DE461694C - Process for the preparation of alkali metal by molten electrolysis of alkali metal chloride - Google Patents

Process for the preparation of alkali metal by molten electrolysis of alkali metal chloride

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Publication number
DE461694C
DE461694C DEW69655D DEW0069655D DE461694C DE 461694 C DE461694 C DE 461694C DE W69655 D DEW69655 D DE W69655D DE W0069655 D DEW0069655 D DE W0069655D DE 461694 C DE461694 C DE 461694C
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DE
Germany
Prior art keywords
alkali metal
alkali
chloride
electrolysis
preparation
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
DEW69655D
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German (de)
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.)
Wacker Chemie AG
Original Assignee
Wacker Chemie 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 Wacker Chemie AG filed Critical Wacker Chemie AG
Priority to DEW69655D priority Critical patent/DE461694C/en
Application granted granted Critical
Publication of DE461694C publication Critical patent/DE461694C/en
Expired legal-status Critical Current

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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
    • C25C3/02—Electrolytic production, recovery or refining of metals by electrolysis of melts of alkali or alkaline earth metals

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)

Description

Verfahren zur Darstellung von Alkalimetall durch schmelzflüssige Elektrolyse von Alkalimetallchlorid. Um durch schmelzflüssige Elektrolyse im Dauerbetrieb in wirtschaftlicher Weise AI-kalimetall aus Alkalimetallchlorid, insbesondere Natrium aus Chlornatrium, zu erzeugen, ist die Anwendung eines Chlorids von sehr hohem Reinheitsgrade Voraussetzung. Die Reindarstellung eines Salzes von dem erforderlichen hohen Reinheitsgrade ist aber umständlich und kostspielig.Process for the preparation of alkali metal by molten electrolysis of alkali metal chloride. To use molten electrolysis in continuous operation in economical way Al-Kalimetall from alkali metal chloride, especially sodium from sodium chlorine, is the use of a chloride of a very high degree of purity Pre-condition. The pure representation of a salt of the required high degree of purity but it is cumbersome and expensive.

Wir haben gefunden, daß Alkalimetallchlorid, wie es bei der Elektrolyse wäßriger Chloralkalien beim Eindampfen der Lauge ausfällt, ein hervorragend geeignetes Ausgangsmaterial für die schmelzflüssige Elektrolyse darstellt. Das Salz ist nämlich nur mit Spuren Alkali!hydrat verunreinigt, welche leicht durch gründliches Auswaschen mit Wasser- oder Salzlösung oder auch durch Neutralisation mit einer entsprechend geringen Menge Salzsäure zu entfernen sind. Das Salz ist im übrigen völlig rein, weil die für die Chloralkalielektrolyse verwandte Sole bereits vor ihrer Einführung in die Zellen stets einem Reinigungsprozeß unterworfen wird und die Elektrolyse selbst noch Verunreinigung wie Eisen- und Aluminiumhydrat zur Ausfällung bringt. Die Erzeugung eines gleichwertigen Salzes für die Schmelzflußelektrolyse würde einen gleich wirksamen Reinigungsprozeß erforderlich machen, der nach der Erfindung erspart wird. Insbesondere wird die kostspielige Eindampfung der Salzlösung erspart.We have found that alkali metal chloride, as is the case with electrolysis aqueous alkaline chlorine precipitates during evaporation of the lye, an eminently suitable one Is the starting material for molten electrolysis. The salt is namely Contaminated only with traces of alkali hydrate, which can be easily removed by thorough washing with water or saline solution or by neutralization with a corresponding a small amount of hydrochloric acid must be removed. Incidentally, the salt is completely pure, because the brine used for chlor-alkali electrolysis even before its introduction in the cells is always subjected to a cleaning process and electrolysis even causes impurities such as iron and aluminum hydrate to precipitate. The production of an equivalent salt for fused salt electrolysis would be one make equally effective cleaning process required, which saves according to the invention will. In particular, the costly evaporation of the salt solution is saved.

Mit so gewonnenem Chlorid, das in beliebiger Menge erhältlich ist, läßt sich die schmelzflüssige Elektrolyse von Alkalimetallchlorid wochen-, ja monatelang ununterbrochen durchführen, sofern natürlich für Fernhaltung von Verunreinigung anderer Herkunft Sorge getragen wird.With the chloride obtained in this way, which is available in any quantity, The molten electrolysis of alkali metal chloride can last for weeks, even months Carry out uninterruptedly provided, of course, to keep contamination away other origin is taken care of.

Claims (1)

PATENTANSPRUCH: Verfahren zur Durchführung der schmelzflüssigen Elektrolyse von Alkalichlorid zwecks Darstellung von Alkalimetall, insbesondere Verfahren zur Darstellung von Natrium aus Chlornatrium, dadurch gekennzeichnet, daß Alkalimetallchlorid, insbesondere Chlornatrium, verwendet wird, welches beim Eindampfen der durch Elektrolyse wäßriger Chloralkalilösungen gebildeten Lauge ausfällt, wobei die in dem Salz etwa noch enthaltenen Reste von Alkalihydrat zweckmäßig durch Waschen mit Wasser, Salzlösung oder durch Neutralisieren mit Salzsäure entfernt werden.PATENT CLAIM: Process for carrying out molten electrolysis of alkali chloride for the purpose of preparing alkali metal, in particular processes for Preparation of sodium from sodium chloride, characterized in that alkali metal chloride, in particular sodium chloride, is used, which during evaporation of the electrolysis Aqueous chlor-alkali solutions precipitated alkali, with the in the salt about Any residues of alkali hydrate that may still be present can be expediently washed with water or saline solution or can be removed by neutralization with hydrochloric acid.
DEW69655D 1925-06-18 1925-06-18 Process for the preparation of alkali metal by molten electrolysis of alkali metal chloride Expired DE461694C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEW69655D DE461694C (en) 1925-06-18 1925-06-18 Process for the preparation of alkali metal by molten electrolysis of alkali metal chloride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEW69655D DE461694C (en) 1925-06-18 1925-06-18 Process for the preparation of alkali metal by molten electrolysis of alkali metal chloride

Publications (1)

Publication Number Publication Date
DE461694C true DE461694C (en) 1928-06-26

Family

ID=7608438

Family Applications (1)

Application Number Title Priority Date Filing Date
DEW69655D Expired DE461694C (en) 1925-06-18 1925-06-18 Process for the preparation of alkali metal by molten electrolysis of alkali metal chloride

Country Status (1)

Country Link
DE (1) DE461694C (en)

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