NZ226108A - Process for regulating the acidity of an alumina-cryolite electrolyte cell in which fluorinated products emitted by hall-heroult electrolytic cells are recycled - Google Patents

Process for regulating the acidity of an alumina-cryolite electrolyte cell in which fluorinated products emitted by hall-heroult electrolytic cells are recycled

Info

Publication number
NZ226108A
NZ226108A NZ226108A NZ22610888A NZ226108A NZ 226108 A NZ226108 A NZ 226108A NZ 226108 A NZ226108 A NZ 226108A NZ 22610888 A NZ22610888 A NZ 22610888A NZ 226108 A NZ226108 A NZ 226108A
Authority
NZ
New Zealand
Prior art keywords
alumina
fluorinated
acidity
reference value
storage means
Prior art date
Application number
NZ226108A
Other languages
English (en)
Inventor
Jean-Luc Basquin
Benoit Sulmont
Original Assignee
Pechiney Aluminium
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9355397&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NZ226108(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Pechiney Aluminium filed Critical Pechiney Aluminium
Publication of NZ226108A publication Critical patent/NZ226108A/en

Links

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
    • C25C3/20—Automatic control or regulation of cells
    • 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

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)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
NZ226108A 1987-09-18 1988-09-09 Process for regulating the acidity of an alumina-cryolite electrolyte cell in which fluorinated products emitted by hall-heroult electrolytic cells are recycled NZ226108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8713543A FR2620738B1 (fr) 1987-09-18 1987-09-18 Procede de regulation de l'acidite du bain d'electrolyse par recyclage des produits fluores emis par les cuves d'electrolyse hall-heroult

Publications (1)

Publication Number Publication Date
NZ226108A true NZ226108A (en) 1991-04-26

Family

ID=9355397

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ226108A NZ226108A (en) 1987-09-18 1988-09-09 Process for regulating the acidity of an alumina-cryolite electrolyte cell in which fluorinated products emitted by hall-heroult electrolytic cells are recycled

Country Status (9)

Country Link
US (1) US4867851A (https=)
AU (1) AU605448B2 (https=)
BR (1) BR8804796A (https=)
CA (1) CA1329789C (https=)
DE (1) DE3830769A1 (https=)
FR (1) FR2620738B1 (https=)
NO (1) NO173026B (https=)
NZ (1) NZ226108A (https=)
SA (1) SA89100034B1 (https=)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59105830D1 (de) * 1990-05-04 1995-08-03 Alusuisse Lonza Services Ag Regulierung und Stabilisierung des A1F3-Gehaltes in einer Aluminiumelektrolysezelle.
US5942097A (en) * 1997-12-05 1999-08-24 The Ohio State University Method and apparatus featuring a non-consumable anode for the electrowinning of aluminum
DE19805619C2 (de) * 1998-02-12 2002-08-01 Heraeus Electro Nite Int Verfahren zur Regelung des AlF¶3¶-Gehaltes in Kryolithschmelzen
US6837982B2 (en) * 2002-01-25 2005-01-04 Northwest Aluminum Technologies Maintaining molten salt electrolyte concentration in aluminum-producing electrolytic cell
US7255783B2 (en) * 2003-08-21 2007-08-14 Alcoa Inc. Use of infrared imaging to reduce energy consumption and fluoride consumption
US12509788B2 (en) 2019-03-20 2025-12-30 Elysis Limited Partnership System and method for collecting and pre-treating process gases generated by an electrolysis cell

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE628401A (https=) * 1962-02-15
US3760565A (en) * 1971-07-19 1973-09-25 Aluminum Co Of America Anti-pollution method
SE362901B (https=) * 1971-10-27 1973-12-27 Svenska Flaektfabriken Ab
US3823078A (en) * 1972-12-14 1974-07-09 Reynolds Int Inc Production of fluidized alumina reduction cell feed
US4053375A (en) * 1976-07-16 1977-10-11 Dorr-Oliver Incorporated Process for recovery of alumina-cryolite waste in aluminum production
US4062696A (en) * 1976-07-27 1977-12-13 Kaiser Aluminum & Chemical Corporation Purification of contaminated alumina scavengers of aluminum reduction cell effluent dry scrubber systems
GB1571222A (en) * 1977-03-10 1980-07-09 Ardal Og Sunndal Verk Process and apparatus for treatment of waste gases
GB2029860B (en) * 1978-09-07 1983-03-09 Alcan Res & Dev Measurement of metal fluoride contents of electrolyte in electrolytic reduction cells for alluminium production
EP0195142B1 (en) * 1985-03-18 1988-09-07 Alcan International Limited Controlling alf 3 addition to al reduction cell electrolyte

Also Published As

Publication number Publication date
FR2620738B1 (fr) 1989-11-24
AU605448B2 (en) 1991-01-10
BR8804796A (pt) 1989-04-25
SA89100034B1 (ar) 1999-06-07
FR2620738A1 (fr) 1989-03-24
AU2235988A (en) 1989-03-23
DE3830769C2 (https=) 1990-01-18
NO173026B (no) 1993-07-05
DE3830769A1 (de) 1989-04-06
NO884061L (no) 1989-03-20
CA1329789C (fr) 1994-05-24
NO884061D0 (no) 1988-09-13
US4867851A (en) 1989-09-19

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