GB463092A - Improvements in the manufacture and production of cryolite - Google Patents

Improvements in the manufacture and production of cryolite

Info

Publication number
GB463092A
GB463092A GB46436A GB46436A GB463092A GB 463092 A GB463092 A GB 463092A GB 46436 A GB46436 A GB 46436A GB 46436 A GB46436 A GB 46436A GB 463092 A GB463092 A GB 463092A
Authority
GB
United Kingdom
Prior art keywords
alumina
caustic soda
ammonium fluoride
solution
ammonia
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
GB46436A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB46436A priority Critical patent/GB463092A/en
Publication of GB463092A publication Critical patent/GB463092A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (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)

Abstract

Cryolite or double salts of similar composition are obtained by reacting ammonium fluoride with alumina in the presence of aqueous caustic soda solution. The alumina may be first dissolved in the caustic soda and the solution be introduced into a solution of ammonium fluoride with stirring, or both solutions may be introduced at the same time into the reaction vessel. Technical aluminate solutions, with addition if necessary of caustic soda may be used in the process. Excess of alumina should be avoided. The heat of the reaction suffices to expel most of the ammonia liberated, and residual ammonia may be removed by heating to 80--90 DEG C. Ammonium fluoride for use in the process may be obtained by treating siliceous fluorspar with sulphuric acid, absorbing the liberated hydrofluoric acid in ammonia recovered from the process and filtering off the silicic acid precipitated.
GB46436A 1936-01-06 1936-01-06 Improvements in the manufacture and production of cryolite Expired GB463092A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB46436A GB463092A (en) 1936-01-06 1936-01-06 Improvements in the manufacture and production of cryolite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB46436A GB463092A (en) 1936-01-06 1936-01-06 Improvements in the manufacture and production of cryolite

Publications (1)

Publication Number Publication Date
GB463092A true GB463092A (en) 1937-03-22

Family

ID=9704798

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46436A Expired GB463092A (en) 1936-01-06 1936-01-06 Improvements in the manufacture and production of cryolite

Country Status (1)

Country Link
GB (1) GB463092A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2597302A (en) * 1947-07-28 1952-05-20 Ardal Verk As Process for utilization of the gas washing lye from aluminum electrolysis in cryolite production

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2597302A (en) * 1947-07-28 1952-05-20 Ardal Verk As Process for utilization of the gas washing lye from aluminum electrolysis in cryolite production

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