RECOVERY OF LANTHANIDES AND YTTRIUM FROM SINGLE SUPER PHOSPHATE FERTILIZER USING D2EHPA AND A SYNERGISTIC D2EHPA-TBP MIXTURE

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MILANI S.A.; NAZEMI S.H.; REZAEI B.

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Journal: JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY Year:2015 | Volume:- | Issue:73 Page(s): 69-107

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Title

RECOVERY OF LANTHANIDES AND YTTRIUM FROM SINGLE SUPER PHOSPHATE FERTILIZER USING D2EHPA AND A SYNERGISTIC D2EHPA-TBP MIXTURE

Author(s)

MILANI S.A. | NAZEMI S.H. | REZAEI B. | Issue Writer Certificate

Keywords

LANTHANIDS

YTTRIUM

SINGLE SUPER PHOSPHATE FERTILIZER

SOLVENT EXTRACTION

SYNERGISM

Abstract

The recovery of lanthanides (lanthanum, cerium, erbium, and europium) and YTTRIUM from nitrate leach liquor of SINGLE SUPER PHOSPHATE FERTILIZER was investigated using di-(2-ethylhexyl) phosphoric acid (D2EHPA). After the preliminary crushing in specified dimensions, first, nitric acid leaching was accomplished using 60% (13.28 mol L-1) nitric acid at 65oC, which resulted in the recovery of 91% for lanthanides and YTTRIUM. The precipitation process from the leach liquor removed about 75% of interfering ions. Then, the raffinate and synthetic nitrate solutions were submitted to the extraction process. The main parameters of the extraction process were the extractant concentration, HNO3 concentration, temperature, contact time, and Vorg./Vaq.. After determination of the optimum condition of the extraction of lanthanides and YTTRIUM, the extraction was performed using leach liquor solution, which resulted in the recovery of 97.65%, 97.82%, 98.12%, 95.82%, and 96.34% for La, Ce, Y, Er, and Er, respectively. Selective strippings of lanthanides and YTTRIUM from the loaded organic phase were studied using nitric acid. The main variable for stripping process were the stripping agent concentration and the contact time between the loaded organic and aqueous phases. Under the determined optimum conditions, a one step stripping of the loaded organic phase, stripped 97.12%, 96.48%, 97.25%, 98.31%, and 97.12% of La, Ce, Y, Er, and Eu, respectively. The synergistic D2EHPA-TBP mixture increased the extraction efficiency by 3%.

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APA: Copy

MILANI, S.A., NAZEMI, S.H., & REZAEI, B.. (2015). RECOVERY OF LANTHANIDES AND YTTRIUM FROM SINGLE SUPER PHOSPHATE FERTILIZER USING D₂EHPA AND A SYNERGISTIC D₂EHPA-TBP MIXTURE. JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY, -(73), 69-107. SID. https://sid.ir/paper/689508/en

Vancouver: Copy

MILANI S.A., NAZEMI S.H., REZAEI B.. RECOVERY OF LANTHANIDES AND YTTRIUM FROM SINGLE SUPER PHOSPHATE FERTILIZER USING D₂EHPA AND A SYNERGISTIC D₂EHPA-TBP MIXTURE. JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY[Internet]. 2015;-(73):69-107. Available from: https://sid.ir/paper/689508/en

IEEE: Copy

S.A. MILANI, S.H. NAZEMI, and B. REZAEI, “RECOVERY OF LANTHANIDES AND YTTRIUM FROM SINGLE SUPER PHOSPHATE FERTILIZER USING D₂EHPA AND A SYNERGISTIC D₂EHPA-TBP MIXTURE,” JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY, vol. -, no. 73, pp. 69–107, 2015, [Online]. Available: https://sid.ir/paper/689508/en

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