NickelNickel (Ni) and cobaltCobalt (Co) are essential elements for the productionProductions of lithiumLithium-ion batteriesBattery (LIBsLithium Ion Batteries (LIB)). With the increasing demandDemand for these batteriesBattery, the need for high-purity Ni and Co has surged. This paper presents a robust process for the selective recovery of Ni and Co from a chloride leachingLeaching solution containing Ni (0.29%), Co (0.33%), Cu (0.66%), and other metalMetals impurities. CopperCopper was effectively removed by selective precipitationPrecipitation at 94% through pH adjustment, ensuring minimal interference in the subsequent extractionExtraction steps. Impurities such as Fe, Zn, Ca, and Pb were extracted using D2EPHA, while minimizing the co-extractionExtraction of Ni and Co. The optimal extractionExtraction conditions were identified at a 1/2 organic-to-aqueous ratio, with extractionExtraction efficiencies of 75.35% for Fe, 78.74% for Zn, 98.54% for Ca, and 30.8% for Pb. Co was efficiently extracted using CYANEX 272 at 68.54% in a single stage with a co-extractionExtraction of 18.7 ppm for Mg. For Ni, a high selectivity was achieved at 96.26% using 15% v/v of VERSATIC 10 in 85% v/v of kerosene with co-extractionExtraction of 19 ppm for Mg. Subsequent stripping with 2 M sulfuric acidAcid resulted in a Co recovery of 64.55% and a Ni recovery of 51.59% at a 1/4 organic-to-aqueous ratio for both. These results, achieved in a single-stageSolvent Extraction (SX), can be further optimized by incorporating additional extractionExtraction and stripping stages and conducting tests at higher temperatures.

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Selective Extraction of Nickel and Cobalt from Chloride Solutions for Battery Cathode Production

  • Meriem Merah,
  • Bridget Afua-Afrah Bonfu,
  • Lana Alagha

摘要

NickelNickel (Ni) and cobaltCobalt (Co) are essential elements for the productionProductions of lithiumLithium-ion batteriesBattery (LIBsLithium Ion Batteries (LIB)). With the increasing demandDemand for these batteriesBattery, the need for high-purity Ni and Co has surged. This paper presents a robust process for the selective recovery of Ni and Co from a chloride leachingLeaching solution containing Ni (0.29%), Co (0.33%), Cu (0.66%), and other metalMetals impurities. CopperCopper was effectively removed by selective precipitationPrecipitation at 94% through pH adjustment, ensuring minimal interference in the subsequent extractionExtraction steps. Impurities such as Fe, Zn, Ca, and Pb were extracted using D2EPHA, while minimizing the co-extractionExtraction of Ni and Co. The optimal extractionExtraction conditions were identified at a 1/2 organic-to-aqueous ratio, with extractionExtraction efficiencies of 75.35% for Fe, 78.74% for Zn, 98.54% for Ca, and 30.8% for Pb. Co was efficiently extracted using CYANEX 272 at 68.54% in a single stage with a co-extractionExtraction of 18.7 ppm for Mg. For Ni, a high selectivity was achieved at 96.26% using 15% v/v of VERSATIC 10 in 85% v/v of kerosene with co-extractionExtraction of 19 ppm for Mg. Subsequent stripping with 2 M sulfuric acidAcid resulted in a Co recovery of 64.55% and a Ni recovery of 51.59% at a 1/4 organic-to-aqueous ratio for both. These results, achieved in a single-stageSolvent Extraction (SX), can be further optimized by incorporating additional extractionExtraction and stripping stages and conducting tests at higher temperatures.