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CH195228A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH195228A
CH195228A CH195228DA CH195228A CH 195228 A CH195228 A CH 195228A CH 195228D A CH195228D A CH 195228DA CH 195228 A CH195228 A CH 195228A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
pure
dye
dinitraniline
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH195228A publication Critical patent/CH195228A/en

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Description

  

      Verfahren    zur     Darstellung    eines     Azofarbstoffes.       Es wurde gefunden, dass man durch Kup  peln von dianotiertem     6-Chlor-2,4-dinitranilin     mit     3-Dioxyäthylaminoacetanilid    einen schwer  löslichen     Azofarbstoff    erhält, der sehr wert  volle Eigenschaften besitzt. Er stellt ein  dunkelgrünes, messingglänzendes Pulver dar,  das sich in Alkohol leicht mit rein violetter  Farbe löst und Lacke oder     Zelluloseester    in       lichtechten,    reinen, blaustichig violetten Tönen  anfärbt. Die Textilfärbungen sind rein weiss       ätzbar.     



  <I>Beispiel:</I>  217,5     Gt.        6-Chlor-2,4-dinitranilin    werden  in bekannter Weise mit einer     Nitrosylschwefel-          säure    entsprechend 69     Gt.    Nitrit dianotiert  und kalt mit der dreifachen Menge Eisessig  verdünnt. Diese Lösung wird in dünnem Strahl  unter gutem Rühren zu einer eiskalten salz  sauren Lösung von 238     Gt.        3-Dioxyäthyl-          aminoacetanilid    zulaufen gelassen. Die     Farb-          stoffbildung    kann beschleunigt werden durch  Abstumpfen der stark mineralsauren Reak  tion.

   Nach Verschwinden der kongosauren      Reaktion fällt der Farbstoff als schwarzer  Niederschlag aus, der in bekannter Weise  isoliert und getrocknet wird. Er stellt ein  dunkelgrünes, messingglänzendes Pulver dar,  das sich in Alkohol leicht mit rein violetter  Farbe löst und Lacke oder     Zelluloseester    in  lichtechten, reinen, blaustichig violetten Tö  nen anfärbt. Die Textilfärbungen sind rein  weiss     ätzbar.  



      Process for the preparation of an azo dye. It has been found that by Kup peln of dianotated 6-chloro-2,4-dinitraniline with 3-dioxyethylaminoacetanilide a sparingly soluble azo dye is obtained, which has very valuable properties. It is a dark green, shiny brass powder that easily dissolves in alcohol with a purely violet color and stains paints or cellulose esters in lightfast, pure, bluish violet tones. The textile dyeings can be etched in pure white.



  <I> Example: </I> 217.5 Gt. 6-chloro-2,4-dinitraniline are in a known manner with a nitrosylsulfuric acid corresponding to 69 pbw. Dianotized nitrite and diluted cold with three times the amount of glacial acetic acid. This solution is poured in a thin stream with thorough stirring to an ice-cold salt-acid solution of 238 parts by weight. 3-Dioxyäthyl- aminoacetanilid allowed to run in. The formation of color can be accelerated by blunting the strongly mineral acidic reaction.

   After the Congo acidic reaction has disappeared, the dye separates out as a black precipitate, which is isolated and dried in a known manner. It is a dark green, shiny brass powder that easily dissolves in alcohol with a purely violet color and colors paints or cellulose esters in lightfast, pure, bluish violet tones. The textile dyeings can be etched in pure white.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man di anotiertes 6-Chlor-2,4-dinitranilin mit 3-Dioxy- äthylaminoacetanilid kuppelt. Der neue Farb stoff stellt ein dunkelgrünes, messingglänzendes Pulver dar, das sich in Alkohol leicht mit rein violetter Farbe löst und Lacke oder Zel- luloseester in lichtechten, reinen, blaustichig violetten Tönen anfärbt. Die Textilfärbungen sind rein weiss ätzbar. PATENT CLAIM: Process for the preparation of an azo dye, characterized in that the anotated 6-chloro-2,4-dinitraniline is coupled with 3-dioxyethylaminoacetanilide. The new dye is a dark green, shiny brass powder that easily dissolves in alcohol with a purely violet color and colors paints or cellulose esters in lightfast, pure, bluish violet tones. The textile dyeings can be etched in pure white.
CH195228D 1935-08-27 1936-08-13 Process for the preparation of an azo dye. CH195228A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB195228X 1935-08-27
CH192853T 1936-08-13

Publications (1)

Publication Number Publication Date
CH195228A true CH195228A (en) 1938-01-15

Family

ID=25722336

Family Applications (1)

Application Number Title Priority Date Filing Date
CH195228D CH195228A (en) 1935-08-27 1936-08-13 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH195228A (en)

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