor comprises a reaction plate, a flow channel is concavely arranged on the reaction plate, the flow channel comprises a feeding area, a mixed reaction area and a discharging channel which are communicated in sequence, the feeding area comprises a first feeding channel, a second feeding channel and a premixing channel, the second feeding channel is located in the first feeding channel, the extending direction of the second feeding channel is the same as that of the first feeding channel, and the premixing channel is located in the second feeding channel. One end of the pre-mixing channel is respectively communicated with the discharging ends of the first feeding channel and the second feeding channel, and the other end of the pre-mixing channel is communicated with the mixing reaction area. According to the microreactor, in the feeding process, two kinds of fluid cannot collide, mutual influence of the two kinds of fluid due to large flow velocity difference is avoided, and compared with the prior art, premixing of the two kinds of fluid is better facilitated, so that the premixing effect and the uniformity degree of the two kinds of fluid are improved, and subsequent full mixing reaction of the two kinds of fluid is better facilitated.

The utility model discloses a simple continuous flow microreactor device with replaceable packing. The simple continuous flow microreactor device comprises a liquid pipeline system, a gas pipeline system, a microreactor and a cooling and product collecting system, the micro-reactor is a filler type micro-reaction tube, the filler type micro-reaction tube comprises a tube body, the tube body is filled with a replaceable porous filler, and the porous filler has both a microporous structure and a mesoporous structure; filtering sieve plates for intercepting porous fillers with different sizes are respectively arranged at the upper end and the lower end of the pipe body, and are respectively connected with the material inlet and outlet joint through fixing pieces for stabilizing the fillers; a blade ring and a sealing ring are sequentially arranged between the fixing piece and the pipe body from top to bottom. The microreactor disclosed by the utility model is applied to preparation of amide compounds, and compared with a conventional microreactor, the microreactor disclosed by the utility model can obtain higher product yield.

The invention discloses a continuous hydrogenation device and process. The continuous hydrogenation device comprises a gas supply system, a liquid supply system, a heating system, a hydrogenation reactor, a gas-liquid mixing distributor, a cooling system, a gas-liquid separation system and a product collection system, the gas supply system and the liquid supply system are respectively connected with an inlet of the gas-liquid mixing distributor through pipelines, and an outlet of the gas-liquid mixing distributor is connected with an inlet of the reactor through a pipeline; a first spacer bush and a second spacer bush which are concentrically distributed are arranged in the reactor to form an S-shaped circulation channel, so that the retention time of materials is prolonged; meanwhile, various catalytic structures are provided, such as a micro-reaction channel with a catalyst coating on the inner wall, a filling type catalyst layer and a multi-stage micro-reactor, the contact area of raw materials and a catalyst is increased, the reaction conversion rate is increased, a crescent flow blocking column is arranged in a thick-section channel of the multi-stage micro-reactor, the gas-liquid mixing uniformity can be further enhanced, and the gas-liquid mixing efficiency is improved. Incomplete local reaction is avoided, and the product purity is improved.

The invention belongs to the field of chemical engineering, and relates to a process device and method for continuously synthesizing glycidyl (3-chloro-1, 2-propylene glycol and sodium hydroxide (hereinafter referred to as NaOH) as raw materials). The device comprises a raw material feeding pump, a heat exchanger, a micro-reactor, a delay tube reactor 1, a neutralization micro-reactor and a delay tube reactor 2 which are sequentially in fluid communication through pipelines, the heat exchangers are divided into two groups, one group is used for heat exchange of 3-chloro-1, 2-propylene glycol solution, and the other group is used for heat exchange of alkaline solution. According to the method, a 3-chloro-1, 2-propylene glycol solution and a sodium hydroxide solution (NaOH) are adopted as raw materials, glycidol is continuously prepared through a microchannel reactor, on the basis, an acid-base neutralization reaction can be carried out in situ according to needs to remove redundant alkali, redundant heat generated by the acid-base neutralization reaction is absorbed through a low-temperature material, and energy consumption is reduced; the product is analyzed by gas chromatography, and the generated glycidol does not have hydrolysates or auto-polymerization products, so that the product selectivity is higher.

The present invention relates to a multistage series microreactor and a fluid mixing method. The microreactor includes a base internally etched with a fluid passage, the base being provided with a fluid inlet and a fluid outlet which are communicated with the fluid passage, where the fluid passage includes a plurality of micro mixing tanks, a jet port is formed at an inlet of the micro mixing tank, adjacent micro mixing tanks are connected by jet port at a contraction section, and a splayed flow baffle plate and a flow splitting column which are arranged corresponding to the jet port are provided in the micro mixing tank, the flow splitting column being arranged below the splayed flow baffle plate. By means of a jet manner, a fluid to be mixed in the invention can be continuously split, compounded, stretched and crushed, thereby realizing rapid mixing and efficient, continuous reaction.

