Method for treating nickel-cobalt hydroxide
A technology of nickel-cobalt hydroxide and hydrogen peroxide solution, which is applied in the direction of cobalt sulfate, nickel sulfate, process efficiency improvement, etc., can solve the problems of large content, lower nickel recovery rate, and affect the quality of ternary precursor products, etc. Achieve the effect of reducing COD value and improving removal effect
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Embodiment 1
[0051] Take 100mL of nickel sulfate solution with a pH value of 1.5 as the bottom solution, add 180mL of industrial concentrated sulfuric acid with a mass concentration of 93%, and then put it in a hot water bath at 80°C (for heat preservation, not heating) and stir; add 1100g of nickel Cobalt hydroxide is matured and leached in a high-acid environment, and the reaction time is 1.5 hours to obtain a mature leachate, pH=2.5; then add analytically pure hydrogen peroxide with a mass concentration of 32% for reduction leaching, adjust the pH value, and react for 1.5 hours Dilute with water to obtain a reducing leach solution with pH=5.0; filter to obtain a filter cake containing iron, aluminum, silicon and manganese impurities and a nickel-cobalt sulfate filtrate.
Embodiment 2
[0053] Take 100mL of nickel sulfate solution with a pH value of 1.5 as the bottom solution, add 180mL of industrial concentrated sulfuric acid with a mass concentration of 93%, and then put it in a hot water bath at 80°C (for heat preservation, not heating) and stir; add 1050g of nickel Cobalt hydroxide is matured and leached in a high-acid environment, and the reaction time is 1.5 hours to obtain a mature leachate, pH = 2.3; then add analytically pure hydrogen peroxide with a mass concentration of 32% for reduction leaching, adjust the pH value, and react for 1.5 hours Dilute with water to obtain a reducing leach solution with pH=4.8; filter to obtain a filter cake containing iron, aluminum, silicon and manganese impurities and a nickel-cobalt sulfate filtrate.
Embodiment 3
[0055] Take 100mL of nickel sulfate solution with a pH value of 1.5 as the bottom solution, add 180mL of industrial concentrated sulfuric acid with a mass concentration of 93%, and then put it in a hot water bath at 80°C (for heat preservation, not heating) and stir; add 1150g of nickel Cobalt hydroxide is matured and leached in a high-acid environment, and the reaction time is 1.5 hours to obtain a mature leachate, pH=2.6; then add analytically pure hydrogen peroxide with a mass concentration of 32% for reduction leaching, adjust the pH value, and react for 1.5 hours Dilute with water to obtain a reducing leach solution with pH=4.9; filter to obtain a filter cake containing iron, aluminum, silicon and manganese impurities and a nickel-cobalt sulfate filtrate.
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