• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Separation and Purification Technology >Transfer of cobalt and nickel from sulphate solutions to spent electrolyte through solvent extraction and stripping
【24h】

Transfer of cobalt and nickel from sulphate solutions to spent electrolyte through solvent extraction and stripping

机译：通过溶剂萃取和汽提将钴和镍从硫酸盐溶液转移到废电解质中

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We report in this paper studies carried out on the separation and recovery of cobalt and nickel from sulphate solutions through solvent extraction using acid form of PC 88A and D2EHPA diluted in kerosene and stripping of metals from loaded organic phase with synthetic spent electrolyte solutions to generate respective pregnant electrolyte solutions.The typical composition of sulphate solution used for the present study contains Co:1.91 g/L and Ni:14.83 g/L.Variation of aqueous phase equilibrium pH in the range from about 3.1 to 6.5 using 0.15,0.2 and 0.25 M PC 88A indicated increase of cobalt extraction and reaches maximum (approx 92-95%) around 5.5 pH with co-extraction of nickel from 0.1 to 5.7%.Comparison of cobalt extraction behavior with the three extractant concentrations showed 0.2 M PC 88 A as the best with highest separation factor of about 730 and about 3% co-extraction of nickel only.Using 0.2 M extractant concentration,almost quantitative extraction of cobalt in two counter-current (CC) stages at an aqueous to organic (A:O) phase ratio of 1.5:1 and stripping of metal from loaded organic (LO) in two CC stages at A/O ratio of 1.7 with synthetic spent electrolyte (SE) solution was achieved,generating a pregnant electrolyte solution of pH around 3 suitable for electrowinning.Similar optimum conditions for the treatment of cobalt raffinate to recover nickel using 0.7 M D2EHPA (pH 6.6,unit phase ratio,two stages) and stripping of metal from LO (O/A:1.7,two stages) with synthetic nickel SE solution were established.Finally,complete process flowsheet for the separation and recovery of cobalt and nickel is demonstrated.
机译：我们在本文中报告了以下研究：通过溶剂萃取（使用煤油中稀释的PC 88A和D2EHPA酸的酸形式）从硫酸盐溶液中分离和回收钴和镍，并使用合成的废电解质溶液从负载的有机相中汽提金属以生成相应的怀孕的电解质溶液。本研究中使用的硫酸盐溶液的典型组成为Co：1.91 g / L和Ni：14.83 g / L。水相平衡pH值在0.15、0.2和0.25的范围从3.1到6.5范围内变化M PC 88A表示钴提取量增加，在5.5 pH左右达到最大值（约92-95％），镍从0.1到5.7％的共提取。三种萃取剂浓度下钴提取行为的比较显示0.2 M PC 88 A为最好的分离因子最高，约为730，仅镍的共萃取率约为3％。使用0.2 M的萃取剂浓度，几乎可以在两个计数器中定量萃取钴-电流（CC）阶段，水与有机（A：O）的比率为1.5：1，并在两个CC阶段以A / O比率为1.7用合成废电解质（SE）从负载的有机（LO）中剥离金属溶液达到了pH大约为3的适合母液的电解溶液。使用0.7 M D2EHPA（pH 6.6，单位相比，两阶段）处理萃余酸钴以回收镍的最佳条件相似，并从LO中去除金属建立了合成镍SE溶液（O / A：1.7，分两个阶段）。最后，证明了分离和回收钴和镍的完整工艺流程。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号