GB1416344A - Method of recovering fluorine from aluminium reduction cell waste gases - Google Patents
Method of recovering fluorine from aluminium reduction cell waste gasesInfo
- Publication number
- GB1416344A GB1416344A GB774572A GB774572A GB1416344A GB 1416344 A GB1416344 A GB 1416344A GB 774572 A GB774572 A GB 774572A GB 774572 A GB774572 A GB 774572A GB 1416344 A GB1416344 A GB 1416344A
- Authority
- GB
- United Kingdom
- Prior art keywords
- particles
- alumina
- waste gas
- separation
- aluminium
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Treating Waste Gases (AREA)
- Electrolytic Production Of Metals (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
1416344 Recovering fluorine values from waste gas ALCAN RESEARCH & DEVELOPMENT Ltd 30 Jan 1973 [18 Feb 1972] 7745/72 Heading C1A Fluorine values are recovered from the waste gas from an electrolytic reduction cell for the production of aluminium by entraining alumina particles in a stream of the waste gas for a contact time sufficient to react with 90% of the HF therein, separating a major proportion of the alumina above a predetermined size in a first separation stage and the minor remaining proportion of fine alumina particles in a second separation stage, the preselected size being such that the larger particles contain less than 0À1% by weight of benzene-soluble tar. The alumina preferably has an average particle size of 50- 100 microns, not more than 10% being less than 40 microns. Preferably the finest particles of the second separation, containing a high proportion of iron particles, are separated, and the remainder heated, e.g. to 500-600‹ C. to reduce the carbon content and supplied with the coarser particles, to the aluminium cells: the exhaust gas from the heat-treatment may be recycled to the stream of waste gases between the separation stages, additional alumina being supplied at the same point.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB774572A GB1416344A (en) | 1972-02-18 | 1972-02-18 | Method of recovering fluorine from aluminium reduction cell waste gases |
IT1983873A IT978653B (en) | 1972-02-18 | 1973-01-31 | METHOD FOR THE RECOVERY OF FLUORIDE FROM EXHAUST GAS OF ALUMINUM REDUCTION |
DE19732307275 DE2307275B2 (en) | 1972-02-18 | 1973-02-14 | PROCESS FOR RECOVERING THE FLUORINE VALUES FROM THE EXHAUST GAS OF AN ELECTROLYTIC REDUCTION CELL FOR THE PRODUCTION OF ALUMINUM |
CA163,855A CA992725A (en) | 1972-02-18 | 1973-02-16 | Method of recovering fluorine from aluminium reduction cell waste gases |
FR7305589A FR2172366A1 (en) | 1972-02-18 | 1973-02-16 | |
JP48018428A JPS4893593A (en) | 1972-02-18 | 1973-02-16 | |
SU1886541A SU528854A3 (en) | 1972-02-18 | 1973-02-16 | Gas cleaning method |
CH228173A CH562332A5 (en) | 1972-02-18 | 1973-02-16 | |
ES411751A ES411751A1 (en) | 1972-02-18 | 1973-02-17 | Method of recovering fluorine from aluminium reduction cell waste gases |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB774572A GB1416344A (en) | 1972-02-18 | 1972-02-18 | Method of recovering fluorine from aluminium reduction cell waste gases |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1416344A true GB1416344A (en) | 1975-12-03 |
Family
ID=9838916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB774572A Expired GB1416344A (en) | 1972-02-18 | 1972-02-18 | Method of recovering fluorine from aluminium reduction cell waste gases |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS4893593A (en) |
CA (1) | CA992725A (en) |
CH (1) | CH562332A5 (en) |
DE (1) | DE2307275B2 (en) |
ES (1) | ES411751A1 (en) |
FR (1) | FR2172366A1 (en) |
GB (1) | GB1416344A (en) |
IT (1) | IT978653B (en) |
SU (1) | SU528854A3 (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4382879A (en) * | 1980-02-04 | 1983-05-10 | Hitachi, Ltd. | Material for adsorbing iodine and method for preparing thereof |
US4525181A (en) * | 1981-02-05 | 1985-06-25 | Flakt Ab | Process for the removal of impurities in reacted alumina |
US4548797A (en) * | 1982-09-25 | 1985-10-22 | Metallgesellschaft Aktiengesellschaft | Process of removing pollutants from exhaust gases |
