CH175885A - 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
CH175885A
CH175885A CH175885DA CH175885A CH 175885 A CH175885 A CH 175885A CH 175885D A CH175885D A CH 175885DA CH 175885 A CH175885 A CH 175885A
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 CH175885A publication Critical patent/CH175885A/en

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Description

  

  verfahren zur Darstellung eines Substantiven kupferhaltigen     Azofarbstoffes.       Es wurde     gefunden,    dass man Substantive  kupferhaltige     Azofarbstoffe    erhält, wenn  man     Trisazofarbstoffe    der allgemeinen For  mel  
EMI0001.0005     
    worin     R,    beliebig     substituiert    sein kann und       R2    den     Rest    einer Komponente der Benzol-    oder     Naphthalinreihe,    welche     mindestens    eine       Sulfousäuregruppe    enthält, bedeutet,

       unter     solchen Bedingungen mit kupferabgebenden       Mitteln    behandelt,     dass    die     in        R,        in        o-Stellung     zur     Azobrücke        befindliche        Methogylgruppe     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     
EMI0001.0028     
    mit einem kupferabgebenden     Mittel    unter  solchen Bedingungen behandelt, dass die     Me-          thogygruppen    aufgespalten werden.

           Beispiel:     132 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 has been found that nouns copper-containing azo dyes are obtained when using trisazo dyes of the general formula
EMI0001.0005
    in which R 1 can be substituted as desired and R 2 is the remainder of a component of the benzene or naphthalene series which contains at least one sulfous acid group,

       treated with copper-donating agents under such conditions that the methogyl group in R, in 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
EMI0001.0028
    treated with a copper releasing agent under such conditions that the methogy groups are split up.

           Example: 132 parts by weight of the dye of the formula
EMI0002.0001
    are dissolved in 2500 parts by weight of water and heated to 85. A solution of 33 parts by weight of crystallized copper sulfate and 100 parts by weight of 25% strength ammonia in 250 parts by weight of water is then added, while stirring. 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 substa.n- tiven kupferhaltigen Trisazofarbstoffes, da durch gekennzeichnet, dass man den Azofarb- stoff der Formel EMI0002.0015 mit einem kupferabgebenden Mittel unter solchen Bedingungen behandelt, dass die He- thoxygruppen aufgespalten werden. Der er- haltene neue Farbstoff färbt Baumwolle in blauen Tönen an. PATENT CLAIM: Process for the production of a substa.n- tiven copper-containing trisazo dye, characterized in that the azo dye of the formula EMI0002.0015 treated with a copper releasing agent under such conditions that the ethoxy groups are split up. The new dye obtained stains cotton in blue tones.
CH175885D 1932-09-23 1933-08-19 Process for the preparation of a substantive copper-containing azo dye. CH175885A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE175885X 1932-09-23
CH170768T 1933-08-19

Publications (1)

Publication Number Publication Date
CH175885A true CH175885A (en) 1935-03-15

Family

ID=25718985

Family Applications (1)

Application Number Title Priority Date Filing Date
CH175885D CH175885A (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) CH175885A (en)

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