US2357614A - Treating finely divided magnesium - Google Patents
Treating finely divided magnesium Download PDFInfo
- Publication number
- US2357614A US2357614A US475454A US47545443A US2357614A US 2357614 A US2357614 A US 2357614A US 475454 A US475454 A US 475454A US 47545443 A US47545443 A US 47545443A US 2357614 A US2357614 A US 2357614A
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- United States
- Prior art keywords
- magnesium
- finely divided
- treating
- mercury
- metallic
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- 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.)
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Classifications
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- 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
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/20—Obtaining alkaline earth metals or magnesium
- C22B26/22—Obtaining magnesium
Definitions
- Thi invention relates to a method oi consoli- I dating finely divided metallic magnesium.
- magnesium vapors are frequently subjected to a so-called shock-chilling" operation to quickly cool the vapors to a temperature below that at which the magnesium will react with substantial velocity with the associated carbon monoxide.
- shock-chilling sults in the formation of very finely dividedparticles of metallic magnesium, which may be coated with hydrocarbon oils and which frequently contain substantial amounts of carbon, magnesium oxide and other materials.
- the treatment of this finely divided magnesium presents n'iany difliculties because of its pyrophoric properties, its relatively low heat conductivity and its high bulk volume.
- this material as well as finely divided magnesium material in general, can be effectively consolidated by treating the finely divided magnesium with a metal having a lower melting point and a lower boiling point than magnesium.
- the treatment is preferably carried out at a temperature somewhat higher than the melting point of the treating metal.
- the treating metal is removed from the residual magnesium, for example, by distillation,
- metals which may advantageously be used for the purposes of the invention are mercury, cadmium, zinc and sodium.
- finely divided metallic magnesium containing material obtained by the shockchilling of magnesium vapors from the thermal reduction of magnesium oxide with carbonaceous material is added to approximately an equal volume of metallic mercury and the mixture is then subjected to agitation at about 100 (3., for example, in a vapor tight rotating drum, until the metallic magnesium has substantially completely amalgamated with the mercury.
- the mercury is then separated from the magnesium by distillation.
- the consolidated magnesium may then be either cast directly or subjected to distillation This operation re-- or sublimation.
- the consolidation may be accelerated by increasing the temperature of the treating, for example, by heating the mixture of mercury and finely divided mag- I nesium to the boiling point of the mercury, preferably while refluxing any mercury vapors which are produced.
- a method of consolidating finely divided solid metallic magnesium which comprises treating the finely divided magnesium with a metal havinga lower melting point and a lower boiling point than magnesium at atemperature above the melting point of the treating metal and thereafter separating the treating metal from the magnesium.
- a method of consolidating finely divided solid metallic magnesium which comprises treating the finely divided magnesium with a metal 7 selected from the group consisting of mercury, cadmium, zinc and sodium at a temperature above the melting point of the treating metal and thereafter separating the treating metal from the magnesium.
- a method of consolidating finely divided solid metallic magnesium which comprises treating the finely divided magnesium with a metal having a lower melting point and a lower boiling point than magnesium at a temperature above the melting point of the treating metal and thereafter distilling the treating metal from the magnesium.
- a method of consolidating finely divided solid metallic magnesium which comprises treating the finely divided magnesium with metallic mercury, and thereafter distilling the mercury from the magnesium.
Description
Patented Sept. 5, 1944 2,357,614 TREATING FINELY DIVIDED MAGNESIUM Harold T. Stowell, Westnioreland Hills, Md., assignor to St. Joseph Lead Company, New York,
N. Y., a corporation of New York No Drawing. Application February 10, 1943. Serial No. 475,454
Claims.
Thi invention relates to a method oi consoli- I dating finely divided metallic magnesium.
