CH195228A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH195228A CH195228A CH195228DA CH195228A CH 195228 A CH195228 A CH 195228A CH 195228D A CH195228D A CH 195228DA CH 195228 A CH195228 A CH 195228A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- azo dye
- pure
- dye
- dinitraniline
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Azofarbstoffes. Es wurde gefunden, dass man durch Kup peln von dianotiertem 6-Chlor-2,4-dinitranilin mit 3-Dioxyäthylaminoacetanilid einen schwer löslichen Azofarbstoff erhält, der sehr wert volle Eigenschaften besitzt. Er stellt ein dunkelgrünes, messingglänzendes Pulver dar, das sich in Alkohol leicht mit rein violetter Farbe löst und Lacke oder Zelluloseester in lichtechten, reinen, blaustichig violetten Tönen anfärbt. Die Textilfärbungen sind rein weiss ätzbar.
<I>Beispiel:</I> 217,5 Gt. 6-Chlor-2,4-dinitranilin werden in bekannter Weise mit einer Nitrosylschwefel- säure entsprechend 69 Gt. Nitrit dianotiert und kalt mit der dreifachen Menge Eisessig verdünnt. Diese Lösung wird in dünnem Strahl unter gutem Rühren zu einer eiskalten salz sauren Lösung von 238 Gt. 3-Dioxyäthyl- aminoacetanilid zulaufen gelassen. Die Farb- stoffbildung kann beschleunigt werden durch Abstumpfen der stark mineralsauren Reak tion.
Nach Verschwinden der kongosauren Reaktion fällt der Farbstoff als schwarzer Niederschlag aus, der in bekannter Weise isoliert und getrocknet wird. Er stellt ein dunkelgrünes, messingglänzendes Pulver dar, das sich in Alkohol leicht mit rein violetter Farbe löst und Lacke oder Zelluloseester in lichtechten, reinen, blaustichig violetten Tö nen anfärbt. Die Textilfärbungen sind rein weiss ätzbar.
Process for the preparation of an azo dye. It has been found that by Kup peln of dianotated 6-chloro-2,4-dinitraniline with 3-dioxyethylaminoacetanilide a sparingly soluble azo dye is obtained, which has very valuable properties. It is a dark green, shiny brass powder that easily dissolves in alcohol with a purely violet color and stains paints or cellulose esters in lightfast, pure, bluish violet tones. The textile dyeings can be etched in pure white.
<I> Example: </I> 217.5 Gt. 6-chloro-2,4-dinitraniline are in a known manner with a nitrosylsulfuric acid corresponding to 69 pbw. Dianotized nitrite and diluted cold with three times the amount of glacial acetic acid. This solution is poured in a thin stream with thorough stirring to an ice-cold salt-acid solution of 238 parts by weight. 3-Dioxyäthyl- aminoacetanilid allowed to run in. The formation of color can be accelerated by blunting the strongly mineral acidic reaction.
After the Congo acidic reaction has disappeared, the dye separates out as a black precipitate, which is isolated and dried in a known manner. It is a dark green, shiny brass powder that easily dissolves in alcohol with a purely violet color and colors paints or cellulose esters in lightfast, pure, bluish violet tones. The textile dyeings can be etched in pure white.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB195228X | 1935-08-27 | ||
CH192853T | 1936-08-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH195228A true CH195228A (en) | 1938-01-15 |
Family
ID=25722336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH195228D CH195228A (en) | 1935-08-27 | 1936-08-13 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH195228A (en) |
-
1936
- 1936-08-13 CH CH195228D patent/CH195228A/en unknown
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