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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

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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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 14. Отображено 14.
23-09-2015 дата публикации

Preparation method for 2-methylmercapto-4-thrifluoromethyl benzoate

Номер: CN104926702A
Автор: QUAN CHUNSHENG, WANG YAN, LUO XIANFU, LI PING, ZANG YANGLING, WANG YU
Принадлежит:

The invention discloses a preparation method for 2-methylmercapto-4-thrifluoromethyl benzoate. The method comprises the following steps: using 2-methylmercapto-4-trifluoromethylbenzonitrile as a raw material; then under atmospheric pressure, carrying out hydrolysis and esterification reactions with methanol as the raw material and a solvent under acid condition provided by a H2SO4 aqueous solution; and using a one-pot method so as to prepare 2-methylmercapto-4-thrifluoromethyl benzoate, wherein the 2-methylmercapto-4-thrifluoromethyl benzoate has a mass content of 96.8% to 99.2% and a yield of 92.9% to 98.5%, and has a reaction formula as shown in the specification. The preparation method provided by the invention improves and innovates synthetic raw materials and reaction conditions; and 2-methylmercapto-4-thrifluoromethyl benzoate is prepared by directly subjecting 2-methylmercapto-4-trifluoromethylbenzonitrile to hydrolysis and esterification reactions under the acid condition; thus, ...

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Номер записи: 1
12-02-2014 дата публикации

Preparation method of polycarbonate

Номер: CN103570931A
Автор: QIU DEYUE, ZANG YANGLING, LIU GUOWEN, WANG XIAOGUANG, HUANG MINGZHI, MAO CHUNHUI, LIAO LANGUI, YANG MEI, HUANG YOUYUAN, ZHOU JINPING, WANG YAN, WANG ZHIKAI
Принадлежит:

The invention discloses a preparation method of polycarbonate (PC). The preparation method comprises the following steps of: reacting alkali liquor, bisphenol A (also called BPA), a molecular weight regulator and sodium sulfite along with agitating to generate a BPA alkali salt; adding an active reaction substance, namely, 4-hydroxybenzyl chloride or p-hydroxylbenzyl quaternary ammonium salt, to pre-polymerize with a phosgene solution to obtain a prepolymer; adding alkali liquor to perform condensation polymerization to obtain the PC with molecular weight of 5000 to 100000, wherein if the active reaction substance is 4-hydroxybenzyl chloride, tertiary amine is added first during the condensation polymerization. According to the preparation method, the molecular weight and the molecular weight distribution of PC can be controlled through the ratio of the added molecular weight regulator; the active reaction substance is added during the pre-polymerization, and thus a polymer containing quaternary ...

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Номер записи: 2
25-04-2023 дата публикации

Insecticidal composition as well as preparation method and application thereof

Номер: CN115997778A
Автор: LI MIN, LIU WEIDONG, LIU WEI, ZENG XUEYUN, CHEN CAN, WANG ZHENZHOU, DU SHENGHUA, CHEN MING, ZANG YANGLING, ZHONG JIE
Принадлежит:

The invention discloses an insecticidal composition as well as a preparation method and application thereof, and the preparation comprises the following effective components in parts by weight: 1-35 parts of bendiocarb and 1-35 parts of hexaflumuron. The insecticidal composition disclosed by the invention has excellent insecticidal activity, has a remarkable synergistic effect on preventing and treating mosquitoes, houseflies, cockroaches, fleas and the like in sanitary pests, and is high in insecticidal activity, the service life of the insecticide is prolonged, and environmental pollution is reduced.