In the production of magnesium by thermal reduction processes, the magnesium vapors are frequently subjected to a so-called shock-chilling" operation to quickly cool the vapors to a temperature below that at which the magnesium will react with substantial velocity with the associated carbon monoxide. sults in the formation of very finely dividedparticles of metallic magnesium, which may be coated with hydrocarbon oils and which frequently contain substantial amounts of carbon, magnesium oxide and other materials. The treatment of this finely divided magnesium presents n'iany difliculties because of its pyrophoric properties, its relatively low heat conductivity and its high bulk volume.
It has been found that this material as well as finely divided magnesium material, in general, can be effectively consolidated by treating the finely divided magnesium with a metal having a lower melting point and a lower boiling point than magnesium. The treatment is preferably carried out at a temperature somewhat higher than the melting point of the treating metal. After the consolidation of the metallic magnesium particles by solution or alloying with the treating metal, the treating metal is removed from the residual magnesium, for example, by distillation,
Among the metals which may advantageously be used for the purposes of the invention are mercury, cadmium, zinc and sodium.
For example, finely divided metallic magnesium containing material obtained by the shockchilling of magnesium vapors from the thermal reduction of magnesium oxide with carbonaceous material is added to approximately an equal volume of metallic mercury and the mixture is then subjected to agitation at about 100 (3., for example, in a vapor tight rotating drum, until the metallic magnesium has substantially completely amalgamated with the mercury. The mercury is then separated from the magnesium by distillation. The consolidated magnesium may then be either cast directly or subjected to distillation This operation re-- or sublimation. If the finely divided magnesium contains substantial amounts of oil or other substances which tend to prevent contact of the mercury with the metallic particles, the consolidation may be accelerated by increasing the temperature of the treating, for example, by heating the mixture of mercury and finely divided mag- I nesium to the boiling point of the mercury, preferably while refluxing any mercury vapors which are produced.
I claim:
1. A method of consolidating finely divided solid metallic magnesium which comprises treating the finely divided magnesium with a metal havinga lower melting point and a lower boiling point than magnesium at atemperature above the melting point of the treating metal and thereafter separating the treating metal from the magnesium.
2. A method of consolidating finely divided solid metallic magnesium which comprises treating the finely divided magnesium with a metal 7 selected from the group consisting of mercury, cadmium, zinc and sodium at a temperature above the melting point of the treating metal and thereafter separating the treating metal from the magnesium.
3. A method of consolidating finely divided solid metallic magnesium which comprises treating the finely divided magnesium with a metal having a lower melting point and a lower boiling point than magnesium at a temperature above the melting point of the treating metal and thereafter distilling the treating metal from the magnesium.
4. A method of consolidating finely divided solid metallic magnesium which comprises treating the finely divided magnesium with metallic mercury, and thereafter distilling the mercury from the magnesium.
5. A method of consolidating finely divided solidmetallic magnesium which comprises treating the finely divided magnesium with metallic mercury at approximately the boiling point of mercury, and thereafter distilling the mercury from the magnesium.
' HAROLD T. STOWELL.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US475454A US2357614A (en) | 1943-02-10 | 1943-02-10 | Treating finely divided magnesium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US475454A US2357614A (en) | 1943-02-10 | 1943-02-10 | Treating finely divided magnesium |
Publications (1)
Publication Number | Publication Date |
---|---|
US2357614A true US2357614A (en) | 1944-09-05 |
Family
ID=23887632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US475454A Expired - Lifetime US2357614A (en) | 1943-02-10 | 1943-02-10 | Treating finely divided magnesium |
Country Status (1)
Country | Link |
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US (1) | US2357614A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2684898A (en) * | 1947-01-03 | 1954-07-27 | Ici Ltd | Distillation of calcium |
US2728134A (en) * | 1950-03-20 | 1955-12-27 | Allied Prod Corp | Process of making perforated composite oil well bearings |
-
1943
- 1943-02-10 US US475454A patent/US2357614A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2684898A (en) * | 1947-01-03 | 1954-07-27 | Ici Ltd | Distillation of calcium |
US2728134A (en) * | 1950-03-20 | 1955-12-27 | Allied Prod Corp | Process of making perforated composite oil well bearings |
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