GB833170A - Improvements in or relating to a method of reducing tungsten compounds - Google Patents
Improvements in or relating to a method of reducing tungsten compoundsInfo
- Publication number
- GB833170A GB833170A GB18024/58A GB1802458A GB833170A GB 833170 A GB833170 A GB 833170A GB 18024/58 A GB18024/58 A GB 18024/58A GB 1802458 A GB1802458 A GB 1802458A GB 833170 A GB833170 A GB 833170A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tungstenate
- grammes
- dope
- ammonium para
- tungsten
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/30—Obtaining chromium, molybdenum or tungsten
- C22B34/36—Obtaining tungsten
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Tungsten compounds are reduced using potassium silico-tungstenate of the formula K4SiW12O40, with or without water of crystallization, as "dope". The starting product, e.g. ammonium para-tungstenate, may be soaked in the "dope", which may contain some aluminium nitrate, prior to reduction in a single stage with hydrogen and tungsten. In an example, ammonium para-tungstenate is soaked in a "dope" in an enamelled cup provided with a steam jacket the mass being continuously stirred until the water has evaporated. The proportion of dope to ammonium para-tungstenate is such as to give 4.6 grammes K4SiW12O10 and 0.06 grammes Al per 100 grammes tungsten. After drying, reduction is carried out in a single stage in a horizontal tubular furnace divided into sections at 750, 800 and 825 DEG C. A boat of 500 grammes ammonium para-tungstenate travelled through the furnace in 3/4 hour, and a powder with an average grain size of 2-4 microns was produced.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL833170X | 1957-06-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB833170A true GB833170A (en) | 1960-04-21 |
Family
ID=19843042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB18024/58A Expired GB833170A (en) | 1957-06-07 | 1958-06-05 | Improvements in or relating to a method of reducing tungsten compounds |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB833170A (en) |
-
1958
- 1958-06-05 GB GB18024/58A patent/GB833170A/en not_active Expired
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