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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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Применить Всего найдено 4. Отображено 4.
01-08-2023 дата публикации

Method for reducing impurity content of organic phosphite ester, prepared organic phosphite ester and application

Номер: CN116514871A
Автор: SUI SHANHONG, LI SHUANG, ZHU LIQIN, DONG YAN
Принадлежит:

The invention provides a method for reducing the impurity content of organic phosphite ester, the prepared organic phosphite ester and application of the organic phosphite ester. The method comprises the following steps: mixing a phosphite ester solid with a dispersing agent, adding an aqueous solution, carrying out liquid-solid extraction, extracting water-soluble impurities such as phosphorous acid and phosphoric acid into a water phase, carrying out solid-liquid separation, and leaching the solid with an organic solvent to fully remove water on the surface of a sample. And drying to obtain the purified organic phosphite ester solid with low impurity content. By adding the dispersing agent, the contact between the aqueous solution and phosphite ester can be enhanced, and the extraction rate of water-soluble impurities such as phosphorous acid and the like is effectively improved. The method for reducing the impurity content of the organic phosphite is simple, effective and high in yield ...

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Номер записи: 1
05-05-2023 дата публикации

Preparation method and application of phosphoramidite ester

Номер: CN116063351A
Автор: DONG YAN, LI SHUANG, ZHU LIQIN, BAO TIANSHU, SUI SHANHONG
Принадлежит:

The invention provides a preparation method and application of a phosphoramidite ester ligand taking pyrrolyl as a substituent group. According to the preparation method, phosphorus trichloride, 2, 2 '-diphenol and pyrrole are taken as raw materials, and the phosphoramidite ester ligand is directly prepared in one step under the action of an acid-binding agent. The method has the advantages of simple process, high yield, simple post-treatment and the like, the product is stable in structure and easy to store, and the obtained phosphoramidite ester has great potential application value in olefin hydroformylation catalytic reaction, so that the method is expected to realize large-scale industrial application in the field of organic synthesis.

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Номер записи: 2
05-05-2023 дата публикации

Method and device for preparing 2-propyl-2-heptenal and obtained 2-propyl-2-heptenal

Номер: CN116063167A
Автор: LI SHUANG, SUI SHANHONG, DONG YAN
Принадлежит:

The invention relates to a method and device for preparing 2-propyl-2-heptenal, and the method comprises the following steps: carrying out multi-step cascade reaction on n-valeraldehyde, optional 2-methylbutyraldehyde and a catalyst, and then carrying out chromatographic separation to obtain the 2-propyl-2-heptenal. The invention solves the technical problems that the aldol condensation reaction adopts a single kettle-rectifying tower process in the prior art, the temperature of the reaction kettle is higher, and higher selectivity is pursued by short residence time when the air speed of liquid is increased. By adopting a continuous double-kettle series connection process, the valeraldehyde conversion rate and selectivity higher than those of an existing single-kettle-rectifying tower process can be obtained at a lower temperature.

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Номер записи: 3
05-05-2023 дата публикации

High-carbon olefin hydroformylation method and application thereof

Номер: CN116063162A
Автор: ZHU LIQIN, LI SHUANG, SUI SHANHONG, DONG YAN, BAO TIANSHU
Принадлежит:

The invention discloses a hydroformylation method of high-carbon olefin and application of the hydroformylation method. According to the method, high-carbon olefin is subjected to a hydroformylation reaction in an ionic liquid by adopting a catalyst, the catalyst comprises a rhodium compound and an organic phosphine ligand, and organic phosphine is organic phosphite. According to the method, the catalyst and the product aldehyde are separated at room temperature in a simple phase separation mode, the conventional thermal separation mode is changed, and the separation temperature is reduced, so that the catalyst is effectively protected.

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Номер записи: 4