Patents by Inventor Luis A. Rivas

Luis A. Rivas 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: 6017845
    Abstract: A process comprises providing a catalyst comprising a support, a microwave absorption material, and a catalytically active phase; heating the catalyst with a source of microwave energy which is absorbed by said microwave absorption material to increase the temperature of the catalyst to a desired temperature; and contacting said heated catalyst with a hydrocarbon feedstock for upgrading same.
    Type: Grant
    Filed: July 14, 1998
    Date of Patent: January 25, 2000
    Assignee: Intevep, S.A.
    Inventors: Cesar Ovalles, Alfredo Morales, Luis A. Rivas, Nora Urbano
  • 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
  • Patent number: 4701435
    Abstract: A method for producing a catalyst for use in the hydrotreatment, hydrodemetallization and hydrocracking of heavy hydrocarbon feedstocks containing high metal levels of vanadium, nickel and sulfur comprises the steps of preparing a carrier from a naturally occurring material consisting essentially of magnesium silicate having a sheet-type structure, iron and nickel wherein the carrier is prepared directly from the above naturally occurring material or, in the alternative, it can be prepared from the naturally occurring material in combination with a catalyst component. In the event the carrier for the catalyst is prepared from the above naturally occurring material without the addition of the catalyst component, the carrier can be impregnated with the catalyst component. The resultant catalyst is particularly useful in the treatment of heavy hydrocarbon feedstocks.
    Type: Grant
    Filed: April 7, 1986
    Date of Patent: October 20, 1987
    Assignee: Intevep, S.A.
    Inventors: Juan J. Garcia, Roberto E. Galiasso, Magdalena M. Ramirez de Agudelo, Luis Rivas, Juan Hurtado