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METHOD FOR PRODUCING HIGH-PURITY NICKEL SULFATE AND METHOD FOR REMOVING IMPURITY ELEMENT FROM SOLUTION CONTAINING NICKEL
METHOD FOR PRODUCING HIGH-PURITY NICKEL SULFATE AND METHOD FOR REMOVING IMPURITY ELEMENT FROM SOLUTION CONTAINING NICKEL
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机译:高纯硫酸镍的生产方法和从含镍溶液中去除杂质元素的方法
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摘要
Provided are an impurity-element removing method for selectively removing magnesium from a nickel-containing solution, and a method for producing high-purity nickel sulfate using the impurity-element removing method. The production method includes a production process in the production method of producing high-purity nickel sulfate from a nickel-containing solution, and the nickel-containing solution in the production process is subjected to an impurity-element removal treatment that includes: a hydroxylation step of adding an alkali hydroxide to the nickel-containing solution in the production process to form a hydroxylated slurry; a carbonation step of adding an alkali carbonate to the hydroxylated slurry to form a carbonated slurry, and recovering nickel component from the solution; a solid-liquid separation step for the slurry thus obtained; and a neutralization step of subjecting a solution after reaction obtained by solid-liquid separation to a neutralization, and recovering an impurity element included in the nickel-containing solution in the production process.
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