Process of separating cobalt from nickel by means of ammonia
Abstract
Abstract A METHOD IS PROVIDED FOR SEPARATING NICKEL FROM COBALT CONTAINED IN NICKEL-COBALT ACID SOLUTIONS WHEREBY TO PRODUCE A HIGHLY ENRICHED NICKEL PRODUCT LOW IN COBALT WHEREIN THE NICKEL-COBALT ACID SOLUTION IS TREATED AT AMBIENT TEMPERATURE WITH A PREDETERMINED AMOUNT OF AMMONIA TO PRODUCE A NICKEL-AMMONIA COMPLEX, AN AMMONIUM ACID-SALT AND A COBALT-CONTAINING PRECIPITATE OR CONCENTRATE WHICH IS SEPARATED FROM THE SOLUTION, THE AMMONIUM ION CONCENTRATION OF THE ACID-SALT BEING MAINTAINED BELOW 0.3 MOLE PER LITER. THE NICKEL IS THEREAFTER RECOVERED FROM THE SOLUTION. IN ITS PREFERRED ASPECTS, THE SOLUTION, AFTER REMOVAL OF THE COBALT-CONTAINING PRECIPITATE, IS HEATED TO AN ELEVATED TEMPERATURE OF AT LEAST ABOUT 50*C. TO FORM A SECOND COBALT-CONTAINING PRECIPITATE WHICH IS SEPARATED FROM THE SOLUTION, A HIGHLY ENRICHED NICKEL PRODUCT BEING THEREAFTER RECOVERED FROM THE SOLUTION BY KNOWN MEANS, SUCH AS IN THE FORM OF NICKEL HYDROXIDE, NICKEL OXIDE, METALLIC NICKEL POWDER, OR OTHER FORM.
Inventors
- 👤 R Crnojevich
- 👤 D Lowe
Bibliographic Details
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