GB1416344A - Method of recovering fluorine from aluminium reduction cell waste gases - Google Patents

Method of recovering fluorine from aluminium reduction cell waste gases

Info

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
Application number
GB774572A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcan Research and Development Ltd
Original Assignee
Alcan Research and Development Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alcan Research and Development Ltd filed Critical Alcan Research and Development Ltd
Priority to GB774572A priority Critical patent/GB1416344A/en
Priority to IT1983873A priority patent/IT978653B/en
Priority to DE19732307275 priority patent/DE2307275B2/en
Priority to CA163,855A priority patent/CA992725A/en
Priority to FR7305589A priority patent/FR2172366A1/fr
Priority to JP48018428A priority patent/JPS4893593A/ja
Priority to SU1886541A priority patent/SU528854A3/en
Priority to CH228173A priority patent/CH562332A5/xx
Priority to ES411751A priority patent/ES411751A1/en
Publication of GB1416344A publication Critical patent/GB1416344A/en
Expired legal-status Critical Current

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.
GB774572A 1972-02-18 1972-02-18 Method of recovering fluorine from aluminium reduction cell waste gases Expired GB1416344A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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.

Cited By (14)

* Cited by examiner, † Cited by third party
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