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Номер записи: 3
26-03-2014 дата публикации

2-cyanophenol preparing method

Номер: CN103664698A
Автор: ZHOU YONG, ZANG YANGLING, CHEN MING, ZHOU JINPING, HUANG WEI
Принадлежит:

The invention discloses a 2-cyanophenol preparing method which is implemented by steps that salicylamide and phosgene are subjected to continuous reactions by a recycling continuous reaction system under the action of a catalyst dioxane and a solvent toluene. According to the method, a tubular reactor is adopted, the provided heat transfer specific surface area is large, the contact area of phosgene and a liquid-state material is increased, heat is transferred timely to a reactant, reaction temperature control is facilitated, and a fast reaction requirement is met. Transition-state continuous reaction is promoted through enhancement of mass transfer of a gas-liquid heterogeneous material, a forward reaction process is facilitated, and the reaction time is shortened; a material circulation mode of a raw material mixer, the tubular reactor and an insulation kettle is adopted, so that a gas-solid-liquid three-phase reaction formation is converted into a gas-liquid two-phase reaction formation ...

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Номер записи: 4
24-11-2010 дата публикации

Method for recycling methylamine hydrochloride

Номер: CN0101891652A
Автор: QIANZHENG XIONG, XUHUI XIAO, YANGLING ZANG, XIAOHONG KONG, PING LI, YAN WANG, YONGQIANG YANG, HONGJIAN GAO, XIONG QIANZHENG, XIAO XUHUI, ZANG YANGLING, KONG XIAOHONG, LI PING, WANG YAN, YANG YONGQIANG, GAO HONGJIAN
Принадлежит:

The invention discloses a method for recycling methylamine hydrochloride to prepare methylamino formyl chloride. The methylamino formyl chloride is prepared by adopting a high-pressure reaction, using an organic solvent as a reaction solvent, and reacting the methylamine hydrochloride with phosgene, wherein the yield in terms of the methylamine hydrochloride is more than or equal to 90.0 percent. The method for recycling the methylamine hydrochloride has a simple process and a mild reaction condition; the used solvent is suitable for industrialized requirements; and reaction solution is directly used without purification after filtration and phosgene removal, and the three-waste amount is greatly reduced.

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Номер записи: 5
12-05-2023 дата публикации

Refining method of high-quality pirimiphos-methyl

Номер: CN116102595A
Автор: LUO XIANFU, LIU WEIDONG, GAN XINGLI, DU SHENGHUA, CHEN MING, WANG YAN, ZANG YANGLING, WANG SHENGDE, GAO YUNYING, ZHU YINHAI
Принадлежит:

The invention discloses a refining method of high-quality pirimiphos-methyl, which comprises the following steps: mixing a crude product of pirimiphos-methyl with a low alcohol and a diluted hydrochloric acid solution, and carrying out heat preservation stirring at 20-40 DEG C for 0.5-2 hours; and cooling the solution to-10 DEG C to 0 DEG C for crystallization, filtering, mixing a filter cake with methyl isobutyl ketone, heating to 45 DEG C to 65 DEG C, and desolventizing under reduced pressure to obtain the high-quality pirimiphos-methyl. In the high-quality pirimiphos-methyl obtained by the refining method, the main content is greater than or equal to 99.13%, the content of iso-pirimiphos is controlled to be 0.3% or below, the content of other impurities is controlled to be 0.1% or below, the yield is greater than or equal to 96.5%, the operation is simple, and industrial production is easy.

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Номер записи: 6
23-07-2014 дата публикации

Polycarbonate process wastewater treatment method

Номер: CN103936216A
Автор: YANG MEI, WANG XIAOGUANG, MAO CHUNHUI, ZANG YANGLING, LIAO LANGUI, WANG YAN, QIU DEYUE, LIU GUOWEN
Принадлежит:

The invention discloses a polycarbonate process wastewater treatment method using a two-stage countercurrent continuous extraction system. The two-stage countercurrent continuous extraction system comprises a mixing kettle, a peristaltic pump, a centrifuge, an evaporator, a mixing kettle, a wastewater storage pot and a resin adsorption tower. A solvent used for synthesizing polycarbonate is used as an extractant, a feeding volume ratio of the extractant to wastewater is 0.08-0.1:1, and a feeding mass-to-volume ratio of resin to wastewater is 0.025:1. The resin used for adsorption is polystyrene resin. The method has the advantages of recycling of phenol substances in wastewater, less consumption of the extractant, low wastewater treatment cost and easy industrial amplification. The recovered phenol substances can be used for synthesizing polycarbonate, and treated brine can be directly discharged, or can be discharged to high salt environment, or can be used for the preparation of sodium ...

