CH175882A - 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
CH175882A
CH175882A CH175882DA CH175882A CH 175882 A CH175882 A CH 175882A CH 175882D A CH175882D A CH 175882DA CH 175882 A CH175882 A CH 175882A
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 CH175882A publication Critical patent/CH175882A/en

Links

Description

  

  Verfahren zur     Darstellung    eines Substantiven kupferhaltigen     Azofarbstoffes.       Es wurde gefunden. dass man Substantive       kupferhaltige        Azofarbstoffe    erhält, wenn  man     Trisazofarbs.toffe    der allgemeinen Formel  
EMI0001.0006     
    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     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  
EMI0001.0020     
    mit einem kupferabgebenden Mittel unter sol  chen     Bedingungen    behandelt, dass die     Me-          thoxygruppen    aufgespalten werden.         Beispiel:     112 Gewichtsteile des Farbstoffes der  Formel    
EMI0002.0001     
    werden in 2500 Gewichtsteilen Wasser gelöst  und auf 85   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 bis 90     gerührt. Man erhält einen Farbstoff, der  Baumwolle in blauen Tönen anfärbt.



  Process for the representation of a noun copper-containing azo dye. It was found. that one obtains nouns copper-containing azo dyes when one uses trisazofarbs
EMI0001.0006
    where R, 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 with copper-donating agents under such conditions that the in R,

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



  The subject of the present patent is a process for the preparation of a substantive copper-containing trisazo dye. It consists in getting the dye of the formula
EMI0001.0020
    treated with a copper-releasing agent under such conditions that the methoxy groups are split up. Example: 112 parts by weight of the dye of the formula
EMI0002.0001
    are dissolved in 2500 parts by weight of water and heated to 85.

   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 to 90 hours for a further 12 hours. A dye is obtained which 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 EMI0002.0009 mit einem kupferabgebenden Mittel unter solchen Bedingungen behandelt, dass die Me- thogygruppen 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 one uses the azo dye of the formula EMI0002.0009 treated with a copper releasing agent under such conditions that the methogy groups are split up. The new dye obtained stains cotton in blue tones.
CH175882D 1932-09-23 1933-08-19 Process for the preparation of a substantive copper-containing azo dye. CH175882A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE175882X 1932-09-23
CH170768T 1933-08-19

Publications (1)

Publication Number Publication Date
CH175882A true CH175882A (en) 1935-03-15

Family

ID=25718982

Family Applications (1)

Application Number Title Priority Date Filing Date
CH175882D CH175882A (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) CH175882A (en)

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