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
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1396264A (en) | Process for the preparation of ethylene glycol | |
| GB434302A (en) | Improvements in or relating to the absorption of nitrogen oxides | |
| GB872355A (en) | Improvements in or relating to the production of a tetrabasic acid and esters thereof | |
| GB740868A (en) | Improvements in or relating to the separation of niobium and tantalum | |
| GB1531561A (en) | Iron oxide pigment and process for preparing such a pigment | |
| GB455734A (en) | Process for the absorption, in highly-concentrated nitric acid, of nitrous gases formed by the combustion of ammonia | |
| GB173479A (en) | Improved process of purifying lactic acid | |
| GB1280855A (en) | Process for the recovery of metallic catalysts | |
| GB1251925A (en) | ||
| GB519570A (en) | Process for the manufacture of sulphur trioxide | |
| GB951663A (en) | Process for the preparation of 6-deoxy-6-demethyl-6-methylene-5-oxytetracycline | |
| GB593571A (en) | Improvements in or relating to the manufacture of crotonic acid | |
| GB848617A (en) | Improvements in or relating to the preparation of anhydrite | |
| GB551653A (en) | Improvements in the treatment of residues in sugar manufacture | |
| GB337847A (en) | A process for working up oxides of nitrogen | |
| GB910732A (en) | Recovery process | |
| GB1023102A (en) | Process for production of nitrogen tetroxide | |
| GB547155A (en) | Improvements in purification of gases | |
| GB521639A (en) | A process for purifying water | |
| GB441223A (en) | Improvements in or relating to the production of precipitated calcium carbonate | |
| GB467517A (en) | Process for the treatment of alloys and other materials containing copper and nickel | |
| GB368027A (en) | Improvements in the manufacture and production of dimethylol urea | |
| GB1377588A (en) | Process for preparing dinitroanthraquinones | |
| GB521202A (en) | Improvements in or relating to the recovery of aliphatic acids | |
| GB639491A (en) | Process for the manufacture of a dicarboxylic acid |