GB593906A - Improvements in or relating to the production of tungstic anhydride - Google Patents
Improvements in or relating to the production of tungstic anhydrideInfo
- Publication number
- GB593906A GB593906A GB1935344A GB1935344A GB593906A GB 593906 A GB593906 A GB 593906A GB 1935344 A GB1935344 A GB 1935344A GB 1935344 A GB1935344 A GB 1935344A GB 593906 A GB593906 A GB 593906A
- Authority
- GB
- United Kingdom
- Prior art keywords
- precipitation
- excess
- hydrochloric acid
- tungstic
- alkali
- 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
- ZNOKGRXACCSDPY-UHFFFAOYSA-N Tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 title abstract 3
- 238000004519 manufacturing process Methods 0.000 title abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 8
- 238000001556 precipitation Methods 0.000 abstract 5
- CMPGARWFYBADJI-UHFFFAOYSA-L Tungstic acid Chemical compound O[W](O)(=O)=O CMPGARWFYBADJI-UHFFFAOYSA-L 0.000 abstract 4
- 239000003513 alkali Substances 0.000 abstract 3
- PBYZMCDFOULPGH-UHFFFAOYSA-N tungstate Chemical compound [O-][W]([O-])(=O)=O PBYZMCDFOULPGH-UHFFFAOYSA-N 0.000 abstract 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 2
- 230000004927 fusion Effects 0.000 abstract 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 2
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract 1
- DVARTQFDIMZBAA-UHFFFAOYSA-O Ammonium nitrate Chemical compound [NH4+].[O-][N+]([O-])=O DVARTQFDIMZBAA-UHFFFAOYSA-O 0.000 abstract 1
- 150000001339 alkali metal compounds Chemical class 0.000 abstract 1
- 235000019270 ammonium chloride Nutrition 0.000 abstract 1
- 150000003868 ammonium compounds Chemical class 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- QDHHCQZDFGDHMP-UHFFFAOYSA-N monochloramine Chemical compound ClN QDHHCQZDFGDHMP-UHFFFAOYSA-N 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000001187 sodium carbonate Substances 0.000 abstract 1
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G41/00—Compounds of tungsten
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
In a process for the production of tungstic oxide by fusion of tungsten ore with alkali followed by the solution of the product in water at a maximum concentration of 0.5 gr. mol. of alkali tungstate per litre, precipitation of tungstic acid by the addition of hydrochloric acid, and separation of the tungstic acid which is redissolved in ammonia at the same concentration preparatory to a second precipitation by hydrochloric acid, the tungstate solution before each of the precipitations contains an excess of at least 8 mols. (preferably 15 to 25 mols.) per mol. of tungstate, of an ionized alkali metal or ammonium compound. The excess of ionized compound in the first precipitation may be formed by using an excess of alkali, e.g., 10 to 30 times the amount stoichiometrically necessary of sodium carbonate, in the fusion of the ore, which forms sodium chloride on addition of the hydrochloric acid. For the second precipitation, the ionized compound is formed by dissolving the precipitated tungstic acid in excess of 25 per cent. ammonia which gives ammonium chloride on addition of hydrochloric acid. After the final precipitation, the tungstic acid is filtered off, washed with 20 to 40 per cent. ammonium nitrate, and calcined at 800 to 1000 DEG C.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB593906A true GB593906A (en) | 1947-10-29 |
Family
ID=1734653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1935344A Expired GB593906A (en) | 1944-10-09 | Improvements in or relating to the production of tungstic anhydride |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB593906A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2735748A (en) * | 1956-02-21 | Process for recovery of tungsten values | ||
| US2993755A (en) * | 1958-08-13 | 1961-07-25 | Union Carbide Corp | Preparation of tungstic oxide |
| US3854930A (en) * | 1973-11-05 | 1974-12-17 | Molybdenum Corp | Process for the removal of lead from molybdenite |
| CN117886361A (en) * | 2024-03-14 | 2024-04-16 | 崇义章源钨业股份有限公司 | Method for washing tungstic acid |
-
1944
- 1944-10-09 GB GB1935344A patent/GB593906A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2735748A (en) * | 1956-02-21 | Process for recovery of tungsten values | ||
| US2993755A (en) * | 1958-08-13 | 1961-07-25 | Union Carbide Corp | Preparation of tungstic oxide |
| US3854930A (en) * | 1973-11-05 | 1974-12-17 | Molybdenum Corp | Process for the removal of lead from molybdenite |
| CN117886361A (en) * | 2024-03-14 | 2024-04-16 | 崇义章源钨业股份有限公司 | Method for washing tungstic acid |
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