CH248700A - Process for the preparation of a copper-containing disazo dye. - Google Patents

Process for the preparation of a copper-containing disazo dye.

Info

Publication number
CH248700A
CH248700A CH248700DA CH248700A CH 248700 A CH248700 A CH 248700A CH 248700D A CH248700D A CH 248700DA CH 248700 A CH248700 A CH 248700A
Authority
CH
Switzerland
Prior art keywords
copper
disazo dye
preparation
dye
sulfonic acid
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH248700A publication Critical patent/CH248700A/en

Links

Description

  

      Verfahren    zur Herstellung eines kupferhaltigen     Disazofarbatoffes.            Gegenstand    des vorliegenden Zusatz  patentes ist ein Verfahren zur Herstellung  eines kupferhaltigen     Disazofarbstoffes,    da  durch gekennzeichnet, dass der     Disazofarb-          stoff    [2,8-Dioxynaphthalin-6-sulfonsäure]       (1-azo-4)-,[3,3'-dimethoxy-diphenyll-(4'-a.zo-          1)-[2,8-dioxynaphthalin-6-sulfonsäurel    mit  kupferabgebenden Mitteln behandelt wird.  



  Der neue, kupferhaltige Farbstoff färbt  Baumwolle in     grünstichig    blauen Tönen.    <I>Beispiel:</I>  Man stellt in an sich bekannter Weise  den     Disazofarbstoff    aus 61 Teilen     4,4'-Di-          amino-3,3'-dimethoxy-diphenyl    und 126 Tei  len     2,8-Dioxynaphthalin-6-sulfonsäure    dar.  



  Das in üblicher Weise     abgeschiedene          Natriumsalz    des     Disa.zofarbstoffes    wird in  der     15-20fachen    Menge heissem Wasser ge  löst, die     violettblaue    Lösung mit 50     Vol.-Tei-          len    23%iger     Ammoniaklösung    versetzt und  auf 85-90      erwärmt.    Hierauf wird mit einer  Lösung von 132 Teilen     krist.    Kupfersulfat  in überschüssigem Ammoniak allmählich  versetzt. Es findet dabei Farbenumschlag  von     Violettblau    nach     grünstichig    Blau statt.

      Man rührt weiter während mehreren Stunden  bei der angegebenen Temperatur, lässt hier  auf erkalten und scheidet die neue Kupfer  komplexverbindung durch     Aussalzen    aus;  diese wird dann     filtriert,    mit 10%iger Koch  salzlösung     gewaschen    und getrocknet.  



  Der neue Farbstoff stellt ein violett  schwarzes Pulver dar; er löst sich in heissem  Wasser     mit    graublauer, in     konz.    Schwefel  säure dagegen mit     grünblauer    Farbe. Baum  wolle färbt     diese        Kupferverbindung    in     was-          sertropfechten,        hervorragend        lichtechten,          grünstichig    blauen Tönen. Die Lichtechtheit  der     Färbungen    leidet durch die     sogenannte          Knitterechtbehandlung    nicht.



      Process for the production of a copper-containing disazo carbate. The subject of the present additional patent is a process for the production of a copper-containing disazo dye, characterized in that the disazo dye [2,8-dioxynaphthalene-6-sulfonic acid] (1-azo-4) -, [3,3'-dimethoxy -diphenyll- (4'-a.zo- 1) - [2,8-dioxynaphthalene-6-sulfonic acid is treated with copper-releasing agents.



  The new, copper-containing dye dyes cotton in greenish blue tones. <I> Example: </I> The disazo dye is prepared in a manner known per se from 61 parts of 4,4'-di-amino-3,3'-dimethoxy-diphenyl and 126 parts of 2,8-dioxynaphthalene-6- sulfonic acid.



  The sodium salt of the disazo dye, which is deposited in the usual way, is dissolved in 15-20 times the amount of hot water, 50 parts by volume of 23% ammonia solution are added to the violet-blue solution and heated to 85-90. Then with a solution of 132 parts of crystalline. Copper sulfate is gradually added to excess ammonia. The color changes from violet blue to greenish blue.

      The mixture is stirred for several hours at the specified temperature, allowed to cool here and the new copper complex compound is separated out by salting out; this is then filtered, washed with 10% sodium chloride solution and dried.



  The new dye is a purple black powder; it dissolves in hot water with gray-blue, in conc. Sulfuric acid, on the other hand, has a green-blue color. Cotton colors this copper compound in water-drop-proof, extremely lightfast, greenish blue tones. The lightfastness of the dyeings does not suffer due to the so-called crease-proof treatment.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines kupfer haltigen Disazofarbstoffes, dadurch gekenn- zeichnet, dass der Disazofarbstoff [2,8-Di- oxynaphthaliri - 6 - sulfonsäure] -,(1 - azo - 4)- [3,3'-@dimethoxy-diphenyll - (4'-azo-1) - [2, PATENT CLAIM: Process for the production of a copper-containing disazo dye, characterized in that the disazo dye [2,8-dioxynaphthaliri - 6 - sulfonic acid] -, (1 - azo - 4) - [3,3 '- @ dimethoxy- diphenyl - (4'-azo-1) - [2, 8- dioxynaphthalin-6-sulfonsäure] mit kupfer abgebenden Mitteln behandelt wird. Der neue, kupferhaltige Farbstoff färbt Baumwolle in grünstichig blauen Tönen. 8-dioxynaphthalene-6-sulfonic acid] is treated with copper-releasing agents. The new, copper-containing dye dyes cotton in greenish blue tones.
CH248700D 1945-03-22 1945-03-22 Process for the preparation of a copper-containing disazo dye. CH248700A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH244051T 1945-03-22
CH248700T 1945-03-22

Publications (1)

Publication Number Publication Date
CH248700A true CH248700A (en) 1947-05-15

Family

ID=25728897

Family Applications (1)

Application Number Title Priority Date Filing Date
CH248700D CH248700A (en) 1945-03-22 1945-03-22 Process for the preparation of a copper-containing disazo dye.

Country Status (1)

Country Link
CH (1) CH248700A (en)

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