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Co-M-B amorphous alloy nanotube catalyst, and preparation and application thereof

A technology of amorphous alloys and nanotubes, which is applied in the direction of metal/metal oxide/metal hydroxide catalysts, preparation of hydroxyl compounds, and preparation of organic compounds. Problems such as high particle ratio, to achieve the effect of easy operation and control, improved productivity and excellent performance

Active Publication Date: 2013-09-04
HUNAN FIRST NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims at the existence of low yield and high proportion of nano particles in the catalyst of amorphous alloy nanotubes prepared by liquid crystal template method in the prior art; when the prepared catalyst is in use, the tubular structure of the catalyst is easily destroyed, and the catalyst The problem of poor stability provides a Co-Mo(W)-B amorphous alloy nanotube catalyst and its preparation and application

Method used

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  • Co-M-B amorphous alloy nanotube catalyst, and preparation and application thereof
  • Co-M-B amorphous alloy nanotube catalyst, and preparation and application thereof
  • Co-M-B amorphous alloy nanotube catalyst, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] a) Weigh 0.58g of camphorsulfonic acid, dissolve it in 10mL of deionized water, add 7mL of Tween 60, stir evenly in an oil bath at 55°C to form a transparent solution, and then add 0.44g of molybdic acid to the solution Ammonium and 0.60g cobalt chloride hexahydrate, stirred into a transparent solution, placed in an oil bath at 55°C for 10 minutes;

[0069] b) The above solution is gradually cooled to 25°C to form a liquid crystal precursor, which is transferred to a 250mL three-necked flask to prepare three parts of the liquid crystal precursor, adding 5mL, 10mL and 15mL of acetone solution respectively, and stirring for 10 minute;

[0070] c) Freshly configure 9ml of a mixed aqueous solution of 0.1M sodium hydroxide and 4M sodium borohydride, place the beaker containing the above solution in an ice-water mixing bath, and add it to step b) with a constant flow pump at a flow rate of 0.05mL / min The resulting solution was protected with nitrogen, and the reaction was co...

Embodiment 2

[0075] a) Weigh 0.58g of camphorsulfonic acid, dissolve it in 10mL of deionized water, add 7mL of Tween 60, stir evenly in an oil bath at 55°C to form a transparent solution, and then add 0.62g of partial tungsten to this solution ammonium chloride and 0.60g cobalt chloride hexahydrate, stirred into a transparent solution, placed in an oil bath at 55°C for 10 minutes;

[0076] b) Gradually cool the above solution to 25° C. to form a liquid crystal precursor, transfer the liquid crystal precursor to a 250 mL three-necked flask, add 10 mL of acetone solution, and stir for 10 minutes;

[0077] c) Freshly configure 9ml of a mixed aqueous solution of 0.1M sodium hydroxide and 4M sodium borohydride, place the beaker containing the above solution in an ice-water mixing bath, and add it to step b) with a constant flow pump at a flow rate of 0.05mL / min The resulting solution was protected by argon, and the reaction was complete under magnetic stirring. At room temperature, the above mi...

Embodiment 3

[0081] The difference between this example and Example 1 is that: step b) is to add 10 mL of isopropanol solution.

[0082] All the other contents are the same as those described in Example 1.

[0083] The specific surface area of ​​Co-Mo-B amorphous alloy nanotubes prepared in this example is 117.8m 2 / g, the outer diameter of the nanotube is 65-70nm, the inner diameter is 60-65nm, the thickness of the tube wall is about 3-5nm, and its composition is: Co 68.82 Mo 13.04 B 18.14 (molar ratio); the yield is 92%-95%.

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Abstract

The invention discloses a Co-M-B amorphous alloy nanotube catalyst, and a preparation and an application thereof. The Co-M-B amorphous alloy nanotube catalyst comprises the following components of Co, M and B, the molar ratio of Co to M to B is 68-70 to 12-14 to 18-19, M is selected from Mo or W, and the diameter, the pipe wall thickness and the specific surface area of the Co-M-B amorphous alloy nanotube catalyst is 60-70 nm, 3-5 nm and 110-120 m<2>/g respectively. The catalyst is prepared through the combination of a chemical reduction method in such a way that polysorbate, camphorsulfonic acid, soluble cobalt salt, M containing soluble salt (ammonium molybdate or ammonium metatungstate) and water are self-assembled into a liquid crystal precursor, and the liquid crystal precursor is diluted by acetone and the like to increase the fluidity. The Co-M-B amorphous alloy nanotube catalyst, the preparation and the application increase the yield of a nanotube, and reduce the proportion of the granular product; the specific surface area of the catalyst is 3-4 times of that of a amorphous alloy nano-particle catalyst; and the catalyst prepared is high in activity, good in stability, simple in process, easy to control in condition, low in cost, convenient for industrial production.

Description

technical field [0001] The invention relates to a Co-M-B amorphous alloy nanotube catalyst and its preparation and application, belonging to the technical field of industrial catalysis. Background technique [0002] The selective hydrogenation of α-β-unsaturated aldehydes is an important class of reactions in industry. α-β unsaturated aldehydes are important chemical raw materials and intermediates. Among its hydrogenation products, unsaturated alcohols obtained by selective hydrogenation of C=O bonds are raw materials and intermediates for medicines, spices, etc. body. The current research results show that this type of reaction uses an amorphous alloy (such as: Co-B) as a catalyst. Compared with other catalysts (such as: noble metals Au, Pt, Rf, etc.), it has the advantages of low price, mild reaction conditions, good product and solvent The advantages of easy separation and simple post-processing of the product meet the requirements of modern chemical industry. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888B01J23/882C07C33/32C07C29/141
Inventor 莫敏
Owner HUNAN FIRST NORMAL UNIV
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