CH249014A - 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
CH249014A
CH249014A CH249014DA CH249014A CH 249014 A CH249014 A CH 249014A CH 249014D A CH249014D A CH 249014DA CH 249014 A CH249014 A CH 249014A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye derivative
ester type
oxy
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 CH249014A publication Critical patent/CH249014A/en

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Description

  

  Verfahren zur Herstellung eines     esterartigen        Azofarbstoffderivates.       Gegenstand des. vorliegenden Zusatzpaten  tes     ist    ein Verfahren zur Herstellung eines       esterartigen    Derivates     eines        o,ö        -Dioxyazo-          farbstoffes,    dadurch gekennzeichnet, dass der       Azofarbstoff    aus     diazotiertem    1 -     Oxy    - 2     -          amino-4-chlor-5-nitrobenzol    und     1-Oxy-5,

  8-          dichlornaphtalin    in Gegenwart von     Pyridin     mit     Benzoesäure    - 3 -     sulfochlorid    verestert  wird.  



  Das neue     Farbstoffderivat    bildet nach  dem Aufarbeiten und Trocknen ein braunes,  wasserlösliches Pulver. Es färbt Wolle nach  dem     Einbadverfahren    in Gegenwart chrom  abgebender     Mittel    in blaugrünen Tönen.         Beispiel:       66 Teile     Benzoesäure-3-sulfochlorid    wer  den in 270 Teilen     Pyridin    bei 50 bis 60   gelöst.

   Bei 40 bis. 50  werden 41,2 Teile des       Azofarbstoffes    aus     diazotiertem    1 -     Oxy    - 2     -          amino-4-chlor-5-nitrobenzol    und     1-Oxy-5,8-          diehlornaphtalin    unter gutem Rühren zu  gegeben. Nach zwei Stunden ist .die Vereste-         rung    beendet.

   Dann wird das     Pyridin    im  Vakuum     abdestilliert,    der     Destillationsrück-          sta.nd    in etwa 500 Teilen Wasser aufgenom  men und der     Farbstoffester    mit 100 Teilen       Natriumchlorid        ausgesalzen.    Die Masse wird  verrührt, bis das     Farbstoffderivat        ,gut        fil-          trierbar    geworden ist. Hierauf     wird    ab  filtriert 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 preparation of an ester-like derivative of an o, o -dioxyazo dye, characterized in that the azo dye is made from diazotized 1-oxy-2-amino-4-chloro-5-nitrobenzene and 1-oxy -5,

  8-dichloronaphthalene is esterified with benzoic acid - 3 - sulfochloride in the presence of pyridine.



  After working up and drying, the new dye derivative forms a brown, water-soluble powder. It dyes wool by the single bath process in the presence of chromium-releasing agents in blue-green tones. Example: 66 parts of benzoic acid 3-sulfochloride who dissolved in 270 parts of pyridine at 50 to 60.

   At 40 to. 50 41.2 parts of the azo dye from diazotized 1-oxy-2-amino-4-chloro-5-nitrobenzene and 1-oxy-5,8-diehlornaphthalene are added with thorough stirring. The esterification is over after two hours.

   The pyridine is then distilled off in vacuo, the distillation residue is taken up 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 easy to filter. It is then filtered off and dried in vacuo.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines ester- artigen Derivates eines o,ö -Dioxyazofarb- stoffes, dadurch gekennzeichnet, dass der Azofarhstoff aus diazotiertem 1 - Oxy - 2 - amino-4-chlor-5-nitrobenzol und 1-Oxy-5,8- diohlo@rnaphtalin in Gegenwart von Pyri.din mit Benzoesäure - 3 - sulfochlorid verestert wird. PATENT CLAIM: Process for the preparation of an ester-like derivative of an o, ö -dioxyazo dye, characterized in that the azo carbon is made from diazotized 1 - oxy - 2 - amino-4-chloro-5-nitrobenzene and 1-oxy-5,8 - diohlo @ rnaphtalin is esterified with benzoic acid - 3 - sulfochloride in the presence of pyridine. Das neue Farbstoffderivat bildet nach dem Aufarbeiten und Trocknen ein braunes, wasserlösliches Pulver. Es färbt Wolle nach dem Einbadverfahren in Gegenwart chrom abgebender Mittel in blaugrünen Tönen. After working up and drying, the new dye derivative forms a brown, water-soluble powder. It dyes wool by the single bath process in the presence of chromium-releasing agents in blue-green tones.
CH249014D 1944-10-06 1944-10-06 Process for the preparation of an ester type azo dye derivative. CH249014A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH249014T 1944-10-06
CH244049T 1945-08-22

Publications (1)

Publication Number Publication Date
CH249014A true CH249014A (en) 1947-05-31

Family

ID=25728868

Family Applications (1)

Application Number Title Priority Date Filing Date
CH249014D CH249014A (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) CH249014A (en)

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