CH332044A - Process for the preparation of a disazo dye - Google Patents

Process for the preparation of a disazo dye

Info

Publication number
CH332044A
CH332044A CH332044DA CH332044A CH 332044 A CH332044 A CH 332044A CH 332044D A CH332044D A CH 332044DA CH 332044 A CH332044 A CH 332044A
Authority
CH
Switzerland
Prior art keywords
disazo dye
formula
preparation
parts
red
Prior art date
Application number
Other languages
German (de)
Inventor
Hans Dr Ischer
Original Assignee
Sandoz 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 Sandoz Ag filed Critical Sandoz Ag
Publication of CH332044A publication Critical patent/CH332044A/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
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/02—Disazo dyes
    • C09B35/039—Disazo dyes characterised by the tetrazo component
    • C09B35/28—Disazo dyes characterised by the tetrazo component the tetrazo component containing two aryl nuclei linked by at least one of the groups —CON<, —SO2N<, —SO2—, or —SO2—O—

Landscapes

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

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 285140    Verfahren     zur        Herstellung        eines        Disazofarbstoffes            Clegenstand    der vorliegenden Erfindung  ist ein Verfahren zur Herstellung eines     Dis-          azofarbstoffes,welches    darin besteht,

   dass man    1     Mol    der     Diazoverbindung    aus der     Amino-          monoazoverbindung    der Formel  
EMI0001.0013     
    mit 1     Mol    der     2-Acylamino-5-oxynaphthalin-7-sulfonsäure    der Formel  
EMI0001.0016     
    kuppelt.  Im nachstehenden, Beispiel bedeuten die  Teile Gewichtsteile; die Temperaturen sind  in Celsiusgraden angegeben.         .Beispiel     39 Teile der     Aminomonoazoverbindung    der  Formel (I) werden in 500 Teilen Wasser  und 1.0 Teilen     konzentrierter    Natronlauge ge  löst.

   Man setzt dieser Lösung bei 10  nachein  ander 7 Teile     Natriumnitrit    und 40 Teile kon  zentrierte Salzsäure zu. Die entstandene Sus  pension wird während 1-2 Stunden bei 10   gerührt. Die gebildete     Diazoverbindung    lässt  man alsdann zu einer Lösung von 50,5 Teilen  der 2-     Acylamino-5-oxynaphthalin-7-sulfon-          säure    der Formel     (II)    und 50 Teilen Natrium-         carbonat    in 400 Teilen Wasser fliessen. Die  Kupplung erfolgt sehr rasch. Nach dreistün  digem Rühren wird der Farbstoff aus der  Reaktionslösung     ausgesalzen,        abfiltriert    und  bei 90  im Vakuum getrocknet.  



  Der neue     Disazofarbstoff    ist ein rotbraunes  Pulver, löst sich in Wasser mit roter Farbe  und färbt Baumwolle und Fasern aus regene  rierter     Cellulose    in scharlachroten Tönen, wel  che durch Nachkupfern licht-, wasch- und  schweissecht werden.



      Additional patent to the main patent no. 285140 Process for the production of a disazo dye The present invention is a process for the production of a disazo dye, which consists in

   that one mole of the diazo compound from the amino monoazo compound of the formula
EMI0001.0013
    with 1 mole of 2-acylamino-5-oxynaphthalene-7-sulfonic acid of the formula
EMI0001.0016
    clutch. In the following example, the parts are parts by weight; the temperatures are given in degrees Celsius. Example 39 parts of the aminomonoazo compound of the formula (I) are dissolved in 500 parts of water and 1.0 part of concentrated sodium hydroxide solution.

   This solution is set at 10 in succession to 7 parts of sodium nitrite and 40 parts of concentrated hydrochloric acid. The resulting suspension is stirred at 10 for 1-2 hours. The diazo compound formed is then allowed to flow into a solution of 50.5 parts of 2-acylamino-5-oxynaphthalene-7-sulfonic acid of the formula (II) and 50 parts of sodium carbonate in 400 parts of water. The coupling takes place very quickly. After three hours of stirring, the dye is salted out from the reaction solution, filtered off and dried at 90 ° in vacuo.



  The new disazo dye is a reddish-brown powder that dissolves in water with a red color and dyes cotton and fibers made from regenerated cellulose in scarlet shades, which are made light, wash and perspiration-proof by re-coppering.

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines Disazo- farbstoffes, dadurch gekennzeichnet, dass man 1 Mol der Diazoverbindung aus der Amino- monoa.zoverbindung der Formel EMI0002.0001 mit 1 Mol der 2-Acylam.ino-5-oxynaphthalin-7-sulfonsäure der Formel EMI0002.0004 kuppelt. PATENT CLAIM Process for the preparation of a disazo dye, characterized in that 1 mol of the diazo compound is obtained from the amino monoa.zo compound of the formula EMI0002.0001 with 1 mole of 2-acylamino-5-oxynaphthalene-7-sulfonic acid of the formula EMI0002.0004 clutch. Der neue Disazofarbstoff ist ein rotbraunes Pulver, löst sich in Wasser mit roter Farbe und färbt Baumwolle und Fasern aus regene- rierter Cellulose in seharlaehroten Tönen, wel- ehe dureh Naehkupfern lieht-, wasch- und sehweissecht werden. The new disazo dye is a red-brown powder that dissolves in water with a red color and dyes cotton and fibers made of regenerated cellulose in shades of blue red, which can be lent, washed and whitewashed by sewing copper.
CH332044D 1950-07-06 1954-03-05 Process for the preparation of a disazo dye CH332044A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH285140T 1950-07-06
CH332044T 1954-03-05

Publications (1)

Publication Number Publication Date
CH332044A true CH332044A (en) 1958-08-15

Family

ID=25732502

Family Applications (1)

Application Number Title Priority Date Filing Date
CH332044D CH332044A (en) 1950-07-06 1954-03-05 Process for the preparation of a disazo dye

Country Status (1)

Country Link
CH (1) CH332044A (en)

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