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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.
23-05-2023 дата публикации

Method for preparing lignin-based 3-ethyl adipic acid or 3-propyl adipic acid

Номер: CN116143607A
Автор: HU RUIJIA, ZHU CHENJIE, HUANG ZHIMIN, YING HANJIE, LI YANMING, MO QIUFENG, ZHENG YIHUA, XU MENGXUE, LIU WANYU, HUANG YIFENG
Принадлежит:

The invention discloses a method for preparing lignin-based 3-ethyl adipic acid or 3-propyl adipic acid, which comprises the following step: carrying out oxidation reaction on naphthenic alcohol and/or naphthenic hydrocarbon with a catalyst and an oxidant to obtain 3-ethyl adipic acid or 3-propyl adipic acid. According to the preparation method provided by the invention, integration of lignin depolymerization and lignin depolymerization product reduction can be realized, and lignin-based 3-ethyl adipic acid or 3-propyl adipic acid can be finally prepared through oxidation. The method provided by the invention can greatly improve the selectivity of lignin-based 3-ethyl adipic acid and 3-propyl adipic acid, and the selectivity is as high as 98%.

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Номер записи: 1
04-07-2023 дата публикации

All-lignocellulose-based polyester and preparation method thereof

Номер: CN116375986A
Автор: HU RUIJIA, ZHU CHENJIE, HUANG ZHIMIN, YING HANJIE, LI YANMING, MO QIUFENG, ZHENG YIHUA, XU MENGXUE, MA LANYU, LAI WENQIN
Принадлежит:

The invention discloses full lignocellulose-based polyester and a preparation method thereof.The polyester is shown in the formula I. The preparation method of the polyester comprises the following steps that S1, lignin or lignocellulose is subjected to a depolymerization reaction, and a lignin depolymerization product and delignified fiber residues are obtained; s2, the lignin depolymerization product obtained in the step S1 is subjected to a reduction reaction and an oxidation reaction, and 3-propyl adipic acid is obtained; s3, performing enzymolysis on the fiber residues obtained in the step S1 to prepare sugar, and performing fermentation to obtain 1, 4-butanediol and 2, 5-furandicarboxylic acid; and S4, carrying out esterification reaction and condensation polymerization on the 3-propyl adipic acid obtained in the step S2, the 1, 4-butanediol obtained in the step S3 and the 2, 5-furandicarboxylic acid to obtain the product. According to the invention, the lignocellulose is used as ...

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Номер записи: 2
30-05-2023 дата публикации

Special microwave modified calcite powder for polypropylene and preparation method of microwave modified calcite powder

Номер: CN116178836A
Автор: HUANG YIFENG, HUANG ZHIMIN, MA LANYU, XU MENGXUE, ZHENG YIHUA, MO QIUFENG, MO SONGBAI, LAI WENQIN
Принадлежит:

The invention discloses microwave modified calcite powder special for polypropylene. The microwave modified calcite powder is prepared from, by mass, 120-180 parts of calcite powder, 40-60 parts of graphene liquid, 3-5 parts of hexadecyl sulfate and 1-3 parts of coupling agent. The coupling agent is any one of a silane coupling agent or titanate. The preparation method of the modified calcite powder comprises the following steps: weighing the raw materials according to the proportion, then stirring and mixing the calcite powder, the graphene liquid, the hexadecyl sulfate and the coupling agent at a high speed for 15-25 minutes at the temperature of 90-120 DEG C under a microwave condition, then stirring at a low speed for 3-5 minutes, cooling and discharging. And drying the modified calcite powder and polypropylene, mixing according to a ratio, uniformly mixing, granulating in a double-screw extruder, and carrying out injection molding to obtain the composite material. The technical problem ...

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Номер записи: 3