US1842254A - Preparation of rare metals by electrolytic decomposition of their fused double halogen compounds - Google Patents
Preparation of rare metals by electrolytic decomposition of their fused double halogen compounds Download PDFInfo
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- US1842254A US1842254A US277096A US27709628A US1842254A US 1842254 A US1842254 A US 1842254A US 277096 A US277096 A US 277096A US 27709628 A US27709628 A US 27709628A US 1842254 A US1842254 A US 1842254A
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- Prior art keywords
- uranium
- preparation
- fused
- metal
- fluoride
- Prior art date
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- Expired - Lifetime
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- 229910052751 metal Inorganic materials 0.000 title description 24
- 239000002184 metal Substances 0.000 title description 24
- 150000002366 halogen compounds Chemical class 0.000 title description 9
- 238000002360 preparation method Methods 0.000 title description 7
- 238000000354 decomposition reaction Methods 0.000 title description 6
- 150000002739 metals Chemical class 0.000 title description 2
- 229910052770 Uranium Inorganic materials 0.000 description 26
- 238000000034 method Methods 0.000 description 26
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 26
- 239000000843 powder Substances 0.000 description 16
- 230000004927 fusion Effects 0.000 description 14
- 230000008569 process Effects 0.000 description 11
- 239000003870 refractory metal Substances 0.000 description 9
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 description 5
- -1 BABE METALS Chemical class 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 230000001427 coherent effect Effects 0.000 description 4
- 238000005868 electrolysis reaction Methods 0.000 description 4
- 150000002222 fluorine compounds Chemical class 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 239000011698 potassium fluoride Substances 0.000 description 2
- 235000003270 potassium fluoride Nutrition 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000011775 sodium fluoride Substances 0.000 description 2
- 235000013024 sodium fluoride Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZSLUVFAKFWKJRC-IGMARMGPSA-N 232Th Chemical compound [232Th] ZSLUVFAKFWKJRC-IGMARMGPSA-N 0.000 description 1
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 150000001224 Uranium Chemical class 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- BRWACOVLWMKNTF-UHFFFAOYSA-G [F-].[U+6].[K+].[F-].[F-].[F-].[F-].[F-].[F-] Chemical compound [F-].[U+6].[K+].[F-].[F-].[F-].[F-].[F-].[F-] BRWACOVLWMKNTF-UHFFFAOYSA-G 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 150000001649 bromium compounds Chemical class 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000004694 iodide salts Chemical class 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 229910001120 nichrome Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002927 oxygen compounds Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 150000003671 uranium compounds Chemical class 0.000 description 1
- SANRKQGLYCLAFE-UHFFFAOYSA-H uranium hexafluoride Chemical compound F[U](F)(F)(F)(F)F SANRKQGLYCLAFE-UHFFFAOYSA-H 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/34—Electrolytic production, recovery or refining of metals by electrolysis of melts of metals not provided for in groups C25C3/02 - C25C3/32
Definitions
- fused halogen bath containing an ionizable halogen compound of the rare refractory metal recovering the metal powder from the fusion mixture by suitable lixivlation means, thereafter compacting and sintering the metal powder in an inert environment to a coherent ductile body.
- this invention is directed to the production of the rare refractory metal uranium by the electrolytic decomposition of its ionized fused halogen salts.
- the high chemical activity of uranium would prevent the preparation of the met-a1 by such electrolytic methods, but I have developed a method whereby such electrolytic decomposition of uranium salts may be effected.
- One of the objects of this invention is to provide a method of producing rare refractory metals by electrolytic decomposition of their fused halogen compounds.
- Another object of this invention is to provide a method of preparing uranium by the electrolytic decomposition of fused uranium halogen compounds.
- Another object of this invention is to provide a method whereby uranium metal may be prepared by electrolytic decompositionof 1928. Serial- NO. 277,098.
- Another object is to provide a cheaper and moreeflicient method than heretofore available for the production of uranium metal powders.
- Another object of this invention is to provide a means of recovering the uranium and other refractory metal powders from the fusedbath and to compact and sinter the same into coherent metal bodies which may subsequently be mechanically deformed into shapes useful inthe arts.
