폐 영구자석으로부터 회수한 염화희토류용액에서PC88A를 이용한 경희토류(Pr, Nd)/중희토류(Tb, Dy) 용매추출
Solvent Extraction of Light (Pr, Nd) and Medium (Tb, Dy) Rare Earth Elements with PC88A of Rare Earth Chloride Solution from Waste Permanent Magnet
1
조회
0
다운로드
5
인용
0
참고문헌
키워드
초록
Nd-Fe-B 폐 영구자석으로부터 회수한 염화희토류용액을 PC88A에 의한 경희토류(Pr, Nd)/중희토류(Tb, Dy) 분리정제에 대한 용매추출 연구를 진행하였다. 회분식 실험 단계에서 추출제(PC88A) 농도 0.5 M, 추출 후 평형 pH는 0.8~1.0(feed의 초기 pH 1.3), 세정액(HCl)의 농도는 0.1 M, 탈거액(HCl)의 농도는 2 M 이상일 때 분리 효율이 좋은 것을 확인하였다. 이 결과값을 혼합침강조에 적용하여 초기 조건에서 운용 조건을 변화시키면서 180시간 운용하여 3N급의 경희토류(Pr, Nd)/중희토류(Tb, Dy)금속 이온으로분리정제 후 회수하였다.
Abstract
Solvent extraction behavior of light rare earth elements (Pr, Nd) and medium rare erath elements (Tb, Dy) in the HCl-PC88Akerosene extraction system was investigated in order to separate high-purity light rare earths (Pr, Nd) and medium rare earths (Tb, Dy) in the mixed rare earth chloride solution. In the batch test step, it was confirmed that the separation efficiency was good when the extractant concentration (PC88A) was 0.5 M, the equilibrium pH after extraction was 0.8 to 1.0 (initial pH 1.3 of the feed), the concentrations of hydrochloric acid in scrubbing solution was set as 0.1 M, the concentrations of hydrochloric acid in stripping solution was set as 2.0 M or more. Based on the experimental data obtained from the batch test, the mixer-settler was composed as follows; 4 stages of extraction, 8 stages of scrubbing, 4 stages of stripping, and 3 stages of pickling organic solution. The Mixer-settler was operated for 180 hours, and the operating conditions were continuously adjusted to obtain the high-purity light/medium rare earths. Finally, the purity of light (Pr, Nd) and medium rare earth elements (Tb, Dy) was reached as 3 N class.
참고문헌 (16)
- 이광섭, "鹽酸溶液에서 PC88A에 의한 Nd의 溶媒抽出", 자원리싸이클링, 13(4), pp.39~45 (2004), 한국자원리싸이클링학회
- 박주호, "鹽酸溶液에서 PC88A와 D2EHPA에 의한 Nd와 Pr의 分離抽出", 자원리싸이클링, 22(5), pp.35~42 (2013), 한국자원리싸이클링학회[DOI]
- N. V. Thakur et al., "Separation of neodymium from lighter rare earths using alkyl phosphonic acid, PC88A", Hydrometallurgy, 34, pp.99~108 (1993)[DOI]
- Gupta, C. K., "Extractive metallurgy of rare earths" (2005), CRC press
- Raju Banda, "Solvent extraction separation of La from chloride solution containing Pr and Nd with Cyanex272", Hydrometallurgy, 121-124, pp.74~80 (2012)[DOI]
- Abdeltawab, A. A., "Separation of La and Ce with PC-88A by counter-current mixer-settler extraction column", Separation and Purification Technology, 26(2), pp.265~272 (2002)[DOI]
- Wang, D. J., "Mechanism of the extractant loss in lanthanide extraction process with saponified organophosphorus acid extraction systems- II: Formation of aqueous aggregates", Solvent extraction and ion exchange, 14(4), pp.585~601 (1996)[DOI]
- 이만승, "鹽酸溶液에서 PC88A와 비누화 PC88A에 의한 Nd와 Sm의 分離抽出", 자원리싸이클링, 14(2), pp.33~42 (2005), 한국자원리싸이클링학회
- 조연철, "경희토류(La, Ce, Pr, Nd, Sm) 혼합용액에서 Cyanex 572에 의한 추출ㆍ분리 거동 고찰", 자원리싸이클링, 26(4), pp.79~87 (2017), 한국자원리싸이클링학회[DOI]
- Devi, N. B., "Sepamtion and recovery of cobalt(II) and nickel(II) from sulphate solutions using sodium salts of D2EHPA, PC88A and Cyanex 272", Hydrometallurgy, 49(1), pp.47~61 (1998)[DOI]
- Sarangi, K., "Extraction studies of cobalt (II) and nickel (II) from chloride solutions using Na-Cyanex 272.: Separation of Co(II)", Ni(II) by the sodium salts of D2EHPA, PC88A and Cyane:x 272 and their mixtures, 1999, pp.52(3), 253~265
- Devi, N. B., "Separation of divalent manganese and cobalt ions from sulphate solutions using sodium salts of D2EHPA, PC 88A and Cyanex 272", Hydrometallurgy, 54(2), pp.117~131 (2000)[DOI]
- 박주호, "모나자이트 샌드의 염산침출용액으로부터 용매추출에 의한 Nd와 Pr의 분리", 자원리싸이클링, 23(1), pp.17~24 (2014), 한국자원리싸이클링학회[DOI]
- 이진영, "鹽酸溶液에서 PC88A와 비누화 PC88A에 의한 Gd와 Nd의 分離抽出", 자원리싸이클링, 17(1), pp.12~19 (2008), 한국자원리싸이클링학회
- 반다라쥬, "Separation of Nd from mixed chloride solutions with Pr by extraction with saponified PC 88A and scrubbing", Journal of Industrial and Engineering Chemistry, 21(1), pp.436~442 (2015), 한국공업화학회[DOI]
- 안낙균, "저농도 희토류 용액으로부터 PC88A를 이용한 중희토류의 용매추출 연구", 자원리싸이클링, 26(4), pp.26~33 (2017), 한국자원리싸이클링학회[DOI]