AT96290B - Process for the preparation of hexamethylenetetramine. - Google Patents

Process for the preparation of hexamethylenetetramine.

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Publication number
AT96290B
AT96290B AT96290DA AT96290B AT 96290 B AT96290 B AT 96290B AT 96290D A AT96290D A AT 96290DA AT 96290 B AT96290 B AT 96290B
Authority
AT
Austria
Prior art keywords
hexamethylenetetramine
methylene chloride
preparation
ammonia
added
Prior art date
Application number
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German (de)
Original Assignee
Holzverkohlungs Ind Aktien Ges
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 Holzverkohlungs Ind Aktien Ges filed Critical Holzverkohlungs Ind Aktien Ges
Application granted granted Critical
Publication of AT96290B publication Critical patent/AT96290B/en

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

Description

  

   <Desc/Clms Page number 1> 
 



  Verfahren zur   Herstellung   von Hexamethylentetramin. 



   Es ist bekannt, dass beim Erhitzen von Methylenchlorid mit alkoholischem Ammoniak Hexamethylentetramin entsteht. Des weiteren sind   Versuche bekannt, gemäss welchen   beim Erhitzen von   Methylenclorid   mit wässerigem Ammoniak auf höhere Temperaturen, z.   B.     200c,   Chlorammonium, Ammoniumformiat und   Methylaminchlorhydrat   gebildet wurde. 
 EMI1.1 
 tetramin in guter Ausbeute   aus Methylenehlorid herstellen   kann, wenn man die Körper bei Temperaturen aufeinander wirken lässt, welche   1200   nicht wesentlich übersteigen. Sehr gute Ergebnisse wurden z. B. 
 EMI1.2 
 zurück, um mit weiter sinkender Temperatur immer ungünstiger zu werden. Das Verfahren kann in Abwesenheit oder Gegenwart von Katalysatoren ausgeübt werden.

   Die Mitwirkung von Katalysatoren 
 EMI1.3 
 
Beispiel : 41 kg Methylenchlorid werden mit   10l   wässeriger Ammoniakläsung, welche im Liter   0. 23 kg NH   enthält, in einem Autoklaven 15 Stunden   lang-auf 100'erhitzt. Nach Abdestillieren   des bei dieser Temperatur noch   beständigen   Methylenchlorids, in vorliegendem Falle 12 kg, wird das Hexamethylentetramin aus dem Reaktionsgemisch, z. B. durch Kristallisation, gewonnen. Ausbeute : 7 2 kg =   90"o des umgesetzten Methylenclorids.   



   Es hat sich als zweckmässig erwiesen, mit einem Überschuss an Ammoniak zu arbeiten. Vorteilhaft kann man aber auch derart verfahren, dass man nur so viel Ammoniak zufügt, als zur Bildung von   Hexamethylentetramin   notwendig ist, und gleichzeitig noch zum Zwecke der Bindung der freiwerdenden Salzsäure entsprechende   Mengen von säurebindenden   Stoffen, z. B. Soda oder Ätzalkali, zufügt. 



   PATENT-ANSPRÜCHE :
1. Verfahren zur Herstellung von Hexamethylentetramin aus Methylenchlorid und Ammoniak, dadurch gekennzeichnet, dass man wässeriges Ammoniak bei unter   120 0 liegenden oder] 200 nicht wesentlich   
 EMI1.4 
 

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



   <Desc / Clms Page number 1>
 



  Process for the preparation of hexamethylenetetramine.



   It is known that when methylene chloride is heated with alcoholic ammonia, hexamethylenetetramine is formed. Furthermore, attempts are known, according to which when heating methylene chloride with aqueous ammonia to higher temperatures, eg. B. 200c, chlorammonium, ammonium formate and methylamine chlorohydrate was formed.
 EMI1.1
 tetramine can be produced in good yield from methylene chloride if the bodies are allowed to interact at temperatures which do not significantly exceed 1200. Very good results were e.g. B.
 EMI1.2
 back to become more and more unfavorable as the temperature falls further The process can be carried out in the absence or presence of catalysts.

   The involvement of catalysts
 EMI1.3
 
Example: 41 kg of methylene chloride are heated to 100 ° for 15 hours in an autoclave with 10 l of aqueous ammonia solution, which contains 0.23 kg of NH per liter. After distilling off the methylene chloride, which is still stable at this temperature, in the present case 12 kg, the hexamethylenetetramine is removed from the reaction mixture, e.g. B. by crystallization obtained. Yield: 72 kg = 90% of the converted methylene chloride.



   It has been found to be useful to work with an excess of ammonia. However, it is advantageous to proceed in such a way that only as much ammonia is added as is necessary for the formation of hexamethylenetetramine, and at the same time for the purpose of binding the hydrochloric acid released, corresponding amounts of acid-binding substances, e.g. B. Soda or caustic alkali adds.



   PATENT CLAIMS:
1. A process for the preparation of hexamethylenetetramine from methylene chloride and ammonia, characterized in that aqueous ammonia is used at less than 120 0 or] 200 not significantly
 EMI1.4
 

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

 

Claims (1)

wendet wird. is turned. 3. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass man nur so viel Ammoniak zufügt, als zur Bildung von Hexamethylentetramin notwendig ist, und gleichzeitig säurebildende Stoffe zufügt. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. 3. The method according to claim 1, characterized in that only as much ammonia is added as is necessary for the formation of hexamethylenetetramine, and at the same time acid-forming substances are added. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT96290D 1922-04-15 1922-04-15 Process for the preparation of hexamethylenetetramine. AT96290B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT96290T 1922-04-15

Publications (1)

Publication Number Publication Date
AT96290B true AT96290B (en) 1924-03-10

Family

ID=3615870

Family Applications (1)

Application Number Title Priority Date Filing Date
AT96290D AT96290B (en) 1922-04-15 1922-04-15 Process for the preparation of hexamethylenetetramine.

Country Status (1)

Country Link
AT (1) AT96290B (en)

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