Patents by Inventor Lúcia Cristina Ferreira Leite

Lúcia Cristina Ferreira Leite 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: 8231777
    Abstract: The present invention comprises a thermocatalytic cracking process for the production of diesel oil from a charge of vegetable origin made from seeds of oleaginous plants in refineries possessing at least two FCC reactors. At least one of such reactors processes heavy gas oil or residue under conventional conditions while at least one of such reactors processes the charge of vegetable origin made from seeds of oleaginous plants under conditions suitable, for production of diesel oil. Said process employs the same catalyst utilized in the fluid catalytic cracking process which, simultaneously, processes a conventional charge. The diesel, or biodiesel, oil produced by means of said process is of superior quality having a cetane number exceeding 40 given that the cracking reactions occur at low temperatures and the products obtained are less oxidized and consequently purer than products obtained by means of existing technology.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: July 31, 2012
    Assignee: Petroleo Brasileiro S.A.—Petrobras
    Inventors: Mauro Silva, Andrea de Rezende Pinho, Wilson Kenzo Huziwara, Amilcar Pereira da Silva Neto, Carlos Nagib Khalil, Julio Amilcar Ramos Cabral, Lúcia Cristina Ferreira Leite, Luiz Carlos Casavechia, Raul de Carvalho Silva
  • Publication number: 20080313955
    Abstract: The present invention comprises a thermocatalytic cracking process for the production of diesel oil from a charge of vegetable origin made from seeds of oleaginous plants in refineries possessing at least two FCC reactors. At least -one of such reactors processes heavy gas oil or residue under conventional conditions whilst at least one of such reactors processes the charge of vegetable origin made from seeds of oleaginous plants under conditions suitable, for production of diesel oil. Said process employs the same catalyst utilised in the fluid catalytic cracking process which, simultaneously, processes a conventional charge. The diesel, or biodiesel, oil produced by means of said process is of superior quality having a cetane number exceeding 40 given that the cracking reactions occur at low temperatures and the products obtained are less oxidised and consequently purer than products obtained by means of existing technology.
    Type: Application
    Filed: June 17, 2008
    Publication date: December 25, 2008
    Applicant: PETROLEO BRASILEIRO S.A. -PETROBRAS
    Inventors: Mauro Silva, Andrea de Rezende Pinho, Wilson Kenzo Huziwara, Amilcar Pereira Da Silva Neto, Carlos Nagib Khalil, Julio Amilcar Ramos Cabral, Lucia Cristina Ferreira Leite, Luiz Carlos Casavechia, Raul de Carvalho Silva
  • Patent number: 7112229
    Abstract: An integrated process is described for producing biodiesel from oleaginous seeds, preferably castor bean seeds. The inventive process includes a transesterification reaction where the seeds themselves react with anhydrous ethyl alcohol in the presence of an alkaline catalyst. The resulting ethyl esters are then separated by decantation and neutralized and used as fuel for diesel engines, co-solvents for diesel and gasoline mixtures with anhydrous or hydrated ethyl alcohol. The solid fractions may be used as fertilizers, for feeding cattle and as a raw material for producing ethyl alcohol.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: September 26, 2006
    Assignee: Petroleo Brasileiro S.A. -Petrobras
    Inventors: Carlos Nagib Khalil, Lúcia Cristina Ferreira Leite
  • Patent number: 6035933
    Abstract: A process for the thermo-hydraulic control of gas hydrates in subsea production and injection wells as well as pipelines which transport liquid or gaseous hydrocarbons is described, the process making use of a Nitrogen Generating System foamed or in solution. The control may signify the prevention of the formation of the gas hydrates or the dissolution of the gas hydrate plug already formed. Under conditions of use designed for the prevention of the formation of gas hydrates the SGN fluid prevents the thermal conditions leading to the gas hydrate plugs. Under conditions of use designed to dissolve the already formed gas hydrate plugs, the SGN fluid alters the thermo-hydraulic conditions which favor the gas hydrate plugs, so that they are dissolved and return to the water+gas phase.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: March 14, 2000
    Assignee: Petroleo Brasileiro S.A.-Petrobras
    Inventors: Carlos Nagib Khalil, Nelson De Oliveira Rocha, Lucia Cristina Ferreira Leite
  • Patent number: 5891262
    Abstract: An on-line, thermo-chemical process for the dewaxing of oil export pipelines with the aid of a Nitrogen Generating System is described, wherein the treating fluid to be employed as dewaxing fluid comprises: a) a solution of nitrogen salts activated by emulsified acetic acid and designed to yield nitrogen and heat, and b) a solvent, which is the petroleum oil being produced. The dewaxing treatment is effected at the same time as the petroleum oil is produced, this leading to great savings in costs and energy.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: April 6, 1999
    Assignee: Petroleo Brasileiro S.A.-Petrobras
    Inventors: Carlos Nagib Khalil, Lucia Cristina Ferreira Leite, Nelson De Oliveira Rocha