자원리싸이클링 (Resources Recycling)

  • 제18권1호
  • /
  • Pages.30-37
  • /
  • 2009
  • /
  • 2765-3439(pISSN)
  • /
  • 2765-3447(eISSN)
한국자원리싸이클링학회 (The Korean Institute of Resources Recycling)
권호 표지

염산용액(鹽酸溶液)에서 白金(IV), 팔라듐(II)과 로듐(III)의 이온평형(平衡)

Ionic Equilibria of Pt(IV), Pd(II) and Rh(III) in Hydrochloric Acid Solution

  • 이만승 (목포대학교 공과대학 신소재공학과) ;
  • 이진영 (한국지질자원연구원 광물자원연구본부)
  • Lee, Man-Seung (Department of Advanced Materials Science & Engineering, Mokpo National University) ;
  • Lee, Jin-Young (Mineral Resources Research Division, Korea Institute of Geoscience and Mineral Resources)
  • 발행 : 2009.02.27
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

염산농도 0.001에서 10 M사이의 범위에서 백금(IV)과 팔라듐(II) 및 로듐(III)의 착물형성반응과 물질수지를 고려하여 각 금속의 분배곡선을 구했다. 염산농도가 0.1 M이상인 조건에서는 백금과 팔라듐의 대부분은 $PtCl_6^{2-}$와 $PdCl_2^{2-}$로 존재하였다. 로듐의 농도분포는 염산농도에 큰 영향을 받는다. 염산농도가 0.1에서 10 M로 증가함에 따라 로듐의 주 화학종이 $PhCl_5^{2-}$에서 $PhCl_6^{3-}$로 변했다. 문헌에 발표된 백금과 팔라듐의 용매추출자료로부터 $PtCl_6^{2-}$ 및 $PtCl_4^{2-}$와 수소이온간의 매개변수를 추산했다.

Distribution diagram of Pt(IV), Pd(II), and Rh(III) in HCl solution was obtained as a function of HCl concentration from 0.001 to 10 M by considering complex formation reaction together with mass balance. When HCl concentration was higher than 0.1 M, most of Pt and Pd in HCl solution exist as $PtCl_6^{2-}$ and $PtCl_4^{2-}$. The concentration of HCl had a feat effect on the speciation of Rh(III). As HCl concentration increases from 0.1 to 10 M, the pedominant species changes from $PhCl_5^{2-}$ to $PhCl_6^{3-}$. Interaction parameters of $PtCl_6^{2-}$ and $PdCl_4^{2-}$ with hydrogen ion were evaluated from the solvent extraction data of Pt and Pd reported in the literature.

키워드

참고문헌

  1. Bemardis, F. L., Grant, R. A., and Sherrington, D. C., 2005 : A review of methods of separation of the platinum group metals through ther chloro-complexes. Reactive & functional polymers, 65, pp. 205-217 https://doi.org/10.1016/j.reactfunctpolym.2005.05.011
  2. Lokhande, T. N., Anuse, M. A, and Chavan, M. B., 1998: Extraction and separation studies of platinurn(IV) with Nn-octylaniline. Talanta, 46, pp. 823-832
  3. Yoshizawa, H. et al., 1997 : Solvent extraction of platinum (IV) from aqueous acidic chloride media with tri-noctylamine in toluene. Solvent Extraction Research and Development, 4, pp. 157-166
  4. Alguacil, F. J. et al., 1997 : Extraction of platinum(IV) from hydrochloric acid solutions by amine alamine 304 in xylene. Estimation of the interaction coefficient between $PtCI_{6}^{2-}$ and $H^+$. Hydrometallurgy, 44, pp. 203-212 https://doi.org/10.1016/S0304-386X(96)00047-3
  5. 김진현, 이원해, 1995 : 염산용액에서 TBP에 의한 백금의 용매추출. 대한금속학회지, 33, pp. 1382-1386
  6. Foulon, C., Pareau, D., and Durand, G, 1999: Thermodynamic and kinetic studies of pal1adium(II) extraction by extractant mixtures containing LIX63 Part I. Thermodynamic study. Hydrometallurgy, 51, pp. 139-153 https://doi.org/10.1016/S0304-386X(98)00053-X
  7. Lokhande, T. N., Anuse, M. A, and Chavan, M. B., 1998: Liquid-liquid extraction of palladiurn(Il) with N-n-octylaniline from hydrochloric acid media. Talanta, 47, pp. 163-169
  8. Levitin, G and Schmuckler, G, 2003 : Solvent extraction of rhodium chloride from aqueous solutions and its separation from palladium and platinum. Reactive & functional polymers, 54, pp. 149-154 https://doi.org/10.1016/S1381-5148(02)00190-6
  9. Kolekar, S. S. and Anuse, M. A, 2002: Solvent extraction separation of rhodium(III) with N-n-octylaniline as an extractant. Talanta, 58, pp. 761-771 https://doi.org/10.1016/S0039-9140(02)00365-X
  10. Beguerel, E., Demopoulos, G P., and Harris, G B., 1996:Speciation and separation of rhodium(II1) from chloride solutions: a critical review. Hydrometallurgy, 40, pp. 135-152 https://doi.org/10.1016/0304-386X(94)00086-I
  11. Ashrafizadeh, S. N. and Demopoulos, G P., 1995: Formation of W /O microemulsions in the extraction system Rh(IIl)HCl- Kelex 100 and its impact on Rh(III) distribution. J. of colloid and interface science, 173, pp. 448-459 https://doi.org/10.1006/jcis.1995.1346
  12. Shen, Y. F. and Xue, W. Y., 2007 : Recovery palladium, gold and platinum from hydrochloric acid solution using 2- hydroxy-4-sec-octanoyl diphenyl-ketoxime. Separation and purification technology, 56, pp. 278-283 https://doi.org/10.1016/j.seppur.2007.02.001
  13. Rane, M. V. and Venugopal, V., 2006: Study on the extraction of palladium(II) and platinum(IV) using LIX 841. Hydrometallurgy, 84, pp. 54-59 https://doi.org/10.1016/j.hydromet.2006.04.005
  14. Mhaske, A A and Dhadke, P. M., 2001: Extraction separation studies of Rh, Pt and Pd using Cyanex 921 in toluene-a possible application to recovery from spent catalysts. Hydrometallurgy, 61, pp. 143-150 https://doi.org/10.1016/S0304-386X(01)00152-9
  15. Bandekar, S. V. and Dhadke, P. M., 1998: Solvent extraction separation of platinum(IV) and palladium(II) by 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester (PC-88A). Separation and purification technology, 13, pp. 129-135 https://doi.org/10.1016/S1383-5866(97)00068-3
  16. Smith, R. M. and Martell, A. E., 1982: Critical stability constants Vol. 4 Inorganic complexes, p. 107, Plenum Press, NY
  17. Bromley, L. A, 1973 : Thermodynamic properties of strong electrolytes in aqueous solutions. AIChE Journal, 19, pp. 313-320 https://doi.org/10.1002/aic.690190216