CH157530A - Process for the preparation of a water-insoluble azo dye. - Google Patents
Process for the preparation of a water-insoluble azo dye.Info
- Publication number
- CH157530A CH157530A CH157530DA CH157530A CH 157530 A CH157530 A CH 157530A CH 157530D A CH157530D A CH 157530DA CH 157530 A CH157530 A CH 157530A
- Authority
- CH
- Switzerland
- Prior art keywords
- water
- preparation
- azo dye
- insoluble azo
- greenish yellow
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines wasserunlöslichen Azofarbstoifes. Gegenstand dieses Zusatzpatentes ist ein Verfahren zur Darstellung eines wasserun löslichen Azofarbstoffes, das dadurch ge kennzeichnet ist, dass man die Diazoverbin- dung von 1-Amino-4-chlor-2-nitrobenzol mit Benzoylessigsäure-2-chloranilid kuppelt. Die Einwirkung der beiden Komponenten auf einander kann auch in Gegenwart eines Sub strates erfolgen.
Der in Substanz hergestellte Farbstoff bildet ein grünstichig gelbes Pulver, die Fär bungen besitzen einen lebhaften, grünstichig gelben Farbton und sind sehr gut lichtecht. <I>Beispiel:</I> 17,3 gr 1-Amino-4-chlor-2-nitrobenzol werden, wie üblich, mit '30 ein' Salzsäure von 20 B6 und 7,2 gr in Wasser gelöstem Na triumnitrit diazotiert. Die klare Diazolösung wird mit Natriumacetat auf Kongoneutrali tät abgestumpft.
In diese Lösung läuft die durch Lösen von 27,4 gr Benzoylessigsäure- 2-chloranilid in 50 cm' doppelt normaler Na tronlauge - und heissem Wasser erhaltene Arylidlösung. Nach längerem Nachrühren ist die Farb- stoffbildung beendet. Man saugt ab, wäscht gut mit Wasser und trocknet.
Man erhält ein grünstichig gelbes Pulver. Die Darstellung des Farbstoffes kann auch in Gegenwart eines Substrates erfolgen. Wird der Farbstoff auf der Faser erzeugt, so erhält man einen sehr lichtechten, lebhaften, grünstichig gelben Farbton.
Process for the preparation of a water-insoluble azo dye. The subject of this additional patent is a process for the preparation of a water-insoluble azo dye, which is characterized in that the diazo compound of 1-amino-4-chloro-2-nitrobenzene is coupled with benzoyl acetic acid-2-chloroanilide. The action of the two components on one another can also take place in the presence of a substrate.
The dyestuff produced in bulk forms a greenish yellow powder, the colors have a lively, greenish yellow hue and are very lightfast. <I> Example: </I> 17.3 g of 1-amino-4-chloro-2-nitrobenzene are, as usual, diazotized with '30 a 'hydrochloric acid of 20 B6 and 7.2 g of sodium nitrite dissolved in water. The clear diazo solution is blunted to Kongoneutrali ity with sodium acetate.
The arylide solution obtained by dissolving 27.4 g of benzoyl acetic acid 2-chloroanilide in 50 cm 'of double normal sodium hydroxide solution and hot water runs into this solution. After prolonged stirring, the formation of the dye has ended. It is suctioned off, washed well with water and dried.
A greenish yellow powder is obtained. The preparation of the dye can also take place in the presence of a substrate. If the dye is produced on the fiber, a very lightfast, lively, greenish yellow shade is obtained.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE157530X | 1930-05-09 | ||
| CH153828T | 1931-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH157530A true CH157530A (en) | 1932-09-30 |
Family
ID=25716290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH157530D CH157530A (en) | 1930-05-09 | 1931-05-07 | Process for the preparation of a water-insoluble azo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH157530A (en) |
-
1931
- 1931-05-07 CH CH157530D patent/CH157530A/en unknown
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