Aluminum - modified silica and its uses as catalyst

Details Aluminum - modified silica and its uses as catalyst Aluminum - modified silica and its uses as catalyst

B - Operations, Transporting

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B01J 21/08 (2006.01) B01J 29/06 (2006.01) B01J 29/70 (2006.01) C07C 1/20 (2006.01) C07C 2/00 (2006.01) C07C 2/58 (2006.01) C07C 2/66 (2006.01) C07C 2/86 (2006.01) C07C 41/09 (2006.01)

Patent

CA 1131206

ABSTRACT OF THE DISCLOSURE: The present invention is directed to a process for producing an aluminum-modified silica having a porous crystal- line structure, a specific surface area wider than 150 square metres per gram and the formula: 1 Si.(0.0012 - 0.0050) Al.Oy wherein y varies from 2.0018 to 2.0075, comprising the steps of: reacting in an aqueous, alcoholic or hydroalcoholic solu- tion a derivative of silicon and derivative of aluminum with a substance having an archivolt or clathrating effect selected from the group consisting of tertiary amines, aminoalcohols, amioacids and polyalcohols; crystallizing the reaction product in an enclosure for a period of from a few hours to several days at a temperature of from 100°C to 200°C; cooling, filter- ing and drying the crystallizate; firing in air at a tempera- ture comprised between 300°C to 700°C for a time of from 2 hours to 24 hours; washing the calcined product with distilled water, and firing once again in air at a temperature comprised between 300°C and 700°C for a time of from 2 hours to 24 hours. The modified silicas thus obtained are efficient catalyst for a large number of reactions.

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