- the preparation of uranium by my process I preferably employ as an ionizable halogen compound of the metal an anhydrous double halogen compound of an alkaline metal with uranium and specifically I prefer to use the double fluoride compound of uramum with potassium, having a formula KUF
- This salt may be prepared as set forth 1n copending application Serial No. 168,826, entitled Preparation of an oxide-free halide of a rare refractory metal, and assigned to the same assignee as the present invention.
- a fusion mixture comprised of a u I natlon of the two alkalme fluondes men-' proximately one part sodium fluoride and two puma potassium fluoride which fluorides should preferably also have fusion.
- liberated uranium being very dense (18.7) and heavy, falls to the bottom of the fused bath and is protected from reacting wlth the gases of the atmosphere by the fused fluoride From time to time frequent addltions of alkali fluorides or of double alkali uranium fluoride may be made to render the, process a continuous one.
- the current applied would depend uponthe size of the bath, the spacing and the area of the electrodes, the rate at which it is deslred to deposit the metal, and other factors.
- a current density at the cathode of approximately .27 amperes per cm is nearly the correct current density. This may vary, h0w- I too high and I have found that .90 amperes per cm is approximately right to prevent the development of the so-called anode ef-' feet or polarizing at the anode which occurs when the amount of fluorine liberated is sufficient to coat or insulate the anode from the fused bath.
- the materials employed in the construction a of a suitable electrolytic chamber to conduct the electrolysis may be of any material which will resist the corrosive action of the fluoride fusion, namely carbon, graphite, nickel and some of the cast corrosive resistant alloys such as nichrome, hardite, etc.
- the electrodes may be of carbon, if desired,
- the temperature of the fused bath will vary with the amount of anode eflect developedand will range in the neighborhood of 700 C. to 800 C. While I have specified as. a fusion mixture an alkaline fluoride fusion comprised of one part sodium fluoride (NaF) to two parts potassium fluoride (KF), it is to be understood that such a fluoride fusion may vary withinwide limits and still fall within the scope of this invention.
- NaF sodium fluoride
- KF potassium fluoride
- I may use, for instance, any other co1i1 brieflyo oompoumh, such as ammonium fluoride, to further thin the bath, or, I me add thereto a proportion of any of the a aline earth fluorides.
- any other co1i1vono oompoumh such as ammonium fluoride
- I prefer to emg1oy m the practice of my invention those uorldes which in. addition to fillfilling the other requirements of my process are capable of subsequently being removed by solution in f i the conclusion of the electrolysis the llberated metal powder may be eeeeee red from the fusion in the following manner- The fused bath. is allowed to cool to room temperature in the electrolytic chamber,
- the method I may employ in the sintering and consolidation process is similar to that disclosed in copending application Seerial No. 684,908, Marden et a1, entitled Sintering and fusing uranium into a coherent body and which copending application is assigned to the same assignee as the present invention.
- the process in brief contemplates sintering and fusing (if necessary) substantially pure metal powders by initially substantially effecting de asification of the same at temperatures be ow the sinteri'ng temperature of the metal powder by slowly heating the powders in a high vacuo, removing the lib erated adsorbed or absorbed gases as fast as they are liberated, and thereafter raising the temperature to the sintering (or fusing) temperature (if desired).
- the heating has been specified as bein by inductive heating, but, of course, any other method of heating may be applied.
- refractory metals may be prepared in a similar manner through t e practice of my invention, such as tantalum, columbium, chromium, zirconium, thorium and the like, but those that may be so prepared are considered to fall within the scope of the term rare refractory metals.
Description
Patented Jan. 19, 1932 FRANK H. BRIGGS, OF BLOOMFIELD, NEW JERSEY, ASSIGNOR TO WESTINGHOUSE LAMP GOMQPANY, A CORPORATION OF PENNSYLVANIA PREPARATION OF BABE METALS BY ELECTROLYTIC DECOMPOSITION OF THEIR FUSED DOUBLE HALOGEN COMPOUNDS No Drawing.
Application filed may 11,
, fused halogen bath containing an ionizable halogen compound of the rare refractory metal, recovering the metal powder from the fusion mixture by suitable lixivlation means, thereafter compacting and sintering the metal powder in an inert environment to a coherent ductile body.
