Middle-pore silicon-aluminium material and its preparing method

This is a kind of middle porous silicon aluminum material. Its 27Al MAS NMR spectrogram basically has no apex at the chemical displacement 0ppm position, but has the only apex at the 51.7 mm position; the aluminum content in the silicon aluminum material counted with the weight of Al2O3 is 1.0 - 30%...

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Bibliographic Details
Main Author WEIJIA,HE WANG
Format Patent
LanguageEnglish
Published 21.12.2005
Edition7
Subjects
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:This is a kind of middle porous silicon aluminum material. Its 27Al MAS NMR spectrogram basically has no apex at the chemical displacement 0ppm position, but has the only apex at the 51.7 mm position; the aluminum content in the silicon aluminum material counted with the weight of Al2O3 is 1.0 - 30%; its specific surface area is 100 - 350 m2/g; its hole content is 0.4 - 0.8 mL/g; its average aperture is 14 - 30 nm; and its most probable aperture is 10 - 30 nm. The material is made as follows: neutralize silicon source and acid solution into colloid when mixed, add aluminum source after laid to aging, after equably mixed, aging, dry, ammonium exchange, again dry. The center holes of the material distributes concentratively and their apertures are rather big; it has bigger specific surface area and hole volume; the Al atoms in the material almost all exist as four coordination style, after ammonium exchange, it can be used as the carrier of cracking catalyst or directly used as catalyst.
Bibliography:Application Number: CN2004148099