|Series||Report of investigations (United States. Bureau of Mines) -- 7671|
|Contributions||Merrill, C., Couch, D.|
Separation of columbium, tantalum, titanium, and zirconium from titanium chlorination residues /. tantalum, pyrochlore, and baripyrochlore, having a columbium pentoxide-to-tantalum pentoxide ratio of to 1 or greater. 1 Columbite contains slightly larger amounts (up to eight percent) of tantalum. 2 Tantalite is the primary. ANALYTICA CHIMICA ACTA SEPARATION OF NIOBIUM, TANTALUM, TITANIUM AND ZIRCONIUM FROM EACH OTHER A. K. MAJUMDAR AND A. K. MUKHERJEE Department o/ Inorganic and Analytical Chemistry, Jadavpur University, Calcutta (India) (Received February I5th, o) The separation of niobium, tantalum, titanium and zirconium from each other is difficult because their Cited by: 5. This article is cited by 6 publications. E.-M. Horn, A. Kügler.. Materialwissenschaft und Werkstofftechnik , 8 (12), DOI: /mawe
2 RAPP et al. TANTALUM, TITANIUM, AND ZIRCONIUM NEUTRON CROSS-SECTION MEASUREMENTS NUCLEAR SCIENCE AND ENGINEERING VOLUME 0 XXXX m experiments, two Westinghouse WLA and one Amperex BD. Transmission measurements were conducted using the sample-in divided by sample-out method. Data for each. The cleaned titanium-niobium-tantalum oxichloride gas is then cooled to a liquid and distilled to separate out low-boiling titanium chloride gas, whereafter the niobium-tantalum oxichloride gas is further chlorinated to produce NbCl 5 and TaCl 5. These chlorides are fractionally distilled and the niobium chloride subsequently reacted with steam. The extractive separation of niobium(V) and tantalum(V) from the acid media HF-HNO3or HF-H2SO4 have been worked out using methyl isobutyl ketone (MIBK) as an extraction system HF. Tantalum metal is mainly used in the manufacturing of electron components. Its Oxide layer acts as an insulator. Tantalum metal is also used in surgical transplant like replacement of bone, skull plates and as a .
TANTALUM Tantalum (Ta) is a dense, tough and ductile element with very high melting point of ºC. It is also highly corrosion-resistant to most acids below ºC and, in most cases, chemically inert. It has good thermal and electrical conducting properties and is easy to machine . Tantalum has not been placed on the critical raw. Following a critical study of the composition of solvent mixtures which separate niobium, tantalum and titanium by partition chromatography, a solvent mixture has been developed which gives ideal R f values for these elements. Its composition is M hydrofluoric acid-2M nitric acid-diethyl ketone. Separation is complete in about 30 min. At nearly the same time as tantalum’s discovery in , Hatchett identified niobium in the form of its oxide. He named the element “columbium” after the place in North America where it was found. Niobium was later mistaken for tantalum, until Rose isolated the pure chloride and named the element on which it was based niobium. Columbium and tantalum salts are reduced to metal by a number of methods, including: sodium reduction, aluminothermic reduction, carbon reduction, and electrolysis. Sodium reduction (not shown) is a popular method for producing both columbium and tantalum from their salts. In this process, sodium reduces the columbium or tantalum to metal.