Porous amorphous silica-alumina refractory oxides, their prepara

Details Porous amorphous silica-alumina refractory oxides, their prepara Porous amorphous silica-alumina refractory oxides, their prepara

1998-08-25

2000-03-28

Straub, Gary P.

Liquid purification or separation

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Material

21050025, 21050026, 501 80, 502235, 502407, 4233271, 4233282, B01D 3900

Patent

active

060427272

ABSTRACT:
A process for preparing a porous amorphous silica-alumina refractory oxide is described in which a source of silica, such as tetra ethyl ortho silicate, in a non-aqueous solvent, such as an alcohol, is hydrolysed by adding an aqueous solution containing aluminum ions, in particular a solution of aluminum nitrate, thereby to form a sol and calcining the sol at, for example, 200.degree. C. to 600.degree. C. The product, which may have a microporous or mesoporous structure, is useful in the separation of fluids, especially the separation of carbon dioxide from natural gas.

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