GB885635A - Electrolytic production of saturated fluoro-carbons - Google Patents

Electrolytic production of saturated fluoro-carbons

Info

Publication number
GB885635A
GB885635A GB15852/60A GB1585260A GB885635A GB 885635 A GB885635 A GB 885635A GB 15852/60 A GB15852/60 A GB 15852/60A GB 1585260 A GB1585260 A GB 1585260A GB 885635 A GB885635 A GB 885635A
Authority
GB
United Kingdom
Prior art keywords
carbons
anode
cathode
molten
calcium fluoride
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
GB15852/60A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB885635A publication Critical patent/GB885635A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
    • C22B26/20—Obtaining alkaline earth metals or magnesium
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B3/00—Electrolytic production of organic compounds
    • C25B3/20—Processes
    • C25B3/27—Halogenation
    • C25B3/28—Fluorination
    • 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
    • C25C3/02—Electrolytic production, recovery or refining of metals by electrolysis of melts of alkali 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
    • C25C3/08—Cell construction, e.g. bottoms, walls, cathodes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Geology (AREA)
  • Manufacturing & Machinery (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Electrolytic Production Of Metals (AREA)

Abstract

885,635. Preparing fluoro-carbons and calcium metal. DU PONT DE NEMOURS & CO., E.I. May 5, 1960 [May 8, 1959], No. 15852/60. Class 41. Saturated fluoro-carbons are made by electrolysing molten calcium fluoride in O-free conditions with a carbon anode and molten tin or tin alloy as cathode on which metallic calcium is deposited. An inert gas is used, temperatures of 1400‹ to 1600‹ C. and a voltage under 15 v. and preferably less than 10 v. Tin alloys, with Al, Bi, Si, Pb in monor amounts may be used as cathode. In a suitable apparatus, a cylindrical chamber 10 of stainless steel or alumina, contains a graphite crucible 15, holding the molten tin cathode 16 which may be confined by a retainer ring of boron nitride 17. A water-cooled brass lid 11 is provided with an inlet 12 and outlet 13 for an inert gas, and an anode assembly consisting of a consumable carbon tube anode 20, supported in bushings 21 of P.T.F.E., and an inner electrode 22 of graphite or tungsten. The graphite crucible is protected from corrosion by a " skull " of solid calcium fluoride 25, having an outer cooling jacket. The gases evolved through a port A are cooled in liquid nitrogen, and consist of 60 to 90 mols. per cent of carbon tetrafluoride mixed with minor amounts of hexafluor-ethane, silicon fluorides, and traces of CO 2 and other fluoro-carbons. In an alternative apparatus, the carbon tube anode 20 ends above the level of molten calcium fluoride and is provided with a cylindrical shield made of boron nitride, of wider diameter than the anode tube and projects downwards through the electrolyte and into the molten tin cathode. The calcium fluoride used should be dry, free of oxides, and in powder form. U.S.A. Specification 1,552,143 is referred to.
GB15852/60A 1959-05-08 1960-05-05 Electrolytic production of saturated fluoro-carbons Expired GB885635A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US885635XA 1959-05-08 1959-05-08

Publications (1)

Publication Number Publication Date
GB885635A true GB885635A (en) 1961-12-28

Family

ID=22212097

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15852/60A Expired GB885635A (en) 1959-05-08 1960-05-05 Electrolytic production of saturated fluoro-carbons

Country Status (3)

Country Link
DE (1) DE1136993B (en)
FR (1) FR1257313A (en)
GB (1) GB885635A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103820817A (en) * 2014-01-17 2014-05-28 饶云福 Inner-cooling inert anode for electrolytic aluminum

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US785961A (en) * 1903-09-16 1905-03-28 John A Lyons Manufacture of carbon-tetrafluorid gas.
US2835711A (en) * 1955-07-18 1958-05-20 Gen Electric Preparation of fluorocarbons and chlorofluorocarbons

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103820817A (en) * 2014-01-17 2014-05-28 饶云福 Inner-cooling inert anode for electrolytic aluminum

Also Published As

Publication number Publication date
DE1136993B (en) 1962-09-27
FR1257313A (en) 1961-03-31

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