کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6659090 | 1425529 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Selection of a synergistic solvent extraction system to remove calcium and magnesium from concentrated nickel sulfate solutions
ترجمه فارسی عنوان
انتخاب یک سیستم استخراج حلال سینرژیک برای حذف کلسیم و منیزیم از محلول های سولفات نیکل متمرکز
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کلمات کلیدی
همکاری استخراج حلال، نیکل، کلسیم، منیزیم،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
Synergistic solvent extraction of Ca and Mg from concentrated Ni sulfuric solutions was assessed using extractants Cyanex 272, D2EHPA, and naphthenic acid. D2EHPA has a strong preference for extracting Ca; however, Ca was crowded out by Ni at pHÂ >Â 3.5. Cyanex 272 has a higher affinity for Mg at pHÂ >Â 5, while both earth alkaline metals are rejected by naphthenic acid at pHÂ =Â 2-6 as well as by the system Cyanex 272Â +Â naphthenic acid. The system D2EHPAÂ +Â naphthenic acid has affinity only for Ca. The system D2EHPAÂ +Â Cyanex 272 can extract Ca and Mg simultaneously; however, selectivities Ca/Ni and Mg/Ni are dependent on the liquor pH and D2EHPA concentration in organic mixture solution. In this system, a strong synergistic effect was found for Ca and Mg, whereas contradictory behavior was observed for Ni. To avoid crud formation, the selective extraction of Ca and Mg should be performed at pHÂ <Â 6. Ni can be selectively stripped from the loaded D2EHPAÂ +Â Cyanex 272 using diluted H2SO4 solution, whereas Ca and Mg can be completely stripped with concentrated H2SO4 solution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hydrometallurgy - Volume 175, January 2018, Pages 250-256
Journal: Hydrometallurgy - Volume 175, January 2018, Pages 250-256
نویسندگان
Alexandre Silva Guimarães, Marcelo Borges Mansur,