Heretofore many methods have been devised for the preparation of the so-called rare refractory metals. Most of these methods have been directed to the production of the metal by reducing compounds of the same with highly reactive metals such as sodium, magnesium, aluminum and calcium. Due to the extreme activity of the rare refractory metals in the powder state, great difficulty has been encountered in preparing them substantially free from deleterious impurities of carbon, nitrogen, oxygen, etc. Such reduction methods as have heretofore been developed have been relatively expensive to operate.
Specifically, this invention is directed to the production of the rare refractory metal uranium by the electrolytic decomposition of its ionized fused halogen salts. Heretofore it has been considered that the high chemical activity of uranium would prevent the preparation of the met-a1 by such electrolytic methods, but I have developed a method whereby such electrolytic decomposition of uranium salts may be effected.
One of the objects of this invention is to provide a method of producing rare refractory metals by electrolytic decomposition of their fused halogen compounds.
Another object of this invention is to provide a method of preparing uranium by the electrolytic decomposition of fused uranium halogen compounds.
Another object of this invention is to provide a method whereby uranium metal may be prepared by electrolytic decompositionof 1928. Serial- NO. 277,098.
fused double halogen compounds of uranium with the alkali metals.
Another object is to provide a cheaper and moreeflicient method than heretofore available for the production of uranium metal powders.
Another object of this invention is to provide a means of recovering the uranium and other refractory metal powders from the fusedbath and to compact and sinter the same into coherent metal bodies which may subsequently be mechanically deformed into shapes useful inthe arts.
Other objects and advantages will become ap arent as the process is described.
11 the preparation of uranium by my process I preferably employ as an ionizable halogen compound of the metal an anhydrous double halogen compound of an alkaline metal with uranium and specifically I prefer to use the double fluoride compound of uramum with potassium, having a formula KUF This salt may be prepared as set forth 1n copending application Serial No. 168,826, entitled Preparation of an oxide-free halide of a rare refractory metal, and assigned to the same assignee as the present invention.
The reasons why I prefer to use this particular double alkaline uranium compound 1n the electrolytic preparation of uranium are as follows: In the first place, I have found that in order to prepare substantially pure uramum I must use substantially pure uramum compounds in the electrolytic process and that this method of crystallizing uranium double fluorides ensures absolute purity as regards the uranium salt.
Secondly, I have found that fluoride fusions of uranium are more stable than chlorides, bromides, or iodides in the open air and do not tend to break down and form oxygen compounds by reaction with atmospheric oxygen. A third factor influencing the selection of this compound has been that oxygen reacts with uranium to form highly stable compounds which are insoluble and undecomposable in the alkaline fluoride fusion, and which are thereafter extremely diflicult to remove from the metal powder which may be producedby the electrolysis procedure,
As a specific embodiment of my invention I prepare a fusion mixture comprised of a u I natlon of the two alkalme fluondes men-' proximately one part sodium fluoride and two puma potassium fluoride which fluorides should preferably also have fusion.
been purified and freed of contaminating'impurities likely to be reduced to metal form during the subsequent electrolysis procedure.
To this fusion mixture either prior 110 01 after fusion I add the double alkaline fii10r1de compound of uranium, in such an amount as will completely dissolve in the fusion mlxtux-e, which vvill afipproximately be b itWeen twentyve per ce nt by welght of of he fuslon mixture employedde bath,
the
liberated uranium being very dense (18.7) and heavy, falls to the bottom of the fused bath and is protected from reacting wlth the gases of the atmosphere by the fused fluoride From time to time frequent addltions of alkali fluorides or of double alkali uranium fluoride may be made to render the, process a continuous one.
The current applied would depend uponthe size of the bath, the spacing and the area of the electrodes, the rate at which it is deslred to deposit the metal, and other factors. In the practice of my invention I have found that a current density at the cathode of approximately .27 amperes per cm is nearly the correct current density. This may vary, h0w- I too high and I have found that .90 amperes per cm is approximately right to prevent the development of the so-called anode ef-' feet or polarizing at the anode which occurs when the amount of fluorine liberated is sufficient to coat or insulate the anode from the fused bath.
