CH332043A - Process for the preparation of a disazo dye - Google Patents

Process for the preparation of a disazo dye

Info

Publication number
CH332043A
CH332043A CH332043DA CH332043A CH 332043 A CH332043 A CH 332043A CH 332043D A CH332043D A CH 332043DA CH 332043 A CH332043 A CH 332043A
Authority
CH
Switzerland
Prior art keywords
disazo dye
parts
formula
preparation
water
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 CH332043A publication Critical patent/CH332043A/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       Gegenstand der vorliegenden Erfindung  ist ein Verfahren zur Herstellung eines     Dis-          azofarbstoffes,    welches darin besteht, dass man    1     Mol    der     Diazoverbindung    aus der     Amino-          inonoazoverbindung    der Formel  
EMI0001.0011     
    mit 1     Mol    der     2-Aeetylamino-5-oxynaphthalin-7-sulfonsäure,    der Formel    kuppelt.

    Im nachstehenden Beispiel bedeuten die  Teile     Gewiehtsteile;    die Temperaturen sind  in Celsiusgraden angegeben.  



  <I>Beispiel</I>  39 Teile der     Aminomonoazoverbindung    der  Formel (I) werden in 500 Teilen Wasser und  7 0 Teilen konzentrierter Natronlauge gelöst.  Man setzt dieser Lösung bei 10" nacheinander  7 Teile     Natriumnitrit    und 40 Teile     konzen-          frierte    Salzsäure zu. Die entstandene Suspen  sion wird während 1-2 Stunden bei 10  ge  rührt. Die gebildete     Diazoverbindung    lässt  man alsdann zu einer Lösung von 35,9 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 main patent no. 285140 Process for the production of a disazo dye The present invention relates to a process for the production of a disazo dye, which consists in converting 1 mol of the diazo compound from the amino inonoazo compound of the formula
EMI0001.0011
    with 1 mole of 2-ethylamino-5-oxynaphthalene-7-sulfonic acid, of the formula couples.

    In the example below, the parts mean parts by weight; the temperatures are given in degrees Celsius.



  <I> Example </I> 39 parts of the aminomonoazo compound of the formula (I) are dissolved in 500 parts of water and 70 parts of concentrated sodium hydroxide solution. 7 parts of sodium nitrite and 40 parts of concentrated hydrochloric acid are successively added to this solution at 10 ". The resulting suspension is stirred for 1-2 hours at 10. The diazo compound formed is then allowed to form a solution of 35.9 parts of the 2-Acylamino-5-oxynaphthalene-7-sulfonic acid of the formula (II) and 50 parts of sodium carbonate flow 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- monoazoverbindung der Formel EMI0001.0034 EMI0002.0001 mit 1 112o1 der 2-Acylamino-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 monoazo compound of the formula EMI0001.0034 EMI0002.0001 with 1 112o1 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 -Lind färbt Baumwolle und Fasern aus regene- rierter Cellulose in scharlachroten Tönen, wel che durch Nachkupfern licht-, wasch- und schweisseeht werden. The new disazo dye is a red-brown powder that dissolves in water with a red color - lind dyes cotton and fibers made of regenerated cellulose in scarlet shades, which can be seen light, wash and sweat by re-coppering.
CH332043D 1950-07-06 1954-03-05 Process for the preparation of a disazo dye CH332043A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH285140T 1950-07-06
CH332043T 1954-03-05

Publications (1)

Publication Number Publication Date
CH332043A true CH332043A (en) 1958-08-15

Family

ID=25732501

Family Applications (1)

Application Number Title Priority Date Filing Date
CH332043D CH332043A (en) 1950-07-06 1954-03-05 Process for the preparation of a disazo dye

Country Status (1)

Country Link
CH (1) CH332043A (en)

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