CH99665A - Process for the preparation of a black azo dye. - Google Patents
Process for the preparation of a black azo dye.Info
- Publication number
- CH99665A CH99665A CH99665DA CH99665A CH 99665 A CH99665 A CH 99665A CH 99665D A CH99665D A CH 99665DA CH 99665 A CH99665 A CH 99665A
- Authority
- CH
- Switzerland
- Prior art keywords
- black
- sep
- preparation
- azo dye
- water
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines schwarzen Azofarbstoffes. Es wurde gefunden, dass irlan einen schwar zen Azofarbstoff erhält, wenn man die Diazo- verbindung des p-Aininoazokurpei-.- aus di- azotiertem o-Anisidin <B>+</B> a-Naphtylamin mit 2<B>.</B> 3-Oxynaphtoes.ture-p-naphtalid kombiniert.
Getrocknet bildet der Farbstoff ein violett- schwarzes, metallglänzendes Pulver, das in Wasser unlöslich, in konz. Schwefelsäure mit grünlich blauer Farbe löslich ist und aus die ser Lösung durch Wasser in schwarzen Flok- ken gefällt wird. Er kann aber auch auf der Faser erzeugt werden und liefert dann schwarze Färbungen von hervorragenden Echtheitseigen schaften.
<I>Beispiel:</I> <B>27,7</B> Teile des p-Aminoazokörpers aus di- azotiertem o-Anisidin <B>+</B> a-Naphtylamin wer den in 40 Teilen Salzsäure 20<B>0</B> B6 und etwa 4500 Teilen Wasser gelöst und mit<B>6,9</B> Teilen Natriumnitrit in der üblichen Weise diazotiert. Die so gebildete Diazoverbindung wird durch Filtrieren von geringen Verunreinigungen be freit.<B>31,
3</B> Teile 2<B>.</B> 3-Oxynaphtoesäure-fl-naph- talid werden in 20 Teilen Natronlauge<B>36 '</B> B6 und<B>900</B> Teilen Wasser unter Zusatz einer wässerigen Lösung von<B>18</B> Teilen Natrium- acetat und 2 Teilen Türkischrotbl in der Wärme gelöst, mit Eis auf ca. <B>10 '</B> abgekühlt und filtriert. Diese Lösung lässt man unter Rühren bei<B>10-15 0</B> in die Diazolösung ein laufen.
Nach Beendigung der Kupplung wird der entstandene Farbstoff abfiltriert. Er bildet ein metallisch glänzendes, violettschwarzes Pulver, das sich in konz. Schwefelsäure mit grünlich blauer Farbe löst und durch Wasser in schwarzen Flocken auscefällt wird.
e
Process for the preparation of a black azo dye. It has been found that irlan receives a black azo dye if the diazo compound of the p-aminoazokurpei -.- from diazoated o-anisidine <B> + </B> a-naphthylamine is mixed with 2 <B>. < / B> 3-Oxynaphtoes.ture-p-naphtalid combined.
When dried, the dye forms a violet-black, metallic powder that is insoluble in water, in conc. Sulfuric acid is soluble with a greenish blue color and is precipitated from this solution by water in black flakes. But it can also be produced on the fiber and then delivers black dyeings with excellent fastness properties.
<I> Example: </I> <B> 27.7 </B> parts of the p-aminoazo body from diazoated o-anisidine <B> + </B> a-naphthylamine are used in 40 parts of hydrochloric acid 20 < B> 0 B6 and about 4500 parts of water and diazotized with 6.9 parts of sodium nitrite in the usual way. The diazo compound thus formed is freed from minor impurities by filtration. <B> 31,
3 parts 2. 3-oxynaphthoic acid-fl-naphthalide are used in 20 parts of sodium hydroxide solution <B> 36 '</B> B6 and <B> 900 </B> parts of water with the addition of an aqueous solution of <B> 18 </B> parts of sodium acetate and 2 parts of Turkish red blue dissolved in the heat, cooled with ice to about <B> 10 '</B> and filtered. This solution is allowed to run into the diazo solution at <B> 10-15 0 </B> while stirring.
After the coupling has ended, the resulting dye is filtered off. It forms a metallic, shiny, violet-black powder, which is concentrated in. Sulfuric acid dissolves with a greenish blue color and is precipitated in black flakes by water.
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Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE99665X | 1921-06-13 | ||
CH99283T | 1922-06-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH99665A true CH99665A (en) | 1923-06-16 |
Family
ID=25705519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH99665D CH99665A (en) | 1921-06-13 | 1922-06-12 | Process for the preparation of a black azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH99665A (en) |
-
1922
- 1922-06-12 CH CH99665D patent/CH99665A/en unknown
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