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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 11. Отображено 11.
14-04-2023 дата публикации

Sodium hypochlorite production system capable of protecting production line

Номер: CN115957713A
Принадлежит:

The invention belongs to the technical field of sodium hypochlorite production, and particularly relates to a sodium hypochlorite production system for protecting a production line, which comprises a sodium hypochlorite reaction tower, a sodium hypochlorite tank group, an accident chlorine tower, an accident chlorine alkali liquor circulating tank, a tail gas distribution table, a water seal and a tail gas fan, the collecting pipeline is connected with the secondary sodium tank group; the first pipeline is connected with the second pipeline, the second pipeline is connected with the third pipeline, and the third pipeline is connected with the sodium hypochlorite reaction tower; the sodium hypochlorite reaction tower is respectively connected with the tail gas distribution table and the accident chlorine tower; the tail gas distribution table is connected with the water seal; the water seal is connected with the sodium hypochlorite reaction tower; the accident chlorine tower is connected ...

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23-06-2023 дата публикации

Synthesis method of tetranitropyrazolotetrazine energetic material

Номер: CN116284010A
Принадлежит:

The invention discloses a synthesis method of 1, 2, 9, 10-tetranitropyrazol [1, 5-d: 5 ', 1'-f] [1, 2, 3, 4] tetrazine, and belongs to the field of energetic material synthesis. According to the invention, 2H, 2 'H-3, 3'-bipyrazole is used as a raw material, and the energetic material is prepared through one-step nitrification, amination and oxidation. The method has the advantages of short reaction route, good stability, high safety and the like, and can effectively solve the problems of lengthy synthesis route, low yield, environmental unfriendliness and the like in the prior art.

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24-12-2014 дата публикации

Preparation method of modified porous silicon dioxide anti-reflection coating

Номер: CN104230178A
Принадлежит:

The invention relates to a preparation method of a modified porous silicon dioxide anti-reflection coating. The preparation method comprises the following steps: preparing a coating fluid by adopting a method of doping methyl triethoxysilane to tetraethoxysilane for base catalysis and then acid catalyst, wherein the coating fluid is suitable for a roller painting method or a spray method or a dip-coating method or a spin-coating method; coating a substrate with a porous silicon dioxide coating; and carrying out high-heat treatment to obtain the porous silicon dioxide coating. The coating prepared by the preparation method disclosed by the invention has the characteristics of contamination resistance, high hardness, high chemical stability, good self-cleanness and reflection resistance of broadband.

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07-01-2015 дата публикации

Meter-scale raster glass photoresist precision coating method

Номер: CN104267579A
Принадлежит:

The invention discloses a meter-scale raster glass photoresist precision coating method. The method comprises the following steps: preparing photoresist, placing the photoresist into a pressure tank, spraying the photoresist in the pressure tank out from a spray gun nozzle by utilizing compressed air, spraying the photoresist on a piece of meter-scale raster glass in a reciprocating manner to form a wet membrane, rotating the meter-scale raster glass so as to spin the photoresist, and drying the meter-scale raster glass in a drying oven. By adopting the method, the meter-scale raster glass can be highly uniformly and precisely coated with the photoresist.

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25-05-2011 дата публикации

Method for preparing porous silicon dioxide antireflective film with controllable refractive index

Номер: CN0101531468B
Принадлежит:

The invention provides a method for preparing porous silicon dioxide antireflective film with controllable refractive index, which adopts the method of first base catalysis and then acid catalysis for preparing coating liquid and is suitable for dip coating or spraying process or spin-coating method. Porous silicon dioxide basement film layer is coated on a base plate; and the base plate with porous silicon dioxide basement film layer is processed under high temperature so as to obtain the silicon dioxide film layer. The film layer which is prepared by the invention has the advantages of highhardness, high chemical stability, good self-cleaning capability and broadband antireflection.

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04-08-2023 дата публикации

Synthesis method of 5, 6-dichlorofurazan [3, 4-b] pyrazine

Номер: CN116535420A
Принадлежит:

The invention provides a synthesis method of 5, 6-dichlorofurazan [3, 4-b] pyrazine, which is characterized in that DHFP is used as a raw material, and POCl3 is used as a reaction solvent and a chlorination reagent; the method takes an amine reagent as a catalyst. According to the method, highly toxic PCl5 with extremely high corrosivity is not used as a chlorination reagent any more, only POCl3 which is simpler and easier to obtain is used, and the PCl5 element is reduced. POCl3 has the effect of'one arrow for two purposes' in a reaction system, can be used as a reaction solvent and can also be used as a chlorination reagent. According to the invention, cheap and easily available N, N-dimethylformamide is introduced into a reaction system as a catalyst, so that the reaction yield is greatly improved. The synthesis method disclosed by the invention is simple, and the yield is relatively high and can reach 68% at most.

