AT69137B - Process for the electrolysis of alkali or alkaline earth chlorides. - Google Patents

Process for the electrolysis of alkali or alkaline earth chlorides.

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Publication number
AT69137B
AT69137B AT69137DA AT69137B AT 69137 B AT69137 B AT 69137B AT 69137D A AT69137D A AT 69137DA AT 69137 B AT69137 B AT 69137B
Authority
AT
Austria
Prior art keywords
alkali
electrolysis
alkaline earth
earth chlorides
cathode
Prior art date
Application number
Other languages
German (de)
Original Assignee
Basf 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 Basf Ag filed Critical Basf Ag
Application granted granted Critical
Publication of AT69137B publication Critical patent/AT69137B/en

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  • Water Treatment By Electricity Or Magnetism (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Elektrolyse von Alkali-oder Erdalkalichloriden. 
 EMI1.1 
 fortschreiten lässt. Da die Hydroxylionen bei ihrer Entladung an der Anode Sauerstoff bilden, so wird durch diesen Vorgang nicht nur die Ausbeute herabgesetzt, sondern es werden auch die meist aus Kohle bestehenden Anoden stark angegriffen. 



   Um der Wanderung der Hydroxylionen zu begegnen, hat man schon empfohlen, als Diaphragma ein sogenanntes Filterdiaphragma zu benutzen, welches für den Elektrolyten leicht durchlässig ist, und durch dieses von der Anodenkammer her andauernd   Salzlösung   zur Kathodenkammer, also in umgekehrter Richtung zur Hydroxylionen-Wanderung, hindurchlaufen zu lassen. Bei einer bestimmten Strömungsgeschwindigkeit durch das Diaphragma gelingt es so tatsächlich, einen Teil der   entgegenwalldernden   Hydroxylionen im Kathodenraum zurückzuhalten.

   Die Wirkung eines solchen Filterdiaphragmas ist   indessen wegen   der ungleichen Grösse der   Filte poren und   der dadurch   bedingten verschiedenen 8trümungsgeschwimligkeit   der Flüssigkeit an den verschiedenen Stellen des Filters immer noch ungenügend, weshalb auch bisher zugleich noch andere Hilfsmittel angewendet wurden, um ein Eindringen von Hydroxylionen,   besonders   bei höheren   Alkalikollzentrationon,   nach Möglichkeit noch weiter zu verhindern.

   Man hat beispielsweise vorgeschlagen, die Kathodenlauge sofort mit Wasser 
 EMI1.2 
 wandeln und so die Hydroxylionen-Konzentration herabzusetzen oder die an der Kathode sich bildenden Alkalitröpfchen mit nichtleitendem Mineralöl zu emulgieren und sie so der weiteren 
 EMI1.3 
   Anodenflüssigkeit   zu vermeiden, wird die Anodenkammer dauernd von frischer Salzlösung durchspült. 



     PATENTANSPRÜCHE   :
1. Verfahren zur Elektrolyse von Alkali- oder Erdalkalichloriden, dadurch gekennzeichnet, dass man ein System von zwei oder mehr vertikalen Filterdiaphragmen verwendet, die vom Elektrolyten   ill   gleicher Richtung, von der Anode zur Kathode, durchflossen werden. 
 EMI1.4 
 

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



   <Desc / Clms Page number 1>
 



  Process for the electrolysis of alkali or alkaline earth chlorides.
 EMI1.1
 lets progress. Since the hydroxyl ions form oxygen at the anode when they are discharged, this process not only reduces the yield, but also strongly attacks the anodes, which are usually made of carbon.



   In order to counter the migration of the hydroxyl ions, it has already been recommended to use a so-called filter diaphragm as a diaphragm, which is easily permeable to the electrolyte, and through this a constant salt solution from the anode chamber to the cathode chamber, i.e. in the opposite direction to the migration of hydroxyl ions, to run through. At a certain flow rate through the diaphragm, it is actually possible to hold back some of the opposing hydroxyl ions in the cathode compartment.

   The effect of such a filter diaphragm is, however, still insufficient because of the unequal size of the filter pores and the resulting different diffusion speed of the liquid at the different points of the filter, which is why other aids have been used at the same time to prevent the penetration of hydroxyl ions, especially with higher alkali concentration, to be further prevented if possible.

   For example, it has been suggested to wash the cathode liquor immediately with water
 EMI1.2
 convert and so reduce the hydroxyl ion concentration or to emulsify the alkali droplets forming on the cathode with non-conductive mineral oil and so the other
 EMI1.3
   To avoid anolyte, the anode chamber is continuously rinsed with fresh saline solution.



     PATENT CLAIMS:
1. Process for the electrolysis of alkali or alkaline earth chlorides, characterized in that a system of two or more vertical filter diaphragms is used through which the electrolyte flows in the same direction, from the anode to the cathode.
 EMI1.4
 

** 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 **.
AT69137D 1911-12-13 1912-08-01 Process for the electrolysis of alkali or alkaline earth chlorides. AT69137B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE69137X 1911-12-13

Publications (1)

Publication Number Publication Date
AT69137B true AT69137B (en) 1915-06-25

Family

ID=5634794

Family Applications (1)

Application Number Title Priority Date Filing Date
AT69137D AT69137B (en) 1911-12-13 1912-08-01 Process for the electrolysis of alkali or alkaline earth chlorides.

Country Status (1)

Country Link
AT (1) AT69137B (en)

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