CH99674A - Process for the preparation of a black azo dye. - Google Patents
Process for the preparation of a black azo dye.Info
- Publication number
- CH99674A CH99674A CH99674DA CH99674A CH 99674 A CH99674 A CH 99674A CH 99674D A CH99674D A CH 99674DA CH 99674 A CH99674 A CH 99674A
- Authority
- CH
- Switzerland
- Prior art keywords
- sep
- black
- preparation
- water
- azo dye
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines schwarzen Azofarbstoffes. Es wurde gefunden, (lass man einen schwarzen Azularbstoff erhält, wenn man die Diazoverbindung des p-Aminoazokörpers aus diazotiertem p-Chloranilin <B>+</B> 1-Amino-2- naplitoläthyläther mit 2 -3-Oxynapht-oesä-Lire- anil.id kombiniert.
Getrocknet bildet der Farbstoff ein blau schwarzes, metallglänzendes Pulver, das in Wasser unlöslich, in konzentrierter Schwefel säure korinthfarbig löslich ist und aus dieser Lösung durch Wasser in schwarzen Flocken gefällt wird. Er kann auch auf-der Faser erzeugt werden und liefert dann violett- schwarze Färbungen von hervorragenden Eehtheifseigenschaften. <I>Beispiel:
</I> <B>32,5</B> Teile des p-Aminoa.zokörpers aus diazotiertem p-Chloranilin <B>+</B> 1-Amino-2- naplit-olä,thyläther werden in 40 Teilen Salz säure 20' N und etwa 4500 Teilen Wasser gelöst und mit<B>6,9</B> Teilen Natriumnitrit in der üblichen Weise diazotiert. Die so gel#-)i1- Jete Diazoverbindung wird durch Filfrieren -von geringen Verunreinigungen befreit-.<B>26,
3</B> Teile 2 -3-Oxynaphioes'äureanilid werden in 20 Teilen Natronlauge<B>36'</B> B6 und 200 Tei len Wasser unter Zusatz einer wässerigen Lösung von<B>13</B> Teilen Natriumacetat und 2 Teilen Türkischrotöl in der Wärme gelöst, mit Eis auf zirka,<B>10 '</B> abgekühlt und filtriert. Diese Lösung lässt man unter Rühren bei<B>10</B> bis<B>15'</B> in die Diazolbsung einlaufen.
Nach Beendigung der Kupplung wird der entstan dene Farbstoff abfiltriert. Er bildet ein me tallisch glänzendes blauschwarzes Pulver, da-s sich in konzentrierter Schwefelsäure ko- rintlifarbig löst und durch Wasser in schwar zen Flocken ausgefällt wird.
Process for the preparation of a black azo dye. It has been found that (a black azular material is obtained if the diazo compound of the p-aminoazo body is obtained from diazotized p-chloroaniline + 1-amino-2-naplitolethyl ether with 2 -3-oxynaphth-oesa-lire - anil.id combined.
When dried, the dye forms a blue-black, shiny metal powder that is insoluble in water, soluble in concentrated sulfuric acid in a corinthian color and is precipitated from this solution by water in black flakes. It can also be produced on-the-fiber and then provides violet-black colorations with excellent marriage properties. <I> example:
</I> <B> 32.5 </B> parts of the p-Aminoa.zokörpers from diazotized p-chloroaniline <B> + </B> 1-Amino-2-naplit-olä, ethyl ether become salt in 40 parts acid 20'N and about 4500 parts of water and diazotized with <B> 6.9 </B> parts of sodium nitrite in the usual way. The so gel # -) i1- jet diazo compound is freed from minor impurities by filter freezing. <B> 26,
3 parts of 2 -3-Oxynaphioes'äureanilid are in 20 parts of sodium hydroxide solution <B> 36 '</B> B6 and 200 parts of water with the addition of an aqueous solution of <B> 13 </B> parts of sodium acetate and Dissolve 2 parts of Turkish red oil in the heat, cool it with ice to about, <B> 10 '</B> and filter. This solution is allowed to run into the diazole solution at <B> 10 </B> to <B> 15 '</B> while stirring.
After the coupling has ended, the resulting dye is filtered off. It forms a metallic, shiny, blue-black powder that dissolves in concentrated sulfuric acid to give it a corintle color and is precipitated in black flakes by water.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE99674X | 1921-06-13 | ||
CH99283T | 1922-06-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH99674A true CH99674A (en) | 1923-06-16 |
Family
ID=25705528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH99674D CH99674A (en) | 1921-06-13 | 1922-06-12 | Process for the preparation of a black azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH99674A (en) |
-
1922
- 1922-06-12 CH CH99674D patent/CH99674A/en unknown
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