Composite metal oxide loading active metal catalyst and preparation method thereof

A technology of active metals and composite metals, applied in the direction of metal/metal oxide/metal hydroxide catalysts, carbon compound catalysts, physical/chemical process catalysts, etc., to achieve the effect of simple process, high dispersion and uniform dispersion

Active Publication Date: 2017-05-31
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst is mainly used in the hydrogenation reaction process of alkyne

Method used

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  • Composite metal oxide loading active metal catalyst and preparation method thereof
  • Composite metal oxide loading active metal catalyst and preparation method thereof
  • Composite metal oxide loading active metal catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A. Add 3.8460g Mg(NO 3 ) 2 ·6H 2 O and 3.6000g Ti(SO 4 ) 2 Dissolve in 70mL of deionized water to prepare a mixed metal salt solution.

[0038] B. Dissolve 6.1950g of urea into the mixed metal salt solution prepared in step A, and transfer the uniformly dissolved solution to a 100mL reactor, and react in an oven at 150°C for 6h. After the reaction was completed, it was lowered to room temperature, and the obtained product was centrifuged, washed to neutrality, dried, and heated at 10°C·min in an air atmosphere. -1 The rate is raised to 450°C for calcination and kept for 4h to obtain Mg with a microsphere structure 5 Ti 5 o x The carrier has an average diameter of 1.8 μm.

[0039] C. Weigh 0.6440g PdCl 2 and 0.4250g NaCl were dissolved in deionized water and adjusted to 100mL to prepare Na 2 PdCl 4 solution; weigh 0.8495g AgNO 3 Dissolve in deionized water and dilute to 100mL to prepare AgNO 3 solution.

[0040] D. Add 560μL 36.3mmol / L Na 2 PdCl 4 solutio...

Embodiment 2

[0045]A. Add 2.5640g Mg(NO 3 ) 2 ·6H 2 O and 1.8757g Al(NO 3 ) 3 9H 2 O was dissolved in 170 mL of deionized water to prepare a mixed metal salt solution.

[0046] B. Dissolve 10g of urea into the mixed metal salt solution prepared in step A, and transfer the uniformly dissolved solution to a 250mL reactor, and react in an oven at 90°C for 24h. After the reaction was completed, it was lowered to room temperature, and the obtained product was centrifuged and washed to neutrality, then the precipitate obtained in the lower layer was dried, and the obtained precursor was heated in an air atmosphere at 5°C·min -1 The rate is raised to 600 ° C for 2 hours, and the Mg with microspheres is obtained. 2 al 1 o x The carrier has an average diameter of 1.0 μm.

[0047] C. Weigh 1g PtCl 2 Dissolve in deionized water and dilute to 100mL to prepare H 2 PtCl 4 solution.

[0048] D. Add 600μL 20mmol / L H 2 PtCl 4 The solution was added to 150 μL of deionized water, and 0.2 g of ...

Embodiment 3

[0051] A. Add 1.4505g Ni(NO 3 ) 2 ·6H 2 O, 0.9378g Cu(NO 3 ) 2 ·3H 2 O and 1.8757g Al(NO 3 ) 3 9H 2 O was dissolved in 70 mL of deionized water to prepare a mixed metal salt solution.

[0052] B. Dilute 7.1556g Na 2 CO 3 Dissolve in the mixed metal salt solution prepared in step A, and transfer the uniformly dissolved solution to a 100mL reactor, and react in an oven at 60°C for 48h. After the reaction was completed, it was lowered to room temperature, and the obtained product was centrifuged and washed to neutrality, then the precipitate obtained in the lower layer was dried, and the obtained precursor was heated in an air atmosphere at 10°C·min -1 The rate is raised to 600 ° C for 4 hours to obtain NiCuAlO with microspheres x The carrier has an average diameter of 1.2 μm.

[0053] C. Weigh 0.35g RhCl 3 ·3H 2 O was dissolved in deionized water and adjusted to 100 mL to prepare a Rh precursor solution.

[0054] D. Add 1.0ml 25mmol / L RhCl 3 The solution was adde...

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Abstract

The invention provides a composite metal oxide loading active metal catalyst and a preparation method thereof. The catalyst is formed by loading an active metal component by a composite metal oxide serving as a carrier. The catalyst has the characteristics that the active metal component is highly and stably dispersed on the surface of the carrier, the crystal shape is complete, the size is uniform, the particle size is 1 to 5 nm, and the particle size distribution range is small. The preparation method provided by the invention comprises the following steps: dissolving two or three soluble metal salts in deionized water to prepare a mixed salt solution, mixing the mixed salt solution with an alkaline precipitator, and carrying out crystallizing, washing, drying and roasting to obtain a composite metal oxide carrier which is of a uniform microspherical structure and has an average diameter of 0.3 to 3.0 [mu]m; steeping the carrier in steeping liquid to enable the carrier to be coated with the metal salts, and carrying out drying, roasting and reduction to obtain the catalyst. The catalyst can be applied to various alkyne hydrogenation reaction processes in the fields of petrochemical engineering, fine chemical engineering and the like, and is outstanding in catalysis property and easy to recycle and reuse.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a highly dispersed and supported metal catalyst prepared by a modified impregnation method with a microspherical composite metal oxide as a carrier. The catalyst is mainly used in various fields of petrochemical and fine chemical During the hydrogenation reaction of alkynes. Background technique [0002] Olefin compounds are one of the important raw materials for the production of important fine chemicals and petrochemical industries. They are widely used in pharmaceutical intermediates, dyes and industrial additives, etc., and have an important impact on the national economy. The current industrial method for large-scale preparation of olefins is the pyrolysis method. During the cracking process, the generated cracked gas usually contains a small amount of alkynes. A small amount of alkyne is a harmful substance in the olefin polymerization reaction, which will poison the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/50B01J23/42B01J23/89B01J23/66C07C5/09C07C11/04
CPCY02P20/52B01J23/58B01J23/66B01J23/8926B01J23/894B01J23/896B01J35/023B01J35/08C07C5/09C07C2523/42C07C2523/50C07C2523/66C07C2523/89C07C11/04
Inventor 李殿卿刘雅楠冯俊婷贺宇飞
Owner BEIJING UNIV OF CHEM TECH
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