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:
Jun. 25, 2013
Filed:
Jun. 01, 2009
Antonio Clareti Pereira, Belo Horizonte, BR;
Felipe Hilario Guimaraes, Centrom Sao Jose de Lapa, BR;
Joao Alberto DE Lessa Tude, Salvador, BR;
Lino Rodrigues DE Freitas, Lagoa Santa, BR;
Tiago Valentim Berni, Belo Horizonte, BR;
Antonio Clareti Pereira, Belo Horizonte, BR;
Felipe Hilario Guimaraes, Centrom Sao Jose de Lapa, BR;
Joao Alberto de Lessa Tude, Salvador, BR;
Lino Rodrigues de Freitas, Lagoa Santa, BR;
Tiago Valentim Berni, Belo Horizonte, BR;
Vale S.A., Rio de Janeiro, BR;
Abstract
The present invention resides in a process of recovering nickel and cobalt, regenerating the main raw materials, said process including the steps of: granulometric separation; leaching; neutralization; MHP production in only one stage and the pressure crystallization of magnesium sulphite. The process proposes a way to recovery nickel and cobalt from laterite ores through the atmospheric and heap leaching with staged addition of ore—by size separation—and HSO, decreasing the nickel losses and simplifying the neutralization circuit and producing a more purified MHP. The present process route is employed for nickel extraction, including the one from high magnesium containing lateritic ores.