GB1027362A - Process of recovering fluorine, sodium, and aluminium compounds from wastes from aluminium furnaces - Google Patents
Process of recovering fluorine, sodium, and aluminium compounds from wastes from aluminium furnacesInfo
- Publication number
- GB1027362A GB1027362A GB37995/63A GB3799563A GB1027362A GB 1027362 A GB1027362 A GB 1027362A GB 37995/63 A GB37995/63 A GB 37995/63A GB 3799563 A GB3799563 A GB 3799563A GB 1027362 A GB1027362 A GB 1027362A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cryolite
- solution
- aluminium
- wastes
- furnaces
- 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
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/48—Halides, with or without other cations besides aluminium
- C01F7/50—Fluorides
- C01F7/54—Double compounds containing both aluminium and alkali metals or alkaline-earth metals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Electrolytic Production Of Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
- Removal Of Specific Substances (AREA)
Abstract
Cryolite is precipitated in two stages which may be continuous from the alkaline (e.g. NaOH) back solution of furnace wastes from the melt electrolysis of Al2O3 in molten cryolite, in the first stage from a basic solution using an HF-containing solution and then from an acid solution using an AlF3-containing solution. The first precipitation is done preferably at pH 7.5-13 by adding tower acid, i.e. the aqueous liquid from washing waste gases from electrolytic Al production furnaces. After removal of cryolite, the mother liquor contains a large amount of NaF which is precipitated in the second stage as cryolite preferably at a pH 2-6.5 using tower acid to which has been added Al(OH)3 to form AlF3. The residual mother liquor is separated from the cryolite and may be recycled to the leaching process, preferably after CO2 stripping, with addition of further NaOH. The precipitating agents may be added in a continuous stream to a continuous stream of leach solution. The pH may be controlled by conventional means.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO14605862 | 1962-10-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1027362A true GB1027362A (en) | 1966-04-27 |
Family
ID=19908710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB37995/63A Expired GB1027362A (en) | 1962-10-11 | 1963-09-26 | Process of recovering fluorine, sodium, and aluminium compounds from wastes from aluminium furnaces |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | USRE26645E (en) |
| CH (1) | CH428687A (en) |
| DE (1) | DE1467265A1 (en) |
| ES (1) | ES291558A1 (en) |
| FR (1) | FR1371110A (en) |
| GB (1) | GB1027362A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4508689A (en) * | 1983-07-21 | 1985-04-02 | Aluminum Company Of America | Aluminum-fluorine compound manufacture |
| CN114057239B (en) * | 2021-12-16 | 2023-05-30 | 中国长江三峡集团有限公司 | Preparation method of alkaline-water-washed high-nickel ternary precursor |
-
1963
- 1963-09-11 ES ES291558A patent/ES291558A1/en not_active Expired
- 1963-09-12 DE DE19631467265 patent/DE1467265A1/en active Pending
- 1963-09-26 GB GB37995/63A patent/GB1027362A/en not_active Expired
- 1963-09-27 CH CH1192763A patent/CH428687A/en unknown
- 1963-10-11 FR FR950347A patent/FR1371110A/en not_active Expired
-
1968
- 1968-11-29 US US26645D patent/USRE26645E/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1467265A1 (en) | 1969-01-23 |
| USRE26645E (en) | 1969-08-19 |
| ES291558A1 (en) | 1963-12-01 |
| CH428687A (en) | 1967-01-31 |
| FR1371110A (en) | 1964-08-28 |
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