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CH125117A - Process for the preparation of a pyrazolone azo dye. - Google Patents

Process for the preparation of a pyrazolone azo dye.

Info

Publication number
CH125117A
CH125117A CH125117DA CH125117A CH 125117 A CH125117 A CH 125117A CH 125117D A CH125117D A CH 125117DA CH 125117 A CH125117 A CH 125117A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
pyrazolone azo
dye
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 CH125117A publication Critical patent/CH125117A/en

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Description

  

      Verfahren    zur Darstellung eines     Pyrazolonazofarustoffes.       Gegenstand dieses Zusatzpatentes ist ein       Z'erfa'hren    zur Darstellung eines     Pyrazolon-          farbstoffes    aus     diazotierter        Anilin-o-sulfo-          säure    und     1-(4'-Chlor-5'-methyl-2'-sulfophe-          riyl)-5-pyrazolon-3-carbonsäureätliylester.       <I>Beispiel:

  </I>         ?61    Gewichtsteile des     Natriumsalzes    des  1- (4'-     Chlor-5'-        methyl-?'-        sulf        ophenyl)        -5-pyr-          azolon-3-carbonsäureäthylesters    werden in  Wasser gelöst und mit. überschüssiger Na  triumacetatlösung versetzt.

   In die so vor  bereitete Lösung läuft eine aus<B>173</B> Gewichts  teilen     o-Anilinsulfosäure    erhaltene     Dia.zo-          verbindung.    Der mit     Kaliumchlorid    voll  ständig abgeschiedene Farbstoff stellt nach  dem Absaugen und Trocknen ein     reingelbes       Pulver dar, welches     Wollex    in     grünstichig     gelbem Farbton von hervorragenden Echt  lieitseigenscha.ften anfärbt.



      Process for the preparation of a pyrazolonazofarust The subject of this additional patent is a demonstration of the preparation of a pyrazolone dye from diazotized aniline-o-sulfonic acid and 1- (4'-chloro-5'-methyl-2'-sulfopheriyl) -5-pyrazolone 3-carboxylic acid ethyl ester. <I> example:

  61 parts by weight of the sodium salt of 1- (4'-chloro-5'-methyl -? '- sulfophenyl) -5-pyr-azolone-3-carboxylic acid ethyl ester are dissolved in water and mixed with. excess sodium acetate solution added.

   A Dia.zo compound obtained from <B> 173 </B> parts by weight of o-aniline sulfonic acid runs into the solution prepared in this way. The dye, which is completely separated with potassium chloride, is a pure yellow powder after suction and drying, which Wollex dyes in a greenish yellow shade of excellent fastness properties.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Pyr- azolonazofarbstoffes, dadurch gekennzeichnet, dass dia.zotierte Anilin-o-sulfosäure mit 1-(4'- Chlor-5' -.methyl-2'-snilfophenyl)-5-pyrazolan- 3-earbonsäureäthylester gekuppelt wird. Der Farbstoff stellt getrocknet ein rein gelbes Pulver dar, das Wolle in grünstichig- gelbem Farbton von hervorragenden Echt- heitseigensehaften anfärbt. Claim: Process for the preparation of a pyrazolonazo dye, characterized in that dia.zotierte aniline-o-sulfonic acid with 1- (4'-chloro-5'-methyl-2'-snilfophenyl) -5-pyrazolan-3-carboxylic acid ethyl ester is coupled. The dyestuff is a pure yellow powder when dried, which dyes wool in a greenish-yellow shade with excellent fastness properties.
CH125117D 1925-11-19 1926-11-16 Process for the preparation of a pyrazolone azo dye. CH125117A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE125117X 1925-11-19
CH124137T 1926-11-16

Publications (1)

Publication Number Publication Date
CH125117A true CH125117A (en) 1928-04-02

Family

ID=25710195

Family Applications (1)

Application Number Title Priority Date Filing Date
CH125117D CH125117A (en) 1925-11-19 1926-11-16 Process for the preparation of a pyrazolone azo dye.

Country Status (1)

Country Link
CH (1) CH125117A (en)

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