Preparation method of aluminum-containing layered kenyaite

A technology of hydroxonite and aluminum layer, which is applied in chemical instruments and methods, silicon compounds, inorganic chemistry, etc., can solve the problems of high cost and long synthesis time, and achieve short cycle, warm reaction conditions and high aluminum content Effect

Active Publication Date: 2013-07-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In their method, in order to prepare hydroxonite containing aluminum or other metal elements, it is necessary to u...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 27 g of silica sol (40 SiO 2 wt%, Ludox-40) and 2 grams of aluminum hydroxide colloid (32.7 Al 2 o 3 wt%, Tianjin Jinhui Company) were mixed, followed by stirring at room temperature for 45 minutes.

[0024] Under stirring, 20 g of deionized aqueous solution containing 1.6 g of sodium hydroxide was dropped into the above solution dropwise. Control the drop rate of lye so that no large clots are generated during the process.

[0025]The above mixture was placed in a reaction vessel and crystallized at 150° C. for 72 hours under airtight conditions. After the crystallization reaction, the reaction kettle was naturally cooled to room temperature, and the resulting white solid product was filtered, and the filter cake was washed with 20 times the weight of water and filtered twice (the last filtrate was a clear liquid), and the product was dried at 120°C for 6 hours , to obtain product C1, characterized by X-ray diffraction, C1 has the same diffraction peak as BC1, and ...

Embodiment 2

[0027] 27 g of silica gel (40 SiO 2 wt%, Ludox-40) and 2 grams of aluminum hydroxide solid powder (64.5 Al 2 o 3 wt%, Tianjin Jinhui Company) were mixed, followed by stirring at room temperature for 45 minutes.

[0028] Under stirring, 20 g of deionized aqueous solution containing 1.6 g of sodium hydroxide was dropped into the above solution dropwise. Control the drop rate of lye so that no large clots are generated during the process.

[0029] The above mixture was placed in a reaction vessel, and crystallized at 140° C. for 96 hours under airtight conditions. After the crystallization reaction, the reaction kettle was naturally cooled to room temperature, and the resulting white solid product was filtered, and the filter cake was washed with 20 times the weight of water and filtered twice (the last filtrate was a clear liquid), and the product was dried at 120°C for 6 hours , to obtain product C2, characterized by X-ray diffraction, C2 has the same diffraction peak as BC...

Embodiment 3

[0031] 27 grams of silica gel (40SiO 2 wt%, Ludox-40) and 2 grams of aluminum hydroxide colloid (64.5Al 2 o 3 wt%, Tianjin Jinhui Company) were mixed, followed by stirring at room temperature for one hour.

[0032] Under stirring, 20 g of deionized aqueous solution containing 1.6 g of sodium hydroxide was dropped into the above solution dropwise. Control the drop rate of lye so that no large clots are generated during the process.

[0033] The above mixture was placed in a reaction vessel and crystallized at 150° C. for 72 hours under airtight conditions. After the crystallization reaction, the reaction kettle was naturally cooled to room temperature, and the resulting white solid product was filtered, and the filter cake was washed with 20 times the weight of water and filtered twice (the last filtrate was a clear liquid), and the product was dried at 120°C for 6 hours , to get the product C3. Characterized by X-ray diffraction, C3 has the same diffraction peak as BC1, a...

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Abstract

The invention relates to a preparation method of an aluminum-containing layered kenyaite. The method includes: (1) mixing silicon sol with hydrated alumina or a slurry of hydrated alumina and water, stirring the mixture at room temperature for 20-180min; (2) under stirring at room temperature, introducing a solution of alkali selected from one or more of lithium hydroxide, sodium hydroxide and potassium hydroxide into the mixture obtain in step (1); (3) crystallizing the mixture obtained in step (2) in a closed reactor for 24-170h at 130DEG C-170DEG C; and (4) washing the solid product obtained in step (3) until the filtrate becomes a transparent liquid, thus obtaining the aluminum-containing layered kenyaite. Compared with the existing aluminum-containing kenyaite, the aluminum-containing kenyaite prepared by the method provided in the invention has a high aluminum content and a pure crystal phase. In addition, the method provided by the invention has mild reaction conditions, a short cycle, and needs no introduction of organic matters.

Description

technical field [0001] The invention relates to the field of preparation of aluminum-containing hydroxonite. Background technique [0002] The two-dimensional layered structure material hydroxonite Kenyaite (Na 2 h 2 O(Si 2 o 5 ) 11 ) is a natural mineral whose laminates are made of negatively charged SiO 4 Composed of tetrahedrons, it has good chemical and thermal stability. There are hydrated sodium ions that can be exchanged between the layers. The laminates have good expansibility and can accommodate objects ranging from small protons to macromolecules and proteins. Various properties The composite material formed by different guest molecules and inorganic layered host materials has important application value in the fields of catalysis, adsorption and new functional materials. The regularity of the Kenyaite layer structure and the controllability of the layer spacing make it an important field in the preparation of functional composite materials. One of the import...

Claims

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Application Information

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IPC IPC(8): C01B33/00
Inventor 毕云飞李洪宝李明丰杨清河夏国富聂红李大东
Owner CHINA PETROLEUM & CHEM CORP
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