Extraction and Separation of Niobium(V) With 3-Hydroxy-2-Methyl-1-Phenyl-4-Pyridone

Extraction and Separation of Niobium(V) With 3-Hydroxy-2-Methyl-1-Phenyl-4-Pyridone

Niobium(V) in hydrochloric and sulphuric acid media in the presence of an excess of chloride or thiocyanate ions reacts with 3-hydroxy-2-methyl-1-phenyl-4-pyridone (HX) to give complexes which are extractable into chloroform. The experimental conditions for the quantitative extraction of Nb and its...

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Veröffentlicht in:Solvent extraction and ion exchange 1987-01, Vol.5 (5), p.909-922
Hauptverfasser: Tamhina, B, Ivsic, A G
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Ivsic, A G
description Niobium(V) in hydrochloric and sulphuric acid media in the presence of an excess of chloride or thiocyanate ions reacts with 3-hydroxy-2-methyl-1-phenyl-4-pyridone (HX) to give complexes which are extractable into chloroform. The experimental conditions for the quantitative extraction of Nb and its subsequent spectrophotometric determination in the organic phase are described. The mechanism of extraction is based on the formation of a mixed Nb(OH) sub 3 ClX or Nb(OH) sub 3 (NCS)X complex. The extraction with HX permits separating Nb(V) from Zr(IV) and Hf(IV). 8 ref.--AA
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The experimental conditions for the quantitative extraction of Nb and its subsequent spectrophotometric determination in the organic phase are described. The mechanism of extraction is based on the formation of a mixed Nb(OH) sub 3 ClX or Nb(OH) sub 3 (NCS)X complex. 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title Extraction and Separation of Niobium(V) With 3-Hydroxy-2-Methyl-1-Phenyl-4-Pyridone
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