Patents by Inventor Ana Helena Dias Pereira dos Santos

Ana Helena Dias Pereira dos Santos 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).

  • Chromium and nickel catalysts for oligomerization reactions and process for obtaining alpha-olefins using said catalysts
    Patent number: 8993775
    Abstract: The present invention refers to the synthesis of precatalysts and the use of such precatalysts in ethylene oligomerization reactions for the selective production of alpha-olefins. More specifically, it refers to the preparation and use of coordination compounds containing polydentate ligands comprising Group 6 and 10 transition metal compounds, in particular chromium (III) and nickel (II). Such catalytic precursors present high catalytic activity and selectivity for the production of alpha-olefins.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: March 31, 2015
    Assignees: Petroleo Brasileiro S.A.—Petrobras, Universidade Federal do Rio Grande do Sul-UFRGS
    Inventors: Osvaldo de Lazaro Casagrande Junior, Carlos Rene Klotz Rabello, Lucilene Losch de Oliveira, Ana Helena Dias Pereira dos Santos, Roberta Campedelli, Adao Lauro Bergamo
  • Chromium and nickel catalysts for oligomerization recations and process for obtaining alpha-olefins using said catalysts
    Publication number: 20120178939
    Abstract: The present invention refers to the synthesis of precatalysts and the use of such precatalysts in ethylene oligomerization reactions for the selective production of alpha-olefins. More specifically, it refers to the preparation and use of coordination compounds containing polydentate ligands comprising Group 6 and 10 transition metal compounds, in particular chromium (III) and nickel (II). Such catalytic precursors present high catalytic activity and selectivity for the production of alpha-olefins.
    Type: Application
    Filed: September 30, 2011
    Publication date: July 12, 2012
    Applicants: UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL - UFRGS, PETROLEO BRASILEIRO S.A. - PETROBRAS
    Inventors: Osvaldo de Lazaro Casagrande Junior, Carlos Rene Klotz Rabello, Lucilene Losch de Oliveira, Ana Helena Dias Pereira dos Santos, Roberta Campedelli, Adao Lauro Bergamo