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A kind of ordered mesoporous titanium-aluminum composite oxide and its preparation method and application

An aluminum composite and oxide technology, applied in chemical instruments and methods, catalyst activation/preparation, organic chemistry, etc., can solve the problems of low catalytic activity and stability, large titanium oxide grain size, etc., and achieve uniform mesopore pore size Adjustable, large pore volume, large specific surface area effect

Active Publication Date: 2021-02-02
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when titania or supported titania materials are prepared by traditional methods, the obtained materials often have large titania grain size, which leads to their incorporation in CO 2 Shows lower catalytic activity and stability in the dehydrogenation reaction of ethylbenzene oxide

Method used

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  • A kind of ordered mesoporous titanium-aluminum composite oxide and its preparation method and application
  • A kind of ordered mesoporous titanium-aluminum composite oxide and its preparation method and application
  • A kind of ordered mesoporous titanium-aluminum composite oxide and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Under strong stirring at 38°C, 0.8g deionized water, 0.46g citric acid, 3.2g EO 106 PO 70 EO 106 , 2.17g of aluminum isopropoxide and 1.51g of titanium isopropoxide were completely dissolved in 25mL of absolute ethanol in turn to obtain a clear solution.

[0041] The obtained clear solution was heated to 100° C. for reflux treatment for 24 h to prepare a reaction sol. Then, the obtained reaction sol was subjected to solvent volatilization treatment at 65°C in an open state for 24 hours to obtain a solid sample.

[0042] The obtained solid sample was heated up to 550°C at a heating rate of 2°C / min and roasted for 5 hours to remove the organic template existing in the mesoporous channels, and prepare an ordered mesoporous titanium-aluminum composite oxide sample.

[0043] From figure 1 It can be seen from the XRD spectrum of the sample that the sample shows a strong diffraction peak and two relatively weak diffraction peaks at 2θ=1.16, 1.89 and 2.20°, respectively. T...

Embodiment 2

[0055] Under vigorous stirring at 25°C, 1.2g deionized water, 0.60g glacial acetic acid, 2.8g EO 30 PO 70 EO 30 , 2.17g of aluminum isopropoxide and 1.51g of titanium isopropoxide were completely dissolved in 30mL of absolute ethanol in sequence to obtain a clear solution.

[0056] The obtained clear solution was heated to 90° C. for reflux treatment for 24 h to prepare a reaction sol. Then, the obtained reaction sol was subjected to solvent volatilization treatment at 45° C. for 24 hours in an open state to obtain a solid sample.

[0057] The obtained solid sample was heated to 550°C at a heating rate of 5°C / min and roasted for 5h to remove the organic template existing in the mesoporous channels, and to prepare ordered mesoporous titanium-aluminum composite oxide samples.

[0058] XRD, TEM, EDX and N 2 Adsorption-desorption and other characterization results confirmed that the prepared sample has an ordered two-dimensional hexagonal phase mesoporous channel structure, an...

Embodiment 3

[0061] Under vigorous stirring at 35°C, 1.5g deionized water, 0.60g tartaric acid, 3.5g EO 17 PO 60 EO 17 , 2.35 g of aluminum isopropoxide and 1.20 g of methyl titanate were completely dissolved in 30 mL of absolute ethanol in sequence to obtain a clear solution.

[0062] The obtained clear solution was heated to 80° C. for reflux treatment for 24 h to prepare a reaction sol. Then, the obtained reaction sol was subjected to solvent volatilization treatment at 60°C in an open state for 24 hours to obtain a solid sample.

[0063] The obtained solid sample was heated up to 550°C at a heating rate of 1°C / min and roasted for 5 hours to remove the organic template existing in the mesoporous channels, and prepare an ordered mesoporous titanium-aluminum composite oxide sample.

[0064] XRD, TEM, EDX and N 2 Adsorption-desorption and other characterization results confirmed that the prepared sample has an ordered two-dimensional hexagonal phase mesoporous channel structure, and th...

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Abstract

The invention discloses an ordered mesoporous titanium-aluminum composite oxide, which is obtained by dissolving deionized water, block copolymer nonionic surfactant, organic carboxylic acid, titanium source and aluminum source in absolute ethanol, Composite oxide obtained by reflux treatment, solvent removal and roasting treatment. The composite oxide has a highly regular and ordered two-dimensional hexagonal phase mesoporous structure, the titanium / aluminum species in the pore wall are uniformly dispersed at the atomic level, and the surface of the mesoporous pore wall is rich in ultrafine titanium oxide nanoparticles with an anatase crystal phase structure. grain. It catalyzes CO 2 The dehydrogenation of ethylbenzene to styrene shows extremely high reactivity, styrene selectivity and stability.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic porous catalytic materials, and relates to a metal oxide catalytic material, in particular to an ordered mesoporous titanium-aluminum composite oxide and a preparation method of the composite oxide. The ordered mesoporous titanium-aluminum composite oxide prepared by the invention can be used to catalyze CO 2 Dehydrogenation of ethylbenzene to styrene reaction. Background technique [0002] As one of the most important monomers in petrochemical products, styrene is widely used as a raw material for the production of plastics, resins and synthetic rubber ( Appl. Petrochem. Res. , 2016, 6, 427-437.). At present, nearly 90% of styrene in the market is prepared by the direct dehydrogenation of ethylbenzene through an iron-based catalyst under high-temperature water vapor conditions. Due to the limitation of thermodynamic equilibrium in this preparation process, the equilibrium conve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J35/10B01J37/10B01J37/08C07C5/333C07C15/46
CPCB01J21/063B01J23/002B01J37/10B01J37/082C07C5/3332B01J35/394B01J35/393B01J35/23B01J35/635B01J35/633B01J35/647B01J35/615C07C15/46
Inventor 于峰潘大海茹雨陈树伟闫晓亮范彬彬王永杰李瑞丰
Owner TAIYUAN UNIV OF TECH
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