Author: Raymond A. FoosPublisher:
ISBN:
Category : Extraction (Chemistry)
Languages : en
Pages : 78
Book Description
Application of Liquid-liquid Extraction to the Separation of Tantalum from Niobium
Author: Raymond A. FoosPublisher:
ISBN:
Category : Extraction (Chemistry)
Languages : en
Pages : 78
Book Description
Separation of Niobium and Tantalum by Liquid Extraction
Author: Ernest L. KoernerPublisher:
ISBN:
Category : Extraction (Chemistry)
Languages : en
Pages : 70
Book Description
Separation of Tantalum-columbium by Solvent Extraction
Author: Kenneth B. HigbiePublisher:
ISBN:
Category : Extraction (Chemistry)
Languages : en
Pages : 60
Book Description
The Extraction and Separation of Niobium and Tantalum by Liquid-liquid Extraction Using Tri-n-butyl Phosphate
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 25
Book Description
The system proposed for the production of niobium and tantalum is liquid-liquid extraction by TBP. The combined niobium and tantalum are extracted with TBP, and the niobium is scrubbed from the organic phase with 4 N sulphuric acid. Any tantalum removed with the niobium is re-extracted with TBP and returned to the extraction circuit. Tantalum is then removed from the organic phase with 8 per cent ammonium fluoride. Recovery figures are given for the various stages of the operation, and equilibrium and settling curves are included. The long-term stability of the process and its final optimization were not investigated, and it is recommended that the optimization should be done during the commissioning of the plant.
The Extraction and Separation of Niobium and Tantalum Liquid-liquid Extraction Using Tri-n-butyl Phosphate
Author: T. H. TunleyPublisher:
ISBN: 9780869993347
Category : Niobium
Languages : en
Pages : 21
Book Description
Separation of Tantalum and Niobium by Solvent Extraction
Author: Peter Cooper StevensonPublisher:
ISBN:
Category : Niobium
Languages : en
Pages : 18
Book Description
SEPARATION OF NIOBIUM AND TANTALUM BY LIQUID EXTRACTION.
Author: Separation of Tantalum and Niobium
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A liquid-liquid extraction process for the extraction of tantalum and niobium, and their separation from each other is provided. A solution of the fluoride complexes of tantalum and niobium is firstly formed and tantalum extracted therefrom using a selective organic extractant in an amount of not more than 1 mole of extractant per mole of tantalum present. A second tantalum extraction is then carried out similarly, but using a lower concentration of not more than 0,2 moles of the same extractant per mole of tantalum originally present. Niobium is then extracted in a similar way. The extractant is one or more quaternary ammonium compounds dissolved in a hydrocarbon with an oxygen-carrying modifier, normally an alcohol, added. The tantalum and niobium-rich organic phases are optionally washed with acid and subjected to stripping to recover tantalum and niobium, generally in a precipitated form.
Extraction and Separation of Tantalum and Niobium from Mozambican Tantalite by Solvent Extraction in the Ammonium Bifluoride-octanol System
Author: Kabangu Mpinga JohnPublisher:
ISBN:
Category : Niobium
Languages : en
Pages : 182
Book Description
Separating Tantalum and Columbium by Solvent Extraction
Author: Willard L. HunterPublisher:
ISBN:
Category : Niobium
Languages : en
Pages : 18
Book Description