CH180962A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH180962A
CH180962A CH180962DA CH180962A CH 180962 A CH180962 A CH 180962A CH 180962D A CH180962D A CH 180962DA CH 180962 A CH180962 A CH 180962A
Authority
CH
Switzerland
Prior art keywords
azo dye
colors
preparation
light
sulfobenzene
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 CH180962A publication Critical patent/CH180962A/en

Links

Description

  

  Verfahren zur Herstellung eines     Azofarbstoffes.       Es wurde gefunden, dass man einen wert  vollen     Azofarbstoff,    der sich in Substanz  oder auf der Faser mit Metallsalzen behan  deln lässt, erhält, wenn man die     Diazover-          bindung    der     N-(3'-Aminobenzolsalfonyl)-3-          amino-2-oxy-5-sulfobenzol-l-carbonsäure    mit       3-Methyl-5-pyrazolon    kuppelt.  



  Der so erhaltene Farbstoff färbt Wolle  sehr gleichmässig in     grünstichig    gelben  Tönen, die durch N     achchromieren    sehr gute  Echtheitseigenschaften, insbesondere gegen  Licht, Waschen und Walken, erhalten. Die  in Substanz hergestellte Chromverbindung  besitzt ein ganz hervorragendes     Egalisierver-          mögen    und färbt die tierische Faser in sehr  gut licht-, wasch-, walk und reibechten  Farbtönen.  



  <I>Beispiel:</I>  388 Teile     N-(3'-Aminobenzolsulfonyl)-3-          amino    - 2 -     ogy    - 5 -     sulfobenzol-1-carbonsäure     werden in 2000 Teilen Wasser unter Zusatz  von Soda gelöst, mit 69 Teilen.     Natriumni-          trit    gemischt und bei Zimmertemperatur in  verdünnte Salzsäure einlaufen gelassen. Die  abgeschiedene     weissgraue        Diazoverbindung     wird danach in eine eiskalte bicarbonat-alka-    lische Lösung von 103 Teilen     3-Methyl-5-          pyrazolon    eingetragen.

   Nach beendeter  Kupplung wird der teilweise bereits     ausge-          scbiedene    Farbstoff völlig     ausgesalzen    und  abgesaugt.



  Process for the preparation of an azo dye. It has been found that a valuable azo dye which can be treated in substance or on the fiber with metal salts is obtained if the diazo compound of N- (3'-aminobenzenesalphonyl) -3-amino-2-oxy is used Coupling -5-sulfobenzene-1-carboxylic acid with 3-methyl-5-pyrazolone.



  The dyestuff obtained in this way dyes wool very evenly in greenish yellow shades which, by chroming, acquire very good fastness properties, in particular to light, washing and tumbling. The chromium compound produced in substance has excellent leveling properties and colors the animal fibers in very light, wash, milled and rub-fast colors.



  <I> Example: </I> 388 parts of N- (3'-aminobenzenesulfonyl) -3-amino-2-ogy-5-sulfobenzene-1-carboxylic acid are dissolved in 2000 parts of water with the addition of soda, with 69 parts. Sodium nitrite mixed and allowed to run into dilute hydrochloric acid at room temperature. The deposited white-gray diazo compound is then introduced into an ice-cold bicarbonate-alkali solution of 103 parts of 3-methyl-5-pyrazolone.

   After the coupling has ended, the dye, which has already partially separated out, is completely salted out and suctioned off.

Claims (1)

PATENTANSPRUCE Verfahren zur Herstellung eines chro- mierbaren Azofarbstoffes, dadurch gekenn zeichnet, dass man die Diazoverbindung der N-(3'-Aminobenzolsulf(Ynyl)-3 -amino-2-oxy- 5-sulfobenzol-l-carbonsäure mit 3-Methyl-5- pyrazolon kuppelt. Der so erhaltene Farbstoff färbt Wolle sehr gleichmässig in grünstichig gelben Tönen, die durch Nachchromieren sehr gute Echtheitseigenschaften, insbesondere gegen Licht, Waschen und Walken, erhalten. PATENT APPLICATION Process for the production of a chromable azo dye, characterized in that the diazo compound of N- (3'-aminobenzene sulf (Ynyl) -3 -amino-2-oxy-5-sulfobenzene-1-carboxylic acid with 3-methyl- The dyestuff thus obtained dyes wool very evenly in greenish yellow tones which, after chrome-plating, acquire very good fastness properties, in particular against light, washing and tumbling. Die in Substanz hergestellte Chromverbindung besitzt ein ganz hervorragendes Egalisier- vermögen und färbt die tierische Faser in sehr gut licht-; wasch-, walk- und reibech ten Farbtönen. The chromium compound produced in substance has a very excellent leveling ability and colors the animal fiber very well with light; Wash, mill and rub-fast colors.
CH180962D 1934-01-31 1934-12-20 Process for the preparation of an azo dye. CH180962A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE180962X 1934-01-31

Publications (1)

Publication Number Publication Date
CH180962A true CH180962A (en) 1935-11-30

Family

ID=5713685

Family Applications (1)

Application Number Title Priority Date Filing Date
CH180962D CH180962A (en) 1934-01-31 1934-12-20 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH180962A (en)

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