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[PDF] Top 20 Separation of niobium and tantalum by liquid extraction

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Separation of niobium and tantalum by liquid extraction

Separation of niobium and tantalum by liquid extraction

... of niobium and tantalum by liquid extraction Abstract Niobium, also known as columbium, is one of the new industrial metals likely to play an important role in industrial processing in ... See full document

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Application of liquid liquid extraction to the separation of tantalum from niobium

Application of liquid liquid extraction to the separation of tantalum from niobium

... of liquid-liquid extraction to the separation of tantalum from niobium Abstract The use of liquid-liquid extraction for the separation of ... See full document

78

Separation of niobium and tantalum   a literature survey

Separation of niobium and tantalum a literature survey

... of niobium and tantalum - a literature survey Abstract During recent years increased interest has been shown in the metal ...Because niobium has a high melting point (4376° F) and a low neutron ... See full document

16

A Review of Niobium Tantalum Separation in Hydrometallurgy

A Review of Niobium Tantalum Separation in Hydrometallurgy

... ABSTRACT Niobium and tantalum are chemically similar and are associated with each other in nature which makes it very difficult to ...the separation of tantalum from niobium involved ... See full document

12

Caustic fusion of columbite tantalite concentrates with subsequent separation of niobium and tantalum

Caustic fusion of columbite tantalite concentrates with subsequent separation of niobium and tantalum

... subsequent separation of niobium and tantalum Abstract A procedure for the production of spectrographically pure niobium and tantalum oxides from columbite- tantalite concentrates was ... See full document

31

Tantalum and Niobium Selective Extraction by Alkyl-Acetophenone

Tantalum and Niobium Selective Extraction by Alkyl-Acetophenone

... by liquid-liquid extraction process using 4-methylacetophenone (4-MAcPh) as organic ...to extraction efficiencies (k D values) at different concentrations of H 2 SO 4 in the aqueous ...similar ... See full document

12

Complex Formation and Liquid-Liquid Extraction in the Niobium(V) – 2,4-Dihydroxythiophenol– Hydrophobic Amines System

Complex Formation and Liquid-Liquid Extraction in the Niobium(V) – 2,4-Dihydroxythiophenol– Hydrophobic Amines System

... of Niobium (V) varying from ...complete separation of the phases, the organic phase was separated from the aqueous phase and the absorbance of the extracts was measured on KFK-2 at room temperature and 440 ... See full document

9

Technical Features and Research Progress of Separating Impurities in Producing Tantalum (Niobium) Oxide by Traditional Technology

Technical Features and Research Progress of Separating Impurities in Producing Tantalum (Niobium) Oxide by Traditional Technology

... purity tantalum and niobium products and to adapt to the complexity of tantalum niobium ore and waste in smelting, it was necessary to prepare high pure tantalum (niobium) oxide ... See full document

8

Chiral separation by enantioselective liquid–liquid extraction

Chiral separation by enantioselective liquid–liquid extraction

... satisfactory separation process is the multistage countercurrent process ...complete separation of enantiomers in a single stage and therefore also the selectivity requirements are not as extreme as in, for ... See full document

16

Liquid/liquid Extraction 63 LIQUID/LIQUID SEPARATION: EXTRACTION OF ACIDS OR BASES FROM NEUTRAL ORGANICS

Liquid/liquid Extraction 63 LIQUID/LIQUID SEPARATION: EXTRACTION OF ACIDS OR BASES FROM NEUTRAL ORGANICS

... one separation, you should have 80% of the material in the ether extract, and 20% of the material in the water ...ether extraction of the water should take out 80% of the remaining 4%, thus leaving less ... See full document

6

Cerium Separation from Light Rare Earth Concentrate by Liquid Liquid Extraction

Cerium Separation from Light Rare Earth Concentrate by Liquid Liquid Extraction

... elements extraction (less than 3% for all ...higher separation factors for the same ...the separation of the phases. For both systems, the extraction of rare earth elements increases with the ... See full document

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A Highly Selective Liquid-Liquid Extraction Technique for the Extraction and Separation of Hafnium (IV) With Hexaacetato Calix(6)Arene

A Highly Selective Liquid-Liquid Extraction Technique for the Extraction and Separation of Hafnium (IV) With Hexaacetato Calix(6)Arene

... (Received: October 22, 2009; Accepted: December 09, 2009) ABSTRACT Solvent extraction of Hafnium(IV) was carried out using 1 × 10 -4 M Hexaacetato Calix(6)arene in xylene at pH 2 when equilibrated for 10 minutes. ... See full document

6

Potash Breakdown of Poly Mineralized Niobium Tantalum Lanthanides Ore Material

Potash Breakdown of Poly Mineralized Niobium Tantalum Lanthanides Ore Material

... 1) KOH agitation leaching Each leaching experiment has been performed by agitating a weighed amount of the ground ore sample with the alkali using different concentrations with dif- ferent solid/liquid ratios for ... See full document

9

Liquid-liquid two phase flow and solvent extraction in the squeezing regime with on-chip separation of phases

Liquid-liquid two phase flow and solvent extraction in the squeezing regime with on-chip separation of phases

... Phase separation In Figure ...Complete separation has not been achieved. Focus was not on complete separation, but on realizing a single phase flow into the spectroscopic flow ... See full document

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Recent Progress in Ionic Liquid Extraction for the Separation of Rare Earth Elements

Recent Progress in Ionic Liquid Extraction for the Separation of Rare Earth Elements

... solvent extraction of rare earth elements (REEs) using an ionic liquid (IL) as the extraction ...IL extraction systems are advantageous owing to the affinity of ILs for both charged and ... See full document

12

Compatibility studies of several molten uranium and thorium alloys in niobium, tantalum, and yttrium

Compatibility studies of several molten uranium and thorium alloys in niobium, tantalum, and yttrium

... by niobium, Inconel, and yttrium respectively. The systems, lead in tantalum and lead in niobium, showed the greatest potentials for possible liquid-metal fuel carrier ...in tantalum ... See full document

155

Novel Technology for Chlorination of Niobium and Tantalum Oxides and Their Low Grade Ore Concentrates

Novel Technology for Chlorination of Niobium and Tantalum Oxides and Their Low Grade Ore Concentrates

... after extraction with acetonitrile represents sand contaminated by oxides and sulfates of iron, tin and ...the extraction of zinc, nickel, chromium and tungsten, whose content in the acetonitrile extract ... See full document

11

Development of a process for the concentration of the strategic tantalum and niobium oxides from tin slags

Development of a process for the concentration of the strategic tantalum and niobium oxides from tin slags

... The sequential acid and alkaline leaching process selectively concentrated refractory metals such as tantalum and niobium in a solid residue while leaching lower value elements such as silicon, calcium, ... See full document

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Liquid-Liquid Extraction and Separation of Cobalt(II) from Sodium Acetate media using Cyanex 272

Liquid-Liquid Extraction and Separation of Cobalt(II) from Sodium Acetate media using Cyanex 272

... The extraction and separation of cobalt is of great relevance and interest with the increasing demand for this metal and its ...the separation of cobalt from copper and ...Solvent extraction ... See full document

8

Chiral separation of substituted phenylalanine analogues using chiral palladium phosphine complexes with enantioselective liquid–liquid extraction

Chiral separation of substituted phenylalanine analogues using chiral palladium phosphine complexes with enantioselective liquid–liquid extraction

... Introduction The preparation of enantiomerically pure compounds is a major contemporary challenge in the pharma and chemical industry. 1 The methods available to access enantiopure compounds include resolution of ... See full document

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