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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 3. Отображено 3.
28-01-2015 дата публикации

Method for preparing melamine cyanurate (MCA) by sol modification process

Номер: CN104311500A
Автор: WANG CHANGXU, WANG LIN, XIAO XUEWEN, ZHANG YAMIN, MING BAOYI
Принадлежит:

The invention discloses a method for preparing melamine cyanurate (MCA) by a sol modification process, belonging to the field of preparation of halogen-free flame retardants. According to the method, in a hydrosolvent, melamine and cyanuric acid are taken as raw materials, and a sol system is added in the synthetic process to achieve the purpose of controlling the particle size. The method comprises the following steps: during MCA reaction, adding the specific sol system, heating to a certain temperature for reacting for a period of time, thus obtaining white slurry, carrying out vacuum filtration and drying to obtain the final product. The MCA powder prepared by the method has the advantages of uniform and controllable particle size, favorable dispersity, cheap raw materials, simple and controllable preparation technique and high economic benefit.

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Номер записи: 1
01-08-2023 дата публикации

Treatment method of phenoxy cyclophosphazene synthesis wastewater

Номер: CN116514343A
Автор: XU YOUMIN, ZHANG YULIANG, GENG JIANGANG, XIAO XUEWEN, LIU TING, MING BAOYI, SUO WEI, WANG LUJING, DUAN JINFENG, WANG YANHUI
Принадлежит:

The invention discloses a treatment method of phenoxy cyclophosphazene synthesis wastewater, which comprises the following steps: modifying activated aluminum oxide powder by using a polyacrylamide aqueous solution through an impregnation method to obtain modified activated aluminum oxide; adjusting the pH value of the wastewater to 6-6.5, adsorbing and recovering phenol in the wastewater by adopting a fixed bed adsorption layer filled with modified activated aluminum oxide (when the phenol-containing wastewater passes through a layer penetrating layer, the phenol and amide in polyacrylamide are subjected to organic crosslinking, and the phenol is left in the adsorption bed layer), and carrying out low-temperature vacuum evaporation treatment on the treated wastewater, the distilled water can be recycled as condensate water, KCl salt obtained by cooling and crystallizing the concentrated solution can be treated as a byproduct, and the method not only can be used for thoroughly treating ...

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Номер записи: 2
29-08-2023 дата публикации

Method for reducing content of free melamine in MCA product

Номер: CN116655552A
Автор: LIU TING, GENG JIANGANG, XU YOUMIN, MING BAOYI, QIAO ZHICHUAN, SUO WEI, WANG LUJING, DUAN JINFENG, DONG XIANHUA, WANG YANHUI
Принадлежит:

The invention discloses a method for reducing the content of free melamine in an MCA product. The MCA is synthesized by adopting the methods of ultrasonic reaction synthesis, molar ratio feeding, raw material wetting and dispersing, filter cake washing and mother liquor recycling, the purpose of reducing the content of free melamine in the MCA product is achieved, the content of melamine in the MCA product is reduced to 0.1% or below, and the low-residue MCA product has good dispersity in PA6.

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Номер записи: 3