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Номер записи: 7
09-11-2011 дата публикации

Purification technique of 9-fluorenylmethoxycarbon succinimide ester

Номер: CN0101096356B
Автор: JIANBING XU, YANGLING ZANG, XINGWU YANG, CHANGWEI TU, ZHIMOU DENG, XU JIANBING, ZANG YANGLING, YANG XINGWU, TU CHANGWEI, DENG ZHIMOU
Принадлежит:

The invention discloses a purifying method of 9-fluorenylmethothoxycarbonyl succinimide ester (FMOC-OSu)through deionized water under low temperature, which is characterized by the following: simplifying the purifying technique with mild condition; circulating the raw material completely with high receiving rate; fitting for industrialized manufacturing; improving the product purity with low single impurity content; controlling the impurity generation of 9-fluoremethylene effectively; satisfying the need to protect amino acid in the polypeptide synthesizing course.

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Номер записи: 8
12-02-2014 дата публикации

Method for preparing 2-(3,4-dimethoxymethyl)-3-methylbutylnitrile

Номер: CN103570583A
Автор: LUO XIANFU, WANG YU, MAO CHUNHUI, CHEN MING, ZANG YANGLING
Принадлежит:

The invention discloses a method for preparing 2-(3,4-dimethoxymethyl)-3-methylbutylnitrile from a benzofuranol byproduct 4-(2-methallyl)-1,2-benzenediol serving as a raw material. A chemical reaction equation is shown in the specification. According to the method, the 2-(3,4-dimethoxymethyl)-3-methylbutylnitrile content is high, and the mass content is 98.5 to 99.5 percent; the product 2-(3,4-dimethoxymethyl)-3-methylbutylnitrile is high in yield, and the overall yield is 65.6 to 79.7 percent; the byproduct 4-(2-methallyl)-1,2-benzenediol produced in a benzofuranol production process is used as a starting raw material, so that the raw material is readily available, the method is low in cost and favorable for industrial production, and has environment-friendly benefits, and a process is simple.

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Номер записи: 9
26-08-2009 дата публикации

Preparation method of o-isopropoxyphenol

Номер: CN0101514147A
Автор: WANG YU, WANG XIAOGUANG, YANG CHUNHUA, ZHANG JIANYU, XU JIANBING, ZANG YANGLING, XIAO XUHUI, LI PING, KONG XIAOHONG, WANG YAN, LUO XIANFU, YU WANG, XIAOGUANG WANG, CHUNHUA YANG, JIANYU ZHANG, JIANBING XU, YANGLING ZANG, XUHUI XIAO, PING LI, XIAOHONG KONG, YAN WANG, XIANFU LUO
Принадлежит:

The invention discloses a preparation method of o-isopropoxyphenol. The method is characterized by taking catechol and 2-chloropropane as raw materials, taking a binary-immiscible organic solvent system as a reaction solvent, and preparing the o-isopropoxyphenol by reaction at normal pressure or slight positive pressure in the presence of an acid binding agent and a catalyst. The reaction yield is more than or equal to 94.0% (based on the catechol). The preparation method has the advantages of cheap raw materials, simple process, mild reaction condition, industrialization applicable solvent and low content of the catechol in the reaction solution, thus reducing difficulty of product refinement and greatly reducing energy consumption and three-waste volume.

