Recovery of Nickel from Spent Electroless Nickel Plating Baths by Solvent Extraction Using LIX84I.
Recovery of Nickel from Spent Electroless Nickel Plating Baths by Solvent Extraction Using LIX84I.
复制标题
使用 LIX84I 通过溶剂萃取从废化学镀镍浴中回收镍。
DOI：
10.2473/shigentosozai.117.507
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
K. Tatsumi
中科院分区：
文献类型：
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作者：
Mikiya Tanaka;Mikio Kobayashi;M. Alghamdi;K. Tatsumi
为了回收化学镀镍磷合金废液中的镍离子，同时除去铁、锌等杂质，采用实际废液研究了以LIX 84 I为萃取剂的溶剂萃取法的适用性。虽然从废浴中萃取镍的效率明显低于从硫酸镍-硝酸镍溶液中萃取镍的效率，但在pH为6-7时，废浴中的镍被选择性地以高效率（> 99%）萃取。在pH小于3的条件下，萃取的镍被硫酸有效地反萃取。根据这些结果，提出了从废浴中回收镍的流程。废浴的化学平衡计算表明，镍与阴离子如乳酸根和膦酸根离子的络合物在2至6的pH范围内成为主要的。这导致与从硫酸镍-硝酸镍溶液中提取镍相比，从废浴中提取镍的效率降低。通过将这些水相平衡计算与萃取平衡和萃取剂活性组分在有机相中的连续聚集平衡相结合，定量预测了镍的萃取行为。
In order to recover nickel ion in a spent electroless nickel-phosphorus alloy plating bath and, at the same time, to remove impurities such as iron and zinc, the applicability of solvent extraction with LIX84I as the extractant has been investigated using actual spent bath. Although the extraction efficiency of nickel from the spent bath is considerably lower than that from the nickel sulfate-nitrate solution, nickel in the spent bath is selectively extracted with high efficiency (> 99 %) at the pH of 6-7. The extracted nickel is effectively stripped by sulfuric acid at a pH of less than 3. On the basis of these results, a flowsheet for recovering nickel from the spent bath is proposed. Chemical equilibrium calculations of the spent bath have shown that the complexes of nickel with anions such as lactate and phosphonate ions become predominant in the pH range between 2 and 6. This results in the depression of nickel extraction efficiency from the spent bath as compared with that from the nickel sulfate-nitrate solution. By combining these aqueous equilibrium calculations with the extraction equilibrium and the successive aggregation equilibria of the active component of the extractant in the organic phase, the extraction behavior of nickel is quantitatively predicted.