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| Preparation and Property of Zinc Diammine Chloride |
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Received:November 10, 2010
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| DOI：DOI：10.3969/j.issn.1007-7545.2011.08.014 |
| KeyWord:Ammonium chloride；Leaching；Secondary zinc oxide；Zinc diammine chloride |
| Author | Institution |
| TANG Yu-zhong |
广西大学 |
| CHEN Zhi-chuan |
深圳市危险废物处理站有限公司 |
| XIAO Zuo-ping |
深圳市危险废物处理站有限公司 |
| TONG Zhang-fa |
广西大学 |
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| Abstract: |
| Zn(NH3)2Cl2 was prepared by the process of leaching secondary zinc oxide with ammonium chloride solution, deironization, deep impurity-removing and crystallization. The results showed that the zinc leaching rate was more than 99% under the conditions that the concentration of NH4Cl solution was 4 mol/L, the molar ratio (NH4Cl/Zn)was 4:1, the leaching temperature was 70 ℃, and the leaching time was 60 min. The impurities could be completely removed by 27.5% hydrogen peroxide solution oxidizing Fe and zinc powder displacement process. The prepared Zn(NH3)2Cl2 was characterized by chemical analysis, XRD, SEM and TG-DSC. The results showed Zn(NH3)2Cl2 was pure in integral crystalline form. |
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