US1896606A - Purifying tungsten - Google Patents
Purifying tungsten Download PDFInfo
- Publication number
- US1896606A US1896606A US317493A US31749328A US1896606A US 1896606 A US1896606 A US 1896606A US 317493 A US317493 A US 317493A US 31749328 A US31749328 A US 31749328A US 1896606 A US1896606 A US 1896606A
- Authority
- US
- United States
- Prior art keywords
- silver
- tungsten
- thoria
- reduction
- oxide
- 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 - Lifetime
Links
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title description 12
- 229910052721 tungsten Inorganic materials 0.000 title description 12
- 239000010937 tungsten Substances 0.000 title description 12
- 229910052709 silver Inorganic materials 0.000 description 13
- 239000004332 silver Substances 0.000 description 13
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000009467 reduction Effects 0.000 description 7
- 239000001257 hydrogen Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 4
- 229910021607 Silver chloride Inorganic materials 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 238000007665 sagging Methods 0.000 description 3
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 3
- 229910001961 silver nitrate Inorganic materials 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- XMVONEAAOPAGAO-UHFFFAOYSA-N sodium tungstate Chemical compound [Na+].[Na+].[O-][W]([O-])(=O)=O XMVONEAAOPAGAO-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VGBPIHVLVSGJGR-UHFFFAOYSA-N thorium(4+);tetranitrate Chemical compound [Th+4].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VGBPIHVLVSGJGR-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 241000287181 Sturnus vulgaris Species 0.000 description 1
- 229910000754 Wrought iron Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000021183 entrée Nutrition 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- 229940100890 silver compound Drugs 0.000 description 1
- 150000003379 silver compounds Chemical class 0.000 description 1
- 229910001923 silver oxide Inorganic materials 0.000 description 1
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9265—Special properties
- Y10S428/929—Electrical contact feature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9335—Product by special process
- Y10S428/936—Chemical deposition, e.g. electroless plating
Definitions
- This invention relates to the production and purification of tungsten, and to electric conducting elements made therefrom, especially those which become highly heated in use such as electrical make-and-break contact points, incandescent filaments, etc.
- the customary procedure is first to reduce tungstic oxide by hydrogen with the production or" a granular metallic powder, and next to sin ter the resulting granular substance together into the form of a somewhat porous rod or ingot by the use of a very high tem perature, after which the same is wrought by swaging, drawing, etc., the procedure being substantially the same as was employed in the making of wrought iron in the days when a sufficiently high temperature for the complete fusion of the iron was unattainable.
- Such a metal is silver; and it is within my invention to mix finely divided silver with the previously reduced granular tungsten, and afterwards to compact and sinter the whole, finally raising the temperature to such a degree as wholly to volatilize the silver which takes with it all traces of oxygen.
- the resulting bar or ingot shows no trace Application filed November 5, 1928. Serial No. 317,493.
- Another way of securing the intimate admixture of metals necessary to the performance of this process is to reduce them simultaneously by hydrogen.
- One way in which this can be done is to mix silver chloride intimately with the tungsten or other oxide, prior to the reduction by hydrogen, since silven chloride is likewise reduced under these conditions.
- a still better way is to precipitate the silver compound into the tungstic oxide so as to obtainthe most complete incorporation at all stages of the process.
- This reduction serves merely to change the thorium nitrate to oxide and I find that with the presence of silver as herein described I can work the resulting metal into filament form successfully even with a thoria content up to 3% although the silver is wholly volatilized during the sintering operation. This advantage is present whether or not special additional steps are taken to reduce the thoria to metallic form.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Powder Metallurgy (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US317493A US1896606A (en) | 1928-11-05 | 1928-11-05 | Purifying tungsten |
| BE365022D BE365022A (enrdf_load_stackoverflow) | 1928-11-05 | 1929-11-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US317493A US1896606A (en) | 1928-11-05 | 1928-11-05 | Purifying tungsten |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1896606A true US1896606A (en) | 1933-02-07 |
Family
ID=23233894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US317493A Expired - Lifetime US1896606A (en) | 1928-11-05 | 1928-11-05 | Purifying tungsten |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1896606A (enrdf_load_stackoverflow) |
| BE (1) | BE365022A (enrdf_load_stackoverflow) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2476208A (en) * | 1943-10-28 | 1949-07-12 | Int Nickel Co | Sintered precious metal product |
| US2669008A (en) * | 1951-06-30 | 1954-02-16 | Philips Lab Inc | Method of manufacturing tungsten articles of predetermined shape and dimensions |
| US3091525A (en) * | 1959-05-01 | 1963-05-28 | Stauffer Chemical Co | Deoxidation of refractory metal |
-
1928
- 1928-11-05 US US317493A patent/US1896606A/en not_active Expired - Lifetime
-
1929
- 1929-11-04 BE BE365022D patent/BE365022A/xx unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2476208A (en) * | 1943-10-28 | 1949-07-12 | Int Nickel Co | Sintered precious metal product |
| US2669008A (en) * | 1951-06-30 | 1954-02-16 | Philips Lab Inc | Method of manufacturing tungsten articles of predetermined shape and dimensions |
| US3091525A (en) * | 1959-05-01 | 1963-05-28 | Stauffer Chemical Co | Deoxidation of refractory metal |
Also Published As
| Publication number | Publication date |
|---|---|
| BE365022A (enrdf_load_stackoverflow) | 1929-12-31 |
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