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Chem. J. Chinese Universities ›› 1980, Vol. 1 ›› Issue (2): 23.

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ACTION OF 1-PHENYL-3-METHYL -4-BENZOYL-PYRAZOLONE-5WITH THORIUM AND RARE-EARTHS-Ⅲ--STUDIES ON THE EXTRACTION OF RARE-EARTHS AND THE COMPOSITION AND PROPERTY OF SOLID COMPLEX COMPOUNDS

Liu Jianmin, Yang Rudong, Ma Tairu   

  1. Department of Chemistry, Lanzhou University
  • Received:1980-01-18 Online:1980-12-24 Published:1980-12-24

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Abstract: In this paper we have studied the action of Ln(NO)3(Ln=La,Ce,Eu,Yb,and Lu) with PMBP-CHCL3.It was found that when the concentration of PMBP≥0.2M the distribution ratio is in inverse proportion to the third power of the concentration of hydrogen ions and in direct proportion to the fourth power of the concentration of PMBP,all the rare-earth ions are extracted into organic phase in the form of LnA3·HA,their extraction equilibrium constants(lgK) equal to La(-6.20),Ce(-4.30),Eu(-3.62),Yb(-2.90) and Lu(-3.20),respectively.Under the condition of extraction,all the rare-earth solid complexes (except pm) are obtained from organic phase,their composition is LnA3HA (LuA3for Lu) their crystals,infrared spectra and thermalgraph are also studied.In this paper we have studied the action of Ln(NO)3(Ln=La,Ce,Eu,Yb,and Lu) with PMBP-CHCL3.It was found that when the concentration of PMBP≥0.2M the distribution ratio is in inverse proportion to the third power of the concentration of hydrogen ions and in direct proportion to the fourth power of the concentration of PMBP,all the rare-earth ions are extracted into organic phase in the form of LnA3·HA,their extraction equilibrium constants(lgK) equal to La(-6.20),Ce(-4.30),Eu(-3.62),Yb(-2.90) and Lu(-3.20),respectively.Under the condition of extraction,all the rare-earth solid complexes (except pm) are obtained from organic phase,their composition is LnA3HA (LuA3for Lu) their crystals,infrared spectra and thermalgraph are also studied.

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