CH255318A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH255318A
CH255318A CH255318DA CH255318A CH 255318 A CH255318 A CH 255318A CH 255318D A CH255318D A CH 255318DA CH 255318 A CH255318 A CH 255318A
Authority
CH
Switzerland
Prior art keywords
production
azo dye
new azo
new
sulfuric acid
Prior art date
Application number
Other languages
German (de)
Inventor
Limited Imperial Ch Industries
Original Assignee
Ici Ltd
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 Ici Ltd filed Critical Ici Ltd
Publication of CH255318A publication Critical patent/CH255318A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B29/00Monoazo dyes prepared by diazotising and coupling
    • C09B29/06Monoazo dyes prepared by diazotising and coupling from coupling components containing amino as the only directing group
    • C09B29/08Amino benzenes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines neuen     Azofarbstoffes.       Die vorliegende Erfindung bezieht sich  auf ein Verfahren zur     Herstellung    eines  neuen     Azofarbstoffes,    gemäss welchem     diazo-          tiertes        2-Cyan-4-nitranilin    mit dem     Schwe-          felsäureester    des     N-ss-Oxyäthyl-N-ss'-p-chlor-          phenoxyäthylanilins    gekuppelt wird.  



  Der neue Farbstoff bildet ein mattes pur  purfarbenes Pulver, welches in     heissem    Was  ser eine     bläulichrote    Lösung und in Schwe  felsäure eine stumpfe orangerote Lösung er  gibt. Er färbt     Zelluloseacetatkunstseide    in       rötlichvioletten    Farbtönen.

      <I>Beispiel:</I>  16,3 Teile     2-Cyan-4-nitranilin    werden ge  mäss der in Beispiel 1 des     brit.    Patentes       Nr.447561    beschriebenen Methode     diazotiert     und die so erhaltene Lösung der     Diazoverbin-          dung    auf Eis gegossen und das Produkt all  rnählich unter Rühren einer gekühlten Lö  sung von 39,4 Teilen des     Na.triumsalzes    des       N"        ss-Oxyäthyl-N-ss'        p-chlorphenoxyäthylani-          linseh,#vefeIsäureesters    in 400 Teilen Wasser    hinzugesetzt.

   Nach beendeter Kupplung wird  das Gemisch langsam mit 40%igem     wässri-          gem        Natriumhydroxyd    so lange versetzt, und  zwar unter Aufrechterhaltung einer Tem  peratur von weniger als 10  C durch Aussen  kühlung, bis das Gemisch eben     lackmusalka-          lisch    reagiert. Hierauf wird das;     Gemisch     während einer weiteren Stunde gerührt und  der Farbstoff alsdann     abfiltriert,    mit wenig  Wasser gewaschen und bei 30 bis 40  C ge  trocknet.



  Process for the production of a new azo dye. The present invention relates to a process for the preparation of a new azo dye, according to which diazotized 2-cyano-4-nitroaniline is coupled with the sulfuric acid ester of N-ßs-oxyethyl-N-ßs'-p-chlorophenoxyethylaniline .



  The new dye forms a matt, pure, purple powder, which gives a bluish-red solution in hot water and a dull orange-red solution in sulfuric acid. It dyes cellulose acetate artificial silk in reddish purple hues.

      <I> Example: </I> 16.3 parts of 2-cyano-4-nitroaniline are diazotized according to the method described in Example 1 of British Patent No. 447561 and the solution of the diazo compound thus obtained is poured onto ice and the product was added gradually with stirring to a cooled solution of 39.4 parts of the sodium salt of N "ß-oxyethyl-N-ß-p-chlorophenoxyethylaniline acid ester in 400 parts of water.

   After the coupling is complete, 40% aqueous sodium hydroxide is slowly added to the mixture, while maintaining a temperature of less than 10 C by means of external cooling, until the mixture reacts in a litmus alkaline manner. Then it becomes; The mixture was stirred for a further hour and the dye was then filtered off, washed with a little water and dried at 30 to 40.degree.

 

Claims (1)

<B>PATENTANSPRUCH:</B> Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass diazotiertes 2-Cyan-4-nitranilin mit dem Schwefelsäureester des N-ss-Oxyäthyl-N-ss'-p- chlorphenoxyäthylanilins gekuppelt wird. Der neue Farbstoff bildet ein mattes pur purfarbenes Pulver, welches in heissem Was ser eine bläulichrote Lösung und in Schwe felsäure eine stumpfe orangerote Lösung er gibt. <B> PATENT CLAIM: </B> Process for the production of a new azo dye, characterized in that diazotized 2-cyano-4-nitroaniline is coupled with the sulfuric acid ester of N-ßs-oxyethyl-N-ßs'-p-chlorophenoxyethylaniline. The new dye forms a matt, pure, purple powder, which gives a bluish-red solution in hot water and a dull orange-red solution in sulfuric acid. Er färbt Zelluloseacetatkunstseide in r ötlichvioletten Farbtönen. It dyes cellulose acetate artificial silk in reddish-violet shades.
CH255318D 1944-08-28 1945-08-28 Process for the production of a new azo dye. CH255318A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB255318X 1944-08-28
CH249376T 1945-08-28

Publications (1)

Publication Number Publication Date
CH255318A true CH255318A (en) 1948-06-15

Family

ID=25729352

Family Applications (1)

Application Number Title Priority Date Filing Date
CH255318D CH255318A (en) 1944-08-28 1945-08-28 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH255318A (en)

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