Method for preparing aluminium-containing MCM-41 inter-aperture molecular screen using metakaolin as raw material

Abstract

The present invention belongs to the field of molecular sieve material synthesizing technology, and is especially method of synthesizing aluminum MCM-41 mesoporous molecular sieve with metakaolin as material. The mixture one metakaolin, Si source, water, template agent, etc. is first prepared into gel and then prepared into Al-MCM-41 mesoporous molecular sieve with different Si / Al ratio through hydrothermal reaction at 100-160 deg.c. The prepared molecular sieve has high specific surface area, high pore volume, thick pore wall, high thermal stability, high acid amount in molecular sieve skeleton, high acidity and low cost.

Description

technical field [0001] The invention belongs to the technical field of material synthesis, and in particular relates to a method for hydrothermally synthesizing Al-MCM-41 mesoporous molecular sieves using metakaolin as a raw material. The method can adjust the skeleton silicon-aluminum ratio in a wide range, and the obtained molecular sieve has high specific surface area and pore volume, and at the same time, the pore wall is thick and has good thermal stability, and the molecular sieve skeleton has a large acid content and strong acidity. Using metakaolin as raw material can reduce the cost of synthetic raw materials. Background technique [0002] Since the researchers of Mobil Corporation reported the M41S series mesoporous molecular sieve for the first time in 1992, due to its special properties, many scholars have been very interested in its synthesis technology, formation mechanism and catalytic application (Kresge C.T., etc.Nature 1992, 359, 719; Beck J.S., etc. J. Am...

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