The materials employed in the construction a of a suitable electrolytic chamber to conduct the electrolysis may be of any material which will resist the corrosive action of the fluoride fusion, namely carbon, graphite, nickel and some of the cast corrosive resistant alloys such as nichrome, hardite, etc.
The electrodes may be of carbon, if desired,
' or of any material resistant to the corrosive action of the flux or fluorine gas liberated.
The temperature of the fused bath will vary with the amount of anode eflect developedand will range in the neighborhood of 700 C. to 800 C. While I have specified as. a fusion mixture an alkaline fluoride fusion comprised of one part sodium fluoride (NaF) to two parts potassium fluoride (KF), it is to be understood that such a fluoride fusion may vary withinwide limits and still fall within the scope of this invention.
I may use, for instance, any other co1i1bildo oompoumh, such as ammonium fluoride, to further thin the bath, or, I me add thereto a proportion of any of the a aline earth fluorides. For the reason,fhowever, that I must subsequently recover from the fusion the metal powder substantlally free from d.c1eterious impurities I prefer to emg1oy m the practice of my invention those uorldes which in. addition to fillfilling the other requirements of my process are capable of subsequently being removed by solution in f i the conclusion of the electrolysis the llberated metal powder may be eeeeee red from the fusion in the following manner- The fused bath. is allowed to cool to room temperature in the electrolytic chamber,
thereafter it may be removed and crushed (approximately 1 part acid to 4 parts water) to dissolve out acid soluble impurities. Such acid washes should preferably be made in the cold, following which the metal powder is put through any well known minerals separation procedure to remove accompanying insoluble impurities, such as carbon, oxides, etc. Thereafter the metal powder is washed free of water by an alcohol wash followed by an ether wash, after which it is thoroughly dried in vacuo.
I have found that frequently such metal powders of uranium, prepared by my process, arepyrophoric and will spontaneously ignite and burn when exposed to the atmosphere. I have found, however, that by suitable regulation of the current density at the cathode during deposition of the metal powder to substantially increase the crystalline size thereof, such pyrophoric tendencies are mltigated, and the metal powders may subsequently be compacted, sintered and con-.
solidated to coherent metal.
The method I may employ in the sintering and consolidation process is similar to that disclosed in copending application Seerial No. 684,908, Marden et a1, entitled Sintering and fusing uranium into a coherent body and which copending application is assigned to the same assignee as the present invention. I
The process in brief, contemplates sintering and fusing (if necessary) substantially pure metal powders by initially substantially effecting de asification of the same at temperatures be ow the sinteri'ng temperature of the metal powder by slowly heating the powders in a high vacuo, removing the lib erated adsorbed or absorbed gases as fast as they are liberated, and thereafter raising the temperature to the sintering (or fusing) temperature (if desired). In the copending application the heating has been specified as bein by inductive heating, but, of course, any other method of heating may be applied.
Having outlined in the broadest aspect the nature of my invention and specifically directed the same to the production of uranium,
it is apparent that there may be many variations of the same whereby essentially the same result may be obtained, but such variations are anticipated as may fall within the scope ofmy claims.
25, Other refractory metals ma be prepared in a similar manner through t e practice of my invention, such as tantalum, columbium, chromium, zirconium, thorium and the like, but those that may be so prepared are considered to fall within the scope of the term rare refractory metals.
What is claimed is: p 1., The process of preparing uranium comprising electrolytically decomposing a double halogen compound of uranium in solution in a fused bath comprised of alkali halogen compounds.
I 2. The process of preparing uranium comprisin electrolytically decomposing a double fluori e compound of uranium in solution in adfused bath comprised of alkali metal fluor- 1 es.
3. The process of preparing uranium comprising electrolytically decomposing the double potassium uranium fluoride (KUF in solution in a fused bath comprised of potassium and sodium'fiuorides.
4. The process of p eparin uranium comprised in electrolytlcally ecomposing a I fused bath composed of potassium fluoride (2 parts) sodium fluoride (lpart) potassium and uranium double fluoride up to 25 percent of the total (by wei ht).
