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CH249033A - Process for the preparation of an ester type azo dye derivative. - Google Patents

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

Info

Publication number
CH249033A
CH249033A CH249033DA CH249033A CH 249033 A CH249033 A CH 249033A CH 249033D A CH249033D A CH 249033DA CH 249033 A CH249033 A CH 249033A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
ester type
dye derivative
derivative
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 CH249033A publication Critical patent/CH249033A/en

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

Description

  

      Verfahren    zur Herstellung eines     esterartigen        Azofarbstoffderivates.       Gegenstand des vorliegenden Zusatzpaten  tes ist ein Verfahren zur Herstellung eines       esterartigen    Derivates eines     o,o'-Dioxyazo-          farbstoffes,    dadurch gekennzeichnet,

   dass der       Azofa.rbstoff    aus     diazotiertem    1-     Oxy-    2     -          amino-4-chlorbenzol        und        Acetessig-o-anisidid     in Gegenwart von     Pyridin    mit     Denzoesäure-          3,5-disulfochlorid        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 gelben Tönen.  



  <I>Beispiel:</I>  128 Teile     Benzoesäure-3,5-disulfochlorid     werden in 270 Teilen     Pyridin    bei 50-G0   gelöst. Bei 40-50  werden 72,3 Teile des       Azofarbstoffes    aus     dia.zotiertem        1-Oxy-2-          amino-4-chlorbenzol    und     Acetessig-o-anisidid     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    und der     Destillationsrück-          stand    in etwa 500 Teile einer 10%igen Na  triumchloridlösung eingetragen. Die Masse  wird verrührt, bis das     Farbstoffderivat    gut       filtrierbar    geworden ist. Es     wird    dann     ab-          filtriert    und mit 10%iger     Natriumohlorid-          lösung    gewaschen. Das neue Derivat wird  am besten 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, o'-dioxyazo dye, characterized in that

   that the azo dye from diazotized 1-oxy-2-amino-4-chlorobenzene and acetoacetic-o-anisidide is esterified with denzoic acid-3,5-disulfochloride in the presence of pyridine.



  The new dye derivative forms a yellow, water-soluble powder after working up and drying. It dyes wool in yellow tones using the single bath method in the presence of chrome-releasing agents.



  <I> Example: </I> 128 parts of benzoic acid-3,5-disulfochloride are dissolved in 270 parts of pyridine at 50-G0. At 40-50, 72.3 parts of the azo dye from dia.zotierter 1-oxy-2-amino-4-chlorobenzene and acetoacetic-o-anisidide are added with thorough stirring. The esterification can be followed by taking a sample. This is over when a sample no longer gives any precipitation when it is mixed with water.

   The pyridine is then distilled off in vacuo and the distillation residue is added to about 500 parts of a 10% sodium chloride solution. The mass is stirred until the dye derivative has become easily filterable. It is then filtered off and washed with 10% sodium chloride solution. The new derivative is best dried in a vacuum.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines ester- artigen Derivates eines o,ö -Dioxyazofarb- stoffes, dadurch gekennzeichnet, dass der Azofarbstoff aus diazotiertem 1- Ogy- 2 - amino-4-chlorbenzol und Acetessig-o-a-nisidid in Gegenwart von Pyridin mit Benzoesäure- -3,5-disulfochlorid verestert wird. Claim: Process for the preparation of an ester-like derivative of an o, ö -dioxyazo dye, characterized in that the azo dye is made from diazotized 1- Ogy- 2-amino-4-chlorobenzene and acetoacetic-oa-nisidide in the presence of pyridine with benzoic acid - -3,5-disulfochloride is esterified. 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 gelben Tönen. The new dye derivative forms a yellow, water-soluble powder after working up and drying. It dyes wool in yellow tones using the single bath method in the presence of chrome-releasing agents.
CH249033D 1944-10-06 1944-10-06 Process for the preparation of an ester type azo dye derivative. CH249033A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH249033T 1944-10-06
CH244049T 1945-08-22

Publications (1)

Publication Number Publication Date
CH249033A true CH249033A (en) 1947-05-31

Family

ID=25728887

Family Applications (1)

Application Number Title Priority Date Filing Date
CH249033D CH249033A (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) CH249033A (en)

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