CH191432A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH191432A
CH191432A CH191432DA CH191432A CH 191432 A CH191432 A CH 191432A CH 191432D A CH191432D A CH 191432DA CH 191432 A CH191432 A CH 191432A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
parts
lightfast
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH191432A publication Critical patent/CH191432A/en

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

Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Gemäss dem im Hauptpatent     beschriebe-          nen    Verfahren erhält man     einen        Aoetalseide     in sehr     lichtechten        klaren        -Scharlachtönen    an  färbenden Farbstoff, wenn man     diazotiertes          4-Nitro-l-aminobenzol    mit     3-Chlor-l-diogy-          äthylaminobenzol    kuppelt.  



  Wie nun     weiter    ,gefunden wurde, erhält  man einen Farbstoff von ganz     ähnlichen     Eigenschaften, wenn man     diazotiertes        2.6-          Dichlor-l-amino-4-nitrobenzol    mit     3-Brom-          1-dioxyäthjaminobenzol    kuppelt.

      <I>Beispiel:</I>  Man     bereitet    eine     Diazolösung,    indem  man     bei    25 bis<B>30'</B> 20,7 Teile 2.     6-Dichlor-          1-amino-4-nitrobenzol    in durch     Eintragen     von 7     \feilen        Natriumnitrit    in 130 Teile kon  zentrierte Schwefelsäure bereitete     Nitrosyl-          schwefelsäure        einrührt    und die Masse hier  auf durch Aufgiessen auf     Eis    stark ver-    dünnt.

       Die        filtrierte    schwefelsaure     Diazo-          lösiing    läuft in     eine        kalte        Lösung    von 26  Teilen     3-Brom-l-diogyäthylaminobenzol    in  25 Teilen Salzsäure 23       Be    und<B>1000</B>     Teilen          Wasser    ein. Man     stumpft        hierauf        mit    so viel       1\Tatriumhydrogyd    ab, bis die Kupplung be  endet ist.

   Der     Farbstoff    färbt     Acetatseide    in  vollen,     lichtechten,        gelbstichig    braunen     Tti-          ren    an.



  Process for the preparation of an azo dye. According to the process described in the main patent, an aoetal silk is obtained in very lightfast, clear -charlach tones of coloring dye when diazotized 4-nitro-1-aminobenzene is coupled with 3-chloro-1-diogyethylaminobenzene.



  As has now also been found, a dye with very similar properties is obtained when diazotized 2,6-dichloro-1-amino-4-nitrobenzene is coupled with 3-bromo-1-dioxyethjaminobenzene.

      <I> Example: </I> A diazo solution is prepared by adding 20.7 parts of 2. 6-dichloro-1-amino-4-nitrobenzene at 25 to <B> 30 '</B> by adding 7 File sodium nitrite in 130 parts of concentrated sulfuric acid, stir in prepared nitrosylsulphuric acid and dilute the mass here by pouring it onto ice.

       The filtered sulfuric acid diazo solution runs into a cold solution of 26 parts of 3-bromo-1-diogyethylaminobenzene in 25 parts of hydrochloric acid 23 Be and 1000 parts of water. You then blunt with enough sodium hydroxide until the coupling has ended.

   The dye stains acetate silk in full, lightfast, yellow-tinged brown doors.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azo- farbstoffes, dadurch ;gekennzeichnet, daf5 man diazotiertes 2.6-DioMor-l-amino-4- ndtrobenzod mit 3-Brom-l-dioxyäthylamino- benzol kuppelt. Der Farbstoff färbt Acetat- seide iv vollen, lichtechten, gelbstichig brau nen Tönen an. Claim: Process for the preparation of an azo dye, characterized in that diazotized 2,6-DioMor-1-amino-4-throbenzod is coupled with 3-bromo-1-dioxyethylaminobenzene. The dye stains acetate silk iv full, lightfast, yellowish brown tones.
CH191432D 1935-03-13 1936-02-06 Process for the preparation of an azo dye. CH191432A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE191432X 1935-03-13
CH188887T 1936-02-06

Publications (1)

Publication Number Publication Date
CH191432A true CH191432A (en) 1937-06-15

Family

ID=25721700

Family Applications (1)

Application Number Title Priority Date Filing Date
CH191432D CH191432A (en) 1935-03-13 1936-02-06 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH191432A (en)

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