Extraction of Precious Metals with a New Amide Extractant

Extraction of Precious Metals with a New Amide Extractant
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使用新型酰胺萃取剂萃取贵金属

DOI:
10.4028/www.scientific.net/amr.878.399
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发表时间:
2014-01
期刊:
Advanced Materials Research
影响因子:
--
通讯作者:
Lin Zhu
Lin Zhu
中科院分区:
其他
文献类型:
--
作者:
Ying Huang;Nan Li;Yonghua Li;Jian Wu;Shanghua Li;Sheng Chen;Lin Zhu

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贵金属具有优良的耐热性、耐腐蚀性和催化性能,在电子工业中得到了广泛的应用。因此,从电子废物中回收贵金属非常重要。本研究首次通过N-烷基化和N-酰化反应合成了一种新型酰胺类萃取剂N,N-二甲基-N,N-二癸基-3-硫代戊二酰胺(MDTDGA)。研究了MDTDGA在80%十二烷-20%2-乙基己醇介质中从盐酸介质中萃取贵金属的行为。萃取率随HCl浓度和萃取剂浓度的增加而增加,但不受H+浓度的影响。结果表明,MDTDGA对贵金属Pd(II)、Pt(IV)、Au(III)的萃取为中性配位。用MDTDGA对Au(III)的萃取率高达99.5%。
Precious metals are used widely in electronic industry because of their excellent heat resistance, corrosion resistance and catalytic property. Therefore it is important to recycle precious metals from E-waste. In this study, a new amid extractant N,N-Dimethyl-N,N-didecyl-3-thiopentanediamide (MDTDGA) was firstly synthesized through N-alkylated and N-acylation reaction. The extraction behavior of precious metals with MDTDGA in 80% dodecane-20% 2-ethylhexanol from hydrochloric acid was studied. The extraction ration increases with HCl concentration and extractant concentration, but it is not influenced by H+ concentration. It is indicated that the extraction of precious metals Pd (II), Pt (IV), Au (III) with MDTDGA is neutral coordination. High extraction efficiency of Au (III) of 99.5% using MDTDGA was obtained.
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