The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 31, 2015
Filed:
Sep. 30, 2011
Osvaldo DE Lazaro Casagrande Junior, Porto Alegre, BR;
Carlos Rene Klotz Rabello, Rio de Janeiro, BR;
Lucilene Losch DE Oliveira, Porto Alegre, BR;
Ana Helena Dias Pereira Dos Santos, Porto Alegre, BR;
Roberta Campedelli, Porto Alegre, BR;
Adao Lauro Bergamo, Porto Alegre, BR;
Osvaldo de Lazaro Casagrande Junior, Porto Alegre, BR;
Carlos Rene Klotz Rabello, Rio de Janeiro, BR;
Lucilene Losch de Oliveira, Porto Alegre, BR;
Ana Helena Dias Pereira dos Santos, Porto Alegre, BR;
Roberta Campedelli, Porto Alegre, BR;
Adao Lauro Bergamo, Porto Alegre, BR;
Petroleo Brasileiro S.A.—Petrobras, Rio de Janeiro, BR;
Universidade Federal do Rio Grande do Sul-UFRGS, Rio de Janeiro, BR;
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.