CH259323A - Process for the production of a copper-containing azo dye. - Google Patents
Process for the production of a copper-containing azo dye.Info
- Publication number
- CH259323A CH259323A CH259323DA CH259323A CH 259323 A CH259323 A CH 259323A CH 259323D A CH259323D A CH 259323DA CH 259323 A CH259323 A CH 259323A
- Authority
- CH
- Switzerland
- Prior art keywords
- copper
- azo dye
- containing azo
- parts
- production
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Herstellung eines kupferhaltigen Azofarbstoffes. Das vorliegende Patent betrifft ein Ver fahren zur Herstellung eines neuen kupfer haltigen Azofarbstoffes und ist dadurch ge kennzeichnet, da.ss man 1 11o1 tetrazotiertes Dianisidin mit 1 Mol 2-Ohynaphthalin-3,6- disulfonsäure und 1 Mol 2-Sulfo-4-oxy-a,
ss- naphthophenazin kuppelt und den erhaltenen Farbstoff mit einem kupferabgebenden Mittel behandelt.
hn Beispiel bedeuten Teile Gewichtsteile. Beispiel: 24,4 Teile Dianisidin werden wie üblich tetrazotiert und unter Eiskühlung mit 30,4 Teilen 2-Oxynaphthalin-3,6-disulfonsäure in Gegenwart von Soda vereinigt. Nach erfolg ter Bildung der Zwischenverbindung wird eine alkalische Lösung des Natriumsalzes von 32,6 Teilen 2-Sulfo-4-oxy-a,ss-naphthophena- zin zugefügt.
Zur Beförderung der Kupplung kann man 5 bis<B>10</B> Volumprozent Pyridin- basengemisch zusetzen. Nach beendeter Kupp lung isoliert man den Farbstoff. Er löst sich in Wasser mit rotstiehig blauer und in kon zentrierter Schwefelsäure mit lebhaft blauer Farbe.
Zur Überführung in den Kupferkomplex werden 96.2 Teile Farbstoff in 3000 Teilen NVasser und 20 Teilen Soda gelöst. Bei 80 bis 90 werden unter Rühren allmählich 500 Teile einer Kupferoxydammoniaklösung, ent haltend 50 Teile krist. Kupfersulfat und 85 Teile konzentrierte wässrige Ammoniak- lösung, zugefügt. Es wird 5 Stunden bei 90<B>'</B> <B>M</B> n erührt und dann 18 Stunden unter Rückfluss gekocht.
Der entstandene Kupferkomplex wird isoliert, filtriert und getrocknet. Er färbt Baumwolle und Zellwolle in grünstichig blaugrauen Tönen von sehr guter Licht- und Waschechtheit.
Process for the production of a copper-containing azo dye. The present patent relates to a process for the production of a new copper-containing azo dye and is characterized in that 1 11o1 tetrazotized dianisidine is mixed with 1 mol of 2-ohynaphthalene-3,6-disulfonic acid and 1 mol of 2-sulfo-4-oxy -a,
ss- naphthophenazine couples and treated the dye obtained with a copper donor.
In the example, parts mean parts by weight. Example: 24.4 parts of dianisidine are tetrazotized as usual and combined with 30.4 parts of 2-oxynaphthalene-3,6-disulfonic acid in the presence of soda, while cooling with ice. After the intermediate compound has formed, an alkaline solution of the sodium salt of 32.6 parts of 2-sulfo-4-oxy-a, s-naphthophenazine is added.
To move the coupling, 5 to 10 percent by volume of a pyridine base mixture can be added. After coupling has ended, the dye is isolated. It dissolves in water with a reddish blue color and in concentrated sulfuric acid with a vivid blue color.
To convert into the copper complex, 96.2 parts of the dye are dissolved in 3000 parts of N water and 20 parts of soda. At 80 to 90, 500 parts of a copper oxide ammonia solution containing 50 parts of crystalline gradually become with stirring. Copper sulfate and 85 parts of concentrated aqueous ammonia solution are added. It is stirred at 90 <B> '</B> <B> M </B> n for 5 hours and then refluxed for 18 hours.
The copper complex formed is isolated, filtered and dried. It dyes cotton and rayon in greenish blue-gray shades of very good lightfastness and washfastness.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH259323T | 1946-12-13 | ||
CH253479T | 1952-07-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH259323A true CH259323A (en) | 1949-01-15 |
Family
ID=25729757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH259323D CH259323A (en) | 1946-12-13 | 1946-12-13 | Process for the production of a copper-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH259323A (en) |
-
1946
- 1946-12-13 CH CH259323D patent/CH259323A/en unknown
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