Other

Alvaro Saavedra

Dennis N Stamires

Paul O'Connor

Gustavo Torres Moure

Rodolfo Eugenio Roncolatto

Yiu Lau Lam

Alexandre De Figueiredo Costa

Anselmo Da Silva Santos

A process for preparing molecular sieves of type Y faujasite structure is described, as well as pre-shaped bodies of faujasite structure type Y molecular sieves. The process comprises preparing a precursor gel from a source of silica-alumina or a source of alumina and a source of silica with a template agent at a SiO /Al O greater than 7 and suitable for forming a type Y zeolite, drying the precursor gel and contacting the dried precursor gel with steam, optionally followed by caustic washing, without the formation of crystalline phases other than type Y zeolite being observed. Advantageously, the pre-shaped bodies prepared with the precursor gel of Y zeolite, when subjected to the process of the invention, will have their outer surface covered by type Y zeolite crystals. The molecular sieves so obtained may be employed as catalysts or adsorbents in various processes of the chemical or oil industry.

Molecular sieves of faujasite structure

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Rio de Janeiro, Brazil

Alvaro Saavedra