40results about How to "Suitable for industrial scale applications" patented technology

The invention relates to a sandwich structure for enhancing luminous intensity of photoluminescence of luminous film and a preparation method of the sandwich structure. The sandwich structure is a sandwich structure of substrate-luminous film-monolayer dense-paving sphere array formed by densely paving a micrometern transparent dielectric sphere monolayer on the luminous film; the used micrometer transparent dielectric spheres have relatively high transmissivity to wave lengths of exciting light and fluorescent light in the photoluminescence; the used fluorescence enhancing medium-micrometer transparent dielectric spheres are low in price and are suitable for industrial large-scale application. The used micrometer transparent dielectric spheres are not oxidized under air environment and can be used for steadily enhancing the luminous intensity of the fluorescence of the luminous film for a long time; the used micrometer transparent dielectric spheres have no requirements on the luminous film; the substrate can be nonmetal or metal, and due to substrate, the application range of the luminescence enhancement technology of the photoluminescence of the luminous film is effectively extended.

The invention belongs to the field of chemical engineering, and relates to a method for using hydrocyanic acid mixed gas to prepare 2-hydroxy-4-methylthio-butyronitrile and a continuous production method for the 2-hydroxy-4-methylthio-butyronitrile. The method comprises the following steps: preparing hydrocyanic acid mixed gas I by using methane, ammonia gas and oxygen as raw materials and adopting the synthetic principle of an Andrussow method; deaminizing the hydrocyanic acid mixed gas I to obtain hydrocyanic acid mixed gas II; enabling the hydrocyanic acid mixed gas II to fully react with methylthiopropanal under the catalysis of alkali, so as to obtain the 2-hydroxy-4-methylthio-butyronitrile. According to the invention, the method adopts raw materials not purified, the raw materials are low in cost and easy to obtain, and the prepared 2-hydroxy-4-methylthio-butyronitrile is high in yield and high in purity; the obtained 2-hydroxy-4-methylthio-butyronitrile reaction system not subjected to purification and separation is stable in property, and can be stored for a long time and used for the production of down-stream products conveniently. The continuous production method for the 2-hydroxy-4-methylthio-butyronitrile particularly adopts a multi-level series tank reactor, so that the continuous production method can realize industrial large-scale continuous production, is low in production cost, efficient, environment-friendly and suitable for industrial popularization and application.

The invention discloses a nano calcium carbonate catalyst wrapped by Ag-loaded titanium dioxide nanoparticles as well as a preparation method and application of the nano calcium carbonate catalyst. The surfaces of spindle-shaped nano calcium carbonate particles are wrapped by Ag-loaded titanium dioxide nanoparticles. The catalyst can be added into paper-making process reconstituted tobaccos so as to be added into cigarettes containing the reconstituted tobaccos, so that the smoke reaction is catalyzed in cigarette igniting and smoking processes and the carbonyl compound content of the smoke can be reduced. According to the invention, the preparation process is simple, convenient and economical, and the prepared catalyst has a remarkable particle catalysis effect, is low in cost and is suitable for industrial application.

The invention discloses a preparation method of oxymethylisourea acetate. The method comprises the following steps: 1) the methanol solution of oxymethylisourea hydrogen sulfate is reacted with sodium acetate and sodium hydroxide at a temperature of 10°C to 65°C, and the reaction time is 2 hours to 10 hours, and oxymethylisourea hydrogen sulfate The molar ratio of salt to sodium hydroxide and methanol is 1:1:6~10, and the molar ratio of oxymethylisourea bisulfate to sodium acetate and sodium hydroxide is 1:0.8~1.5:0.8~1.50; 2) The precipitated sodium sulfate is removed from the reaction mixture at the temperature of step 1); 3) the reaction solution is concentrated by distilling methanol at a temperature of 40°C to 80°C; 4) the oxymethylisourea acetate concentrate is cooled, Crystallization, centrifugation can be. The synthesized product of the invention has high purity, high yield and simple process, and the method is particularly suitable for industrial scale application.

The invention relates to a device for increasing a recovery rate of sulfur and a recovery method of sulfur. The device comprises a sulfur production process tail gas recovery device, a shift gas recovery device and a circulating system. With the adoption of the recovery device and method, the sulfur recovery rate can be close to 100%, and further, the device and the method have the advantages of simple process and low investment and operating cost, and are suitable for large-scale industrial application.

The invention relates to a method for preparing 5-(2-methylmercapto-ethyl)-hydantoin by utilizing crude hydrocyanic acid gas and relates to the field of chemical industry. The method disclosed by the invention comprises the following steps of: completely reacting hydrocyanic acid mixed gas made by adopting an Ann method with methylmercapto propionaldehyde to obtain a 2-hydroxyl-4-methylmercapto-butyronitrile reaction system under the catalytic action of organic alkali; and sufficiently reacting the 2-hydroxyl-4-methylmercapto-butyronitrile reaction system with ammonium bicarbonate in a water medium to obtain 5-(2-methylmercapto-ethyl)-hydantoin. Due to adoption of raw materials which are not rectified or purified, the method disclosed by the invention is short in production time, high in production efficiency and low in production cost; the prepared 2-hydroxyl-4-methylmercapto-butyronitrile reaction system is steady in property and can be stored for a long time; and 5-(2-methylmercapto-ethyl)-hydantoin with high purity and high yield can be obtained through simple separation and purification operations under the synergistic effect of other substances in reaction liquid.

The invention discloses a preparation method for a transparent dielectric microsphere flexible film used for strengthening raman scattering spectral intensity, and belongs to the field of spectrum detection. The preparation method comprises the following steps: preparing a transparent dielectric microsphere turbid liquid; dispensing the dielectric microsphere turbid liquid on an inclined glass sheet surface; after a solvent in the turbid liquid on the inclined glass sheet is evaporated, forming a microsphere single-layer densely paved array structure; preparing a polydimethylsiloxane (PDMS) solution; dispensing the uniformly mixed PDMS solution on the glass sheet deposited with the microsphere array, and thinning by equalizing glue; heating the glass sheet covered with the microsphere array and a PDMS liquid-state thin layer and cooling the glass sheet to the room temperature, embedding the microsphere array into a PDMS film and curing the PDMS film; and separating the microsphere filmfrom the glass sheet. The flexible film can be adhered to the surfaces of various samples, so that raman scattering strengthening on a semiconductor material, one-dimensional and two-dimensional nanomaterials and a three-dimensional structural surface material can be realized.

The invention discloses a squeeze casting method and equipment based on the coupling of power ultrasound and pressure. The method is to simultaneously apply power ultrasound and pressure to a metal melt, and change the physical structure of the metal melt through the synergistic coupling of pressure and power ultrasound. Then, while cooling the mold cavity, the corresponding experimental data is collected and processed through data acquisition; its equipment includes mold cavity, heat preservation heater, punch, power ultrasonic generator, mold cooling system and data collector, mold The wall of the mold cavity is equipped with a heat preservation heater, the punch is set above the mold cavity, the power ultrasonic generator is set on the side of the mold cavity, the mold cavity is equipped with a mold cooling system, the data collector and the mold mold The outer side of the lumen wall is connected. The invention has a simple principle, can improve the efficiency and speed of squeeze casting, effectively improve the microstructure and performance of the metal melt, and also builds a platform for subsequent experiments, and the real-time measured data can help in-depth experimental analysis.