CH303911A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH303911A
CH303911A CH303911DA CH303911A CH 303911 A CH303911 A CH 303911A CH 303911D A CH303911D A CH 303911DA CH 303911 A CH303911 A CH 303911A
Authority
CH
Switzerland
Prior art keywords
disazo dye
preparation
oxy
parts
good
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Sandoz
Original Assignee
Ag Sandoz
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 Ag Sandoz filed Critical Ag Sandoz
Publication of CH303911A publication Critical patent/CH303911A/en

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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

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

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 301446.    Verfahren     zur        Herstellung    eines     Disazofarbstoffes.       Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines     Disazo-          farbstoffes,    welches darin besteht, dass man  2 -Hol der     Diazov        erbindung    aus     2-Amino-l-          oxy-4-nitrobenzol    mit 1     Mol        Fumarsäure-di-          [5-oxy-7-sulfonaphthyl-(2)]-amid    kuppelt.  



  Im     naehfolgenden    Beispiel bedeuten die  Teile Gewichtsteile, und die Prozente sind in       Gewichtsprozenten    angegeben.  



  <I>Beispiel.:</I>  34 Teile     2-Amino-l-oxy-4-nitrobenzol        (da-          @on    3,2 Teile     L?berschuss)    werden     diazotiert.     Man giesst die     Diazosuspension    innerhalb von  2 Stunden zu einer Lösung von 55,8 Teilen       Fumarsäure-di-    [5 -     oxy        -7-sulfonaphthyl-    (2) ]     -          amid    in 2000 Teilen Wasser,

   40 Teilen Na  triumhydroxydlösung 30      /o        ig    und 120 Teilen       Pyridin.    Nach einiger Zeit scheidet das Kupp  lungsprodukt in kristalliner Form aus. Er  wird     abfiltriert    und getrocknet.    Der neue     Disazofarbstoff    ist ein dunkles  Pulver, das sich in konzentrierter Schwefel  säure mit blauroter Farbe löst und Baumwolle  und Fasern aus regenerierter     Cellulose    im       Nachkupferungsverfahren    in     bordeauxroten     Tönen von sehr guter Lichtechtheit und guter  Waschechtheit färbt.



  <B> Additional patent </B> to main patent no. 301446. Process for the production of a disazo dye. The subject of the present patent is a process for the preparation of a disazo dye, which consists in that 2 -hol of the Diazov compound from 2-amino-l-oxy-4-nitrobenzene with 1 mole of fumaric acid-di- [5-oxy- 7-sulfonaphthyl- (2)] - amide couples.



  In the example below, the parts are parts by weight and the percentages are percentages by weight.



  <I> Example: </I> 34 parts of 2-amino-1-oxy-4-nitrobenzene (3.2 parts of excess L) are diazotized. The diazo suspension is poured over the course of 2 hours into a solution of 55.8 parts of di- [5-oxy-7-sulfonaphthyl- (2)] amide in 2000 parts of water,

   40 parts of sodium hydroxide solution 30% and 120 parts of pyridine. After a while, the coupling product separates out in crystalline form. It is filtered off and dried. The new disazo dye is a dark powder that dissolves in concentrated sulfuric acid with a blue-red color and dyes cotton and fibers made of regenerated cellulose in the post-coppering process in burgundy shades of very good lightfastness and good washfastness.

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man 2 Mol der Diazoverbindung aus 2-Amino-l- oxy-4-nitrobenzol mit 1 Mol Fumarsäure-di- [5-oxy-7-sulfonaphthyl-(2)]-amid kuppelt. PATENT CLAIM Process for the preparation of a disazo dye, characterized in that 2 moles of the diazo compound from 2-amino-l-oxy-4-nitrobenzene with 1 mole of fumaric acid-di- [5-oxy-7-sulfonaphthyl- (2)] -amid couples. Der neue Disazofarbstoff ist ein dunkles Pulver, das sich in konzentrierter Schwefel säure mit blauroter Farbe löst und Baumwolle und Fasern aus regenerierter Cellulose im Nachkupferungsverfahren in bordeauxroten Tönen von sehr guter Lichtechtheit und guter Waschechtheit färbt. The new disazo dye is a dark powder that dissolves in concentrated sulfuric acid with a blue-red color and dyes cotton and fibers made of regenerated cellulose in the post-coppering process in burgundy shades of very good lightfastness and good washfastness.
CH303911D 1952-01-17 1952-01-17 Process for the preparation of a disazo dye. CH303911A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH303911T 1952-01-17
CH301446T 1952-01-17

Publications (1)

Publication Number Publication Date
CH303911A true CH303911A (en) 1954-12-15

Family

ID=25734396

Family Applications (1)

Application Number Title Priority Date Filing Date
CH303911D CH303911A (en) 1952-01-17 1952-01-17 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH303911A (en)

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