Rhodium/nickel alloy nano-catalyst, preparation method and application thereof

A nano-catalyst, nickel alloy technology, applied in the field of nano-catalyst research, can solve the problems of no industrialization value, high cost, retention and other problems

Active Publication Date: 2017-12-08
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, there are some green processes, such as hydrazine hydrate method and electrochemical method, but due to the high cost of these processes, they are still in the laboratory research stage and have not yet reflected the industrial value.

Method used

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  • Rhodium/nickel alloy nano-catalyst, preparation method and application thereof
  • Rhodium/nickel alloy nano-catalyst, preparation method and application thereof
  • Rhodium/nickel alloy nano-catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of catalyst:

[0025] Using rhodium trichloride and nickel acetate as raw materials, hydrazine hydrate as reducing agent, rhodium / nickel alloy nano catalysts are prepared in the presence of organic modifiers.

[0026] When the molar ratio of rhodium to nickel is 0.04:1, the rhodium / nickel alloy catalyst (Rh 0.04 Preparation of Ni): Weigh 0.2106g of RhCl 3 ·3H 2 O, 4.9768g of C 4 H 6 NiO 4 .4H 2 O and 0.5187g of 3-(aminopropyl)triethoxysilane (APTS) were dissolved in 50mL, 90mL, and 20mL of absolute ethanol after ultra-biodispersion, and the resulting RhCl 3 ·3H 2 O and C 4 H 6 NiO 4 .4H 2 The ethanol solution of O was mixed and then mixed with the ethanol solution of 3-(aminopropyl)triethoxysilane (APTS) at 50° C. for 20 min. Adjust the pH to 13 with 0.8mol / L NaOH ethanol solution, add 100mL of 0.75mol / L hydrazine hydrate absolute ethanol solution dropwise to the above reaction solution, react at 70℃ for 6h, the product will be repeated After alcohol washing ...

Embodiment 2

[0030] As in Example 1, only the amount of catalyst was changed to 0.03g, 0.09g, 0.15g, 0.24g, 0.3g, and the 1-nitroanthraquinone selective hydrogenation reaction was carried out. The resulting product selectivity and raw material conversion rate are shown in Table 1.

[0031] Table 1 shows that at 0.8MPa H 2 Under pressure, the reaction temperature is 130°C, and the reaction is kept for 6 hours. When the amount of catalyst is different, the rhodium / nickel alloy nano-catalyst can selectively catalyze the 1-nitroanthraquinone hydrogenation reaction product 1-aminoanthraquinone selectivity and raw material conversion rate According to the data analysis in Table 1, the amount of rhodium / nickel alloy nano-catalyst has an important influence on its catalytic activity for the selective hydrogenation of 1-nitroanthraquinone to prepare 1-aminoanthraquinone. When the amount of rhodium / nickel alloy nanocatalyst is 0.24g, under the experimental conditions, the conversion rate of 1-nitroanth...

Embodiment 3

[0035] The same as in Example 1, only changing the temperature of the reaction kettle to: 100°C, 110°C, 130°C, 150°C, and 160°C, for selective hydrogenation of 1-nitroanthraquinone. The resulting product selectivity and raw material conversion rate are shown in Table 2.

[0036] Table 2 shows that at 0.8MPa H 2 Under pressure, when the amount of catalyst is 0.24g, the rhodium / nickel alloy nano-catalyst can selectively catalyze the selectivity of 1-nitroanthraquinone hydrogenation reaction product 1-aminoanthraquinone and the conversion of raw materials under different reaction temperature and heat preservation for 6 hours. According to the data analysis in Table 2, under the experimental conditions, the reaction temperature has an important influence on the catalytic activity of the rhodium / nickel alloy nano-catalyst to selectively catalyze the hydrogenation of 1-nitroanthraquinone to prepare 1-aminoanthraquinone. When the reaction temperature is 130°C, the conversion rate of 1-n...

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Abstract

The invention relates to a rhodium / nickel alloy nano-catalyst, a preparation method and an application thereof and belongs to the field of nano-catalyst research. The catalyst provided by the invention is a spherical and polyhedral rhodium / nickel alloy nano-particle; the size direction of the prepared rhodium / nickel alloy nano-catalyst particle is 12-58nm; and the molar ratio of rhodium to nickel in the catalyst is at (0.01-0.05):1. According to the invention, nickel acetate and rhodium chloride are taken as raw materials for preparing the rhodium / nickel alloy nano-catalyst with different grain sizes and microstructures, and then 1-nitroanthraquinone and hydrogen are taken as raw materials and the catalyst is adopted for reacting, the reaction temperature is increased to 100-160 DEG C and the heat-insulating reaction is performed for 2-8h, so that high-purity 1-amino anthraquinone can be acquired. The dosage of the catalyst prepared according to the invention is less; the catalyst has higher catalytic activity and stability; and the method for preparing 1-amino anthraquinone by adopting the catalyst is simple in process requirement, is green and environmentally friendly and meets the industrial requirement.

Description

Technical field [0001] The invention relates to a rhodium / nickel alloy nano catalyst, a preparation method and application thereof, and belongs to the research field of nano catalysts. technical background [0002] 1-Aminoanthraquinone is one of the important intermediates of anthraquinone dyes. It has a wide range of uses and a large amount. With the development of the dye industry, the demand for 1-aminoanthraquinone at home and abroad is very large. In China, the industrial production technology of 1-aminoanthraquinone often uses 1-nitroanthraquinone as raw material, and is reduced by sodium sulfide, alkali sulfide, etc., and then oxidized to produce 1-aminoanthraquinone. The products produced by these processes have stable quality, low production cost, simple operation and low technical difficulty, but will produce a large amount of environmental pollutants, and the treatment of the "three wastes" is under great pressure; the sulfonation ammoniation method also has the same ...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J35/08B01J37/16C07C225/34C07C221/00
CPCC07C221/00B01J23/892B01J37/16B01J35/393B01J35/23B01J35/51C07C225/34
Inventor 杨晨晨王爱丽殷恒波
Owner JIANGSU UNIV
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