Patents by Inventor Juan A. Lujano

Juan A. Lujano 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).

  • Method for recharging a spend fluid catalytic cracking process catalyst
    Patent number: 5360774
    Abstract: A zeolitic material with a crystalline structure of MFI type has a ratio of silica to alumina which is lower than 26, and is hydrothermally prepared without organic template reagents or seeding procedures. Crystalline structure is obtained by forming a mixture of a silicon dioxide source, an alkali metal hydroxide, an aluminum source and water, all reactants with the following molar ratios: ##EQU1## where M is an alkali metal, and reacting the mixture at a temperature from 160.degree. to 180.degree. C. for 40-80 hours. The material is characterized by X-ray diffraction, and has good cracking activity and improved selectivity for gasoline octanes.
    Type: Grant
    Filed: August 9, 1993
    Date of Patent: November 1, 1994
    Assignee: Intevep, S.A.
    Inventors: Nelson P. Martinez, Juan A. Lujano, Nieves Alvarez, Francisco Machado, Carmen M. Lopez
  • Zeolitic catalyst of MFI type, its preparation and use
    Patent number: 5254327
    Abstract: A zeolitic material with a crystalline structure of MFI type has a ratio of silica to alumina which is lower than 26, and is hydrothermally prepared without organic template reagents or seeding procedures. Crystalline structure is obtained by forming a mixture of a silicon dioxide source, an alkali metal hydroxide, an aluminum source and water, all reactants with the following molar ratios: ##EQU1## where M is an alkali metal, and reacting the mixture at a temperature from 160.degree. to 180.degree. C. for 40-80 hours. The material is characterized by X-ray diffraction, and has good cracking activity and improved selectivity for gasoline octanes.
    Type: Grant
    Filed: April 3, 1992
    Date of Patent: October 19, 1993
    Assignee: Intevep, S.A.
    Inventors: Nelson P. Martinez, Juan A. Lujano, Nieves Alvarez, Francisco Machado, Carmen M. Lopez
  • Method of making a conversion catalyst having an anatase vanadium passivating agent for treating a heavy hydrocarbon feedstock
    Patent number: 4894354
    Abstract: A method for making a catalyst containing a vanadium passivating agent in the form of anatase crystalline TiO.sub.2 including a method for processing hydrocarbon feeds containing vanadium.
    Type: Grant
    Filed: October 28, 1988
    Date of Patent: January 16, 1990
    Assignee: Intevep, S.A.
    Inventors: Nelson P. Martinez, Jose R. Velasquez, Juan A. Lujano
  • Cracking heavy hydrocarbon feedstocks with a catalyst comprising an anatase vanadium passivating agent
    Patent number: 4816135
    Abstract: A method for making a catalyst containing a vanadium passivating agent in the form of anatase crystalline TiO.sub.2 including a method for processing hydrocarbon feeds containing vanadium.
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: March 28, 1989
    Assignee: Intevep, S.A.
    Inventors: Nelson P. Martinez, Jose R. Velasquez, Juan A. Lujano
  • Vanadium passivating agent for use in a cracking catalyst
    Patent number: 4704375
    Abstract: A catalyst containing a vanadium passivating agent in the form of anatase crystalline TiO.sub.2.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: November 3, 1987
    Assignee: Intevep, S.A.
    Inventors: Nelson P. Martinez, Jose R. Valasquez, Juan A. Lujano