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Preparation method of alpha-Fe2O3 nano laminated material and method for preparing benzaldehyde from material

A technology of nano-lamination and benzaldehyde, applied in the field of nano-materials, can solve the problems of difficult industrial application and unsatisfactory application effect, and achieve the effect of easy industrialization, good product performance and simple process

Inactive Publication Date: 2017-11-07
QUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Materials with a high specific surface area structure can provide more reactive sites to further improve the catalytic activity of the material, so researchers have synthesized α-Fe with various structures 2 o 3 Nanomaterials, such as single crystal nanorings, nanorods, multilevel nanopropellers, dendritic structures, nanohollow spheres, etc., only two of them have high specific surface area: multilevel structure and hollow structure, but due to reactivity The site is covered, and the application effect in the field of styrene catalytic oxidation of benzaldehyde is not ideal, and it is still difficult for industrial application

Method used

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  • Preparation method of alpha-Fe2O3 nano laminated material and method for preparing benzaldehyde from material
  • Preparation method of alpha-Fe2O3 nano laminated material and method for preparing benzaldehyde from material
  • Preparation method of alpha-Fe2O3 nano laminated material and method for preparing benzaldehyde from material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Pre-mixing step: sequentially add 2 g of FeCl to 250 g of ethanol3 ·6H 2 O, 1.5 grams of deionized water and 1.5 grams of sodium acetate, stirred at 150 rpm for 45 minutes, reacted for 2 hours in a constant temperature water bath at 60° C., stopped stirring, and obtained a mixed solution.

[0040] Concentration step: Concentrate the mixed solution obtained in the pre-mixing step at 90° C. for 12 hours to obtain a concentrated solution.

[0041] Hydrothermal synthesis step: take 100 grams of the concentrated solution obtained in the concentration step and add it to a polytetrafluoroethylene-lined reactor, add 6 grams of deionized water and 8 grams of sodium acetate, stir at 150 rpm for 45 minutes, seal the kettle, and then React at 180°C for 8 hours, cool to room temperature after the reaction, centrifuge and filter, collect the solid product, wash with absolute ethanol and distilled water, and obtain α-Fe after drying 2 o 3 Nanolaminated materials.

Embodiment 2

[0043] Pre-mixing step: sequentially add 3 grams of FeCl to 250 grams of ethanol 3 ·6H 2 O, 1.5 grams of deionized water and 2 grams of sodium acetate, stirred at 200 rpm for 60 minutes, reacted in a constant temperature water bath at 70° C. for 1 hour, stopped stirring, and obtained a mixed solution.

[0044] Concentration step: the mixed liquid obtained in the pre-mixing step was concentrated at 95° C. for 6 hours to obtain a concentrated liquid.

[0045] Hydrothermal synthesis step: take 100 grams of the concentrated solution obtained in the concentration step and add it to a polytetrafluoroethylene-lined reactor, add 8 grams of deionized water and 10 grams of sodium acetate, stir at a rate of 200 rpm for 60 minutes, seal the kettle, and then React at 160°C for 12 hours, cool to room temperature after the reaction, centrifuge and filter, collect the solid product, wash with absolute ethanol and distilled water, and obtain α-Fe after drying 2 o 3 Nanolaminated materials. ...

Embodiment 3

[0047] Pre-mixing step: sequentially add 1 g of FeCl to 250 g of ethanol 3 ·6H 2 O, 1.5 grams of deionized water and 1 gram of sodium acetate, stirred at 100 rpm for 30 minutes, reacted in a constant temperature water bath at 45°C for 3 hours, stopped stirring, and obtained a mixed solution.

[0048] Concentration step: the mixed liquid obtained in the pre-mixing step was concentrated at 75° C. for 72 hours to obtain a concentrated liquid.

[0049] Hydrothermal synthesis step: take 100 grams of the concentrated solution obtained in the concentration step and add it to a polytetrafluoroethylene-lined reactor, add 5 grams of deionized water and 6 grams of sodium acetate, stir at a rate of 100 rpm for 30 minutes, seal the kettle, and then React at 200°C for 6 hours, cool to room temperature after the reaction, centrifuge and filter, collect the solid product, wash with absolute ethanol and distilled water, and obtain α-Fe after drying 2 o 3 Nanolaminated materials.

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Abstract

The invention discloses a preparation method of an alpha-Fe2O3 nano laminated material. The preparation method comprises the steps as follows: (a) premixing; (b) concentration; (c) hydrothermal synthesis. The invention further discloses a method for preparing benzaldehyde from the material. The preparation method of the alpha-Fe2O3 nano laminated material has the advantages of simple process, low cost and environment friendliness, the obtained alpha-Fe2O3 nano laminated material catalyzes styrene oxide for preparation of the benzaldehyde, and the method has the advantages of high conversion rate and good selectivity.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to an α-Fe 2 o 3 The preparation method of the nano laminated material and the method of using the material to prepare benzaldehyde. Background technique [0002] The production process of benzaldehyde mainly includes five kinds of toluene chlorination hydrolysis method, benzyl alcohol oxidation method, toluene direct oxidation method, indirect electrosynthesis oxidation method, and benzoic acid hydrogenation reduction method. At present, most of the benzaldehyde produced in my country is produced by the hydrolysis process of benzyl dichloride, which restricts the large-scale application of benzaldehyde in the perfume and pharmaceutical industries because of the chloride contained in the product, and the production process is complicated and the production process environment Poor friendliness, high equipment requirements, low conversion rate and selectivity, many by-products...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82Y40/00B01J23/745C07C47/54C07C45/28
CPCB82Y40/00C01G49/06C07C45/28B01J23/745C01P2004/03B01J35/23C07C47/54
Inventor 刘佳雷宏胡静沈喜爱魏凯佳
Owner QUZHOU UNIV
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