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CH249011A - Process for the preparation of an ester type azo dye derivative. - Google Patents

Process for the preparation of an ester type azo dye derivative.

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Publication number
CH249011A
CH249011A CH249011DA CH249011A CH 249011 A CH249011 A CH 249011A CH 249011D A CH249011D A CH 249011DA CH 249011 A CH249011 A CH 249011A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
dye derivative
ester type
dye
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH249011A publication Critical patent/CH249011A/en

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

Description

  

  Verfahren zur Herstellung eines     esterartigen        Azofarbstoffderivates.       Gegenstand des vorliegenden Zusatz  patentes ist ein Verfahren zur Herstellung  eines     esterartigen    Derivates eines     o,ö        -Dioxy-          azofa.rbstoffes,    dadurch gekennzeichnet,

       @dass     der     Azofarbstoff    aus     diazotiertem        1-Ogy-2-          amino-4-ehlor-6-nitrobenzol    und     p-Kresol    in  Gegenwart     von.        Pyridin    mit     Benzoesäure-3-          sulfochlorid        verestert    wird.  



  Das neue     Farbstoffderivat    bildet nach  dem     Aufarbeiten    und     Trocknen    ein ,gelbes,  wasserlösliches Pulver. Es färbt Wolle nach  dem     Einbadverfahren        in        Gegenwart    chrom  abgebender Mittel in     violettbraunen    Tönen.         Beispiel:       62 Teile     Benzoesäure-3-sulfochlorid    wer  den in 300 Teilen     Pyridin    bei 50 bis 60  ge  löst.

   Bei 40 bis 50  werden 30 Teile des       Azofarbstoffes    aus     diazotiertem    1-     Oxy    - 2     -          amino    - 4 -chlor- 6     -nitrobenzol        und        p-Kresol     unter gutem Rühren zugegeben. Durch Probe  entnahme kann die     Veresterung    verfolgt wer  den. Dieselbe ist beendet, wenn eine     Probe       beim Versetzen mit Wasser     keine,        Fällung     mehr gibt.

   Dann wird das     Pyridin        im    Va  kuum     abdestilliert,    der     Destillationsrück-          stand    in etwa 500 Teilen Wasser gelöst und  der     Farbstoffester    mit 100 Teilen Natrium  chlorid     ausgesalzen.    Die Masse wird ver  rührt,     bis    das     Farbstoffderivat    gut     filtrier-          bar    geworden ist. Hierauf wird     abfiltriert     und im Vakuum getrocknet.



  Process for the preparation of an ester type azo dye derivative. The subject of the present additional patent is a process for the production of an ester-like derivative of an o, ö -Dioxy- azofa.rstoffes, characterized in that

       @that the azo dye from diazotized 1-Ogy-2-amino-4-chloro-6-nitrobenzene and p-cresol in the presence of. Pyridine is esterified with benzoic acid 3-sulfochloride.



  After working up and drying, the new dye derivative forms a yellow, water-soluble powder. It dyes wool using the single bath process in the presence of chrome-releasing agents in purple-brown tones. Example: 62 parts of benzoic acid 3-sulfochloride who dissolves the in 300 parts of pyridine at 50 to 60 ge.

   At 40 to 50, 30 parts of the azo dye from diazotized 1-oxy-2-amino-4-chloro-6-nitrobenzene and p-cresol are added with thorough stirring. The esterification can be followed by taking a sample. The same process is over when a sample no longer gives any precipitation when it is mixed with water.

   The pyridine is then distilled off in vacuo, the distillation residue is dissolved in about 500 parts of water and the dye ester is salted out with 100 parts of sodium chloride. The mass is stirred until the dye derivative has become easily filterable. It is then filtered off and dried in vacuo.

Claims (1)

PATENTANSPRUCH; Verfahren zur Herstellung eines ester- artigen Darivates eines o,ö -Dioxyazofarb- stoffes, dadurch gekennzeichnet, PATENT CLAIM; Process for the production of an ester-like derivative of an o, ö -dioxyazo dye, characterized in that dass der Azofarbstoff aus diazotiertem 1 - Oxy - 2 - amino-4-chlor-6-nitrobenzol und p-Kresol in Gegenwart von Pyridin mit Benzoesäure-3- sulfochlorid verestert wird. Das neue Farbstoffderivat bildet nach dem Aufarbeiten und Trocknen ein gelbes, wasser lösliches Pulver. that the azo dye from diazotized 1 - oxy - 2 - amino-4-chloro-6-nitrobenzene and p-cresol is esterified with benzoic acid-3-sulfochloride in the presence of pyridine. After working up and drying, the new dye derivative forms a yellow, water-soluble powder. Es färbt Wolle nach dem Einbadverfahren in Geigenwart chrom abgebender Mittel in violettbraunen Tönen. It dyes wool in violet-brown tones using the one-bath method in Geigenwart chrome-releasing agents.
CH249011D 1944-10-06 1944-10-06 Process for the preparation of an ester type azo dye derivative. CH249011A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH249011T 1944-10-06
CH244049T 1945-08-22

Publications (1)

Publication Number Publication Date
CH249011A true CH249011A (en) 1947-05-31

Family

ID=25728865

Family Applications (1)

Application Number Title Priority Date Filing Date
CH249011D CH249011A (en) 1944-10-06 1944-10-06 Process for the preparation of an ester type azo dye derivative.

Country Status (1)

Country Link
CH (1) CH249011A (en)

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