CH170768A - Process for the preparation of a substantive copper-containing azo dye. - Google Patents

Process for the preparation of a substantive copper-containing azo dye.

Info

Publication number
CH170768A
CH170768A CH170768DA CH170768A CH 170768 A CH170768 A CH 170768A CH 170768D A CH170768D A CH 170768DA CH 170768 A CH170768 A CH 170768A
Authority
CH
Switzerland
Prior art keywords
copper
substantive
preparation
azo dye
containing azo
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie 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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH170768A publication Critical patent/CH170768A/en

Links

Description

  

  Verfahren zur Darstellung eines     substantiven    kupferhaltigen     Azofarbstoffes.       Es wurde gefunden, dass man     substantive     kupferhaltige     Azofarbstoffe    erhält, wenn man       Trisazofarbstoffe    der allgemeinen Formel  
EMI0001.0006     
    worin     Ri    beliebig substituiert sein kann und       R2    den Rest einer Komponente der     Benzol-          oder        Naphthalinreihe,    welche mindestens eine       Sulfonsäuregruppe    enthält, bedeutet, unter  solchen Bedingungen mit kupferabgebenden  Mitteln behandelt,

   dass die in     Ri    in     o-Stellung     zur     Azobrücke    befindliche     Methoxylgruppe     gespalten wird.  



  Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines kupfer  haltigen     Trisazofarbstoffes.    Es besteht darin,  dass man den     Azofarbstoff    der Formel  
EMI0001.0019     
    mit einem kupferabgebenden Mittel unter  solchen Bedingungen behandelt, dass die       Methoxygruppen    aufgespalten werden.  



       Beispiel,   <I>;</I>  100 Gewichtsteile des Farbstoffes der  Formel  
EMI0001.0022     
      werden in 2500 Gewichtsteilen Wasser gelöst  und auf<B>850</B> erwärmt. Dann versetzt man  unter Rühren mit einer Lösung von 33 Ge  wichtsteilen kristallisiertem Kupfersulfat und       100        Gewichtsteilen        25        %igem        Ammoniak        in          250    Gewichtsteilen Wasser. Die     Mischung     wird dann noch 12 Stunden bei 80-90 0  gerührt. Man erhält einen Farbstoff, der  Baumwolle in blauen Tönen anfärbt.



  Process for the preparation of a substantive copper-containing azo dye. It has been found that substantive copper-containing azo dyes are obtained if trisazo dyes of the general formula
EMI0001.0006
    where Ri can be substituted as desired and R2 is the remainder of a component of the benzene or naphthalene series, which contains at least one sulfonic acid group, treated under such conditions with copper-releasing agents,

   that the methoxyl group in Ri in o-position to the azo bridge is cleaved.



  The subject of the present patent is a process for the production of a copper-containing trisazo dye. It consists in getting the azo dye of the formula
EMI0001.0019
    treated with a copper donor under such conditions that the methoxy groups are split.



       Example, <I>; </I> 100 parts by weight of the dye of the formula
EMI0001.0022
      are dissolved in 2500 parts by weight of water and heated to <B> 850 </B>. Then, while stirring, a solution of 33 parts by weight of crystallized copper sulfate and 100 parts by weight of 25% ammonia in 250 parts by weight of water is added. The mixture is then stirred at 80-90 ° for a further 12 hours. A dye is obtained which dyes cotton in blue tones.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines kupfer haltigen Trisazofarbstoffes, dadurch gekenn zeichnet, dass man den Azofarbstoff der Formel , EMI0002.0012 reit einem kupferabgebenden Mittel unter solchen Bedingungen behandelt, dass die Methoxygruppen aufgespalten werden. Der erhaltene neue Farbstoff färbt Baumwolle in blauen Tönen an. PATENT CLAIM: Process for the production of a copper-containing trisazo dye, characterized in that the azo dye of the formula EMI0002.0012 treated with a copper donor under such conditions that the methoxy groups are broken down. The new dye obtained stains cotton in blue tones.
CH170768D 1932-09-23 1933-08-19 Process for the preparation of a substantive copper-containing azo dye. CH170768A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE170768X 1932-09-23
CH170768T 1933-08-19

Publications (1)

Publication Number Publication Date
CH170768A true CH170768A (en) 1934-07-31

Family

ID=25718980

Family Applications (1)

Application Number Title Priority Date Filing Date
CH170768D CH170768A (en) 1932-09-23 1933-08-19 Process for the preparation of a substantive copper-containing azo dye.

Country Status (1)

Country Link
CH (1) CH170768A (en)

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