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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 3. Отображено 3.
25-08-2023 дата публикации

Production method of coal-based pitch-based melt-blown carbon fibers

Номер: CN116641159A
Автор: ZHANG HAIXIA, YAN GUILIN, ZHANG LIN, YAO DEGANG, FENG GUANGQIANG, YAN PING, YU PING
Принадлежит:

The invention discloses a production method of coal-based pitch-based melt-blown carbon fibers, and belongs to the field of preparation of novel carbon materials. The method specifically comprises the following steps: heating coal-based spinning pitch serving as a raw material through a screw machine, then obtaining melt-blown carbon fiber precursors through a spinneret plate under the action of gravity and micro-positive pressure, and finally preparing the coal-based pitch-based melt-blown carbon fibers through oxidation and carbonization. The production method is simple in production process and low in cost, and the prepared melt-blown carbon fiber has stable and excellent physicochemical and mechanical properties.

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Номер записи: 1
28-07-2023 дата публикации

System and method for deeply removing ash content from naphthalene-based synthetic asphalt

Номер: CN116496807A
Автор: YAN PING, YU PING, ZHANG HAIXIA, BAI HAITAO, ZHANG LIN, YAN GUILIN, MOU CHAO
Принадлежит:

The invention discloses a system and a method for deeply removing ash from naphthalene-based synthetic asphalt, and belongs to the technical field of deep processing of asphalt products. The system comprises a solvent storage tank, a dissolving kettle, a high-speed centrifugal machine, a distillation kettle and a heat-conducting oil furnace, the solvent storage tank, the dissolving kettle, the high-speed centrifugal machine and the distillation kettle are sequentially connected through pipelines, and the distillation kettle is circularly connected with the heat-conducting oil furnace through a pipeline. The invention relates to a method for deeply removing ash in naphthalene-based synthetic asphalt. The method comprises the following steps: dissolving asphalt at low temperature; performing high-speed centrifugal separation; and performing negative-pressure distillation. The naphthalene-based synthetic asphalt obtained by the system and the method disclosed by the invention is low in ash ...

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Номер записи: 2
25-08-2023 дата публикации

Preparation method of mesophase pitch precursor

Номер: CN116640592A
Автор: YU PING, YAN PING, ZHANG HAIXIA, YAN GUILIN, ZHANG LIN, BAI HAITAO, MOU CHAO
Принадлежит:

The invention discloses a preparation method of a mesophase pitch precursor, which comprises the following steps: (1) crushing coal liquefied pitch, mixing with a solvent, heating, stirring and extracting; (2) carrying out centrifugal separation to respectively obtain a supernatant A and a heavy residue A; (3) carrying out high-speed centrifugal separation on the supernatant A to respectively obtain a supernatant B and a heavy residue B; (4) distilling the supernate B to recover the solvent, so as to obtain a mesophase pitch precursor; and (5) simultaneously, mixing the heavy slag A and the heavy slag B, and removing a solvent and volatile matters in a screw rod heating manner to obtain the coal pitch. According to the method, the coal liquefied pitch with high ash content and high quinoline content is taken as a raw material, polycyclic aromatic hydrocarbon is extracted, quinoline heavy slag is separated out, and inorganic ash content is removed through a solvent extraction and centrifugal ...

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Номер записи: 3