ES276075A1 - A method of recovering criolite from the interior coating of an electrolytic cell (Machine-translation by Google Translate, not legally binding) - Google Patents

A method of recovering criolite from the interior coating of an electrolytic cell (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES276075A1
ES276075A1 ES276075A ES276075A ES276075A1 ES 276075 A1 ES276075 A1 ES 276075A1 ES 276075 A ES276075 A ES 276075A ES 276075 A ES276075 A ES 276075A ES 276075 A1 ES276075 A1 ES 276075A1
Authority
ES
Spain
Prior art keywords
sodium
cryolite
translation
recovering
legally binding
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
ES276075A
Other languages
Spanish (es)
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
Aluminium Laboratories 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 Aluminium Laboratories Ltd filed Critical Aluminium Laboratories Ltd
Publication of ES276075A1 publication Critical patent/ES276075A1/en
Expired legal-status Critical Current

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
    • C25C3/18—Electrolytes
    • 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
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/08—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom by treating aluminous minerals with sodium carbonate, e.g. sinter processes
    • 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)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

A method of recovering cryolite from the carbonaceous inner lining of an electrolytic cell used in aluminum electrolytic refining, which comprises reacting the interior lining material of the cryolite-containing cell with added water-soluble carbonate selected from the group consisting of sodium carbonate and sodium bicarbonate at an elevated temperature and for a period of time sufficient for substantially all of the cryolite to react with said carbonate with the resulting formation of sodium fluoride and sodium aluminate in accordance with the chemical equation Na3AlF6 + 2Na2CO3 → 6 NaF + NaAlO2 + 2CO2 contacting the resulting reaction mixture, which contains sodium fluoride and sodium aluminate, with an aqueous solution to dissolve said sodium fluoride and said sodium aluminate therefrom and react the resulting aqueous solution with carbon dioxide to precipitate cryolite therefrom. (Machine-translation by Google Translate, not legally binding)
ES276075A 1961-04-03 1962-04-02 A method of recovering criolite from the interior coating of an electrolytic cell (Machine-translation by Google Translate, not legally binding) Expired ES276075A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US100268A US3106448A (en) 1961-04-03 1961-04-03 Recovery of cryolite

Publications (1)

Publication Number Publication Date
ES276075A1 true ES276075A1 (en) 1962-07-16

Family

ID=22278904

Family Applications (1)

Application Number Title Priority Date Filing Date
ES276075A Expired ES276075A1 (en) 1961-04-03 1962-04-02 A method of recovering criolite from the interior coating of an electrolytic cell (Machine-translation by Google Translate, not legally binding)

Country Status (6)

Country Link
US (1) US3106448A (en)
CH (1) CH409417A (en)
DE (1) DE1207362B (en)
ES (1) ES276075A1 (en)
GB (1) GB981243A (en)
SE (1) SE310658B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112624101A (en) * 2020-12-23 2021-04-09 河南省冶金研究所有限责任公司 Process for wet treatment of electrolytic aluminum waste cathode material
CN113426808A (en) * 2021-06-29 2021-09-24 云南云铝润鑫铝业有限公司 Method for recovering fluoride salt from aluminum electrolysis overhaul residues through pressurized alkaline leaching

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1269677A (en) * 1960-07-04 1961-08-18 Electrochimie Soc Fluorine recovery process
US3512927A (en) * 1965-07-26 1970-05-19 Anson G Betts Chemically treating phosphorite and obtaining separate products of fluorine and of phosphorus
US4113831A (en) * 1975-10-02 1978-09-12 National Fluoride And Chemical Corporation Recovery of sodium fluoride and other chemicals from spent carbon liners
GB8301974D0 (en) * 1983-01-25 1983-02-23 Alcan Int Ltd Aluminium fluoride from scrap
US4889695A (en) * 1985-02-20 1989-12-26 Aluminum Company Of America Reclaiming spent potlining
US4597953A (en) * 1985-02-20 1986-07-01 Aluminum Company Of America Halogen recovery
US5164174A (en) * 1991-10-11 1992-11-17 Reynolds Metals Company Detoxification of aluminum spent potliner by thermal treatment, lime slurry quench and post-kiln treatment
US5776426A (en) * 1992-07-24 1998-07-07 Comalco Aluminium Limited Treatment of solid material containing fluoride and sodium including mixing with caustic liquor and lime
CN104499000A (en) * 2014-12-12 2015-04-08 平顶山华兴浮选工程技术服务有限公司 Beneficiation treatment method for electrolytic aluminium carbon residues
CN106077040B (en) * 2016-06-30 2019-01-15 中南大学 A kind of method of ultrasonic wave auxiliary alkali leaching process aluminum electrolytic waste and old cathode carbon block
CN106086938B (en) * 2016-06-30 2019-01-04 中南大学 A kind of method that electrolyte in aluminium electroloysis waste lining is recycled in the leaching of ultrasonic wave auxiliary pressurized alkali
CN113426807B (en) * 2021-06-29 2022-05-17 云南云铝润鑫铝业有限公司 Method for combined treatment and comprehensive utilization of resources of dangerous waste residues generated in aluminum electrolysis
CN114074949B (en) * 2021-10-18 2023-06-27 郑州大学 Catalytic dissociation method for fluoride in waste material of electrolytic tank
CN115536050A (en) * 2022-11-02 2022-12-30 中南大学 Process method for preparing cryolite by aluminum ash recombination

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1871723A (en) * 1929-05-29 1932-08-16 Aluminum Co Of America Process for the recovery of cryolite
DE679849C (en) * 1936-11-17 1939-08-15 Ruetgerswerke Akt Ges Production of aluminum-fluorine compounds from used furnace feed from the aluminum electrolysis smelting furnace
US2196077A (en) * 1937-06-25 1940-04-02 Aluminum Co Of America Method of producing sodium aluminum fluoride
US2567544A (en) * 1945-01-26 1951-09-11 Alcan Aluminium Ltd Process for the manufacture of sodium aluminum fluoride
US2732283A (en) * 1951-02-23 1956-01-24 O minutes
DE925407C (en) * 1952-10-26 1955-03-21 Vaw Ver Aluminium Werke Ag Process for the production of cryolite from materials containing aluminum and fluorine compounds
CH319303A (en) * 1952-11-26 1957-02-15 Vaw Ver Aluminium Werke Ag Process for recovering cryolite from the coal floor of electrolytic furnaces

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112624101A (en) * 2020-12-23 2021-04-09 河南省冶金研究所有限责任公司 Process for wet treatment of electrolytic aluminum waste cathode material
CN113426808A (en) * 2021-06-29 2021-09-24 云南云铝润鑫铝业有限公司 Method for recovering fluoride salt from aluminum electrolysis overhaul residues through pressurized alkaline leaching
CN113426808B (en) * 2021-06-29 2022-05-17 云南云铝润鑫铝业有限公司 Method for recovering fluoride salt from aluminum electrolysis overhaul residues through pressurized alkaline leaching

Also Published As

Publication number Publication date
DE1207362B (en) 1965-12-23
CH409417A (en) 1966-03-15
GB981243A (en) 1965-01-20
US3106448A (en) 1963-10-08
SE310658B (en) 1969-05-12

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