GB1375476A – – Google Patents
GB1375476A – – Google Patents
Info
Publication number
GB1375476A
GB1375476A
GB3414372A
GB3414372A
GB1375476A
GB 1375476 A
GB1375476 A
GB 1375476A
GB 3414372 A
GB3414372 A
GB 3414372A
GB 3414372 A
GB3414372 A
GB 3414372A
GB 1375476 A
GB1375476 A
GB 1375476A
Authority
GB
United Kingdom
Prior art keywords
fumes
alumina
fluoride
filter
july
Prior art date
1971-07-22
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
GB3414372A
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.)
1971-07-22
Filing date
1972-07-21
Publication date
1974-11-27
1972-07-21
Application filed
filed
Critical
1974-11-27
Publication of GB1375476A
publication
Critical
patent/GB1375476A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
C25C3/22—Collecting emitted gases
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
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
Abstract
1375476 Dry – scrubbing fluoride fumes ARDAL OG SUNNDAL VERK AS 21 July 1972 [22 July 1971] 34143/72 Headings B1L and BIT [Also in Division Cl] Flouride- and sulphur-containing fumes from aluminium electrolytic cells are filtered and dry-scrubbed for selective removal of fluoride. Alumina is added to the fumes for reaction with fluorides present and is then removed by filtration in one or more filter units, the alumina being added not more than one metre upstream of the filter units or in each filter unit itself such as to give a contact time which means that fluoride is selectively absorbed. The alumina used contains a low content of alpha crystals and is reactive to fluoride. In the embodiment of Fig. 2 a number of bag filters 7 are mounted in a housing with fumes inlet 6 and filter fumes outlet 10. Alumina is dispensed from tubes 8 and falls in counter-current to the fumes. An outlet 9 is provided for the alumina.
GB3414372A
1971-07-22
1972-07-21
Expired
GB1375476A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
NO280271A
NO126628B
(en)
1971-07-22
1971-07-22
Publications (1)
Publication Number
Publication Date
GB1375476A
true
GB1375476A
(en)
1974-11-27
Family
ID=19879155
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3414372A
Expired
GB1375476A
(en)
1971-07-22
1972-07-21
Country Status (11)
Country
Link
JP
(1)
JPS49107958A
(en)
AU
(1)
AU4472472A
(en)
BR
(1)
BR7204898D0
(en)
CA
(1)
CA965223A
(en)
DE
(1)
DE2236030A1
(en)
FR
(1)
FR2146505B3
(en)
GB
(1)
GB1375476A
(en)
IS
(1)
IS2090A7
(en)
IT
(1)
IT961645B
(en)
NL
(1)
NL7210074A
(en)
NO
(1)
NO126628B
(en)
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4176019A
(en)
*
1977-03-10
1979-11-27
Ardal Og Sunndal Verk A.S.
Process and apparatus for treatment of waste gases
CN102485963A
(en)
*
2010-12-02
2012-06-06
沈阳铝镁设计研究院有限公司
Structure for controlling wind pressure balance of aluminium electrolysis-based purification flue gas pipeline
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
SE467952B
(en)
*
1990-04-27
1992-10-12
Flaekt Ab
SET AND DEVICE TO INCREASE THE EXTENSION OF USE FOR A DRY SORBENT
IS3896A
(en)
*
1991-08-07
1993-02-08
Comalco Aluminium Limited
Purification of gaseous fluorides from industrial emissions
TW279242B
(en)
*
1994-11-29
1996-06-21
Asahi Denka Kogyo Kk
The wasted-gas processing method & device for CVD apparatus
1971
1971-07-22
NO
NO280271A
patent/NO126628B/no
unknown
1972
1972-07-17
IS
IS2090A
patent/IS2090A7/en
unknown
1972-07-19
AU
AU44724/72A
patent/AU4472472A/en
not_active
Expired
1972-07-20
NL
NL7210074A
patent/NL7210074A/xx
unknown
1972-07-21
FR
FR7226501A
patent/FR2146505B3/fr
not_active
Expired
1972-07-21
IT
IT5168772A
patent/IT961645B/en
active
1972-07-21
BR
BR489872A
patent/BR7204898D0/en
unknown
1972-07-21
JP
JP47072623A
patent/JPS49107958A/ja
active
Pending
1972-07-21
GB
GB3414372A
patent/GB1375476A/en
not_active
Expired
1972-07-21
CA
CA147,698A
patent/CA965223A/en
not_active
Expired
1972-07-22
DE
DE19722236030
patent/DE2236030A1/en
active
Pending
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4176019A
(en)
*
1977-03-10
1979-11-27
Ardal Og Sunndal Verk A.S.
Process and apparatus for treatment of waste gases
CN102485963A
(en)
*
2010-12-02
2012-06-06
沈阳铝镁设计研究院有限公司
Structure for controlling wind pressure balance of aluminium electrolysis-based purification flue gas pipeline
Also Published As
Publication number
Publication date
IS2090A7
(en)
1972-08-23
BR7204898D0
(en)
1973-05-15
JPS49107958A
(en)
1974-10-14
AU4472472A
(en)
1974-02-07
NL7210074A
(en)
1973-01-24
NO126628B
(en)
1973-03-05
FR2146505B3
(en)
1975-09-05
CA965223A
(en)
1975-04-01
DE2236030A1
(en)
1973-02-01
IT961645B
(en)
1973-12-10
FR2146505A1
(en)
1973-03-02
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Legal Events
Date
Code
Title
Description
1975-03-19
414F
Notice of opposition given (sect. 14/1949)
1975-04-23
414E
Application relinquished (sect. 14/1949)
1975-08-06
CSNS
Application of which complete specification have been accepted and published, but patent is not sealed
