CH191434A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH191434A
CH191434A CH191434DA CH191434A CH 191434 A CH191434 A CH 191434A CH 191434D A CH191434D A CH 191434DA CH 191434 A CH191434 A CH 191434A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
parts
diazotized
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 CH191434A publication Critical patent/CH191434A/en

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Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Gemäss dem im     Hauptpatent    beschriebe  nen     @'erfa.hren    erhält man einen     Acetatseide          in        sehr     klaren Scharlachtönen an  färbenden Farbstoff, wenn man     diazotiertes          4-Nitro-i-aminobenzol    mit     3-Chlor-l-diox;7-          'ithylaminobenzal    rappelt.  



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

      <I>Beispiel:</I>    Eine durch Eintragen von 29,6 Teilen  2.     6-1)ibrom-l-amino-4-nitrobenzol    in 130  Teile konzentrierte Schwefelsäure und 7  Teile     Natriumnitrit    bei 25 bis 30   und Auf  giessen auf Eis dargestellte     Diazolösung    lässt    man in eine Lösung von 26 Teilen     3-Brom-          1-dioxyäthylaminobenzol    in 25 Teilen Salz  säure 23       Be    und 1000 Teilen Wasser ein  fliessen und stumpft zur     Beendigung    der       Kupplung    mit     hTatriumhydroxyd    ab.

   Der       Farbstoff    färbt     Acetatseide    in     echten    gelb  braunen Tönen an.



  Process for the preparation of an azo dye. According to the process described in the main patent, an acetate silk in very clear scarlet shades of coloring dye is obtained if diazotized 4-nitro-i-aminobenzene is rapped with 3-chloro-1-diox; 7- 'ithylaminobenzal.



  As has now been further found, received. you get a dye of .completely similar properties if you couple diazotized 2,6-dibromo-1-amino-4-nitrobenzene with 3-bromo-1-dioxyäthylaminobenzene.

      <I> Example: </I> One by adding 29.6 parts 2. 6-1) ibromo-l-amino-4-nitrobenzene in 130 parts concentrated sulfuric acid and 7 parts sodium nitrite at 25 to 30 and pouring on ice Diazo solution shown is allowed to flow into a solution of 26 parts of 3-bromo-1-dioxyäthylaminobenzol in 25 parts of hydrochloric acid 23 Be and 1000 parts of water and blunted to complete the coupling with sodium hydroxide.

   The dye stains acetate silk in real yellow-brown tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azo- farbstoffes, dadurch gekennzeichnet, -ass man diazotiertes 2.6-Dibrom-l-amino-4- nitrobenzol mit 3-Brom-l-diogyäthylamino- benzol kuppelt. Der Farbstoff färbt Acetat seide in echten gelbbraunen Tönen an. PATENT CLAIM: A process for the preparation of an azo dye, characterized in that diazotized 2,6-dibromo-1-amino-4-nitrobenzene is coupled with 3-bromo-1-diogyethylaminobenzene. The dye stains acetate silk in real yellow-brown tones.
CH191434D 1935-03-13 1936-02-06 Process for the preparation of an azo dye. CH191434A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE191434X 1935-03-13
CH188887T 1936-02-06

Publications (1)

Publication Number Publication Date
CH191434A true CH191434A (en) 1937-06-15

Family

ID=25721702

Family Applications (1)

Application Number Title Priority Date Filing Date
CH191434D CH191434A (en) 1935-03-13 1936-02-06 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH191434A (en)

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