US2034339A - Refining of aluminum - Google Patents
Refining of aluminum Download PDFInfo
- Publication number
- US2034339A US2034339A US695899A US69589933A US2034339A US 2034339 A US2034339 A US 2034339A US 695899 A US695899 A US 695899A US 69589933 A US69589933 A US 69589933A US 2034339 A US2034339 A US 2034339A
- Authority
- US
- United States
- Prior art keywords
- aluminum
- electrolyte
- fluoride
- layer
- refining
- 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
Images
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
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/24—Refining
Definitions
- the present invention relates to processes in which the aluminum to be refined alloyed with a heavy metal, copper for instance, is at the bottom of the apparatus, forming a melted anode, denser than the electrolyte, while the aluminum resulting from the electrolysis forms a liquid layer, which floats on the electrolyte and acts as a cathode.
- Such a bath is less expensive than those containing only fluorides, since alkali-earth chlorides are cheaper than the corresponding fluorides. Furthermore, and this is a more important advantage from the technical point of view, it permits of working at a temperature of about 700- 800 C. instead of 1000 C. with baths containing only fluorides. This possibility of working at a lower temperature eliminates substantially the production of smoke.
- the electrolyte should have a density ranging between that of aluminum and that of the alloy utilized as anode, which determines the percentage of alkali-earth chloride, the composition of the electrolyte being further chosen with a view to giving it a melting point as low as possible.
- minum fluoride that is as follows:
- the process according to the present invention may be carried out in various kinds of apparatus previously proposed for the refining of aluminum through the known method of the three melted layers of anodic alloy, electrolyte, and cathodic aluminum.
- the only-figure is a vertical sectional view of a tank permitting the electrolytic refining of aluminum without involving any of the dangers and difllculties caused by the presence or the water jacket in apparatus of the usual type.
- This apparatus includes a tank a, oi. circula shape, the inner wall of which is merely made of bricks of magnesia b.
- the bottom of the tank is provided with a sole 0, preferably plane, of compact carbon, connected to the positive terminal of the electrolytic circuit. This sole serves to feed current to the anodic alloy d located above it.
- the melted electrolyte e floats on the anode. It has been ascertained that this electrolyte does not attack the bricks of magnesia of the tank in which it lies, while it is known that such bricks are severely attacked by the ordinary baths of fluoride utilized at temperatures close to 1000" C. As there is no cold wall, the whole of the electrolyte remains. in the melted state, its composition does not vary and there is no formation oi! scum on the anodic alloy.
- the pure cathodic metal I floats on the electrolyte and current is supplied thereto through a carbon rod g or through any other suitable means.
- a method of refining aluminum which comprises superposing in an electrolytic apparatus a layer of a molten alloy containing aluminum, forming the anode, a layer of melted electrolyte,
- the electrolyte comprises 23 per cent in weight 01' aluminum fluoride, 17 per cent sodium fluoride, and 60 per cent barium chloride.
- a method of reflning aluminum which comprises superposing in an electrolytic apparatus a layer of a molten alloy containing aluminum, forming the anode, a layer of melted electrolyte, and a layer of aluminum forming the cathode, in which the electrolyte comprises 27 per cent in weight of aluminum fluoride, 13 per cent sodium fluoride, and 60 per cent barium chloride.
- a method of electrically refining aluminum which comprises superposing in an electrolytic apparatus a layer of a molten alloy containing aluminum forming the anode, a layer of melted electrolyte, and a layer of aluminum forming the cathode, in which the elctrolyte comprises a mixture of aluminum fluoride, an alkaline fluoride and an alkali-earth chloride, the ratio of the amount of aluminum fluoride to that of the alkaline fluoride being greater than the ratio of the amount of aluminum fluoride to that of sodium fluoride in cryolite, said electrolyte having a melting point between 700 C. and 800 C.
- a method of electrically refining aluminum which comprises superposing in an electrolytic apparatus a layer of a molten alloy containing aluminum forming the anode, a layer of melted electrolyte, and a layer of aluminum forming the cathode, in which the electrolyte comprises a mixture of aluminum fluoride, sodium fluoride and an alkali-earth chloride, the ratio of the amount of aluminum fluoride to that of sodium fluoride being greater than the corresponding ratio of the same bodies in cryolite, said electrolyte having a melting point between 700 C. and 800 C.
