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A kind of magnetic au/fe3o4 catalyst and its preparation method and application

A catalyst and magnetic technology, applied in the direction of physical/chemical process catalyst, amino compound preparation, carbon-based compound preparation, etc., can solve the problems of producing a large amount of iron sludge, industrial waste water, polluting the environment, etc., and achieve high selectivity and production process Simple, low-cost preparation effects

Active Publication Date: 2018-10-16
MINNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current commercial production of aromatic amines uses metered reducing agents, such as sodium dithionate, sodium borohydride, hydrazine hydrate, and iron, tin, and zinc in ammonia, and the process generally involves high temperatures. , high pressure and catalyst iron powder, the process has many problems such as industrial waste water and a large amount of iron sludge, which not only consumes high energy but also seriously pollutes the environment

Method used

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  • A kind of magnetic au/fe3o4 catalyst and its preparation method and application
  • A kind of magnetic au/fe3o4 catalyst and its preparation method and application
  • A kind of magnetic au/fe3o4 catalyst and its preparation method and application

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preparation example Construction

[0026] A magnetic Au / Fe 3 o 4 The preparation method of catalyst comprises the following steps:

[0027] 1) 2.70 g ferric chloride (FeCl 3 ) and 1.96 g ferrous ammonium sulfate hexahydrate ((NH 4 ) 2 Fe(SO 4 ) 2 ·6H 2 O) Dissolve in 100mL deionized water together, and heat to 65°C under stirring;

[0028] 2) Keep the temperature of the solution obtained in step 1) at 65°C, then slowly add ammonia solution (1:1, v / v) dropwise while stirring, adjust the pH value of the reaction solution to 10-11, and then continue to stir at 65°C for reaction 1 h;

[0029] 3) After the obtained solid is separated by filtration, it is washed with deionized water until the pH is neutral, and dried to obtain Fe 3 o 4 solid;

[0030] 4) The resulting 0.19 g Fe 3 o 4 The solid is placed in a container, and the equal-volume impregnation method is used to slowly dissolve the Fe 3 o 4 Evenly drop 0.5-1 mL of chloroauric acid solution with a concentration of 0.5-1mol / L on the solid surface...

Embodiment

[0042] 1) 2.70 g ferric chloride (FeCl 3 ), 1.96 g ferrous ammonium sulfate hexahydrate ((NH 4 ) 2 Fe(SO 4 ) 2 ·6H 2 O) were dissolved together in 100 mL deionized water, and heated to 65°C under stirring; then slowly added ammonia solution (1:1, v / v) dropwise while stirring to adjust the pH value of the reaction solution to 10-11, and then Continue to stir and react at 65°C for 1 h; the resulting solid is separated by filtration, washed with deionized water until the pH is neutral, and dried to obtain Fe 3 o 4 solid;

[0043] 2) The prepared 0.19 g Fe 3 o 4 The solid is placed in a container, and the equal-volume impregnation method is used to slowly dissolve the Fe 3 o 4 Evenly drop 1 mL of HAuCl with a concentration of 0.5 mol / L on the solid surface 4 solution; then impregnated with HAuCl 4 Fe 3 o 4 Completely dry, then calcined at 400°C for 2 h to obtain Au / Fe 3 o 4 Composite material, the loading amount of noble metal Au in the obtained composite material ...

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Abstract

The invention discloses a magnetic Au / Fe3O4 catalyst, a preparation method and application thereof. The magnetic Au / Fe3O4 catalyst is prepared by taking an iron salt, ferrous salt, ammonia water and chloroauric acid as the raw material, and carrying out precipitation, impregnation and calcinations. The preparation method provided by the invention has the advantages of low cost and simple production process, and can realize large-scale production. The obtained catalyst has high catalytic activity and selectivity, can be used for catalytic oxidation of benzyl alcohol and catalytic reduction of aromatic nitro compounds, and is conducive to the sustainable development of environment and energy sources.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, in particular to a magnetic Au / Fe 3 o 4 Catalyst and its preparation method and its application in catalytic oxidation of benzyl alcohol and catalytic reduction of aromatic nitro compounds. Background technique [0002] Magnetic materials, that is, strong magnetic substances, are ancient and widely used functional materials. They have been recognized and applied by people as early as 3000 years ago, such as using natural magnets as compass. Making magnetic materials into various components has the functions of converting, transmitting, processing information, storing energy, saving energy, etc., and is widely used in energy, telecommunications, automatic control, communications, household appliances, biology, medical and health care, light industry, and mineral processing , physical prospecting, military industry and other fields, especially in the field of information technology h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89C07C209/36C07C211/51C07C211/52C07C211/47C07C45/38C07C47/54C07C215/76C07C217/48
CPCB01J23/8906B01J35/0033B01J35/026C07C45/38C07C209/325C07C213/02C07C47/54C07C211/51C07C211/52C07C211/47C07C215/76C07C217/48
Inventor 张燕辉胡世荣李国平
Owner MINNAN NORMAL UNIV