Process for production of nickel carbonate
AssigneeVale S/A
InventorsTiago Valentim BERNI, Antonio Clareti Pereira, Felipe Hilário Guimarães
Life of this patent
Estimating the term…
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 CO2, 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.
Claims5
A process for production of nickel carbonate comprising the following steps:
- a) preparing a magnesium salt solution;
- b) contacting said solution with a stream of gaseous CO2 while keeping a pH between 4 and 10 and a temperature between 0 and 100° C. during up to 5 hours to produce a first mixture;
- c) contacting the first mixture with a nickel sulphate solution to produce a second mixture;
- d) performing a separation of liquid and solid portions of said second mixture;
- e) feeding step a) with said liquid portion.
Dependencies are inferred from the claim text.