CH191428A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH191428A
CH191428A CH191428DA CH191428A CH 191428 A CH191428 A CH 191428A CH 191428D A CH191428D A CH 191428DA CH 191428 A CH191428 A CH 191428A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
nitro
chloro
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 CH191428A publication Critical patent/CH191428A/en

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Description

  

  Verfahren     zur    Darstellung eines     Azofarbstoffes.       Gemäss dem im Hauptpatent beschrie  benen Verfahren erhält man einen Acetat  seide in sehr lichtechten, klaren Scharlach  tönen anfärbenden Farbstoff; wenn man     di-          azotiertes        4-Nitro-l-amiriobenzol    mit.     3-Chlor-          1-dioxyäthylamirrober)zol    kuppelt.  



  Wie nun weiter gefunden wurde, erhält  man einen     Farbstoff    von ganz ähnlichen Echt  heitseigenschaften, wenn man     diazotiertes          4-Nitro-2-chlor--1-amirrobenzol    mit     3-Brom-1-          dioxyäthylanrinobenzol    kuppelt.

      <I>Beispiel:</I>    Eine aus 17,3 Teilen     4-Nitro=2-chlor-l-          aminobenzol    auf dem     üblicben    Wege darge  stellte     Diazolösung    lässt man in eine kalte  Lösung von 26 Teilen 3-Brom-l-dioxyäthyl-         aminobenzol    in 25 Teilen Salzsäure 23   Bö  und 800 Teilen Wasser einfliessen und stumpft  zur Beendigung der Kupplung mit Natrium  acetat ab. Der anfallende     Farbstoff    färbt       Acetatseide    in echten Rottönen an.



  Process for the preparation of an azo dye. According to the process described in the main patent, an acetate silk is obtained in a very lightfast, clear scarlet tones dye; if you diazotized 4-nitro-l-amiriobenzene with. 3-chloro-1-dioxyäthylamirrober) zol couples.



  As has now been found further, a dye of very similar authenticity properties is obtained if one couples diazotized 4-nitro-2-chloro - 1-amirrobenzene with 3-bromo-1-dioxyäthylanrinobenzene.

      <I> Example: </I> A diazo solution prepared from 17.3 parts of 4-nitro = 2-chloro-l-aminobenzene in the usual way is allowed to pour into a cold solution of 26 parts of 3-bromo-l-dioxyethyl Aminobenzene pour in 25 parts of hydrochloric acid 23 Bö and 800 parts of water and blunt with sodium acetate to complete the coupling. The resulting dye stains acetate silk in real shades of red.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man di- azotiertes 4-Nitro-2-chlor-l-aminoberizol mit 3-Brom-l-dioxyäthylaminobenzol kuppelt. Der Farbstoff färbt Acetatseide. in echten Rot tönen an. PATENT CLAIM: Process for the preparation of an azo dye, characterized in that diazotized 4-nitro-2-chloro-1-aminoberizole is coupled with 3-bromo-1-dioxyethylaminobenzene. The dye dyes acetate silk. in real red tones.
CH191428D 1935-03-13 1936-02-06 Process for the preparation of an azo dye. CH191428A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE191428X 1935-03-13
CH188887T 1936-02-06

Publications (1)

Publication Number Publication Date
CH191428A true CH191428A (en) 1937-06-15

Family

ID=25721696

Family Applications (1)

Application Number Title Priority Date Filing Date
CH191428D CH191428A (en) 1935-03-13 1936-02-06 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH191428A (en)

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