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

1997-07-18

1999-02-16

Straub, Gary P.

Liquid purification or separation

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21050026, 4233271, 501 12, 501 88, 502235, 502407, B01D 3900, C01B 3326

Patent

active

058716467

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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