Patents by Inventor Cesar Ovalles

Cesar Ovalles 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).

  • Publication number: 20110066441
    Abstract: Disclosed herein is a method involving the steps of (a) precipitating an amount of asphaltenes from a liquid sample of a first hydrocarbon-containing feedstock having solvated asphaltenes therein with one or more first solvents in a column; (b) determining one or more solubility characteristics of the precipitated asphaltenes; (c) analyzing the one or more solubility characteristics of the precipitated asphaltenes; and (d) correlating a measurement of feedstock reactivity for the first hydrocarbon-containing feedstock sample with a mathematical parameter derived from the results of analyzing the one or more solubility characteristics of the precipitated asphaltenes.
    Type: Application
    Filed: July 9, 2010
    Publication date: March 17, 2011
    Inventors: Cesar Ovalles, Estrella Rogel, Michael Moir
  • Patent number: 6171479
    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: May 18, 1999
    Date of Patent: January 9, 2001
    Assignee: Intevep, S.A.
    Inventors: Cesar Ovalles, Alfredo Morales, Luis A. Rivas, Nora Urbano
  • 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: 5891829
    Abstract: A down hole hydroconversion process improves the viscosity, API gravity, and distillate proportions of heavy crude oils by employing a hydrogen donor, methane and steam down hole wherein the mineral formation down hole acts as a catalyst for the hydroconversion process.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: April 6, 1999
    Assignee: Intevep, S.A.
    Inventors: Carlos Vallejos, Tito Vasquez, Cesar Ovalles
  • Patent number: 5321187
    Abstract: A method for preparing a catalyst for conversion of methane to higher hydrocarbons, discloses the steps of: forming a mixture of a manganese aqueous solution and an oxidative agent aqueous solution in an inorganic oxide support material; varying a pH value of the mixture between acidic and basic values to obtain a precipitate of manganese oxide; drying the manganese oxide precipitate; impregnating the dried manganese oxide precipitate with a promoter to obtain an impregnated solid; drying the impregnated solid; and calcining the impregnated solid until a surface atomic ratio of promoter to manganese is at least 5. The catalyst so acquired may be contacted with a methane gas to obtain stable conversion values over extended reaction times.
    Type: Grant
    Filed: January 25, 1993
    Date of Patent: June 14, 1994
    Assignee: Intevep, S.A.
    Inventors: Cesar Ovalles, Nora Urbano, Francisco Rosa
  • Patent number: 5269909
    Abstract: Process obtains improved viscosity and improved distillates proportion in heavy hydrocarbons, as heavy crude oil, by providing a feedstock of heavy hydrocarbons containing a water content of greater than or equal to 1% with respect to the weight of the hydrocarbons and reacting said hydrocarbons with a gas containing methane under pressure and at an elevated temperature.
    Type: Grant
    Filed: October 29, 1991
    Date of Patent: December 14, 1993
    Assignee: Intevep, S.A.
    Inventors: Cesar Ovalles, Antonia Hamana, Rafael Bolivar, Alfredo Morales
  • Patent number: 5212139
    Abstract: A method for preparing a catalyst for conversion of methane to higher hydrocarbons, discloses the steps of forming a mixture of a manganese aqueous solution and an oxidative agent aqueous solution in an inorganic oxide support material; varying a pH value of the mixture between acidic and basic values to obtain a precipitate of manganese oxide; drying the manganese oxide precipitate; impregnating the dried manganese oxide precipitate with a promoter to obtain an impregnated solid; drying the impregnated solid; and calcining the impregnated solid until a surface atomic ratio of promoter to manganese is at least 5. The catalyst so acquired may be contacted with a methane gas to obtain stable conversion values over extended reaction times.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: May 18, 1993
    Assignee: Intevep, S.A.
    Inventors: Cesar Ovalles, Nora Urbano, Francisco Rosa