AT130656B - Process for obtaining concentrated formic acid. - Google Patents

Process for obtaining concentrated formic acid.

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Publication number
AT130656B
AT130656B AT130656DA AT130656B AT 130656 B AT130656 B AT 130656B AT 130656D A AT130656D A AT 130656DA AT 130656 B AT130656 B AT 130656B
Authority
AT
Austria
Prior art keywords
formic acid
sodium
concentrated formic
obtaining concentrated
sulfuric acid
Prior art date
Application number
Other languages
German (de)
Original Assignee
Ig Farbenindustrie 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.)
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Publication date
Application filed by Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Application granted granted Critical
Publication of AT130656B publication Critical patent/AT130656B/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

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  Verfahren zur Gewinnung konzentrierter Ameisensäure. 
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 späteren Zeitpunkt die Ameisensäure in bekannter Weise abdestilliert werden, u. zw. entweder unmittelbar aus dem Mischgefäss oder nach Überführung des Reaktionsgemisches in eine besondere Destilliervorrichtung. Aus Zweckmässigkeitsgründen findet die Destillation der Ameisensäure im Vakuum statt. Die Ausbeute ist annähernd quantitativ. 



     PATENT-ANSPRÜCHE   :
1. Verfahren zur Gewinnung konzentrierter Ameisensäure aus einem Gemisch von Calciumformiat mit konzentrierter Ameisensäure durch Umsetzung mit einer äquivalenten Menge Schwefelsäure und Abdestillieren der Ameisensäure bei gewöhnlichem oder vermindertem Druck, dadurch gekennzeichnet, dass man der Aufschlämmung des Calciumformiates vor der Umsetzung mit Schwefelsäure wasserfreies oder wasserhaltiges Natriumsulfat in einer Menge von 1 bis 10   0/   des angewendeten Caleiumformiates zusetzt.



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  Process for obtaining concentrated formic acid.
 EMI1.1
 

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 later the formic acid can be distilled off in a known manner, u. either directly from the mixing vessel or after transferring the reaction mixture into a special distillation device. For reasons of expediency, the formic acid is distilled in vacuo. The yield is almost quantitative.



     PATENT CLAIMS:
1. A process for obtaining concentrated formic acid from a mixture of calcium formate with concentrated formic acid by reaction with an equivalent amount of sulfuric acid and distilling off the formic acid at ordinary or reduced pressure, characterized in that the slurry of calcium formate before the reaction with sulfuric acid anhydrous or hydrous sodium sulfate added in an amount of 1 to 10 0 / of the caleium formate used.

Claims (1)

2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass man von einem Ameisensäure- Calciumformiat-Gemisch ausgeht, welches auf 1 Gewichtsteil Calciumformiat 0'6 bis 1 Gewichtsteil Ameisensäure enthält. 2. The method according to claim 1, characterized in that one starts from a formic acid-calcium formate mixture which contains 0'6 to 1 part by weight of formic acid per part by weight of calcium formate. 3. Abänderung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass man an Stelle von Natriumsulfat eine entsprechende Menge einer durch Schwefelsäure in Natriumsulfat überführbaren Natriumverbindung verwendet und die zur Freimachung der Ameisensäure aus dem Calciumformiat erforderliche Schwefelsäuremenge um die zur Bildung des Natriumsulfates erforderliche Schwefelsäuremenge erhöht. 3. Modification of the method according to claim 1, characterized in that instead of sodium sulfate, a corresponding amount of a sodium compound which can be converted into sodium sulfate by sulfuric acid is used and the amount of sulfuric acid required to liberate the formic acid from the calcium formate is increased by the amount of sulfuric acid required to form the sodium sulfate. 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass man als Natriumverbindung das Natriumsalz einer flüchtigen Säure wie Natriumformiat, Natriumcarbonat od. dgl. verwendet. 4. The method according to claim 3, characterized in that the sodium salt of a volatile acid such as sodium formate, sodium carbonate or the like is used as the sodium compound.
AT130656D 1931-01-22 1931-01-22 Process for obtaining concentrated formic acid. AT130656B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT130656T 1931-01-22

Publications (1)

Publication Number Publication Date
AT130656B true AT130656B (en) 1932-12-10

Family

ID=3636605

Family Applications (1)

Application Number Title Priority Date Filing Date
AT130656D AT130656B (en) 1931-01-22 1931-01-22 Process for obtaining concentrated formic acid.

Country Status (1)

Country Link
AT (1) AT130656B (en)

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