نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه فرآوری مواد معدنی، بخش مهندسی معدن، دانشکده فنی و مهندسی، دانشگاه تربیت مدرس، صندوق پستی: 143-14115، تهران - ایران
2 پژوهشکده چرخه سوخت هستهای، پژوهشگاه علوم و فنون هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران ـ ایران
کلیدواژهها
عنوان مقاله English
نویسندگان English
Extraction of ytterbium from anomaly No.5 of Saghand leach solution using D2EHPA as extractant, kerosene as a diluent, and optimization of the effective parameters were investigated. In addition to uranium and thorium, rare earths elements also exist in Saghand ore. The effect of pH on the extraction of Yb and other existing elements shows that their extractions increase by increasing pH. The extraction of Yb, U, La, Y, Ce and Fe in pH=2 were 99.9, 83, 13.5, 99.8, 8.5 and 27.4%, respectively. The increasing of the A/O ratio decreases the extraction of other elements more than Yb where it resulted in the increasing of the Yb separation. The theoretical number of extraction stages were determined in pH=2 and A/O=9 using McCabe-Thiele diagram. Stripping of the organic phase was also carried out by different concentrations of nitric acid.
کلیدواژهها English
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12. G.W. Mason, “Process for separation of the rare earths by solvent extraction,” U.S Patent, No. 4016237 (1975).