CH262170A - Process for the preparation of a brown polyazo dye. - Google Patents

Process for the preparation of a brown polyazo dye.

Info

Publication number
CH262170A
CH262170A CH262170DA CH262170A CH 262170 A CH262170 A CH 262170A CH 262170D A CH262170D A CH 262170DA CH 262170 A CH262170 A CH 262170A
Authority
CH
Switzerland
Prior art keywords
mole
brown
dye
mol
preparation
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 CH262170A publication Critical patent/CH262170A/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
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/38—Trisazo dyes ot the type
    • C09B35/40—Trisazo dyes ot the type the component K being a dihydroxy or polyhydroxy compound

Landscapes

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

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent Nr. 255411.    Verfahren zur Herstellung eines braunen     Polyazofarbstoffes.       Das vorliegende Patent betrifft ein Ver  fahren zur Herstellung eines braunen     Poly-          azofarbstoffes    und ist dadurch gekennzeich  net, dass man 1     Mol        Resorcin,    1     Mol    der Ver  bindung,

   erhältlich durch Verseifen und     Di-          azotieren    des Farbstoffes aus 1     Mol        diazotier-          ter        Naphthionsäure    und 1     Mol        1-Methyl-3-          acetamino-4-oxybenzol,    und 1     Mol    der aus  1     Mol        tetrazotiertem        Benzidin    und 1     Mol        Sali-          zylsäure    erhältlichen Zwischenverbindung  aufeinander einwirken lässt.

           .Beispiel:     Man vereinigt eine wie üblich hergestellte       Diazoverbindung    von 22,3g     Naphthionsäure     mit einer Lösung von 16,5 g     1-Methyl-3-acet-          amino-4-oxybenzol,    13,3 g 30%iger Natron  lauge und Wasser in Gegenwart von Soda.  Der     Monoazofarbstoff    wird mit Kochsalz ab  geschieden und durch mehrstündiges Erwär  men mit verdünnter Schwefelsäure verseift.  Nach Erkalten wird der     Monoazofarbstoff,     der die mutmassliche Formel  
EMI0001.0030     
    besitzt, filtriert und mit Wasser ausgewa  schen.

   Er wird in Wasser und Natronlauge  gelöst, mit 7 g     Natriumnitrit    versetzt und un  ter gutem Rühren bei niedriger Temperatur    in Salzsäure eingetropft. Nach beendeter     Di-          a.zotierung    kuppelt man mit einer     sodaalkali-          schen    Lösung von 11g     Resorcin.    Der     Disazo-          farbstoff    wird durch Zusatz von Salzsäure  abgeschieden. Er wird in Soda und Wasser  gelöst und mit der wie üblich hergestellten  Zwischenverbindung aus 18,4 g     Benzidin    und  13,8 g     Salizylsäure    gekuppelt.

   Der     Tetrakis-          azofarbstoff    wird in der Wärme mit Kochsalz  abgeschieden. Er stellt ein dunkles Pulver dar  und färbt Baumwolle in rotbraunen Tönen,  die nach Behandlung mit Kupfersalzen braun  werden. Die Wasch-, Licht- und     Alkalieclit-          lieiten    werden dabei erheblich verbessert.



  <B> Additional patent </B> to main patent no. 255411. Process for the production of a brown polyazo dye. The present patent relates to a process for the production of a brown poly azo dye and is characterized in that 1 mole of resorcinol, 1 mole of the compound,

   obtainable by saponifying and diazotizing the dye from 1 mole of diazotized naphthionic acid and 1 mole of 1-methyl-3-acetamino-4-oxybenzene, and 1 mole of the intermediate compound obtainable from 1 mole of tetrazotized benzidine and 1 mole of salicylic acid interact leaves.

           Example: A conventionally prepared diazo compound of 22.3 g of naphthionic acid is combined with a solution of 16.5 g of 1-methyl-3-acetamino-4-oxybenzene, 13.3 g of 30% strength sodium hydroxide solution and water in the presence of soda. The monoazo dye is separated with common salt and saponified with dilute sulfuric acid by heating for several hours. After cooling down, the monoazo dye, which has the presumed formula
EMI0001.0030
    owns, filtered and washed out with water.

   It is dissolved in water and sodium hydroxide solution, 7 g of sodium nitrite are added and the mixture is added dropwise to hydrochloric acid at low temperature, stirring thoroughly. After the end of the dipoting, coupling is carried out with a soda-alkaline solution of 11 g of resorcinol. The disazo dye is deposited by adding hydrochloric acid. It is dissolved in soda and water and coupled with the intermediate compound prepared as usual from 18.4 g of benzidine and 13.8 g of salicylic acid.

   The tetrakis azo dye is deposited in the heat with common salt. It is a dark powder and dyes cotton in red-brown tones, which turn brown after treatment with copper salts. The wash, light and alkali class are considerably improved.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines braunen Polyazofarbstoffes, dadurch gekennzeichnet, dass man 1 Mol Resorcin, 1 Mol der Verbin dung, erhältlich durch Verseifen und Diazo- tieren des Farbstoffes aus 1 Mol diazotierter Naphthionsäure und 1 Mol 1-Methyl-3-acet, amino-4-oxybenzol, PATENT CLAIM: Process for the production of a brown polyazo dye, characterized in that 1 mole of resorcinol, 1 mole of the compound obtainable by saponification and diazotization of the dye from 1 mole of diazotized naphthionic acid and 1 mole of 1-methyl-3-acet, amino -4-oxybenzene, und 1 Mol der aus 1 Mol tetrazotiertem Benzidin und 1 Mol Salizyl- säure erhältlichen Zwischenverbindung auf einander einwirken lässt. Der neue Farbstoff stellt ein dunkles Pul ver dar und färbt Baumwolle in rotbraunen Tönen, die nach Behandlung mit Kupfersal zen braun werden. Die Wasch-, Licht- und Alkaliechtheiten werden dabei erheblich ver bessert. and 1 mol of the intermediate compound obtainable from 1 mol of tetrazotized benzidine and 1 mol of salicylic acid is allowed to act on one another. The new dye is a dark powder and dyes cotton in red-brown shades that turn brown after treatment with copper salts. The wash, light and alkali fastness properties are considerably improved.
CH262170D 1943-07-02 1943-07-02 Process for the preparation of a brown polyazo dye. CH262170A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH262170T 1943-07-02
CH255411T 1948-06-30

Publications (1)

Publication Number Publication Date
CH262170A true CH262170A (en) 1949-06-15

Family

ID=25729898

Family Applications (1)

Application Number Title Priority Date Filing Date
CH262170D CH262170A (en) 1943-07-02 1943-07-02 Process for the preparation of a brown polyazo dye.

Country Status (1)

Country Link
CH (1) CH262170A (en)

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