CH175883A - Process for the preparation of a substantive copper-containing azo dye. - Google Patents

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

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Publication number
CH175883A
CH175883A CH175883DA CH175883A CH 175883 A CH175883 A CH 175883A CH 175883D A CH175883D A CH 175883DA CH 175883 A CH175883 A CH 175883A
Authority
CH
Switzerland
Prior art keywords
copper
substantive
preparation
azo dye
dye
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 CH175883A publication Critical patent/CH175883A/en

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Description

  

  Verfahren zur     Darstellung    eines     substantiven    kupferhaltigen     Azofarbstofl'es.       Es wurde gefunden, dass man     substantive     kupferhaltige     Azofarbstoffe    erhält, wenn  man     Trisazofa.rbstoffe    der allgemeinen Formel  
EMI0001.0007     
    worin     R1    beliebig     substitutiert    sein kann und       R.    den Rest einer Komponente der Benzol-    oder     Naphthalinreihe,    welche mindestens eine       Sulfonsäuregruppe    enthält, bedeutet,

   unter       olchen    Bedingungen mit kupferabgebenden       Mitteln    behandelt, dass die     in        R,    in     o-Stel-          lung    zur     Azobrücke    befindliche     Methoxyl-          gruppe    gespalten     wird.     



  Gegenstand des vorliegenden Patentes ist  ein Verfahren zur Herstellung eines     substan-          tiven    kupferhaltigen     Trisazofarbstoffes.    Es  besteht darin, dass man den Farbstoff der  Formel  
EMI0001.0026     
    mit einem     kupferabgebenden    Mittel unter  solchen Bedingungen behandelt,     dass    -die     Me-          thoxygruppen    aufgespalten werden.

      <I>Beispiel:</I>  107 Gewichtsteile des Farbstoffes der  Formel    
EMI0002.0001     
    werden mit 1500     Gewichtsteilen    heissem  Wasser, 40 Gewichtsteilen kristallisiertem  Kupfersulfat und 40 Gewichtsteilen kristal  lisiertem     Natriumacetat    im Autoklauen un  ter 5 Stunden auf 120     bis    130   erhitzt. Der  so entstandene     kupferhaltige    Farbstoff färbt  Baumwolle in blauen Tönen.



  Process for the preparation of a substantive copper-containing azo dye. It has been found that substantive copper-containing azo dyes are obtained if trisazofa dyes of the general formula
EMI0001.0007
    where R1 can be substituted as desired and R. 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 so that the methoxyl group in R, in o-position to the azo bridge is cleaved.



  The subject matter of the present patent is a process for the production of a substantial copper-containing trisazo dye. It consists in getting the dye of the formula
EMI0001.0026
    Treated with a copper-releasing agent under such conditions that the methoxy groups are split up.

      <I> Example: </I> 107 parts by weight of the dye of the formula
EMI0002.0001
    are heated with 1500 parts by weight of hot water, 40 parts by weight of crystallized copper sulfate and 40 parts by weight of crystallized sodium acetate in the car claw under 5 hours to 120 to 130. The resulting copper-containing dye dyes cotton in blue tones.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines substan- tiven kupferhaltigen Trisazofarbstoffes, da durch gekennzeichnet, dass man den Azofarb- stoff der Formel EMI0002.0014 mit einem kupferabgebenden Mittel unter sol chen Bedingungen behandelt, da,ss die 14Te- thoxygruppen aufgespalten werden. Der er- haltene neue Farbstoff färbt Baumwolle in blauen Tönen an. PATENT CLAIM: Process for the production of a substantial copper-containing trisazo dye, characterized in that the azo dye of the formula EMI0002.0014 treated with a copper-releasing agent under such conditions that the 14-thoxy groups are split up. The new dye obtained stains cotton in blue tones.
CH175883D 1932-09-23 1933-08-19 Process for the preparation of a substantive copper-containing azo dye. CH175883A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE175883X 1932-09-23
CH170768T 1933-08-19

Publications (1)

Publication Number Publication Date
CH175883A true CH175883A (en) 1935-03-15

Family

ID=25718983

Family Applications (1)

Application Number Title Priority Date Filing Date
CH175883D CH175883A (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) CH175883A (en)

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