کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6672233 | 1427587 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Solvent extraction of yttrium and rare earth elements from copper pregnant leach solutions using Primene JM-T
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The solvent extraction of yttrium and rare earth elements from copper pregnant leach solutions (PLS) using Primene JM-T, a primary aliphatic amine, has been studied. This investigation focused on the effect of extractant concentration to obtain a better understanding of the extraction mechanism. Copper bearing PLS from a leaching operation in Arizona was used as the feed solution in all experiments. Standard experimental conditions were 5â¯min contact time, 1:1 O:A phase ratio, kerosene as a diluent, and room temperature. The solution chemistry of the PLS was modeled using PHREEQC software. Primene JM-T concentrations in the organic phase ranged from 0.059-0.221â¯M (2-7.5% v/v). At 0.147â¯M Primene JM-T, yttrium extraction was 88.4% whereas the LREEs averaged about 95% and the HREEs a little lower at 92%. It was shown that approximately 2.4â¯mol of Primene JM-T are required per mole of yttrium or rare earth metal at extractant concentrations ranging from 0.07 to 0.10â¯M. In this Primene JM-T concentration range, it appears that a mixture of metal sulfate complexes is being extracted. At low Primene JM-T concentrations, Me(SO4)33- is the dominant species being extracted. As extractant concentrations increases, the reaction appears to favor of the extraction of Me(SO4)2â.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Minerals Engineering - Volume 125, 15 August 2018, Pages 265-270
Journal: Minerals Engineering - Volume 125, 15 August 2018, Pages 265-270
نویسندگان
J. Brent Hiskey, Rebecca Grace Copp,