Patents by Inventor Alvaro Saavedra

Alvaro Saavedra has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Molecular sieves of faujasite structure
    Patent number: 6756029
    Abstract: 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 SiO2/Al2O3 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.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: June 29, 2004
    Assignees: Petroleo Brasileiro S.A.-Petrobras, Akzo Nobel N.V.
    Inventors: Yiu Lau Lam, Alvaro Saavedra, Alexandre de Figueiredo Costa, Anselmo da Silva Santos, Gustavo Torres Moure, Rodolfo Eugenio Roncolatto, Dennis Stamires, Paul O'Connor
  • Molecular sieves of faujasite structure
    Publication number: 20030044350
    Abstract: 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 SiO2/Al2O3 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.
    Type: Application
    Filed: June 7, 2002
    Publication date: March 6, 2003
    Inventors: Yiu Lau Lam, Alvaro Saavedra, Alexandre de Figueiredo Costa, Anselmo da Silva Santos, Gustavo Torres Moure, Rodolfo Eugenio Roncolatto, Dennis Stamires, Paul O'Connor