CH292051A - Process for the preparation of an aliphatic, complex-forming diamino-N, N'-tetraacetic acid. - Google Patents

Process for the preparation of an aliphatic, complex-forming diamino-N, N'-tetraacetic acid.

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Publication number
CH292051A
CH292051A CH292051DA CH292051A CH 292051 A CH292051 A CH 292051A CH 292051D A CH292051D A CH 292051DA CH 292051 A CH292051 A CH 292051A
Authority
CH
Switzerland
Prior art keywords
diamino
tetraacetic acid
complex
aliphatic
forming
Prior art date
Application number
Other languages
German (de)
Inventor
Ag J R Geigy
Original Assignee
Ag J R Geigy
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 Ag J R Geigy filed Critical Ag J R Geigy
Publication of CH292051A publication Critical patent/CH292051A/en

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Description

  

  Verfahren     zur    Herstellung einer     aliphatischen,        komplexbildenden        Diamino-N,N'-tetraessigsäure.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Herstellung einer     aliphatischen,     komplexbildenden     Diamino-N,N'-tetraessig-          #,äure.    Das Verfahren ist. dadurch gekenn  zeichnet, dass man     ss,ss'-Diamiiro-diät.hyläther-          N,N'-t.etraaeetonitril    verseift.  



  Die erhaltene neue Verbindung, die     ss"B'-          Diamino    -     diäthylätIrer    -     N,N'    -     tetraessigsäure,     stellt ein weisses Pulver dar. Sie soll als     Textil-          hilfsmittel    Verwendung finden.  



       Beispiel:     <B><U>'2</U></B>6 Teile     ss,ss'-Diamino-diäthyläther-N,N'-          tetraaeetonitril,    erhältlich aus     ss,ss'-Diamino-          cliätliylätlier,    Formaldehyd und Blausäure       naeli    an sieh bekannter Methode, werden mit  120 Teilen 16,7     o/oiger    Natronlauge am     Rüek-          i'1u1@    so lange auf 95-105  erhitzt,-     bis    kein       :linmoniak    mehr entweicht.

   Die Lösung wird  hierauf etwas     verdünnt..    Nach Filtration der  Reaktionslösung     versetzt    man mit Salzsäure       :30o/oig    bis zur sehwach kongosauren Reaktion       arid    verrührt alsdann bei mässiger Temperatur    mit etwa 2500 Teilen Methanol. Nach länge  rein Stehen scheidet. sich die gebildete Tetra  essigsäure langsam ab. Durch Umkristallisa  tion aus     wässrigem    Alkohol kann die     ss,ss'-          Diainino-diäthyläther-N,Nj'-tetraessigsäLtre    in  reiner Form als weisses Kristallpulver erhal  ten werden.  



  Die Verbindung besitzt eine grosse     Kom-          plexbildungskonstante    für     Erdalkaliionen    und  ist deshalb geeignet, die Härtebildner des  Wassers in komplexer Bindung zu halten oder       bereits    gebildete Niederschläge, verursacht.  durch     Erdalkaliionen,    wieder aufzulösen.



  Process for the preparation of an aliphatic, complex-forming diamino-N, N'-tetraacetic acid. The present patent relates to a process for the preparation of an aliphatic, complex-forming diamino-N, N'-tetraacetic acid. The procedure is. characterized in that ss, ss'-diamiiro-diet.hylether-N, N'-t.etraaeetonitrile is saponified.



  The new compound obtained, the ss "B'-diamino-diethylether-N, N'-tetraacetic acid, is a white powder. It is said to be used as a textile aid.



       Example: <B><U>'2</U> </B> 6 parts of ss, ss'-diamino-diethyl ether-N, N'-tetraaeetonitrile, obtainable from ss, ss'-diamino-cliätliylätlier, formaldehyde and hydrocyanic acid According to the well-known method, 120 parts of 16.7% sodium hydroxide solution are heated on the back to 95-105 - until no more linmoniac escapes.

   The solution is then somewhat diluted. After the reaction solution has been filtered, it is mixed with hydrochloric acid: 30% strength until the reaction is weakly Congo acidic, then stirred with about 2500 parts of methanol at a moderate temperature. After standing for a long time separates. the tetra acetic acid formed slowly from. The ss, ss'-diainino-diethyl ether-N, Nj'-tetraacetic acid can be obtained in pure form as a white crystal powder by recrystallization from aqueous alcohol.



  The compound has a large complex formation constant for alkaline earth metal ions and is therefore suitable for keeping the hardness components of water in complex bonds or for causing precipitates that have already formed. by alkaline earth ions to dissolve again.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eine aliphati- sehen, komplexbildenden Diamino-N,N'-tetra- essigsäure, dadurch gekennzeichnet, dass man l,f"- Diamino - diäthyläther - N,N'- tetraaceto- nitril verseift. Die erhaltene neue Verbindung, die ss,ss'- Diamino - diäthyläther - N,N' - tetraessigsäure, PATENT CLAIM: Process for the production of an aliphatic, complex-forming diamino-N, N'-tetraacetic acid, characterized in that 1, f "- diamino - diethyl ether - N, N'-tetraacetonitrile is saponified. The new compound obtained , the ss, ss'- diamino - diethyl ether - N, N '- tetraacetic acid, stellt ein weisses Pulver dar. represents a white powder.
CH292051D 1950-10-24 1950-10-24 Process for the preparation of an aliphatic, complex-forming diamino-N, N'-tetraacetic acid. CH292051A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH292051T 1950-10-24

Publications (1)

Publication Number Publication Date
CH292051A true CH292051A (en) 1953-07-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
CH292051D CH292051A (en) 1950-10-24 1950-10-24 Process for the preparation of an aliphatic, complex-forming diamino-N, N'-tetraacetic acid.

Country Status (1)

Country Link
CH (1) CH292051A (en)

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