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
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)
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) |
-
1945
- 1945-03-22 CH CH248700D patent/CH248700A/en unknown
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