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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 6. Отображено 6.
23-11-2011 дата публикации

Method for synthesizing tetrahydrocarbazoles compound

Номер: CN0102249983A
Автор: HAIPING NI, QIJUN HOU, NI HAIPING, HOU QIJUN
Принадлежит:

The invention discloses a method for synthesizing a tetrahydrocarbazoles compound. The method is a green preparation method for synthesizing the tetrahydrocarbazoles compound by using phenylhydrazine hydrochloride or phenylhydrazine and cyclohexanone as raw materials and synthesizing 1,2,3,4-tetrahydrocarbazole in one step through condensation and ring-closing. The method provided by the invention comprises the following steps of: mixing the phenylhydrazine hydrochloride or phenylhydrazine, water and inorganic acid; dripping the cyclohexanone at the temperature in a range of 40-90 DEG C for 0.5-4 hours; and after dripping the cyclohexanone, keeping the heat for 0.5-3.0 hours to obtain the high-content 1,2,3,4-tetrahydrocarbazole. The method for synthesizing the 1,2,3,4-tetrahydrocarbazole is economical, simple and convenient and has the advantages of moderate reaction conditions, high yield and product purity, environmental friendliness and the like.

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Номер записи: 1
27-06-2012 дата публикации

A method for preparing o-chloro PPD

Номер: CN0101544571B
Автор: NI HAIPING, CHEN YUZHONG, HAIPING NI, YUZHONG CHEN
Принадлежит:

The invention relates to a method for preparing o-chloro PPD. In 95% ethanol solvent, using o-chloro PNA as material, Pd/C of 5% content as catalyst, metal ion as cocatalyst, replacing air with nitrogen gas at least three times, replacing nitrogen with hydrogen at least three times, filling with hydrogen gas for catalyzed hydrogenation for preparing o-chloro PPD under reaction pressure 0.1-1 Mpa,reaction temperature 60-150 DEG C. The method for preparing o-chloro PPD of the invention has merits of simple production process, good repeatability, largely improved product purity, pollution resistance, which is suitable for industrialized production.

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Номер записи: 2
11-11-2009 дата публикации

Method for preparing diaminonaphthalene by catalytic hydrogenation of dinitronaphthalene

Номер: CN0101575295A
Автор: ZHANG WEI, SUN JIANZHI, LI MINGSHI, LU MOHONG, DAN YUHUA, ZHU JIANJUN, NI HAIPING, CHEN YUZHONG, ZHANG DONGBAO, WEI ZHANG, JIANZHI SUN, MINGSHI LI, MOHONG LU, YUHUA DAN, JIANJUN ZHU, HAIPING NI, YUZHONG CHEN, DONGBAO ZHANG
Принадлежит:

A method for preparing diaminonaphthalene by catalytic hydrogenation of dinitronaphthalene relates to a preparation technology of the diaminonaphthalene, which comprises the following steps: adding a palladium catalyst comprising active components and a carrier and adding the dinitronaphthalene and solvent to a stainless steel high-pressure reactor with an agitator, closing the reactor, replacing air in the reactor with nitrogen for at least three times and then replacing the nitrogen in the reactor with hydrogen for at least three times, and then filling the hydrogen in the reactor so that the reaction pressure in the reactor reaches 0.4-4.0MPa, heating the reactor so that the reaction temperature reaches 30-150 DEG C so as to carry out catalytic hydrogenation to prepare the diaminonaphthalene. The method adopts the hydrogenation reaction technology in the stainless steel high-pressure reactor with the agitator; a catalyst carrier is pretreated to improve the activity of the catalyst and ...

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Номер записи: 3
30-09-2009 дата публикации

Method for preparing 1,5-diaminonaphthalene through catalytic hydrogenation

Номер: CN0101544569A
Автор: NI HAIPING, CHEN YUZHONG, HAIPING NI, YUZHONG CHEN
Принадлежит:

A method for preparing 1,5-diaminonaphthalene through catalytic hydrogenation relates to a technique for preparing 1,5-diaminonaphthalene. In the dissolvent, 1,5-dinitronaphthalene is used as a raw material. Pd/C for the content of 5% is used as a catalyst. Furthermore the metallic ions are added into the reaction system as an additive. After replacing the air with nitrogen for at least three times, the nitrogen is replaced with hydrogen for at least three times. Then hydrogen is filled for executing the catalytic hydrogenation under the following reaction condition: 0.1-1.5MPa of reaction pressure and 80-120DEG C of reaction temperature. Then the 1,5-diaminonaphthalene is prepared. The method for preparing 1,5-diaminonaphthalene through catalytic hydrogenation according to the invention has the advantages of simple preparing method, lower temperature and pressure required for catalyzing the transformation of 1,5-dinitronaphthalene and preparing the 1,5-diaminonaphthalene, and higher reaction ...

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Номер записи: 4
30-09-2009 дата публикации

A green catalyzed method for preparing 3-amino-9-ethyl carbazole

Номер: CN0101544594A
Автор: NI HAIPING, CHEN YUZHONG, HAIPING NI, YUZHONG CHEN
Принадлежит:

A green catalyzed method for preparing 3-amino-9-ethyl carbazole relates to production for 3-amino-9-ethyl carbazole. In the solvent, using 3-nitro-9-ethyl carbazole as material, heating and dissolving, using Ni/meso-porous carbon as catalyst, replacing air with nitrogen gas at least three times, replacing nitrogen with hydrogen at least three times, filling with hydrogen gas for catalyzed hydrogenation for preparing 3-amino-9-ethyl carbazole under reaction pressure 1.5-2.5 Mpa, reaction temperature 80-180 DEG C. The green catalyzed method for preparing 3-amino-9-ethyl carbazole of the invention adopts Ni/meso-porous carbon as catalyst for preparing 3-amino-9-ethyl carbazole from 3-nitro-9-ethyl carbazole, which can reduce waste of all kinds, energy consumption and cost, improve product yield; and product is easily separated.

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Номер записи: 5
30-09-2009 дата публикации

A method for preparing o-chloro PPD

Номер: CN0101544571A
Автор: NI HAIPING, CHEN YUZHONG, HAIPING NI, YUZHONG CHEN
Принадлежит:

The invention relates to a method for preparing o-chloro PPD. In 95% ethanol solvent, using o-chloro PNA as material, Pd/C of 5% content as catalyst, metal ion as cocatalyst, replacing air with nitrogen gas at least three times, replacing nitrogen with hydrogen at least three times, filling with hydrogen gas for catalyzed hydrogenation for preparing o-chloro PPD under reaction pressure 0.1-1 Mpa, reaction temperature 60-150 DEG C. The method for preparing o-chloro PPD of the invention has merits of simple production process, good repeatability, largely improved product purity, pollution resistance, which is suitable for industrialized production.

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Номер записи: 6