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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 3. Отображено 3.
25-07-2023 дата публикации

Catalyst for catalytic synthesis of lactide, preparation method and method for catalytic synthesis of lactide

Номер: CN116474825A
Автор: TIAN BO, HE YAN, SUN QIKUI, TANG SHUO
Принадлежит:

The invention discloses a catalyst for catalytic synthesis of lactide, a preparation method and a method for catalytic synthesis of lactide, the catalyst is prepared by a sol-gel method to obtain a ZnO-SnO substrate, and SO4 < 2-> is introduced for modification; meanwhile, in the process of preparing the catalyst, the polymerization inhibitor shown in the formula I is loaded on the catalyst. The prepared catalyst is high in thermal stability, easy and convenient to regenerate and capable of replacing an organic zinc/tin catalyst. The catalyst is used for high-temperature depolymerization of a lactic acid prepolymer to obtain lactide, the product yield is high, the optical purity is high, no high-molecular-weight kettle residue polymer is generated, the influence of the high-molecular-weight kettle residue polymer on recycling is avoided, the reaction process can be effectively simplified, the production cost is reduced, and the method is suitable for industrial production.

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Номер записи: 1
02-06-2023 дата публикации

Method for separating and purifying lactide from crude lactide

Номер: CN116199664A
Автор: WEI SHUXIN, HE YAN, TIAN BO, JIANG XUMIN, SUN QIKUI
Принадлежит:

The invention provides a method for separating and purifying lactide from crude lactide, which can evaporate, separate and purify lactide under normal pressure and can efficiently purify lactide. The method comprises the following steps: 1) a crude lactide material is introduced into a heating pipe of the falling film evaporator, the crude lactide material flows along the inner wall of the hot heating pipe from top to bottom in a film shape, and the inner wall of the heating pipe is uneven; hot inert gas is introduced into the heating pipe from bottom to top, the inert gas is in countercurrent contact with the crude lactide material in the heating pipe, and the crude lactide material is separated into a light component branch stream and a heavy component branch stream in the falling film evaporator; and 2) the light component flow flows out of the falling-film evaporator along with the inert gas, the light component flow is sent into a multi-stage condensation unit for condensation treatment ...

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Номер записи: 2
02-12-2015 дата публикации

Cold platform truck wheel of ring draws horse with dismantling

Номер: CN0204819352U
Автор: LYU MINGXI, ZHANG QINGHUI, SUN QIKUI
Принадлежит:

The utility model provides a cold platform truck wheel of ring draws horse with dismantling, including ejector pin (11), fixing base (12) and connecting piece, wherein: ejector pin (11) are advanced end (112) and are located screw thread interlude (113) between the two including turn -knob end (111), top, be provided with screw hole (122) and first connecting hole (121) on fixing base (12), the top is advanced end (112) and is used for passing screw hole (122) and platform truck shaft (14) counterbalance cooperation, screw thread interlude (113) and screw hole (122) threaded connection, the connecting piece is connected in order to realize fixing base (12) and ring cold platform truck wheel (13) fixed linking to each other with the second connecting hole on first connecting hole (121) and ring cold platform truck wheel (13). The utility model provides a cold platform truck wheel of ring draws horse with dismantling can solve great, the higher problem of dismantlement cost of the dismantlement ...

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Номер записи: 3