AT68167B - Process for the preparation of nitric acid guanidine from cyanamide. - Google Patents

Process for the preparation of nitric acid guanidine from cyanamide.

Info

Publication number
AT68167B
AT68167B AT68167DA AT68167B AT 68167 B AT68167 B AT 68167B AT 68167D A AT68167D A AT 68167DA AT 68167 B AT68167 B AT 68167B
Authority
AT
Austria
Prior art keywords
nitric acid
cyanamide
preparation
acid guanidine
guanidine
Prior art date
Application number
Other languages
German (de)
Original Assignee
Oesterreichischer Ver Fuer Che
Metallurg Production
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 Oesterreichischer Ver Fuer Che, Metallurg Production filed Critical Oesterreichischer Ver Fuer Che
Application granted granted Critical
Publication of AT68167B publication Critical patent/AT68167B/en

Links

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur Darstellung von salpetersaurem Guanidin aus Cyanamid. 
 EMI1.1 
 Verbindungen gehen in stark sauren Lösungen durch Behandlung mit Königswasser oder Chloraton in Guanidin über. Auch durch Erhitzen ihrer Lösungen unter Druck bei höherer Temperatur kann nach D. R. P. Nr. 242216 Guanidin erhalten werden. Die Überführung 
 EMI1.2 
 
 EMI1.3 
 
 EMI1.4 
 die   Salpetersäure   zusetzt und dann weiter eindampft oder ob man erst konzentriert und dann die Säure zusetzt. Jedenfalls muss aber bis   zum Aufhören   der Gasentwicklung gekocht worden. Die   Konzentration   der Lauge und Saure ist belanglos.

   Zweckmässigerweise wird man natürlich so konzentriert arbeiten, dass erhebliche Mengen des Produktes mangels Lösungsmittels ausfallen und weiters sicherbeitschalber auch einen Überschuss an Salpeter- 
 EMI1.5 
 löslich ist als in Wasser. 



   Man kann beispielsweise   folgendermassen   arbeiten : Durch Auslaugen von   Kalkstlcktoff   und Fällen des Kalkes mit Kohlensäure wird eine wässerige Lösung vou Cyanamid hergestellt. Diese Lösung wird mit   Salpetersäure im Überschuss   versetzt und   eingedampft. Mac   kann jedoch auch nach Konzentration der Lösung auf ein beliebiges Mass die Salpetersäure zusetzen, nur ist in ersterem Falle die Gasentwicklung (CO2) weniger lästig als in letzterem Falle.

   Nach dem Erkalten der Flüssigkeit scheidet sich die   Vfrbimi ng   aus und kann von der Mutterlauge, die wegen ihres   Satpetersäureüberschusses   bei eine) nächsten Operation zugesetzt wird, durch Abnutschen getrennt werden, Hat sich in der Mutterlauge Ammoniumnitrat angereichert, so wird   sie   beseitigt und auf dieses Salz verarbeitet. 

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



   <Desc / Clms Page number 1>
 



  Process for the preparation of nitric acid guanidine from cyanamide.
 EMI1.1
 In strongly acidic solutions, compounds are converted into guanidine by treatment with aqua regia or chlorate. According to D. R. P. No. 242216 guanidine can also be obtained by heating their solutions under pressure at a higher temperature. The overpass
 EMI1.2
 
 EMI1.3
 
 EMI1.4
 add the nitric acid and then continue to evaporate, or whether you concentrate first and then add the acid. In any case, it must be boiled until the evolution of gas has ceased. The concentration of the lye and acid is irrelevant.

   It is advisable, of course, to work in such a concentrated manner that considerable quantities of the product precipitate due to a lack of solvent and, furthermore, an excess of saltpeter
 EMI1.5
 is more soluble than in water.



   One can work as follows, for example: By leaching out limestone and precipitating the lime with carbonic acid, an aqueous solution of cyanamide is produced. This solution is mixed with excess nitric acid and evaporated. Mac can, however, add any amount of nitric acid even after concentrating the solution, only in the former case the evolution of gas (CO2) is less bothersome than in the latter case.

   After the liquid has cooled down, the mixture separates and can be separated from the mother liquor, which is added in the next operation because of its excess satpetic acid, by suction filtration.If ammonium nitrate has accumulated in the mother liquor, it is removed and this salt is added processed.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Darstellung von salpetersaurem Guanidin aus Cyanamid, dadurch gekennzeichnet, dass man einen heissen, wässerigen Auszug von Kalkstickstoff mit Salpetersaure versetzt und so lange kocht, bis die gasentwicklung aufhört. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the preparation of nitric acid guanidine from cyanamide, characterized in that nitric acid is added to a hot, aqueous extract of calcium cyanamide and boiled until the evolution of gas ceases. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT68167D 1913-03-19 1913-03-19 Process for the preparation of nitric acid guanidine from cyanamide. AT68167B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT68167T 1913-03-19

Publications (1)

Publication Number Publication Date
AT68167B true AT68167B (en) 1915-03-10

Family

ID=3590050

Family Applications (1)

Application Number Title Priority Date Filing Date
AT68167D AT68167B (en) 1913-03-19 1913-03-19 Process for the preparation of nitric acid guanidine from cyanamide.

Country Status (1)

Country Link
AT (1) AT68167B (en)

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