US5658544A (en) * | 1990-08-03 | 1997-08-19 | Comalco Aluminium Limited | Gas-solid contacting method |
CN1036506C (en) * | 1993-08-21 | 1997-11-26 | 石文杰 | Silica-gel removing and fluorine recovering method and apparatus |
US5718873A (en) * | 1993-11-16 | 1998-02-17 | Comalco Aluminium Limited | Countercurrent gas-solid contacting |
WO1998059094A1 (en) * | 1997-06-25 | 1998-12-30 | ABB Fläkt AB | Plant for removing fluor containing waste gases |
US5885539A (en) * | 1994-11-23 | 1999-03-23 | Abb Flakt Ab | Method for separating substances from a gaseous medium by dry adsorption |
WO2000015873A1 (en) * | 1998-09-17 | 2000-03-23 | ABB Fläkt AB | Method and device for a dry cleansing plant for aluminium reduction furnaces exhaust gas |
FR2848875A1 (en) * | 2002-12-18 | 2004-06-25 | Pechiney Aluminium | Method, for treating effluents from Hall Heroult electrolytic cell producing aluminum, involves injecting coolant droplets into effluent line upstream of reactor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7506339A (en) * | 1974-06-06 | 1975-12-09 | Hosokawa Micromeretics Lab Lim | METHOD AND DEVICE FOR DRY REMOVAL OF AIR-CARRIED EFFLUENT IN THE ALUMINUM PREPARATION. |
-
1972
- 1972-02-18 GB GB774572A patent/GB1416344A/en not_active Expired
-
1973
- 1973-01-31 IT IT1983873A patent/IT978653B/en active
- 1973-02-14 DE DE19732307275 patent/DE2307275B2/en active Pending
- 1973-02-16 FR FR7305589A patent/FR2172366A1/fr not_active Withdrawn
- 1973-02-16 SU SU1886541A patent/SU528854A3/en active
- 1973-02-16 JP JP48018428A patent/JPS4893593A/ja active Pending
- 1973-02-16 CA CA163,855A patent/CA992725A/en not_active Expired
- 1973-02-16 CH CH228173A patent/CH562332A5/xx not_active IP Right Cessation
- 1973-02-17 ES ES411751A patent/ES411751A1/en not_active Expired
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4382879A (en) * | 1980-02-04 | 1983-05-10 | Hitachi, Ltd. | Material for adsorbing iodine and method for preparing thereof |
US4525181A (en) * | 1981-02-05 | 1985-06-25 | Flakt Ab | Process for the removal of impurities in reacted alumina |
US4548797A (en) * | 1982-09-25 | 1985-10-22 | Metallgesellschaft Aktiengesellschaft | Process of removing pollutants from exhaust gases |
US5658544A (en) * | 1990-08-03 | 1997-08-19 | Comalco Aluminium Limited | Gas-solid contacting method |
CN1036506C (en) * | 1993-08-21 | 1997-11-26 | 石文杰 | Silica-gel removing and fluorine recovering method and apparatus |
US5718873A (en) * | 1993-11-16 | 1998-02-17 | Comalco Aluminium Limited | Countercurrent gas-solid contacting |
US5885539A (en) * | 1994-11-23 | 1999-03-23 | Abb Flakt Ab | Method for separating substances from a gaseous medium by dry adsorption |
WO1998059094A1 (en) * | 1997-06-25 | 1998-12-30 | ABB Fläkt AB | Plant for removing fluor containing waste gases |
US6406524B1 (en) | 1997-06-25 | 2002-06-18 | Abb Flakt Ab | Plant for removing fluor containing waste gases |
WO2000015873A1 (en) * | 1998-09-17 | 2000-03-23 | ABB Fläkt AB | Method and device for a dry cleansing plant for aluminium reduction furnaces exhaust gas |
AU768438B2 (en) * | 1998-09-17 | 2003-12-11 | General Electric Technology Gmbh | Method and device for a dry cleansing plant for aluminium reduction furnaces exhaust gas |
US6726020B1 (en) | 1998-09-17 | 2004-04-27 | ABB Fläkt AB | Method and device for a dry cleansing plant for aluminum reduction furnaces exhaust gas |
FR2848875A1 (en) * | 2002-12-18 | 2004-06-25 | Pechiney Aluminium | Method, for treating effluents from Hall Heroult electrolytic cell producing aluminum, involves injecting coolant droplets into effluent line upstream of reactor |
WO2004064984A1 (en) * | 2002-12-18 | 2004-08-05 | Aluminium Pechiney | Electrolytic cell effluent treatment method and device for the production of aluminium |
Also Published As
Publication number | Publication date |
---|---|
CA992725A (en) | 1976-07-13 |
ES411751A1 (en) | 1976-04-16 |
CH562332A5 (en) | 1975-05-30 |
IT978653B (en) | 1974-09-20 |
FR2172366A1 (en) | 1973-09-28 |
DE2307275A1 (en) | 1973-08-23 |
SU528854A3 (en) | 1976-09-15 |
JPS4893593A (en) | 1973-12-04 |
DE2307275B2 (en) | 1976-06-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |