CH159048A - Process for the preparation of a primary disazo dye. - Google Patents

Process for the preparation of a primary disazo dye.

Info

Publication number
CH159048A
CH159048A CH159048DA CH159048A CH 159048 A CH159048 A CH 159048A CH 159048D A CH159048D A CH 159048DA CH 159048 A CH159048 A CH 159048A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
blue
disazo dye
wool
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH159048A publication Critical patent/CH159048A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B33/00—Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
    • C09B33/02—Disazo dyes
    • C09B33/08—Disazo dyes in which the coupling component is a hydroxy-amino compound
    • C09B33/10—Disazo dyes in which the coupling component is a hydroxy-amino compound in which the coupling component is an amino naphthol

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

      Terfahren    zur Darstellung eines primären     Disazofar        bstoffes.       Es wurde gefunden, dass man einen neuen  wertvollen primären     Disazofarbstoff    erhält,  wenn man     1.8-Aminonaphthol-3.6-disulfo-          säure    in saurer Lösung mit der     Diazoverbin-          dung    von     1-Chlor-2-amino-4-benzolsulfanilid     kuppelt und den so erhaltenen     AIonoazofarb-          stoff    weiter in alkalischer Lösung mit der       Diazoverbindung    von     o-Aminophenyl-o-tolyl-       <RTI  

   ID="0001.0014">   äther    kombiniert. Der neue Farbstoff stellt  ein bronzefarbiges Pulver dar, welches sich  in Wasser mit blauer, in konzentrierter Schwe  felsäure mit grüner Farbe löst. Er färbt auf  Wolle und Seide ein Blauschwarz von vor  züglicher Walk-     bezw.    Wasserechtheit und  sehr guter Lichtechtheit.  



  <I>Beispiel:</I>  Die aus 28,2 kg     1-Chlor-2-amino-4-benzol-          sulfanilid    erhaltene     Diazolösung    wird in 31,9 kg  frisch gefällte     1.8-Aminonaphthol-3.6-disulfo-          säure    eingetragen.

   Nachdem die in stark  saurer Lösung bei gewöhnlicher Temperatur  sich vollziehende Kupplung vollendet ist, wird  entweder der     Monoazofarbstoff    isoliert und    zur weiteren Kombination wieder in Wasser,  überschüssiger Soda und 20 kg Ammoniak       (25%)        gelöst,        oder        es        wird        die        ursprüngliche     saure     Kombinationsmasse    unmittelbar mit  Natronlauge     bezw.    Soda neutralisiert und  hierauf mit überschüssiger Soda und 20 kg       Ammoniak        (25        %)

          versetzt.        Zur        alkalischen     Lösung des     DIonoazofarbstoffes    lässt man so  dann unter gutem Rühren die aus 19,9 kg       o-Aminophenyl-o-tolyläther    erhaltene     Diazo-          lösung    unter gutem Rühren bei 0-50 ein  fliessen. Nach Verlauf mehrerer Stunden wird  aufgewärmt, der Farbstoff     ausgesalzen,    ab  filtriert und getrocknet.  



  Der erhaltene Farbstoff bildet ein bronze  farbiges Pulver, das in Wasser mit blauer,  in konzentrierter Schwefelsäure mit grüner  Farbe löslich ist. Er färbt auf Wolle und  Seide ein Blauschwarz von vorzüglicher     Walk-          bezw.    Wasserechtheit und sehr guter Licht  echtheit.



      Terfahren for the representation of a primary disazo dye. It has been found that a new valuable primary disazo dye is obtained if 1,8-aminonaphthol-3,6-disulfonic acid is coupled in acidic solution with the diazo compound of 1-chloro-2-amino-4-benzenesulfanilide and the thus obtained aonoazo color is coupled - substance further in alkaline solution with the diazo compound of o-aminophenyl-o-tolyl- <RTI

   ID = "0001.0014"> ether combined. The new dye is a bronze-colored powder that dissolves in water with a blue color and in concentrated sulfuric acid with a green color. He dyes wool and silk a blue-black from brisk boiled or milled wool. Waterfastness and very good lightfastness.



  <I> Example: </I> The diazo solution obtained from 28.2 kg of 1-chloro-2-amino-4-benzenesulfanilide is introduced into 31.9 kg of freshly precipitated 1,8-aminonaphthol-3,6-disulfonic acid.

   After the coupling, which takes place in a strongly acidic solution at normal temperature, is complete, either the monoazo dye is isolated and dissolved again in water, excess soda and 20 kg of ammonia (25%) for further combination, or the original acidic combination mass is immediately mixed with sodium hydroxide solution respectively Soda neutralized and then with excess soda and 20 kg ammonia (25%)

          offset. The diazo solution obtained from 19.9 kg of o-aminophenyl-o-tolyl ether is then allowed to flow into the alkaline solution of the dionoazo dye with thorough stirring at 0-50. After several hours, the mixture is warmed up, the dye is salted out, filtered off and dried.



  The dye obtained forms a bronze-colored powder which is soluble in water with a blue color and in concentrated sulfuric acid with a green color. He dyes wool and silk a blue-black of exquisite milled or wool. Waterfastness and very good lightfastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines neuen primären Disazofarbstoffes, dadurch gekenn- zeichnet, dass man 1. 8-Aminonaphthol-3 . G- disulfosäure in saurer Lösung mit der Diazo- verbindung von 1-Chlor-2-amino-4-benzolsulf- anilid kombiniert und den so erhaltenen Mono azofarbstoff sodann in alkalischer Lösung mit der Diazoverbindung aus o-Aminophenyl-o- tolyläther kuppelt. PATENT CLAIM: Process for the preparation of a new primary disazo dye, characterized in that 1. 8-aminonaphthol-3. G-disulfonic acid combined in acidic solution with the diazo compound of 1-chloro-2-amino-4-benzenesulfanilide and then coupled the mono azo dye thus obtained in alkaline solution with the diazo compound from o-aminophenyl-o-tolyl ether. Der neue Farbstoff stellt ein bronzefarbiges Pulver dar, das sich in Wasser mit blauer, in konzentrierter Schwe felsäure mit grüner Farbe löst. Er färbt auf Wolle und Seide ein Blauschwarz von vor züglicher Walk- bezw. Wasserechtheit und sehr guter Lichtechtheit. The new dye is a bronze-colored powder that dissolves in water with a blue color and in concentrated sulfuric acid with a green color. He dyes wool and silk a blue-black from brisk boiled or milled wool. Waterfastness and very good lightfastness.
CH159048D 1931-10-11 1931-10-11 Process for the preparation of a primary disazo dye. CH159048A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH159048T 1931-10-11
CH155452T 1932-01-01

Publications (1)

Publication Number Publication Date
CH159048A true CH159048A (en) 1932-12-15

Family

ID=25716580

Family Applications (1)

Application Number Title Priority Date Filing Date
CH159048D CH159048A (en) 1931-10-11 1931-10-11 Process for the preparation of a primary disazo dye.

Country Status (1)

Country Link
CH (1) CH159048A (en)

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