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Method for preparing load type ternary metal oxide catalyst

A ternary metal and oxide technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, heterogeneous catalyst chemical elements, etc., can solve the problem of low catalyst activity

Inactive Publication Date: 2016-10-26
CHANGZHOU UNIV
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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 provide a method for preparing a supported ternary metal oxide catalyst in order to overcome the shortcomings of existing catalysts such as low activity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] NiCl 2 and AlCl 3 Dissolve them in water respectively, make a solution with a concentration of 2mol / L, mix the two solutions, keep the molar ratio of Ni and Al at 4, drop a certain amount of NaOH in a water bath with a constant temperature of 80°C, and keep the pH value at 13, React for 3 hours and age for 24 hours. During this process, a precipitate with a layered structure is formed. The precipitate is separated, washed 3 times with deionized water, and dried; The precipitate passed through a 50-mesh sieve was added to a sodium dodecylsulfonate solution with a mass percent concentration of 1%, stirred in a constant temperature water bath at 70°C for 6 hours, aged for 24 hours, centrifuged, and the supernatant was removed to obtain dodecane Precipitate modified by sodium sulfonate; (3-aminopropyl) triethoxysilane, salicylaldehyde and lanthanum nitrate are added to 40mL water to form a solution in the amount of 1:1:1 (molar ratio) each 4mol , reacted at 35°C for 8h, a...

Embodiment 2

[0021] NiCl 2 and AlCl 3 Dissolve them in water respectively, and make a solution with a concentration of 1mol / L. Mix the two solutions, keep the molar ratio of Ni and Al at 2, drop a certain amount of NaOH in a water bath with a constant temperature of 70°C, and keep the pH at 12. React for 2 hours and age for 12 hours. During this process, a precipitate with a layered structure is formed. The precipitate is separated, washed twice with deionized water, and dried; The precipitate passed through a 20-mesh sieve was added to a sodium dodecylsulfonate solution with a mass percentage concentration of 0.1%, stirred in a constant temperature water bath at 60°C for 5 hours, aged for 12 hours, centrifuged, and the supernatant was removed to obtain dodecane Precipitate modified by sodium sulfonate; (3-aminopropyl) triethoxysilane, salicylaldehyde and lanthanum nitrate are added to 20mL of water to form a solution in the amount of 1:1:1 (molar ratio) each 2mol , reacted at 20°C for 6...

Embodiment 3

[0024] NiCl 2 and AlCl 3Dissolve them in water respectively, make a solution with a concentration of 2 mol / L, mix the two solutions, keep the molar ratio of Ni and Al at 3, drop a certain amount of NaOH in a water bath with a constant temperature of 80°C, and keep the pH value at 13, React for 2 hours and age for 18 hours. During this process, a precipitate with a layered structure is formed. The precipitate is separated, washed 3 times with deionized water, and dried; The precipitate passed through a 50-mesh sieve was added to a sodium dodecylsulfonate solution with a mass percent concentration of 0.5%, stirred in a constant temperature water bath at 70°C for 6 hours, aged for 24 hours, centrifuged, and the supernatant was removed to obtain dodecane Precipitate modified by sodium sulfonate; (3-aminopropyl) triethoxysilane, salicylaldehyde and lanthanum nitrate were added to 40mL water to form a solution by 3 mol each in the amount of 1:1:1 (molar ratio) , reacted at 35°C fo...

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PUM

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Abstract

The invention discloses a method for preparing a load type ternary metal oxide catalyst. The method sequentially comprises the following steps of mixing NiCl2 and AlCl3 solution, adding NaOH dropwise in constant temperature bath, and forming sediment having a laminated structure; adding the sediment into sodium dodecyl sulfate solution, and obtaining sodium dodecyl sulfate-modified sediment; adding 3-aminopropyltriethoxysilane, salicylaldehyde and lanthanum nitrate according to a ratio of 1:1:1 (mole ratio) into water to form solution, adding the sodium dodecyl sulfate-modified sediment, inserting lanthanum-containing organic complexes generated by reaction into a sodium dodecyl sulfate-modified sediment layer under a distribution effect, and forming sediment pillared by the lanthanum-containing organic complexes; placing a product in a muffle to perform burning for 6-8 h, and obtaining the lanthanum nickel aluminum ternary metal oxide catalyst. Various catalysts in a material are compounded with each other to be evenly distributed in the pore wall of the three-dimensional channel and have a good adsorption and catalysis effect on reactants.

Description

technical field [0001] The invention relates to a preparation method of a supported ternary metal oxide catalyst, which belongs to the field of preparation of catalytic materials. Background technique [0002] At present, catalysts widely developed and used in automobile exhaust purification abroad are basically composed of precious metals such as platinum and rhodium. Although the catalyst has the advantages of high activity, good purification effect, and long life, the cost is relatively high, especially platinum and rhodium are limited by resources. In order to alleviate the contradiction between the supply and demand of platinum, especially rhodium, palladium, which is relatively cheap, is widely used, and a catalyst composed of platinum, rhodium, and palladium and a palladium catalyst have been developed. [0003] It is found that the catalyst made by replacing some precious metals with rare earths is low in cost and can obtain satisfactory purification effect. The ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83
CPCB01J23/83B01J23/002B01J2523/00B01J2523/41B01J2523/847B01J2523/31B01J2523/3706
Inventor 黄文艳赵文昌
Owner CHANGZHOU UNIV