Patents by Inventor Daisy Rojas

Daisy Rojas 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).

  • Patent number: 5710093
    Abstract: A catalyst support includes substantially spherical particles of a substantially homogeneous mixture of at least two compounds selected from the group consisting of refractory inorganic oxides, refractory inorganic carbides, refractory inorganic nitrides and mixtures thereof, wherein said particles have a surface area of at least about 30 m.sup.2 /g, an average pore diameter of at least about 150 .ANG., and a particle size of at least about 0.1 mm. The support may be used in a catalyst system to support a Group IVb and a Group VIII metal in a catalyst system useful for hydrogenation of carbon monoxide into C.sub.2 + hydrocarbons. A method is also provided for preparing the catalyst support and system.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: January 20, 1998
    Assignee: Intevep, S.A.
    Inventors: Luis A. Rivas, Enzo Peluso, Daisy Rojas, Juan Jose Garcia
  • Patent number: 5677257
    Abstract: A catalyst support includes substantially spherical particles of a substantially homogeneous mixture of at least two compounds selected from the group consisting of refractory inorganic oxides, refractory inorganic carbides, refractory inorganic nitrides and mixtures thereof, wherein said particles have a surface area of at least about 30 m.sup.2 /g, an average pore diameter of at least about 150 .ANG., and a particle size of at least about 0.1 mm. The support may be used in a catalyst system to support a Group IVb and a Group VIII metal in a catalyst system useful for hydrogenation of carbon monoxide into C.sub.2 + hydrocarbons. A method is also provided for preparing the catalyst support and system.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: October 14, 1997
    Assignee: Intevep, S.A.
    Inventors: Luis A. Rivas, Enzo Peluso, Daisy Rojas, Juan Jose Garcia
  • Patent number: 5648312
    Abstract: A catalyst support includes substantially spherical particles of a substantially homogeneous mixture of at least two compounds selected from the group consisting of refractory inorganic oxides, refractory inorganic carbides, refractory inorganic nitrides and mixtures thereof, wherein said particles have a surface area of at least about 30 m.sup.2 /g, an average pore diameter of at least about 150 .ANG., and a particle size of at least about 0.1 mm. The support may be used in a catalyst system to support a Group IVb and a Group VIII metal in a catalyst system useful for hydrogenation of carbon monoxide into C.sub.2 + hydrocarbons. A method is also provided for preparing the catalyst support and system.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: July 15, 1997
    Assignee: Intevep, S.A.
    Inventors: Luis A. Rivas, Enzo Peluso, Daisy Rojas, Juan Jose Garcia