The invention provides a continuous preparation method of a para-aramid polymer. The continuous preparation method comprises the following steps: (a) mixing p-phenylenediamine and a polar solvent to obtain a p-phenylenediamine solution; (b) melting the terephthaloyl chloride to obtain molten terephthaloyl chloride; (c) introducing the p-phenylenediamine solution prepared in the step (a) and part of the molten-state terephthaloyl chloride prepared in the step (b) into a micro-channel reactor for reaction to obtain a prepolymer; (d) mixing the prepolymer prepared in the step (c) with the remaining molten terephthaloyl chloride prepared in the step (b), and reacting to obtain a para-aramid polymer; and the micro-channel reactor is a single-channel micro-reactor. According to the continuous preparation method provided by the invention, the materials are uniformly mixed, the reaction heat can be quickly removed, the side reaction is effectively controlled, and the prepared para-aramid polymer has the characteristics of narrow molecular weight distribution, stable performance and good particle size uniformity.

The invention discloses superfine copper powder and a preparation method and application thereof, and belongs to the technical field of copper powder.The preparation method of the superfine copper powder comprises the following steps that a micro-channel reactor is provided, and the micro-channel reactor comprises a micro-mixer and a micro-reactor which are connected with each other; a copper salt solution, a reducing agent solution and a sodium hydroxide solution are injected into a micro-channel reactor to be evenly mixed, a mixed solution is obtained and then enters the micro-channel reactor to be subjected to a reaction, discharging is conducted, and the superfine copper powder is obtained. The injection flow rate ratio of the sodium hydroxide solution to the copper salt solution to the reducing agent solution is (0.5-2): (0.8-1.2): (0.8-1.2). According to the method, the uniformity and the preparation efficiency of the superfine copper powder are remarkably improved, meanwhile, the reaction time is greatly shortened, the yield and the purity of the superfine copper powder are remarkably improved, continuous and efficient preparation of the superfine copper powder is achieved, and the method has wide application prospects.

The invention discloses a method and a system for improving heap leaching efficiency of metal ore by using micro-nano bubbles, which comprise the following steps: a) generating the micro-nano bubbles: installing a micro-reactor on a leachate conveying pipeline, introducing oxygen or air, and enabling the leachate to pass through the micro-reactor under a certain pressure to generate a leachate containing the micro-nano bubbles; b) conveying the gas-containing leachate: conveying the leachate containing the micro-nano bubbles to an ore dump leaching area, and enabling the leachate to be in full contact with the ore in the dump leaching process; and c) reinforcement of the dump leaching process: promoting leachate to permeate into fine gaps of ore particles by utilizing high permeability and high mass transfer characteristics of the micro-nano bubbles, enhancing the oxidation reaction and improving the leaching rate of metal. According to the method, the metal leaching rate is remarkably increased, the leaching time is shortened, the agent consumption is reduced, and remarkable economic benefits and environmental benefits are achieved.

The invention discloses a process and a device for recycling nitrogen dioxide, which are characterized in that degassed crude dimethyl sulfoxide is used as a raw material, nitrogen dioxide is absorbed by two stages of crude dimethyl sulfoxide and enters a micro-channel reactor to be used as a catalyst for oxidizing dimethyl sulfide, and recycling is realized. The device comprises a tail gas absorption unit, a microreactor unit, a heat exchanger unit and a separator unit, the technology adopts a dimethyl sulfoxide low-temperature absorption technology, and has the advantages of cyclic utilization of nitrogen oxides, energy conservation and emission reduction, convenience in operation, greenness, high efficiency and the like.

The invention discloses a method for preparing a nano calcium silicate hydrate seed crystal early strength agent by using a microemulsion and application of the nano calcium silicate hydrate seed crystal early strength agent. The preparation method comprises the following steps: preparing a water-in-oil microemulsion; the invention relates to a method for preparing a nano calcium silicate hydrate seed crystal early strength agent by taking a microemulsion as a dispersion phase and application. The microreactor is constructed by utilizing the characteristics of the microemulsion, and the reaction rate and the product size are controlled microcosmically and macroscopically, so that the product has better physical and chemical properties. According to the invention, the traditional microemulsion and the surfactant-free microemulsion are used, so that the problem of surfactant residue in the product is well solved, and the separation cost is reduced; and the oil phase solution after the precipitation product is separated can be recycled, so that the synthesis cost is further reduced. The obtained product has the characteristics of small particle size, stable particle size distribution and good dispersity, has a remarkable improvement effect on the early strength and the compactness of set cement, and does not reduce the later strength at the same time.