Zinc-nickel separation
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This post was last edited by rgs8028 on 2012-3-12 at 11:04. I would like to ask fellow experts how zinc and nickel can be separated in a zinc sulfate system (with about 5% zinc and 0.12% nickel). **What is the effectiveness of boron oxide in removing nickel? I appreciate any advice from those who know more
Extraction and separation using P204 00000000000
It’s better to use extraction separation: first extract zinc with P204, and then nickel with P507.
Extraction was carried out three times using 30% P204 + 70% kerosene at a pH of 2.7–3, and two major problems were identified: 1. The extraction efficiency of zinc was low； 2. The zinc oxide color is darker after zinc precipitation and calcination.
During the extraction process, the pH should not be too low; it’s best to keep it around 5.0. If a thorough extraction is desired, some saponification may be necessary. In the end, the pH should be controlled at around 1.8. Through three stages of extraction, over 99% of the zinc can be extracted. This topic cannot be explained in just a few words; for more details, please contact me via QQ at 402872261