GB1119843A - Process and apparatus for converting waste tungsten into ammonium tungstate solution or crystalline ammonium paratungstate by means of electrolysis - Google Patents
Process and apparatus for converting waste tungsten into ammonium tungstate solution or crystalline ammonium paratungstate by means of electrolysisInfo
- Publication number
- GB1119843A GB1119843A GB2801265A GB2801265A GB1119843A GB 1119843 A GB1119843 A GB 1119843A GB 2801265 A GB2801265 A GB 2801265A GB 2801265 A GB2801265 A GB 2801265A GB 1119843 A GB1119843 A GB 1119843A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ammonium
- scrap
- tungsten
- anode
- ammonia
- 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
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title abstract 8
- 229910052721 tungsten Inorganic materials 0.000 title abstract 5
- 239000010937 tungsten Substances 0.000 title abstract 5
- XAYGUHUYDMLJJV-UHFFFAOYSA-Z decaazanium;dioxido(dioxo)tungsten;hydron;trioxotungsten Chemical compound [H+].[H+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].[NH4+].O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O.[O-][W]([O-])(=O)=O XAYGUHUYDMLJJV-UHFFFAOYSA-Z 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 238000005868 electrolysis reaction Methods 0.000 title 1
- 239000002699 waste material Substances 0.000 title 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 9
- 229910021529 ammonia Inorganic materials 0.000 abstract 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract 3
- 239000000243 solution Substances 0.000 abstract 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 2
- 239000012535 impurity Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 229910002651 NO3 Inorganic materials 0.000 abstract 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 abstract 1
- 235000019270 ammonium chloride Nutrition 0.000 abstract 1
- 239000000908 ammonium hydroxide Substances 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 239000000110 cooling liquid Substances 0.000 abstract 1
- 239000013078 crystal Substances 0.000 abstract 1
- 238000004090 dissolution Methods 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 230000003628 erosive effect Effects 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 239000011810 insulating material Substances 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- CMPGARWFYBADJI-UHFFFAOYSA-L tungstic acid Chemical compound O[W](O)(=O)=O CMPGARWFYBADJI-UHFFFAOYSA-L 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)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
<PICT:1119843/C6-C7/1> Scrap tungsten is subjected to anodic dissolution in an aqueous solution of ammonia containing at least 10 g/1 of free ammonium hydroxid at a current density of 5 to 20 amps/1 until a concentration of 200 to 300 g/1 of ammonium tungstate is obtained. Part, e.g. 60 to 70% by volume, of the ammonium tungstate solution may be removed and evaporated to obtain ammonium paratungstate crystals. The free ammonium hydroxide concentration may be adjusted by introducing either concentrated solution or preferably gaseous ammonia. To increase the conductivity of the electrolyte there may be added tungstic acid, ammonium chloride, nitrate or carbonate, or carbon dioxide may be bubbled into the bath. To depassivate the anode surface hydrogen peroxide may be added to the bath to oxidize impurities in the scrap, metal impurities including molybdenum, being cathodically deposited together with some tungsten. Typically the process is performed in a closed cell having an inlet tube 6 for ammonia gas or solution, a suction tube 7 for the removal of electrolytically released hydrogen and ammonia, a thermometer and anode baskets 2 for the tungsten scrap, e.g. as balls of scrap wire, formed of tubes 8 through which a cooling liquid is passed to maintain a bath temperature of 40 to 50 DEG C. 80 to 95% of the anode basket surface may be coated with an insulating material to protect it from erosion. Preferably the anode baskets and the cathodes 3 arranged on both flanks of each basket are made of metal resistant to ammonia. In an alternative arrangement both cathode and anode are in the form of baskets containing scrap tungsten and the polarity is reversed every third to fifth minute.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HUEE001111 | 1964-07-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1119843A true GB1119843A (en) | 1968-07-17 |
Family
ID=10995172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2801265A Expired GB1119843A (en) | 1964-07-06 | 1965-07-01 | Process and apparatus for converting waste tungsten into ammonium tungstate solution or crystalline ammonium paratungstate by means of electrolysis |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT260176B (en) |
| DE (1) | DE1266292B (en) |
| GB (1) | GB1119843A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3936362A (en) * | 1974-06-10 | 1976-02-03 | Gte Sylvania Incorporated | Process for the manufacture of ammonium tungstate ammonium paratungstate, ammonium metatungstate and hydrated tungsten trioxide |
| US4283257A (en) * | 1980-06-09 | 1981-08-11 | Gte Products Corporation | Process for preparing ammonium metatungstate |
| CN109052477A (en) * | 2018-10-18 | 2018-12-21 | 谭琴 | A kind of sodium tungstate preparation process being used to prepare ammonium paratungstate |
| CN109368661A (en) * | 2018-11-28 | 2019-02-22 | 湖南懋天世纪新材料有限公司 | Surplus NH in alkalinity extraction tungsten production4+Utilization method |
| CN115159576A (en) * | 2022-06-17 | 2022-10-11 | 赣州海盛钨业股份有限公司 | Ammonium paratungstate preparation method capable of improving yield of ammonium paratungstate finished product |
| CN116495784A (en) * | 2023-06-20 | 2023-07-28 | 赣州市海龙钨钼有限公司 | Method for purifying ammonium paratungstate in ammonium tungstate solution |
-
1965
- 1965-06-24 AT AT574765A patent/AT260176B/en active
- 1965-06-28 DE DE1965E0029587 patent/DE1266292B/en active Pending
- 1965-07-01 GB GB2801265A patent/GB1119843A/en not_active Expired
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3936362A (en) * | 1974-06-10 | 1976-02-03 | Gte Sylvania Incorporated | Process for the manufacture of ammonium tungstate ammonium paratungstate, ammonium metatungstate and hydrated tungsten trioxide |
| US4283257A (en) * | 1980-06-09 | 1981-08-11 | Gte Products Corporation | Process for preparing ammonium metatungstate |
| CN109052477A (en) * | 2018-10-18 | 2018-12-21 | 谭琴 | A kind of sodium tungstate preparation process being used to prepare ammonium paratungstate |
| CN109368661A (en) * | 2018-11-28 | 2019-02-22 | 湖南懋天世纪新材料有限公司 | Surplus NH in alkalinity extraction tungsten production4+Utilization method |
| CN115159576A (en) * | 2022-06-17 | 2022-10-11 | 赣州海盛钨业股份有限公司 | Ammonium paratungstate preparation method capable of improving yield of ammonium paratungstate finished product |
| CN116495784A (en) * | 2023-06-20 | 2023-07-28 | 赣州市海龙钨钼有限公司 | Method for purifying ammonium paratungstate in ammonium tungstate solution |
| CN116495784B (en) * | 2023-06-20 | 2023-09-15 | 赣州市海龙钨钼有限公司 | A method for purifying ammonium paratungstate in ammonium tungstate solution |
Also Published As
| Publication number | Publication date |
|---|---|
| AT260176B (en) | 1968-02-12 |
| DE1266292B (en) | 1968-04-18 |
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