CH175884A - 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
CH175884A
CH175884A CH175884DA CH175884A CH 175884 A CH175884 A CH 175884A CH 175884D A CH175884D A CH 175884DA CH 175884 A CH175884 A CH 175884A
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 CH175884A publication Critical patent/CH175884A/en

Links

Description

  

  Verfuhren zur Darstellung eines     substantiven        kupferhaltigen        Azofarbstoffes.            Ewurde    gefunden, dass man     substantive          kupferhaltige        Azofarbstoffe    erhält, wenn  man     Trisazofarbstoffe    der allgemeinen For  mel  
EMI0001.0009     
    worin R, 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     Rn    in     o-Stel-          lung    zur     Azobrücke    befindliche     Methogyl-          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  
EMI0001.0029     
    mit einem kupferabgebenden Mittel unter  solchen Bedingungen behandelt, dass die     Me-          thogygruppen    aufgespalten werden.

           Beispiel:          1$2    Gewichtsteile des Farbstoffes der  Formel    
EMI0002.0001     
    werden mit 1800     Gewichtsteilen    Wasser, 300  Gewichtsteilen     Pyridin    und 60 Gewichts  teilen kristallisiertem Kupfersulfat 12     Stun-          .den    unter Rühren am     Rüekflusskühler    ge  kocht. Man erhält einen Farbstoff der Baum  wolle in blaugrauen Tönen anfärbt.



  Procedures for the representation 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
EMI0001.0009
    where R 1 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,

   means treated with copper-releasing agents under such conditions that the methogyl group in Rn in the o-position to the azo bridge is cleaved.



  The subject 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
EMI0001.0029
    treated with a copper releasing agent under such conditions that the methogy groups are split up.

           Example: 1 $ 2 parts by weight of the dye of the formula
EMI0002.0001
    are boiled with 1800 parts by weight of water, 300 parts by weight of pyridine and 60 parts by weight of crystallized copper sulfate for 12 hours with stirring on a reflux condenser. A dye is obtained which dyes cotton in blue-gray tones.

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines substan- tiven kupferhaltigen, Trisazofarbstoffes, da- dureh gekennzeichnet, dass man den Azofarb- stoff der Formel EMI0002.0016 mit einem kupferabgebenden Mittel unter solchen Bedingungen behandelt, dass die Me- thogygruppen aufgespalten werden. Der er- haltere neue Farbstoff färbt Baumwolle in blaugrauen Tönen an. PATENT CLAIM Process for the production of a substantial copper-containing, trisazo dye, characterized in that the azo dye of the formula EMI0002.0016 treated with a copper releasing agent under such conditions that the methogy groups are split up. The new dye obtained dyes cotton in blue-gray tones.
CH175884D 1932-09-23 1933-08-19 Process for the preparation of a substantive copper-containing azo dye. CH175884A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE175884X 1932-09-23
CH170768T 1933-08-19

Publications (1)

Publication Number Publication Date
CH175884A true CH175884A (en) 1935-03-15

Family

ID=25718984

Family Applications (1)

Application Number Title Priority Date Filing Date
CH175884D CH175884A (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) CH175884A (en)

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