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Номер записи: 10
01-07-2015 дата публикации

Method for preparing isophthaloyl dichloride

Номер: CN104744232A
Автор: LIU GUOWEN, ZHOU JINPING, WANG YAN, ZANG YANGLING
Принадлежит:

The invention discloses a method for preparing isophthaloyl dichloride. The method comprises the steps of performing reaction on isophthalic acid serving as a raw material, N-phenyl-N-methylbenzamide or 4-dimethylamino-pyridine serving as a catalyst, dichloroethane or methylbenzene, chlorobenzene and xylene serving as a reacting solvent, phosgene COCl2 serving as a chlorinating agent; driving hydrogen chloride gas generated in reaction and chlorinating agent gas which is not completely reacted with nitrogen gas; rectifying at reduced pressure to obtain 99.95% by mass of high-quality isophthaloyl dichloride. According to the preparation method, the N-phenyl-N-methylbenzamide or 4-dimethylamino-pyridine is adopted as the catalyst, the intermediate formed with phosgene is stable and cannot be remained in the solution, the color of isophthaloyl dichloride is not influenced, the main problem that the product isophthaloyl dichloride is discolored because catalyst residues is easily distilled ...

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Номер записи: 11
02-01-2008 дата публикации

Purification technique of 9-fluorenylmethoxycarbon succinimide ester

Номер: CN0101096356A
Автор: ZANG YANGLING, XU JIANBING, YANG XINGWU, TU CHANGWEI, DENG ZHIMOU, YANGLING ZANG, JIANBING XU, XINGWU YANG, CHANGWEI TU, ZHIMOU DENG
Принадлежит:

The invention discloses a purifying method of 9-fluorenylmethothoxycarbonyl succinimide ester (FMOC-OSu)through deionized water under low temperature, which is characterized by the following: simplifying the purifying technique with mild condition; circulating the raw material completely with high receiving rate; fitting for industrialized manufacturing; improving the product purity with low single impurity content; controlling the impurity generation of 9-fluoremethylene effectively; satisfying the need to protect amino acid in the polypeptide synthesizing course.

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Номер записи: 12
24-09-2014 дата публикации

Method for extracting pleocidin from saccharopolyspora spinosa fermentation liquor

Номер: CN104059117A
Автор: LUO XIANFU, ZENG XUEYUN, WANG YAN, LIU SHIMING, CHEN MING, ZANG YANGLING
Принадлежит:

The invention relates to a method for extracting pleocidin from saccharopolyspora spinosa fermentation liquor. The method comprises the following steps: (1), pre-treating saccharopolyspora spinosa fermentation liquor and carrying out solid-liquid separation; (2), adsorbing centrifuged organic substances in a water phase by an adsorbent; (3), combining solids which are centrifuged and separated for the first time and the second time, and drying in vacuum; (4), extracting pleocidin from solids; and (5), recrystallizing by using a solvent to obtain a pleocidin product, decompressing and desolventizing. According to the method disclosed by the invention, a polar solvent is not needed to be added for extracting during pre-treatment, so that usage amount of an organic solvent is greatly reduced, pollution is reduced, cost is lowered, a centrifugal method can be adopted, operation is safe and separating effect is good; moreover, the adsorbent is added into the water phase for adsorbing organic ...

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Номер записи: 13
08-10-2014 дата публикации

Preparation method of high-quality m-phthaloyl chloride

Номер: CN104086404A
Автор: LIU GUOWEN, ZHOU JINPING, WANG YAN, ZANG YANGLING
Принадлежит:

The invention aims at providing a preparation method of high-quality m-phthaloyl chloride. The preparation method comprises the following steps: reacting by taking N,N-dimethylformamide or N-phenylmethylformamide, N,N-dimethylacetamide and 4-dimethylaminopyridine as catalysts, dichloroethane, methylbenzene, benzene or dimethylbenzene as a reaction solvent and phosgene-COCl2, dispelling hydrogen chloride gas and incompletely reacted chlorinating agent gas generated in the reaction by using nitrogen gas, performing decolorizing reaction by taking an inorganic salt compound-sodium silicate, sodium chloride, sodium carbonate or sodium sulfate as a decolorizing agent, and performing reduced pressure distillation to prepare high-quality m-phthaloyl chloride with content of more than 99.95%. The preparation method is simple in process and convenient to operate; raw materials are easily available and low in cost, and the consumption of the decolorizing agent is low; as the inorganic salt compound ...

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Номер записи: 14