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. 10, 2014
Filed:
Mar. 26, 2012
Tiago Valentim Berni, Belo Horizonte, BR;
Antonio Clareti Pereira, Belo Horizonte, BR;
Felipe Hilario Guimar{hacek Over (A)}es, Sào José da Lapa, BR;
Tiago Valentim Berni, Belo Horizonte, BR;
Antonio Clareti Pereira, Belo Horizonte, BR;
Felipe Hilario Guimar{hacek over (a)}es, Sào José da Lapa, BR;
Vale S.A., Rio de Janeiro, BR;
Abstract
Aspects of the present invention refers to a process for production of nickel carbonate including preparing a magnesium salt solution, contacting the solution with a stream of gaseous CO, keeping pH between 4 and 10 and temperature between 0 and 100° C., during up to 5 hours to produce a first mixture, contacting the first mixture with a nickel sulphate solution to produce a second mixture, performing a separation of liquid and solid portions of the second mixture, and feeding the magnesium salt solution with the liquid portion. This process recycles the reagent used for producing nickel carbonate and yields a final product that is easy to handle and transport.