In testimony whereoi I have hereunto subscribed my name this 9th day of May,
FRANK H. DRIGGS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US277096A US1842254A (en) | 1928-05-11 | 1928-05-11 | Preparation of rare metals by electrolytic decomposition of their fused double halogen compounds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US277096A US1842254A (en) | 1928-05-11 | 1928-05-11 | Preparation of rare metals by electrolytic decomposition of their fused double halogen compounds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1842254A true US1842254A (en) | 1932-01-19 |
Family
ID=23059387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US277096A Expired - Lifetime US1842254A (en) | 1928-05-11 | 1928-05-11 | Preparation of rare metals by electrolytic decomposition of their fused double halogen compounds |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1842254A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2519792A (en) * | 1942-04-10 | 1950-08-22 | Rosen Raphael | Electrolytic production of metallic uranium |
| US2690421A (en) * | 1943-03-06 | 1954-09-28 | William C Lilliendahl | Electrolytic production of uranium powder |
| US2715093A (en) * | 1952-01-25 | 1955-08-09 | Senderoff Seymour | Electrolytic production of molybdenum powder and coherent deposits |
| US2777809A (en) * | 1948-03-25 | 1957-01-15 | Kolodney Morris | Preparation of uranium |
| US2824053A (en) * | 1955-10-17 | 1958-02-18 | Horizons Titanium Corp | Electrolytic production of ductile chromium |
| US2893928A (en) * | 1948-04-28 | 1959-07-07 | Kolodney Morris | Preparation of plutonium |
| US2921890A (en) * | 1950-03-27 | 1960-01-19 | Chicago Dev Corp | Electrolytic method for the production of pure titanium |
| US2956936A (en) * | 1956-08-14 | 1960-10-18 | Ciba Ltd | Process for the production of metallic niobium or tantalum by the electrolysis of melts |
| US3024174A (en) * | 1958-12-24 | 1962-03-06 | Solar Aircraft Co | Electrolytic production of titanium plate |
| US3192139A (en) * | 1960-04-21 | 1965-06-29 | Siemens Ag | Method for producing hyperpure gallium |
| US3444058A (en) * | 1967-01-16 | 1969-05-13 | Union Carbide Corp | Electrodeposition of refractory metals |
| US20120034153A1 (en) * | 2010-08-06 | 2012-02-09 | Massachusetts Institute Of Technology | Electrolytic recycling of compounds |
-
1928
- 1928-05-11 US US277096A patent/US1842254A/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2519792A (en) * | 1942-04-10 | 1950-08-22 | Rosen Raphael | Electrolytic production of metallic uranium |
| US2690421A (en) * | 1943-03-06 | 1954-09-28 | William C Lilliendahl | Electrolytic production of uranium powder |
| US2777809A (en) * | 1948-03-25 | 1957-01-15 | Kolodney Morris | Preparation of uranium |
| US2893928A (en) * | 1948-04-28 | 1959-07-07 | Kolodney Morris | Preparation of plutonium |
| US2921890A (en) * | 1950-03-27 | 1960-01-19 | Chicago Dev Corp | Electrolytic method for the production of pure titanium |
| US2715093A (en) * | 1952-01-25 | 1955-08-09 | Senderoff Seymour | Electrolytic production of molybdenum powder and coherent deposits |
| US2824053A (en) * | 1955-10-17 | 1958-02-18 | Horizons Titanium Corp | Electrolytic production of ductile chromium |
| US2956936A (en) * | 1956-08-14 | 1960-10-18 | Ciba Ltd | Process for the production of metallic niobium or tantalum by the electrolysis of melts |
| US3024174A (en) * | 1958-12-24 | 1962-03-06 | Solar Aircraft Co | Electrolytic production of titanium plate |
| US3192139A (en) * | 1960-04-21 | 1965-06-29 | Siemens Ag | Method for producing hyperpure gallium |
| US3444058A (en) * | 1967-01-16 | 1969-05-13 | Union Carbide Corp | Electrodeposition of refractory metals |
| US20120034153A1 (en) * | 2010-08-06 | 2012-02-09 | Massachusetts Institute Of Technology | Electrolytic recycling of compounds |
| US9605354B2 (en) * | 2010-08-06 | 2017-03-28 | Massachusetts Institute Of Technology | Electrolytic recycling of compounds |
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