AT69884B - Process for the production of alkali metal by electrolysis of molten salts or salt mixtures. - Google Patents

Process for the production of alkali metal by electrolysis of molten salts or salt mixtures.

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Publication number
AT69884B
AT69884B AT69884DA AT69884B AT 69884 B AT69884 B AT 69884B AT 69884D A AT69884D A AT 69884DA AT 69884 B AT69884 B AT 69884B
Authority
AT
Austria
Prior art keywords
electrolysis
alkali metal
production
salt mixtures
molten salts
Prior art date
Application number
Other languages
German (de)
Inventor
Robert Joseph Mc Nitt
Original Assignee
Robert Joseph Mc Nitt
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 Robert Joseph Mc Nitt filed Critical Robert Joseph Mc Nitt
Application granted granted Critical
Publication of AT69884B publication Critical patent/AT69884B/en

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  • Manufacture And Refinement Of Metals (AREA)

Description

  

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    Verfahren zur Herstellung von Alkalimetall durch Elektrolyse schmelzflüssiger Salze oder Salzgemische.   
 EMI1.1 
   niedrigeren Schmelzpunkt   besitzen, als wie die reinen Chloride. Durch diesen Kunstgriff rückte die billigere Darstellung der Alkalimetalle   aus Chloriden allmählich   in den Bereich   der Möglichkeit.   aber selbst einen einwandfreien Apparat vorausgesetzt, blieb die Ausbeute an Metall immer sehr erheblich hinter der theoretischen Ausbeute zurück. Zur Erklärung der schlechten Ausbeuten hat man verschiedene mehr oder weniger zutreffende Theorien aufgestellt, welche aber zu einer praktisch brauchbaren Lösung des Problems nicht führten.

   Selbst bei Verwendung von eutektischen   Salzgemischen   kommt man mit der Elektrolysiertemperatur   doch nicht wesentlich unter 600"C   herunter. Da aber bei dieser Temperatur die Alkalimetalle schon immerhin eine erhebliche Dampfspannung und damit eine erhebliche Tendenz zur Metallnebelbildung   haben, so werden die   Bedingungen auch   durch Anwendung   von Gemischen kaum vereinfacht. 



     Es wurde   nun ein Verfahren gefunden, nach welchem es gelingt, die Alkalimetalle aus ihren Chloriden bzw. aus Salzgemischen mit vorgüglichen Ausbeuten abzuscheiden. Das Charakterstische dieses Verfahrens besteht darin, dass die Elektrolysierzone unter Druck gesetzt wird, so dass der Siedepunkt des   Alkalimetalles sich nach oben verschiebt.   Der erforderliche Druck kann z. B. derart 
 EMI1.2 
 an den Boden des Apparatus gelegt wird; es steht also diesem Falle die Arbeitszone unter hydrostatischem Druck. 
 EMI1.3 
 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



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    Process for the production of alkali metal by electrolysis of molten salts or salt mixtures.
 EMI1.1
   have a lower melting point than the pure chlorides. With this trick, the cheaper preparation of the alkali metals from chlorides gradually moved into the realm of possibility. but even assuming that the apparatus was in perfect working order, the metal yield was always very considerably below the theoretical yield. Various more or less correct theories have been put forward to explain the poor yields, but these have not led to a practically useful solution to the problem.

   Even with the use of eutectic salt mixtures, the electrolysis temperature does not go significantly below 600 ° C. But since at this temperature the alkali metals already have a considerable vapor tension and thus a considerable tendency to form metal mist, the conditions are also met by using mixtures hardly simplified.



     A process has now been found by which it is possible to separate the alkali metals from their chlorides or from salt mixtures with excellent yields. The characteristic of this process is that the electrolysis zone is pressurized so that the boiling point of the alkali metal shifts upwards. The required pressure can e.g. B. like this
 EMI1.2
 is placed on the bottom of the apparatus; so in this case the working zone is under hydrostatic pressure.
 EMI1.3
 

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

**WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT69884D 1913-01-02 1913-12-15 Process for the production of alkali metal by electrolysis of molten salts or salt mixtures. AT69884B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69884XA 1913-01-02 1913-01-02

Publications (1)

Publication Number Publication Date
AT69884B true AT69884B (en) 1915-09-10

Family

ID=21723605

Family Applications (1)

Application Number Title Priority Date Filing Date
AT69884D AT69884B (en) 1913-01-02 1913-12-15 Process for the production of alkali metal by electrolysis of molten salts or salt mixtures.

Country Status (1)

Country Link
AT (1) AT69884B (en)

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