CH195234A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH195234A CH195234A CH195234DA CH195234A CH 195234 A CH195234 A CH 195234A CH 195234D A CH195234D A CH 195234DA CH 195234 A CH195234 A CH 195234A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- azo dye
- blue
- pure
- dye
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Azofarbstoffes. Es wurde gefunden, dass man durch Kup peln von @diazotiertem 6-Chlor-2,4-dinitrani- lin mit 3-Äthyl-ss,y@dioxypropylaminoacet- anilid einen schwerlöslichere Azofarbstoff er hält, der sehr wertvolle Eigenschaften besitzt.
Er stellt ein dunkelgrünes, messingglänzen des Pulver dar, das sich in Alkohol leicht mit blauroter Farbe löst und Lacke oder Zel- luloseester in, lichtechten reinen blauvioletten Tönen anfärbt. Die Textilfärbungen sind rein weiss ätzbar.
Beispiel: 2.17,5 Gewichtsteile 6-Chlor-2,4-,dinitrani- lin werden in bekannter Weise mit einer Nitrosylschwefelsäure entsprechend 69 Ge wichtsteile Nitrit d iazotiert und kalt mit der dreifachen Menge Eisessig verdünnt.
Diese Lösung wird in dünnem Strahl unter gutem Rühren. zu einer eiskalten salzsauren Lösung von 250 Gewichtsteilen .3-Äthyl-ss,y-dioxy- propylaminoacetanilid zulaufen gelassen.
Die Farbstoffbildung kann beschleunigt werden durch Abstumpfen der stark mineralsauren Reaktion. Nach Verschwinden der kongo sauren 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 blauroter Farbe löst und Lacke oder Zelluloseester in lichtechten: reinen blauvioletten Tönen an färbt. Die Textilfärbungen sind rein weiss ätzbar.
Process for the preparation of an azo dye. It has been found that coupling of @diazotized 6-chloro-2,4-dinitraniline with 3-ethyl-ss, y @ dioxypropylaminoacetanilide gives a sparingly soluble azo dye which has very valuable properties.
It represents a dark green, brassy shine of the powder, which easily dissolves in alcohol with a blue-red color and stains paints or cellulose esters in lightfast, pure blue-violet tones. The textile dyeings can be etched in pure white.
Example: 2.17.5 parts by weight of 6-chloro-2,4-, dinitranilin are diazotized in a known manner with nitrosylsulfuric acid corresponding to 69 parts by weight of nitrite and diluted cold with three times the amount of glacial acetic acid.
This solution is poured into a thin stream with good stirring. to an ice-cold hydrochloric acid solution of 250 parts by weight .3-ethyl-ss, y-dioxy-propylaminoacetanilide allowed to run.
Color formation can be accelerated by blunting the strongly mineral acidic reaction. After the Congo acidic reaction has disappeared, the dye precipitates 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 blue-red color and colors paints or cellulose esters in lightfast: pure blue-violet tones. The textile dyeings can be etched in pure white.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB195234X | 1935-08-27 | ||
CH192853T | 1936-08-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH195234A true CH195234A (en) | 1938-01-15 |
Family
ID=25722342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH195234D CH195234A (en) | 1935-08-27 | 1936-08-13 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH195234A (en) |
-
1936
- 1936-08-13 CH CH195234D patent/CH195234A/en unknown
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