Abstract 1. IN THE HYDROMETALLURGICAL RECOVERY OF NICKEL FROM A NICKEL BEARING SOURCE IN WHICH TREATED METAL-CONTAINING MATERIAL IS SUBJECED TO OXIDATIVE LEACHING WITH AN AMMONIACAL SOLUTION TO DISSOLVE THE METAL, THE IMPROVEMENT WHICH COMPROSES PRETREATING SAID NICKEL BEARING SOURCE AT A TEMPERATURE OF FROM 50* TO 250*F., WITH AN AQUEOUS SOLUTION OF A HYDROGEN HALIDE, SAID HYDROGEN HALIDE CONCENTRATION IN SAID SOLUTION BEING FROM ABOUT 0.1% TO ABOUT 15%, THE AMOUNT OF SAID HYDROGEN HALIDE SOLUTION BEING FROM ABOUT 10% TO ABOUT 150% BY WEIGHT OF THE NICKEL BEARING SOURCE, AND THEREAFTER SUBJECTING THE PRETREATED NICKEL BEARING SOURCE TO A REDUCING TREATMENT UTILIZING A REDUCING GAS AT A TEMPERATURE OF FROM ABOUT 1,000* TO ABOUT 1800*F. TO PROVIDE A REDUCED NICKEL BEARING SOURCE.
IN THE HYDROMETALLURGICAL RECOVERY OF NICKEL FROM A NICKEL BEARING SOURCE IN WHICH TREATED METAL-CONTAINING MATERIAL IS SUBJECED TO OXIDATIVE LEACHING WITH AN AMMONIACAL SOLUTION TO DISSOLVE THE METAL, THE IMPROVEMENT WHICH COMPROSES PRETREATING SAID NICKEL BEARING SOURCE AT A TEMPERATURE OF FROM 50* TO 250*F., WITH AN AQUEOUS SOLUTION OF A HYDROGEN HALIDE, SAID HYDROGEN HALIDE CONCENTRATION IN SAID SOLUTION BEING FROM ABOUT 0.1% TO ABOUT 15%, THE AMOUNT OF SAID HYDROGEN HALIDE SOLUTION BEING FROM ABOUT 10% TO ABOUT 150% BY WEIGHT OF THE NICKEL BEARING SOURCE, AND THEREAFTER SUBJECTING THE PRETREATED NICKEL BEARING SOURCE TO A REDUCING TREATMENT UTILIZING A REDUCING GAS AT A TEMPERATURE OF FROM ABOUT 1,000* TO ABOUT 1800*F. TO PROVIDE A REDUCED NICKEL BEARING SOURCE.
Claim 2
Dependent Claim
122 words
IN THE HYDROMETALLURGICAL RECOVERY OF NICKEL FROM A NICKEL BEARING SOURCE IN WHICH TREATED METAL-CONTAINING MATERIAL IS SUBJECED TO OXIDATIVE LEACHING WITH AN AMMONIACAL SOLUTION TO DISSOLVE THE METAL, THE IMPROVEMENT WHICH COMPROSES PRETREATING SAID NICKEL BEARING SOURCE AT A TEMPERATURE OF FROM 50* TO 250*F., WITH AN AQUEOUS SOLUTION OF A HYDROGEN HALIDE, SAID HYDROGEN HALIDE CONCENTRATION IN SAID SOLUTION BEING FROM ABOUT 0.1% TO ABOUT 15%, THE AMOUNT OF SAID HYDROGEN HALIDE SOLUTION BEING FROM ABOUT 10% TO ABOUT 150% BY WEIGHT OF THE NICKEL BEARING SOURCE, AND THEREAFTER SUBJECTING THE PRETREATED NICKEL BEARING SOURCE TO A REDUCING TREATMENT UTILIZING A REDUCING GAS AT A TEMPERATURE OF FROM ABOUT 1,000* TO ABOUT 1800*F. TO PROVIDE A REDUCED NICKEL BEARING SOURCE.