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Preparation method of Al-Mg double-metal composite mesoporous oxide

A composite mesoporous and oxide technology, applied in the direction of alumina/aluminum hydroxide, etc., can solve the limited problems, and achieve the effect of large specific surface area, good reduction performance, and easy loading.

Inactive Publication Date: 2018-05-29
JIANGSU SAILBOAT PETROCHEMICAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there are currently limited reactions to test the catalytic performance of mesoporous alumina.

Method used

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  • Preparation method of Al-Mg double-metal composite mesoporous oxide
  • Preparation method of Al-Mg double-metal composite mesoporous oxide
  • Preparation method of Al-Mg double-metal composite mesoporous oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1, a kind of preparation method of Al-Mg bimetal composite mesoporous oxide, its steps are as follows: appropriate template agent SAA, Al(NO 3 ) 3 9H 2 O and Mg(NO 3 ) 2 ·6H 2 Dissolve O in an appropriate amount of deionized water; stir thoroughly, keep the temperature at 35°C for 0.5 h, then heat the reaction system to 70°C, continue to stir, and slowly add ethylenediamine dropwise to adjust the pH of the system, add urea, and keep the temperature constant After reacting for 6 hours, stop the reaction; crystallize at room temperature for 10 hours, suction filter, wash, and dry; roast at 500 °C to obtain Al-Mg bimetallic composite mesoporous oxide.

[0042] The molar ratio of each raw material is: n (Al): n (Mg): n (SAA): n (CO(NH 2 ) 2 ): n (H 2 NCH 2 CH 2 NH 2 ): n (H 2 O)

[0043] =1:1:0.5:0.05:1.0:100.

Embodiment 2

[0044] Embodiment 2, a kind of preparation method of Al-Mg bimetallic composite mesoporous oxide, its steps are as follows: appropriate template agent SAA, Al(NO 3 ) 3 9H 2 O and Mg(NO 3 ) 2 ·6H 2 Dissolve O in an appropriate amount of deionized water; stir thoroughly, keep the temperature at 45°C for 1.5 h, then heat the reaction system to 80°C, continue to stir, and slowly add ethylenediamine dropwise to adjust the pH value of the system, add urea, and keep the temperature constant After reacting for 10 h, stop the reaction; crystallize at room temperature for 14 h, suction filter, wash, and dry; roast at 750 °C to obtain Al-Mg bimetallic composite mesoporous oxide.

[0045] The molar ratio of each raw material is: n (Al): n (Mg): n (SAA): n (CO(NH 2 ) 2 ): n (H 2 NCH 2 CH 2 NH 2 ): n (H 2 O)

[0046] =100:1:1.5:0.2:2.0:300.

Embodiment 3

[0047]Embodiment 3, a kind of preparation method of Al-Mg bimetal composite mesoporous oxide, its steps are as follows: appropriate template agent SAA, Al(NO 3 ) 3 9H 2 O and Mg(NO 3 ) 2 ·6H 2 Dissolve O in an appropriate amount of deionized water; stir thoroughly, keep the temperature at 40°C for 1 h, then heat the reaction system to 75°C, continue to stir, and slowly add ethylenediamine dropwise to adjust the pH value of the system, add urea, and keep the temperature constant After reacting for 8 h, stop the reaction; crystallize at room temperature for 12 h, suction filter, wash, and dry; roast at 650 °C to obtain Al-Mg bimetallic composite mesoporous oxide.

[0048] The molar ratio of each raw material is: the ratio of n(Al):n(Mg) is 40:1, 7:1 or 80:1;

[0049] n (Mg): n (SAA): n (CO(NH 2 ) 2 ): n (H 2 NCH 2 CH 2 NH 2 ): n (H 2 O)

[0050] =1:1:0.1:1.6:200.

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Abstract

The invention relates to a preparation method of Al-Mg double-metal composite mesoporous oxide. The preparation method comprises the following steps: dissolving a proper amount of template agents SAA,Al(NO3)3.9H2O and Mg(NO3)2.6H2O into a proper amount of deionized water; completely stirring, maintaining constant temperature at 35 to 45 DEG C, heating to 70 to 80 DEG C, continuously stirring, adding ethanediamine slowly and dropwise, adjusting the pH value, adding urea, performing constant-temperature reaction and stopping reaction; performing crystallization at room temperature, performing suction filtration, washing and drying; roasting to obtain the Al-Mg double-metal composite mesoporous oxide. The prepared Al-Mg double-metal composite mesoporous oxide is a non-silicated composition mesoporous material, has a strong acid part and a weak acid part on the surface of gamma-Al2O3, and also has narrow pore diameter distribution and large specific surface area of the mesoporous aluminumoxide; different electric potential on the surface enables different metal ions to be loaded easily and the pore channel shape and size to be adjustable.

Description

technical field [0001] The invention relates to a preparation method of Al-Mg bimetal composite mesoporous oxide, and also relates to the structural characterization and performance analysis of the mesoporous molecular sieve catalyst. Background technique [0002] Mesoporous materials have narrow pore distribution and regular pore structure. This kind of mesoporous materials have regular and adjustable pore channels, large specific surface area and pore diameter, and good stability. Mesoporous materials with no-silicate compositions mainly include transition Metal oxides, phosphates, and sulfides, etc., generally have variable valence states, which may open up new application fields for mesoporous materials and show application prospects beyond the reach of silicon-based mesoporous materials, and have attracted increasing attention. Most of the mesoporous phases synthesized in the early stage have a layered structure. When the surfactant is removed, an ordered mesoporous str...

Claims

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Application Information

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IPC IPC(8): C01F7/02
CPCC01F7/02C01P2002/72C01P2004/03C01P2004/82C01P2006/12C01P2006/14C01P2006/16
Inventor 高树刚宋伟明安红赵耀张千一
Owner JIANGSU SAILBOAT PETROCHEMICAL CO LTD
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