DE905608C - Process for the production of permanent iron (II) chloride - Google Patents

Process for the production of permanent iron (II) chloride

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Publication number
DE905608C
DE905608C DER8555A DER0008555A DE905608C DE 905608 C DE905608 C DE 905608C DE R8555 A DER8555 A DE R8555A DE R0008555 A DER0008555 A DE R0008555A DE 905608 C DE905608 C DE 905608C
Authority
DE
Germany
Prior art keywords
chloride
iron
acid
production
permanent iron
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
DER8555A
Other languages
German (de)
Inventor
Herbert Hoff
Dr Hubert Jaeschke
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.)
Honeywell Riedel de Haen AG
Original Assignee
Riedel de Haen 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 Riedel de Haen AG filed Critical Riedel de Haen AG
Priority to DER8555A priority Critical patent/DE905608C/en
Application granted granted Critical
Publication of DE905608C publication Critical patent/DE905608C/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/10—Halides

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Herstellung von beständigem Eisen(II)-chlorid Gegenstand der Erfindung ist ein Verfahren zur Herstellung von beständigem Eisen(II)-chlorid.Process for the production of permanent ferrous chloride object of the invention is a process for the production of persistent ferrous chloride.

Bekanntlich stellt das Eisen(II)-chlorid eine an der Luft schnell unter Oxydation bräunlichgrün werdende Verbindung dar. Die bisherigen Versuche, diese Oxydation zu verhindern und ein beständiges Eisen(II)-chlorid zu gewinnen, haben bislang noch zu keinen befriedigenden Ergebnissen geführt.It is well known that iron (II) chloride reacts quickly when exposed to air brownish-green under oxidation. The previous attempts, to prevent this oxidation and to obtain a stable iron (II) chloride, have not yet led to satisfactory results.

Es wurde nun gefunden, daß man überraschenderweise ein beständiges Eisen(II)-chlorid erhalten kann, wenn man Eisen(II)-chlorid aus seinen wäßrigen Lösungen in Abwesenheit überschüssiger freier Salzsäure und unter gänzlichem Ausschluß von Kupfer in Gegenwart schwacher organischer Säuren, wie beispielsweise Ameisensäure, Milchsäure, Glykolsäure, zur Kristallisation bringt. Die so erhaltenen Kristalle werden nach der Erfindung zweckmäßig mit einem Eisen(III)-chlorid lötsenden Mittel, z. B. Eisessig, gewaschen und hernach in einem trockenen Luftstrom, der eine geringe Menge einer flüchtigen Säure, wie Ameisensäure, enthält, getrocknet. Ein unter Einhaltung dieser Bedingungen hergestelltes Eisen(II)-chlorid entspricht der Formel Fe Cl. - q. H2 O und besteht aus schwach blaugrünen Kristallen, die unter normalen Verhältnissen durchaus beständig sind und in hellen Flaschen aufbewahrt sich jahrelang unverändert halben.It has now been found that, surprisingly, a stable iron (II) chloride can be obtained if iron (II) chloride is obtained from its aqueous solutions in the absence of excess free hydrochloric acid and with the complete exclusion of copper in the presence of weak organic acids, such as, for example Formic acid, lactic acid, glycolic acid, brings about crystallization. The crystals obtained in this way are expediently treated according to the invention with an iron (III) chloride soldering agent, e.g. B. glacial acetic acid, washed and then dried in a stream of dry air containing a small amount of a volatile acid such as formic acid. An iron (II) chloride produced in compliance with these conditions corresponds to the formula Fe Cl. - q. H2 O and consists of pale blue-green crystals, which are quite stable under normal conditions and are kept unchanged for years in light bottles.

Beispiel Eine Lösung eines aus äquivalenten Mengen von nickelfreiem Carbonyleisen und reiner Salzsäure hergestellten Eisen(II)-chlorides wird mit Ameisensäure (bzw. mit Milchsäure, Glykolsäure oder anderen organischen Säuren schwachen Säuregrades) schwach sauer eingestellt, blank filtriert, in ,einem Kletterverdampfer konzentriert und zur Kristallisation abgekühlt. Die so erhaltenen Kristalle -,verden abgesaugt, mit Eisessig mehrere :Male gewaschen und anschließend in einem trockenen, eine geringe Menge Ameisensäure enthaltenden Luftstrom getrocknet.Example A solution of one of equivalent amounts of nickel-free Iron (II) chlorides made from carbonyl iron and pure hydrochloric acid are made with formic acid (or with lactic acid, glycolic acid or other organic acids with a weak acidity) weak acidified, filtered blank, concentrated in a climbing evaporator and cooled to crystallize. The crystals obtained in this way -, are filtered off with suction, with Glacial acetic acid several: washed times and then in a dry, a low Amount of formic acid-containing air stream dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von beständigem Eisen(II)-chlorid, dadurch gekennzeichnet, daß man Eisen(II)-chlorid in Abwesenheit Überschüssiger Salzsäure und unter gänzlichem Ausschluß von Kupfer in Gegenwart :schwacher organischer Säuren in bekannter Weise aus seinen wäßrigen Lösungen zur Kristallisation bringt und die so erhaltenen Kristalle zweckmäßig mit einem Eisen(III)-chlorid lösenden Mittel, beispielsweise Eisessig, wäscht und hernach in einem trockenen Luftstrom, der eine geringe Menge einer flüchtigen Säure, wie Ameisensäure, enthält, trocknet.PATENT CLAIM: Process for the production of permanent iron (II) chloride, characterized in that iron (II) chloride is used in the absence of excess Hydrochloric acid and with the complete exclusion of copper in the presence: weak organic Brings acids to crystallization in a known manner from its aqueous solutions and expediently dissolving the crystals obtained in this way with an iron (III) chloride Means, for example glacial acetic acid, washes and then in a dry air stream, containing a small amount of a volatile acid such as formic acid, dries.
DER8555A 1952-03-14 1952-03-14 Process for the production of permanent iron (II) chloride Expired DE905608C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER8555A DE905608C (en) 1952-03-14 1952-03-14 Process for the production of permanent iron (II) chloride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER8555A DE905608C (en) 1952-03-14 1952-03-14 Process for the production of permanent iron (II) chloride

Publications (1)

Publication Number Publication Date
DE905608C true DE905608C (en) 1954-03-04

Family

ID=7397922

Family Applications (1)

Application Number Title Priority Date Filing Date
DER8555A Expired DE905608C (en) 1952-03-14 1952-03-14 Process for the production of permanent iron (II) chloride

Country Status (1)

Country Link
DE (1) DE905608C (en)

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