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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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Применить Всего найдено 5. Отображено 5.
02-05-2023 дата публикации

Comprehensive recycling method for enriching phosphorite magnesium removal liquid by nitric acid method

Номер: CN116040662A
Автор: YANG XIUSHAN, ZHANG ZHIYE, WU JUNHU, XU DEHUA, YUAN JINGHUA
Принадлежит:

The invention relates to a comprehensive recycling method for enriching phosphorite magnesium removal liquid through a nitric acid method, and belongs to the technical field of chemical engineering. The method comprises the following steps: mixing the nitric acid process phosphorite magnesium removal liquid with lime milk, reacting for 60-120 minutes at the temperature of 60-80 DEG C, carrying out solid-liquid separation to obtain a solid A and a liquid A, and enabling the addition amount of the lime milk to be stable for 10-15 minutes when the pH value is 6.0-6.5 at the reaction end point; concentrating the liquid A at the temperature of 50-80 DEG C and the pressure of 20-100KPa until CaO in the liquid is 12-16% to obtain liquid B; and mixing the liquid B with a decalcifying agent, completely reacting at 60-80 DEG C, carrying out solid-liquid separation to obtain a solid C and a liquid C, carrying out subsequent treatment on the liquid C to obtain magnesium nitrate, and washing and drying ...

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Номер записи: 1
04-07-2023 дата публикации

Preparation method of iron phosphate

Номер: CN116374979A
Автор: YANG XIUSHAN, GU RENQUAN, ZHANG ZHIYE, XU DEHUA
Принадлежит:

The invention relates to a preparation method of iron phosphate, and belongs to the technical field of new energy battery raw materials. The technical problem to be solved by the invention is to provide a preparation method of high-quality iron phosphate with high yield. The preparation method comprises the following steps that ferric nitrate crystals and a phosphoric acid solution are mixed and react for 30 min or above at the temperature of 120-200 DEG C, ferric phosphate crystals are obtained, and the concentration of the phosphoric acid solution is larger than or equal to 85 wt%. The preparation method of the battery-grade iron phosphate can be provided aiming at the requirement on high-quality iron phosphate at present, the method is simple and high in yield, the obtained iron phosphate is high in purity and stable in performance, the process cost is reduced from the source, and the process route has great economic value.

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Номер записи: 2
03-11-2004 дата публикации

连接器线缆结构

Номер: CN0001174439C
Автор: XU DEHUA HUANG, DEHUA,HUANG XU, 许德华
Принадлежит:

... 本发明公开一种连接器线缆结构，该线缆由若干条细线缆所包覆而成，其包括在最内层设置的若干条细线缆，在这些细线缆外包覆有第一隔离层，该第一隔离层为铝箔材质，在第一隔离层外包覆有第二隔离层，而在第一隔离层与第二隔离层之间另设一条接地线，在第二隔离层外缘包覆有一绝缘层，其中该第二隔离层是导电塑胶材料，相较于采用铜编织层的现有技术，降低制造成本及工时成本，提高电气特性及防EMI电磁干扰能力。 ...

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Номер записи: 3
04-07-2023 дата публикации

Method for preparing iron phosphate

Номер: CN116374978A
Автор: YANG XIUSHAN, GU RENQUAN, ZHANG ZHIYE, XU DEHUA
Принадлежит:

The invention relates to a method for preparing iron phosphate, and belongs to the technical field of wet-process phosphoric acid subsequent preparation processes. The technical problem to be solved by the invention is to provide a method for preparing iron phosphate. The method comprises the following steps: a, mixing calcium nitrate, ferrous sulfate and water to obtain a mixed solution, reacting the mixed solution at 40-80 DEG C for 0.5-1 hour, and filtering to obtain a calcium sulfate precipitate and a ferrous nitrate solution; b, mixing the ferrous nitrate solution with dilute nitric acid, reacting for 0.5-1.5 hours at the temperature of 50-80 DEG C to obtain a ferric nitrate solution, and then concentrating and crystallizing to obtain ferric nitrate crystals; and c, mixing the ferric nitrate crystals with concentrated phosphoric acid, and reacting at 120-200 DEG C for more than 30 minutes to obtain ferric phosphate crystals and nitric acid, with the concentration of the concentrated ...

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Номер записи: 4
02-05-2023 дата публикации

Method for comprehensively utilizing phosphoric acid by nitric acid process and wet process

Номер: CN116040596A
Автор: YANG XIUSHAN, ZHANG ZHIYE, YUAN JINGHUA, WU JUNHU, XU DEHUA
Принадлежит:

The invention relates to a method for comprehensively utilizing phosphoric acid by a nitric acid process and a wet process and belongs to the technical field of chemical engineering. The method for preparing the fine phosphate from the nitric acid process wet-process phosphoric acid comprises the following steps: firstly, mixing the nitric acid process wet-process phosphoric acid with sulfuric acid, and performing solid-liquid separation after complete reaction to obtain filtrate A and a solid A; evaporating 50-70% of nitrogen in the filtrate A, adding sulfuric acid, and performing solid-liquid separation after complete reaction at 50-80 DEG C to obtain filtrate B and a solid B; evaporating residual nitrogen from the filtrate B to obtain a solution C; wherein the use amount of the sulfuric acid in the step a is 70-100% of the theoretical use amount, and the use amount of the sulfuric acid in the step b is 0-30% of the theoretical use amount. By adopting the method disclosed by the invention ...

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Номер записи: 5