Aluminum modified Fe3O4 magnetic material and preparing method and application thereof

A magnetic material and aluminum modification technology, which is applied in the field of aluminum modified Fe3O4 magnetic catalyst and its preparation, can solve the problems of poor reusability and low catalyst activity, and achieve good reusability, high catalytic activity and easy magnetic separation and the effect of recycling

Inactive Publication Date: 2016-09-07
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at common Fe 3 o 4 Catalyst activity is low, while organic group modified Fe 3 o 4 In order to solve the problems of poor repeated use performance, a new type of aluminum-modified Fe 3 o 4 Magnetic catalyst and its preparation and method, the catalyst uses aluminum-containing compound to modify Fe 3 o 4 , not only can significantly increase the Fe 3 o 4 Catalytic performance for the selective oxidation of benzyl alcohol, which is more stable than organic modifiers during use, and the recovered catalyst does not need to be re-modified before reuse, which simplifies the regeneration steps of the catalyst and improves the reusability of the catalyst

Method used

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  • Aluminum modified Fe3O4 magnetic material and preparing method and application thereof
  • Aluminum modified Fe3O4 magnetic material and preparing method and application thereof
  • Aluminum modified Fe3O4 magnetic material and preparing method and application thereof

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Embodiment 1

[0035] A kind of aluminum modified Fe 3 o 4 Magnetic material, its preparation method comprises the following steps:

[0036] Add 3.601g NaOAc to the solution containing 3.703g FeCl 3 ·6H 2O in ethylene glycol (the volume of ethylene glycol is 9mL) solution, stir evenly to obtain a mixed solution; then 2mL aluminum isopropoxide solution (a saturated isopropanol solution of aluminum isopropoxide, wherein The content is 0.133g) into the mixed solution, stirred evenly to obtain the reaction solution; the reaction solution was heated to 198°C for 24 hours at a constant temperature, annealed and cooled, and the obtained solid particles were collected by magnetic separation, and finally washed and dried to obtain the aluminum alloy Sex Fe 3 o 4 Magnetic material (denoted as Fe 3 o 4 -AIP-1).

[0037] The X-ray diffraction analysis result of the product obtained in this embodiment is shown in figure 1 , the characteristic peaks in the figure are related to Fe 3 o 4 It is c...

Embodiment 2

[0042] A kind of aluminum modified Fe 3 o 4 Magnetic material, its preparation method comprises the following steps:

[0043] Add 3.601g NaOAc to the solution containing 3.703g FeCl 3 ·6H 2 O in ethylene glycol (9mL) solution, stirred evenly to obtain a mixed solution; then 0.5ml of aluminum isopropoxide solution (saturated isopropoxide solution of aluminum isopropoxide, wherein the content of aluminum isopropoxide is 0.033 g) adding to the mixed solution, stirring evenly to obtain a reaction solution; the reaction solution was heated to 198°C for 36 hours of constant temperature reaction, annealed and cooled, and the obtained solid particles were collected by magnetic separation, and finally washed and dried to obtain the aluminum-modified Fe 3 o 4 Magnetic material (denoted as Fe 3 o 4 - AIP-2, the average aluminum content measured by EDX is 0.42 wt%).

Embodiment 3

[0045] A kind of aluminum modified Fe 3 o 4 Magnetic material, its preparation method comprises the following steps:

[0046] Add 1.800g NaOAc to the solution containing 1.852g FeCl 3 ·6H 2 O in ethylene glycol (4.5mL) solution, stirred evenly to obtain a mixed solution; then 4ml of aluminum isopropoxide solution (saturated isopropoxide solution of aluminum isopropoxide, wherein the content of aluminum isopropoxide is 0.266 g) adding to the mixed solution, stirring evenly, to obtain a reaction solution; the reaction solution was heated to 198°C for 24 hours at a constant temperature, annealed and cooled, and the obtained solid particles were collected by magnetic separation, and finally washed and dried to obtain the aluminum-modified Fe 3 o 4 Magnetic material (denoted as Fe 3 o 4 - AIP-3, the average content of aluminum measured by EDX is 3.15 wt%).

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Abstract

The invention discloses an aluminum modified Fe3O4 magnetic material and a preparing method and application thereof and belongs to the fields of preparation and organic catalysis of magnetic catalysts. The aluminum modified Fe3O4 magnetic material is obtained through in situ synthesis by means of the solvothermal method, and is used as a catalyst to catalyze H2O2 in a water phase and oxidize benzyl alcohol selectively so as to prepare benzaldehyde. The raw materials of the prepared catalyst are cheap and easy to obtain, and operation is easy and convenient. A catalytic reaction system for synthesizing benzaldehyde is environmentally friendly, the yield of benzaldehyde is high (43.7%), and magnetic separation recovery and regeneration cyclic use of the catalyst are easy to achieve; furthermore, no byproduct containing chlorine exists in benzaldehyde, so that application in the fields such as spice and medicine is possible, and application prospects are broad.

Description

technical field [0001] The invention belongs to the field of preparation of magnetic catalysts and organic catalysis, in particular to an aluminum modified Fe 3 o 4 Magnetic catalyst and its preparation method and application. Background technique [0002] Benzaldehyde is an important fine chemical intermediate, which is widely used in chemical industry, fragrance and medicine industries, among which the demand of medicine, fragrance and other industries accounts for 80% of the total demand. At present, the method for industrial synthesis of benzaldehyde is mainly toluene chlorination and hydrolysis, but the benzaldehyde produced by this method contains chlorine, which limits the application in perfumery and medicine. Therefore, it is urgent to develop a new process for the production of chlorine-free benzaldehyde. [0003] Selective oxidation of benzyl alcohol produces benzaldehyde. From benzyl alcohol-H 2 o 2 -Fe 3 o 4 -H 2 The liquid-phase catalytic system compose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C07C45/29C07C47/54
CPCB01J23/745B01J35/0033C07C45/294C07C47/54
Inventor 陈逢喜熊雷沙
Owner WUHAN INSTITUTE OF TECHNOLOGY
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