CH249028A - 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
CH249028A
CH249028A CH249028DA CH249028A CH 249028 A CH249028 A CH 249028A CH 249028D A CH249028D A CH 249028DA CH 249028 A CH249028 A CH 249028A
Authority
CH
Switzerland
Prior art keywords
azo dye
preparation
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 CH249028A publication Critical patent/CH249028A/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     dia.zotiertem    1-     Oxy-    2     -          amino-4-chlorbenzol    und     1-Phenyl-3-methyl-          5-pyrazolon    in Gegenwart von     Pyridin    mit       Benzoesäure-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 rotorangen Tönen.

           Beispiel:       65,7 Teile des     Azofarbstoffes    aus     diazo-          tiertem        1-Oxy-2-amino-4-chlorbenzol    und     1-          Phenyl-3-methyl-5-pyrazolon    werden in 280  Teilen     Pyridin    bei 50-60  gelöst und hierauf  128 Teile     Benzoesä.ure-3,5-disulfochlorid    un  ter gutem Rühren zugegeben. Durch Probe  entnahme kann die     Veresterung    verfolgt  werden. 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        Natriumchlorid-          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, ö -dioxyazo dye, characterized in that

   that the azo dye from dia.zotierter 1-oxy-2-amino-4-chlorobenzene and 1-phenyl-3-methyl-5-pyrazolone is esterified in the presence of pyridine with benzoic acid-3,5-disulfochloride.



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

           Example: 65.7 parts of the azo dye from diazotized 1-oxy-2-amino-4-chlorobenzene and 1-phenyl-3-methyl-5-pyrazolone are dissolved in 280 parts of pyridine at 50-60 and then 128 parts of benzoic acid .ure-3,5-disulfochloride 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 diazatiertem 1- Oxy- 2 - amino-4-chlorbenzol und 1-Phenyl-3-methyl- 5-pyra.zolon in Gegenwart von Pyridin mit Benzoesäure-3,5-disulfochlorid verestert wird. PATENT CLAIM: A process for the production of an ester-like derivative of an o, ö -dioxyazo dye, characterized in that the azo dye is made from diazated 1- oxy- 2-amino-4-chlorobenzene and 1-phenyl-3-methyl- 5- pyra.zolon is esterified with benzoic acid-3,5-disulfochloride in the presence of pyridine. Das neue Farbstoff derivat bildet nach dem Aufarbeiten und Trocknen ein gelbes, wasserlösliches Pulver. Es färbt Wolle nach dem Einbadverfahren in Gegenwart chrom abgebender Mittel in rotorangen Tönen. The new dye derivative forms a yellow, water-soluble powder after working up and drying. It dyes wool in red-orange tones using the single bath method in the presence of chrome-releasing agents.
CH249028D 1944-10-06 1944-10-06 Process for the preparation of an ester type azo dye derivative. CH249028A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH249028T 1944-10-06
CH244049T 1945-08-22

Publications (1)

Publication Number Publication Date
CH249028A true CH249028A (en) 1947-05-31

Family

ID=25728882

Family Applications (1)

Application Number Title Priority Date Filing Date
CH249028D CH249028A (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) CH249028A (en)

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