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07-04-2023 дата публикации

Compound 3, 3 ', 5, 5'-tetraamino-4, 4 '-dinitro-1, 1'-bipyrazole and preparation method thereof

Номер: CN115925631A
Принадлежит:

The invention discloses a compound 3, 3 ', 5, 5'-tetraamino-4, 4 '-dinitro-1, 1'-bipyrazole and a preparation method of the compound 3, 3 ', 5, 5'-tetraamino-4, 4 '-dinitro-1, 1'-bipyrazole. According to the method, 3, 5-diamino-4-nitropyrazole is used as a raw material, and under the action of an oxidizing agent and alkali, a target product is obtained in one step through heterocyclic N-center free radicals. The target product has high enthalpy of formation and detonation performance, the preparation method is simple and efficient, the process is green and pollution-free, and the yield is as high as 90%.

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15-04-1992 дата публикации

PROCESS FOR PRODUCTION OF SOLID POLYIRON SULFATE

Номер: CN0001060278A
Принадлежит:

Ferrous sulfate is used as raw material. Through two-step control procedure, low-temp. dewatering at 50-80 deg.C and high-temp. oxidization at 500-600 deg.C, an intermediate is obtained, which is then telomerized with H2SO4 under the existance of fine-adjusting control agent to obtain solid polyiron sulfate. Through samming treatment, it can be used for water supply or the treatment of industrial waste water. The proportioning of fine adjusting agent is NaCl: 30% H2O2=5:6-8 and the ratio of intermediate to fine adjusting agent is 1000:1-3.

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30-06-2023 дата публикации

Strong pi electron delocalization alpha, beta-unsaturated nitrile and preparation method thereof

Номер: CN116354852A
Принадлежит:

The invention discloses a strong pi electron delocalization alpha, beta-unsaturated nitrile and a preparation method thereof. The strong pi electron delocalization alpha, beta-unsaturated nitrile is a compound (Z)-3-amino-2-nitroacrylonitrile. The invention also discloses a preparation method of (Z)-3-amino-2-nitroacrylonitrile, which comprises the following steps: by taking 5-amino-4-nitro-3-azido-1H-pyrazole as an initial raw material and 1, 4-dioxane as a solvent, carrying out thermal cracking denitrification reaction, and then purifying by silica gel column chromatography to obtain (Z)-3-amino-2-nitroacrylonitrile. As the compound has high thermal stability, strong pi electron delocalization characteristic and excellent reaction activity, the compound is a very important synthon and intermediate in organic synthesis. And the preparation method is simple, high in yield and conversion rate, green and pollution-free, and has wide application prospects in biochemistry, medicinal chemistry ...

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02-03-2005 дата публикации

Method for preparing anti-explosion partition glass surface anti-reflection film

Номер: CN0001587150A
Принадлежит:

The preparation process of anti-reflection film on the surface of anti-explosion partition glass is one sol-gel process of preparing wide spectrum anti-reflection TiO2/SiO2 film. The present invention features that the anti-reflection TiO2/SiO2 film is prepared with butyl titanate and ethyl metasilicate as main material to form TiO2 and SiO2 sol, which is then coated. The anti-reflection film is double layered film of TiO2 layer and SiO2 layer. In the spectral area of 450-900 nm, the anti-reflection film makes the average transmittance from 92 % before coating to over 98 %, and the corresponding main amplifier has gain raised by about 6.5 %. The film can resist strong illumination, and has no damage after over one hundred times of xenon lamp discharge.

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16-09-2009 дата публикации

Method for preparing porous silicon dioxide antireflective film with controllable refractive index

Номер: CN0101531468A
Принадлежит:

The invention provides a method for preparing porous silicon dioxide antireflective film with controllable refractive index, which adopts the method of first base catalysis and then acid catalysis for preparing coating liquid and is suitable for dip coating or spraying process or spin-coating method. Porous silicon dioxide basement film layer is coated on a base plate; and the base plate with porous silicon dioxide basement film layer is processed under high temperature so as to obtain the silicon dioxide film layer. The film layer which is prepared by the invention has the advantages of high hardness, high chemical stability, good self-cleaning capability and broadband antireflection.

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