SEPARATION OF NIOBIUM AND TANTALUM WITH N-BENZOYL-N-PHENYLHYDROXYLAMINE

Journal Article · Tue Jul 01 04:00:00 EDT 1958 · Analytica Chimica Acta (Netherlands)

DOI:https://doi.org/10.1016/S0003-2670(00)88113-1· OSTI ID:4310680

Majumdar, A K; Mukkherjee, A K

The use of N-benzoyl-N-phenylhydroxylamine for the separation of nioblum and tantalum, allows a satisfactory estimation of niobium from a tartrate solution at an acid-ity of 2.0N. The pH range for complete precipitation can be extended to 6.5. For tantalum precipitation. the pH of the solution should be below 1.5 and the acidity may even be above 2.0N. At pH 3.5 to 6.5, niobium is completely precipitated and tantalum remains in solution; the latter is precipitated by lowering the pH. Niobium and tantalum in ratios of 1:15 to 100:1 can be separated by a single precipitation, in the case of a ratio of 1: 100 precipitation must be carried out twice. Titanium. zirconium, vanadate and molybdate interfere with the determination of niobium though other ions have no effect in the presence of complexone III and tartaric acid. The precipitates are granular and easy to filter and wash. The time taken for a complete analysis is much less than that of other methods. (auth)

• Research Organization: Jadavpur Univ., Calcutta
• NSA Number: NSA-12-016303
• OSTI ID: 4310680
• Journal Information: Analytica Chimica Acta (Netherlands), Journal Name: Analytica Chimica Acta (Netherlands) Vol. Vol: 19; ISSN ACACA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
BENZOYL RADICALS
CHELATES
CHEMISTRY
EDTA
ERRORS
HYDROXYLAMINE
IMPURITIES
MOLYBDENUM OXIDES
NIOBIUM COMPOUNDS
OPERATION
PHENYL RADICALS
PRECIPITATION
QUANTITATIVE ANALYSIS
SEPARATION PROCESSES
SOLUTIONS
TANTALUM COMPOUNDS
TARTARIC ACID
TITANIUM COMPOUNDS
VANADIUM OXIDES
WATER
ZIRCONIUM COMPOUNDS