- a method of refining aluminum which comprises superposing in an electrolytic apparatus a layer of a molten alloy containing aluminum forming the anode, a layer of melted electrolyte, and a layer of aluminum forming the cathode, in which the electrolyte comprises a mixture of aluminupi fluoride, sodium fluoride, and barium chloride, the ratio of the amount of aluminum fluoride to that of sodium fluoride in the electrolyte being greater than the corresponding ratio of the same bodies in cryolite, said electrolyte having a melting point between 700 C. and 800 C.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR600555X | 1932-11-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2034339A true US2034339A (en) | 1936-03-17 |
Family
ID=8970306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US695899A Expired - Lifetime US2034339A (en) | 1932-11-08 | 1933-10-30 | Refining of aluminum |
Country Status (6)
Country | Link |
---|---|
US (1) | US2034339A (sv) |
BE (1) | BE399344A (sv) |
DE (1) | DE600555C (sv) |
FR (1) | FR759588A (sv) |
GB (1) | GB405596A (sv) |
NL (1) | NL37494C (sv) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2528905A (en) * | 1947-09-08 | 1950-11-07 | Alais & Froges & Camarque Cie | Construction of the lower portion of igneous electrolytic cells |
US2582661A (en) * | 1945-12-03 | 1952-01-15 | Pechiney Prod Chimiques Sa | Method for electrolytically refining aluminum |
US2773825A (en) * | 1944-04-28 | 1956-12-11 | Frank A Newcombe | Electrolysis apparatus |
US2824057A (en) * | 1950-08-12 | 1958-02-18 | Aluminum Co Of America | Electrolytic reduction cell for producing aluminum |
US3386908A (en) * | 1963-12-04 | 1968-06-04 | Pechiney Prod Chimiques Sa | Cell for refining aluminum by fusion electrolysis |
US9932681B2 (en) | 2012-01-20 | 2018-04-03 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Electrolytic cell |
US10407786B2 (en) | 2015-02-11 | 2019-09-10 | Alcoa Usa Corp. | Systems and methods for purifying aluminum |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE752100C (de) * | 1935-05-17 | 1952-04-07 | Aluminium Ind Ag | Verfahren zur elektrolytischen Gewinnung von reinem Aluminium |
DE766062C (de) * | 1939-12-06 | 1951-08-09 | Vaw Ver Aluminium Werke Ag | Verfahren und Vorrichtung zur Laeuterung von Aluminium |
DE1160647B (de) * | 1958-06-24 | 1964-01-02 | Atomic Energy Commission | Schmelzelektrolytisches Verfahren zur Anreicherung von Uran und/oder Plutonium in Aluminiumlegierungen |
FR2708000B1 (fr) * | 1993-07-22 | 1995-08-25 | Pechiney Aluminium | Aluminium électroraffiné à basse teneur en uranium, thorium et terres rares. |
-
0
- BE BE399344D patent/BE399344A/xx unknown
- NL NL37494D patent/NL37494C/xx active
-
1932
- 1932-11-08 FR FR759588D patent/FR759588A/fr not_active Expired
- 1932-11-11 DE DEC47149D patent/DE600555C/de not_active Expired
-
1933
- 1933-10-30 US US695899A patent/US2034339A/en not_active Expired - Lifetime
- 1933-11-03 GB GB30580/33A patent/GB405596A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2773825A (en) * | 1944-04-28 | 1956-12-11 | Frank A Newcombe | Electrolysis apparatus |
US2582661A (en) * | 1945-12-03 | 1952-01-15 | Pechiney Prod Chimiques Sa | Method for electrolytically refining aluminum |
US2528905A (en) * | 1947-09-08 | 1950-11-07 | Alais & Froges & Camarque Cie | Construction of the lower portion of igneous electrolytic cells |
US2824057A (en) * | 1950-08-12 | 1958-02-18 | Aluminum Co Of America | Electrolytic reduction cell for producing aluminum |
US3386908A (en) * | 1963-12-04 | 1968-06-04 | Pechiney Prod Chimiques Sa | Cell for refining aluminum by fusion electrolysis |
US9932681B2 (en) | 2012-01-20 | 2018-04-03 | Saint-Gobain Centre De Recherches Et D'etudes Europeen | Electrolytic cell |
US10407786B2 (en) | 2015-02-11 | 2019-09-10 | Alcoa Usa Corp. | Systems and methods for purifying aluminum |
Also Published As
Publication number | Publication date |
---|---|
GB405596A (en) | 1934-02-08 |
DE600555C (de) | 1934-07-25 |
NL37494C (sv) | |
BE399344A (sv) | |
FR759588A (fr) | 1934-02-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2034339A (en) | Refining of aluminum | |
US20070215483A1 (en) | Method for electrolytic production and refining of metals | |
US2148404A (en) | Production of alkali metals | |
JP5183498B2 (ja) | ケイ素の電解製造及び精練方法 | |
US3219561A (en) | Dual cell refining of silicon and germanium | |
GB224488A (en) | Improvements in or relating to electrolytic methods of refining or reduction | |
US2923671A (en) | Copper electrodeposition process and anode for use in same | |
US3464900A (en) | Production of aluminum and aluminum alloys from aluminum chloride | |
US1937509A (en) | Method of making beryllium and light alloys thereof | |
US2119936A (en) | Method of recovering pure copper from scrap and residues | |
US1854684A (en) | Production of aluminum | |
US1567318A (en) | Method of making metallic magnesium | |
US1466126A (en) | Electrolytic refining or depositing of tin | |
US2245505A (en) | Process for replenishing and correcting the electrolyte in the refining of aluminum | |
US3503857A (en) | Method for producing magnesium ferrosilicon | |
US2431723A (en) | Electrolytic method for producing magnesium alloys | |
US2950236A (en) | Electrolytic production of magnesium metal | |
US2552423A (en) | Process for the direct production of refined aluminum | |
US1709759A (en) | Process of producing aluminum | |
US2880151A (en) | Electrolytic production of magnesium metal | |
US2582661A (en) | Method for electrolytically refining aluminum | |
US2305133A (en) | Anode | |
US2214331A (en) | Electrodeposition of zinc | |
US1948235A (en) | Electrolytic manufacture of iron and its alloys | |
US1957283A (en) | Electrolytic vat |