CH119910A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

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Publication number
CH119910A
CH119910A CH119910DA CH119910A CH 119910 A CH119910 A CH 119910A CH 119910D A CH119910D A CH 119910DA CH 119910 A CH119910 A CH 119910A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
dye
pyrazolone
water
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 CH119910A publication Critical patent/CH119910A/en

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Description

  

  Verfahren zur     Darstellung'eines        Azofarbstoffes.       Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung eines     Azofarb-          stoffes    aus     diazotiertem    Anilin und 1-(3'  Sulfopheny 1) - 5 -     pyrazolon-    3     -karbonsäure-          äthylester.     



  Der Farbstoff kann sowohl in Substanz,  als auch auf einer geeigneten Unterlage er  zeugt werden.  



       Beispiel.:     312 Gewichtsteile     1-(3'-Sulfophenyl)-5-          pyrazolon-3-karbonsäureäthylester    werden in  etwa 2000 Teilen Wasser und der äquiva  lenten Menge Soda in der Kälte gelöst, dazu  gibt man 180 Gewichtsteile     Natriumacetat,     kristallisiert und lässt in die so vorbereitete  Lösung eine in bekannter Weise erhaltene       Diazolösung    aus 93 Gewichtsteilen Anilin  einlaufen. Der gebildete Farbstoff wird    durch     Aussalzen    abgeschieden, filtriert und  getrocknet. Er stellt ein gelbes, in Wasser  leicht lösliches Pulver dar, das Wolle in sehr  gleichmässig schönen, gelben Farbtönen von  sehr guter Lichtechtheit anfärbt.



  Process for the preparation of an azo dye. The subject of this additional patent is a process for the preparation of an azo dye from diazotized aniline and ethyl 1- (3 'sulfopheny 1) -5-pyrazolone-3-carboxylate.



  The dye can be produced either in substance or on a suitable base.



       Example .: 312 parts by weight of 1- (3'-sulfophenyl) -5- pyrazolone-3-carboxylic acid ethyl ester are dissolved in about 2000 parts of water and the equivalent amount of soda in the cold, 180 parts by weight of sodium acetate are added, crystallized and left in the So prepared solution run in a known manner obtained diazo solution of 93 parts by weight of aniline. The dye formed is deposited by salting out, filtered and dried. It is a yellow powder which is easily soluble in water and which dyes wool in very evenly beautiful, yellow shades of very good lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azo- farbstoffes, dadurch gekennzeichnet, da.ss man @diazotiertes Anilin mit 1-(3'-Sulfo- phenyl)-5-pyrazolon-,3 -karbonsäureäthylester vereinigt. Der Farbstoff stellt ein gelbes, in Was ser leicht lösliches Pulver dar, das Wolle in sehr gleichmässig schönen, gelben Farbtönen von sehr guter Lichtechtheit anfärbt. PATENT CLAIM: Process for the preparation of an azo dye, characterized in that @diazotized aniline is combined with ethyl 1- (3'-sulfophenyl) -5-pyrazolone-, 3-carboxylic acid ethyl ester. The dye is a yellow powder which is easily soluble in water and which dyes wool in very evenly beautiful, yellow shades of very good lightfastness.
CH119910D 1924-11-27 1925-11-24 Process for the preparation of an azo dye. CH119910A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE119910X 1924-11-27
CH118453T 1927-08-19

Publications (1)

Publication Number Publication Date
CH119910A true CH119910A (en) 1927-04-16

Family

ID=25709046

Family Applications (1)

Application Number Title Priority Date Filing Date
CH119910D CH119910A (en) 1924-11-27 1925-11-24 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH119910A (en)

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