AT79320B - Process for the production of sodium ferrocyanide in crystals. - Google Patents

Process for the production of sodium ferrocyanide in crystals.

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Publication number
AT79320B
AT79320B AT79320DA AT79320B AT 79320 B AT79320 B AT 79320B AT 79320D A AT79320D A AT 79320DA AT 79320 B AT79320 B AT 79320B
Authority
AT
Austria
Prior art keywords
crystals
production
ferrocyanide
sodium ferrocyanide
liquid
Prior art date
Application number
Other languages
German (de)
Original Assignee
Techno Chemical Lab Ltd Fa
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 Techno Chemical Lab Ltd Fa filed Critical Techno Chemical Lab Ltd Fa
Application granted granted Critical
Publication of AT79320B publication Critical patent/AT79320B/en

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Description

  

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 behandelt werden, beispielsweise zur Verwertung des Stickstoffes als Ammoniak und der vert   bleibende Rückstand, welcher hauptsächlich aus Natriumkarbonat besteht, kann zur Fällung eines weitereWeiles des Bariums im nächsten Arbeitsgang verwendet werden.   



   PATENT-ANSPRÜCHE :
1. Verfahren zur Herstellung von Ferrocyanid in Kristallen, dadurch gekennzeichnet,   dass-eine insbesondere Natrium-Ferroeyanid und Natriumkarbonat enthaltende Lösung bei zirka 800 C bis zum Kristallisationspunkte eingedampft und langsam bis zur Temperatur der   maximalen Löslichkeit des Natriumkarbonates abgekühlt wird, wodurch man die Ausscheidung von praktisch reinem   Ferrocyanid   erzielt, bei welcher Temperatur sodann die   übrige   Flüssigkeit abgezogen wird, bevor noch eine merkliche Ausscheidung   von Natriumkarbonatkristallen ein-   treten könnte.



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 can be treated, for example to utilize the nitrogen as ammonia, and the remaining residue, which mainly consists of sodium carbonate, can be used for the precipitation of a further portion of the barium in the next operation.



   PATENT CLAIMS:
1. A process for the production of ferrocyanide in crystals, characterized in that a solution containing in particular sodium ferroeyanide and sodium carbonate is evaporated at about 800 C to the crystallization point and slowly cooled to the temperature of the maximum solubility of the sodium carbonate, whereby the excretion of obtained practically pure ferrocyanide, at which temperature the remaining liquid is then drawn off before a noticeable precipitation of sodium carbonate crystals could occur.

Claims (1)

2. Ausführungsform des Verfahrens nach Anspruch 1 zur Gewinnung von Natriumferrocyanidkristallen, dadurch gekennzeichnet, dass nach Eindampfung der Flüssigkeit bei zirka 8 () 0 C bis zum Punkte, wo das Natriumkarbonat eben zu kristallisieren beginnt ; die Abkühlung bis zu einer Temperatur von zirka 350 C erfolgt, wo dann die Lösung von den abgelagerten Kristallen abgezogen wird. 2. embodiment of the method according to claim 1 for obtaining sodium ferrocyanide crystals, characterized in that after evaporation of the liquid at about 8 () 0 C up to the point where the sodium carbonate just begins to crystallize; the cooling takes place to a temperature of approx. 350 C, where the solution is then drawn off from the deposited crystals. 3. Ausführungsform des Verfahrens nach Anspruch 1 und 2, dadurch gekennzeichnet, dass die bei zirka 350 C abgezogene Flüssigkeit zur Herstellung einer weiteren Menge des ursprünglichen Gemisches verwendet wird, und das während des ersten Kühlprozesses nicht auskristallisierte Ferrocyanid zu verwerten. 3. Embodiment of the method according to claim 1 and 2, characterized in that the withdrawn at about 350 C liquid to produce a further amount of the original Mixture is used, and that did not crystallize out during the first cooling process Recycle ferrocyanide.
AT79320D 1917-08-16 1917-08-16 Process for the production of sodium ferrocyanide in crystals. AT79320B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT79320T 1917-08-16

Publications (1)

Publication Number Publication Date
AT79320B true AT79320B (en) 1919-12-10

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ID=3600835

Family Applications (1)

Application Number Title Priority Date Filing Date
AT79320D AT79320B (en) 1917-08-16 1917-08-16 Process for the production of sodium ferrocyanide in crystals.

Country Status (1)

Country Link
AT (1) AT79320B (en)

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