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CH159051A - Process for the preparation of a primary disazo dye. - Google Patents

Process for the preparation of a primary disazo dye.

Info

Publication number
CH159051A
CH159051A CH159051DA CH159051A CH 159051 A CH159051 A CH 159051A CH 159051D A CH159051D A CH 159051DA CH 159051 A CH159051 A CH 159051A
Authority
CH
Switzerland
Prior art keywords
dye
amino
preparation
blue
disazo dye
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 CH159051A publication Critical patent/CH159051A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B33/00Disazo and polyazo dyes of the types A->K<-B, A->B->K<-C, or the like, prepared by diazotising and coupling
    • C09B33/02Disazo dyes
    • C09B33/08Disazo dyes in which the coupling component is a hydroxy-amino compound
    • C09B33/10Disazo 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

  

      Zusatzpatent    zum Hauptpatent Nr. 155452.         Terfahren    zur     Darstellung    eines primären     Disazofarbstoffes.       und zur weiteren Kombination wieder in  Wasser und überschüssiger Soda gelöst, oder  es wird die ursprüngliche saure Kombinations  masse unmittelbar mit Natronlauge     bezw.     Soda neutralisiert und     hieraulf    mit überschüs  siger Soda versetzt.

   Zur alkalischen Lösung  des     Monoazofarbstoffes    lässt man sodann unter  gutem Rühren die aus 26,2 kg     1-Methyl-4-          amino-2-benzolsulfanilid    erhaltene     Diazolösung     bei<B>0-50</B> einfliessen. Nach Verlauf mehrerer  Stunden wird aufgewärmt, der Farbstoff aus  gesalzen,     abfiltriert    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.    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     Monoazofarb-          stoff    weiter in alkalischer Lösung mit der       Diazoverbindung    von     1-Methyl-4-amino-2-          benzolsulfanilid    kombiniert. Der neue Farb  stoff stellt ein bronzefarbiges Pulver dar,  welches sich in Wasser mit blauer, in kon  zentrierter Schwefelsäure mit grüner Farbe  löst.

   Er färbt auf Wolle und Seide ein Blau  schwarz von vorzüglicher     Walk-        bezw.    Was  serechtheit und sehr guter Lichtechtheit.       Beispiel:     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-          disulfosäure    eingetragen.

   Nachdem die in stark  saurer Lösung bei gewöhnlicher Temperatur  sich vollziehende Kupplung vollendet ist,  wird entweder der     Monoazofarbstoff    isoliert    Verfahren zur Darstellung eines neuen  primären     Disazofarbstoffes,    dadurch gekenn  zeichnet, dass man 1. 8     -Aminonaphthol    - 3 . 6-



      Additional patent to the main patent No. 155452. Terfahren for the representation of a primary disazo dye. and dissolved again in water and excess soda for further combination, or the original acidic combination mass is immediately BEZW with sodium hydroxide solution. Soda neutralized and then mixed with excess soda.

   The diazo solution obtained from 26.2 kg of 1-methyl-4-amino-2-benzenesulfanilide is then allowed to flow in at 0-50 to the alkaline solution of the monoazo dye, with thorough stirring. After several hours it 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 wool respectively. Waterfastness and very good lightfastness. It has been found that a valuable new primary disazo dye is obtained by 1.

   8-Aminonaphthol - 3 ..6 - disulfonic acid in acidic solution with the diazo compound of 1-chloro-2-amino-4-benzenesulfanilide and the monoazo dye thus obtained is further coupled in alkaline solution with the diazo compound of 1- Methyl 4-amino-2-benzenesulfanilide 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 of excellent milled or wool. What about fastness and very good lightfastness. Example: 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-amino-naphthol-3-6-disulfonic acid.

   After the coupling, which takes place in a strongly acidic solution at ordinary temperature, is complete, either the monoazo dye is isolated. Process for the preparation of a new primary disazo dye, characterized in that 1. 8 -aminonaphthol - 3. 6-

 

Claims (1)

PATENTANSPRUCH: disulfosäure in saurer Lösung mit der Diazo- verbindung von 1-Chlor-2-amino-9,-benzolsulf- aniIid kombiniert und den so erhaltenen 11'Iono- azofarbstoff sodann in alkalischer Lösung mit der Diazoverbindung aus 1-Methyl-4-amino- 2-benzolsulfanilid kuppelt. Der neue Farbstoff stellt ein bronzefarbiges Pulver dar, das sich in Wasser mit blauer, in konzentrierter Schwefelsäure mit grüner Farbe löst. PATENT CLAIM: disulfonic acid in acidic solution combined with the diazo compound of 1-chloro-2-amino-9, -benzenesulfaniIide and the 11'iono azo dye thus obtained then in alkaline solution with the diazo compound of 1-methyl-4- amino-2-benzenesulfanilide couples. 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. Er färbt auf Wolle und Seide ein Blauschwarz von vor züglicher Walk- bezw. Wasserechtheit und sehr guter Lichtechtheit. He dyes wool and silk a blue-black from brisk boiled or milled wool. Waterfastness and very good lightfastness.
CH159051D 1932-01-01 1932-01-01 Process for the preparation of a primary disazo dye. CH159051A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH155452T 1932-01-01
CH159051T 1932-01-01

Publications (1)

Publication Number Publication Date
CH159051A true CH159051A (en) 1932-12-15

Family

ID=25716583

Family Applications (1)

Application Number Title Priority Date Filing Date
CH159051D CH159051A (en) 1932-01-01 1932-01-01 Process for the preparation of a primary disazo dye.

Country Status (1)

Country Link
CH (1) CH159051A (en)

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