GB740868A - Improvements in or relating to the separation of niobium and tantalum - Google Patents
Improvements in or relating to the separation of niobium and tantalumInfo
- Publication number
- GB740868A GB740868A GB31512/53A GB3151253A GB740868A GB 740868 A GB740868 A GB 740868A GB 31512/53 A GB31512/53 A GB 31512/53A GB 3151253 A GB3151253 A GB 3151253A GB 740868 A GB740868 A GB 740868A
- Authority
- GB
- United Kingdom
- Prior art keywords
- niobium
- phase
- tantalum
- mixture
- tetroxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G33/00—Compounds of niobium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
Niobium and tantalum are separated at least partially by reducing a mixture of the pentoxides to a stage in which a niobium-enriched tetroxide phase is present, dissolving said phase in hot sulphuric or phosphoric acid, to the former of which selenium oxychloride may, if desired be added, and separating the dissolved tetroxide phase. In the example, a mixture of oxides is reduced with hydrogen containing water vapour at a partial pressure of 0.04 mm. and the product treated with 80 per cent by weight sulphuric acid at 200 DEG C. The mixture is filtered and acids of niobium and tantalum are precipitated, e.g. with ammonia. When using hydrogen, a low water content favours a pentoxide phase poor in niobium and a tetroxide phase rich in tantalum and a high water content favours the reverse. Carbon monoxide, if desired in admixture with carbon dioxide may alternatively be used as reducing agent. More intense reduction leads to a pentoxide phase poor in niobium and less intense reduction to a phase poor in tantalum.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE740868X | 1952-11-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB740868A true GB740868A (en) | 1955-11-23 |
Family
ID=6644165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31512/53A Expired GB740868A (en) | 1952-11-17 | 1953-11-13 | Improvements in or relating to the separation of niobium and tantalum |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB740868A (en) |
-
1953
- 1953-11-13 GB GB31512/53A patent/GB740868A/en not_active Expired
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