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Nano-precious metal catalyst and preparation method thereof

A noble metal catalyst and noble metal technology, applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, catalyst protection, etc., can solve the problems of low-temperature hydrogenation activity, complex preparation process, and difficult application , to achieve good low-temperature hydrogenation activity

Active Publication Date: 2013-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of low-temperature hydrogenation activity of nano-metal catalysts in the prior art, complicated preparation process and difficult application, and to provide a nano-noble metal catalyst, which uses a special polymer stabilizer, which can Good low-temperature hydrogenation activity is obtained, and the preparation method of the catalyst is simple and the application is convenient

Method used

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  • Nano-precious metal catalyst and preparation method thereof
  • Nano-precious metal catalyst and preparation method thereof
  • Nano-precious metal catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 30g of polyvinyl alcohol, add 270g of deionized water, let it stand for 1 hour, and heat and dissolve in a water bath at 90°C for 3 hours to obtain a transparent solution. Add 40ml ruthenium trichloride aqueous solution to above-mentioned PVA solution, its concentration is 7mg Ru / ml H 2 O, stir evenly, add 30ml of 0.03g / ml NaOH aqueous solution dropwise under stirring, and keep the temperature at 95°C for 2 hours to obtain a black solution. The solution was dropped onto a copper grid to dry, and the transmission electron microscope photos were as follows: figure 1 , figure 2 shown.

Embodiment 2

[0027] Weigh 30g of polyvinyl alcohol, add 270g of deionized water, let it stand for 1 hour, place it in an ordinary household microwave oven and heat it on high heat for 5 minutes to obtain a transparent solution. Add 40ml ruthenium trichloride aqueous solution to above-mentioned PVA solution, its concentration is 7mg Ru / ml H 2 O, stir evenly, add 30ml of 0.03g / ml NaOH aqueous solution dropwise under stirring, and keep the temperature at 95°C for 2 hours to obtain a black solution.

Embodiment 3

[0029] Weigh 20g of polyvinyl alcohol, add 180g of deionized water, let it stand for 1 hour, place it in a common household microwave oven and heat it on high heat for 5 minutes to obtain a transparent solution. In above-mentioned PVA solution, add 40ml ruthenium trichloride aqueous solution, its concentration is 4mg Ru / ml H 2 O, stir evenly, add dropwise 15ml 0.03g / ml NaOH aqueous solution under stirring, place in microwave oven and react for 10 minutes to obtain black solution. The solution was dropped onto a copper grid to dry, and the transmission electron microscope photos were as follows: image 3 shown.

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Abstract

The invention discloses a nano-precious metal catalyst, which comprises precious metal nanoparticles and polyvinyl alcohol, wherein the precious metal nanometer particles are dispersed in a polyvinyl alcohol aqueous solution; and the precious metal is at least one of ruthenium, palladium, platinum and rhodium. In the catalyst, a polyvinyl alcohol aqueous solution system is adopted, other high-polymer stabilizers or sulfur-containing protective agents or reducing agents are not introduced, and the reducing performance of polyvinyl alcohol or the reducing performance of a disintegrated materialin the preparing process of polyvinyl alcohol are utilized. The catalyst has high low-temperature hydrogenation activity, and a simple preparation method, and is convenient to apply.

Description

technical field [0001] The invention relates to a nanometer noble metal catalyst and a preparation method thereof, more specifically to a nanometer noble metal hydrogenation catalyst and a preparation method thereof. Background technique [0002] Nanoscale noble metal catalysts exhibit unique performance in catalytic reactions due to their huge specific surface area, and their preparation and application have been widely reported. [0003] The preparation of nano-noble metal catalysts is usually in the presence of polymer stabilizers, such as polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), poly-N-isopropylacrylamide, etc., using alcohols, NaBH4, etc. to reduce agent, reducing the noble metal salts in the solution to obtain noble metal nanoparticles dispersed in the solvent. In order to obtain stable nano-metal particles, it is often necessary to add long-chain amine or water-soluble phosphine. For example, Chinese patent CN1058919 discloses a preparation method of n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/46B01J23/44B01J23/42B01J37/16B01J33/00C01B3/54C10G2/00C07C1/04C07C5/10
Inventor 鲁树亮王秀玲王红亚王翀徐洋戴伟
Owner CHINA PETROLEUM & CHEM CORP
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