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Method for preparing mesoporous material by non-surface activator process

A non-surfactant, mesoporous material technology, applied in chemical instruments and methods, non-metallic elements, molecular sieve catalysts, etc., can solve damage, reduce the degree of organicization of hybrid materials, and hydrothermal stability of hybrid mesoporous molecular sieves Reduce and other problems, to achieve the effect of good adsorption performance and excellent adsorption effect

Inactive Publication Date: 2007-10-31
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the surfactant is removed after organic functionalization, the newly modified organic functional groups will be damaged to varying degrees, which will also reduce the degree of organicization of the hybrid material and reduce the hydrothermal stability of the hybrid mesoporous molecular sieve.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Mix methylhydrogenpolysiloxane: ethanol in the conical flask at a ratio of 1:50 by volume, and then add NaOH with a weight ratio of methylhydrogenpolysiloxane: NaOH = 500:1. Stir vigorously on the stirrer for 12h; add deionized water equal to the volume of methylhydrogenpolysiloxane to the above solution dropwise, and after stirring for 1h, add Ethyl ester = 1:3 tetraethyl orthosilicate, after stirring vigorously for 2 hours, the gel was obtained after standing and aging for 24 hours; the obtained gel was dried in an oven at 60°C for 12 hours, and the ethanol in the system was removed to obtain a block White transparent solid. The obtained product was ground into powder, washed with deionized water, and dried in an oven at 60° C. for 12 hours to obtain the desired mesoporous molecular sieve. The mesoporous phase with 3D worm-hole like channels was measured by high-resolution electron microscopy. The properties of the mesoporous molecular sieve are shown in Table 1.

Embodiment 2

[0019] Mix methylhydrogenpolysiloxane: ethanol in the conical flask at a ratio of 1:200 by volume, and then add NaOH with a weight ratio of methylhydrogenpolysiloxane: NaOH = 100:1. Stir vigorously on the stirrer for 24 hours; add deionized water equal to the volume of methyl hydrogen-containing polysiloxane to the above solution dropwise, and after stirring for 2 hours, add a volume ratio of methyl hydrogen-containing polysiloxane:orthosilicic acid Ethyl ester = 1:10 tetraethyl orthosilicate, after stirring vigorously for 5 hours, the gel was obtained after standing and aging for 60 hours; the obtained gel was dried in an oven at 90°C for 36 hours, and the ethanol in the system was removed to obtain a block White transparent solid. The obtained product was ground into powder, washed with deionized water, and dried in an oven at 90° C. for 36 hours to obtain the desired mesoporous molecular sieve. The mesoporous phase with 3D worm-hole like channels was measured by high-resol...

Embodiment 3

[0021] Mix methylhydrogenpolysiloxane: ethanol in the conical flask at a volume ratio of 1:80, and then add NaOH with a weight ratio of methylhydrogenpolysiloxane: NaOH = 400:1. Stir vigorously on the stirrer for 15 hours; add deionized water equal to the volume of methylhydrogenpolysiloxane to the above solution dropwise, and after stirring for 1h, add a volume ratio of methylhydrogenpolysiloxane:orthosilicic acid Ethyl ester = 1:5 tetraethyl orthosilicate, after stirring vigorously for 2 hours, the gel was obtained after standing and aging for 24 hours; the obtained gel was dried in an oven at 60°C for 12 hours, and the ethanol in the system was removed to obtain a block White transparent solid. The obtained product was ground into powder, washed with deionized water, and dried in an oven at 70° C. for 15 hours to obtain the desired mesoporous molecular sieve. The mesoporous phase with 3D worm-hole like channels was measured by high-resolution electron microscopy. The prope...

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PUM

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Abstract

The invention discloses a preparing method of medium hole material with non-surface activator method, which comprises the following steps: mixing metyl group with hydrogen polysiloxane and alcohol; adding into NaOH; vigorous stirring; dipping into deionized water with equivoluminal metyl group hydrogen polysiloxane; stirring; adding into silicic acid carbethoxyl; vigorous stirring; strewing and aging; drying; getting solid; grinding to powder; washing with deionized water; drying; getting the product. This invention possesses medium phase of 3D worm-hole like pore path with the specific surface area in the range of 450-700m2 / g and hole volume in the range of 0. 4-1. 8cm3g-1.

Description

technical field [0001] The invention relates to a method for synthesizing mesoporous materials, in particular to preparing organic-inorganic hybrid mesoporous materials by using a sol-gel method. technical background [0002] Mesoporous material is a new type of nanomaterial with a pore size of 2-50nm. It is also a "production base" for other nanomaterials and a "microreactor" for many green chemical reactions. Pure silicon or silicon-alumina mesoporous molecular sieves with adjustable pore size and high specific surface area have very broad application prospects in catalytic reactions, adsorption and separation, preparation of nanomaterials, optical and electromagnetic materials. At present, it has become one of the research hotspots in the fields of chemical industry, information communication, biotechnology, and environmental energy. [0003] In 1992, the staff of Mobil successfully prepared M41S silica (aluminum)-based mesoporous molecular sieves with a pore size larger...

Claims

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Application Information

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IPC IPC(8): C01B39/00C01B37/00B01J29/00B01J20/18
Inventor 徐耀王俊刚杨东江吴东孙予罕
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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