CH198887A - Process for the preparation of a monoazo dye. - Google Patents
Process for the preparation of a monoazo dye.Info
- Publication number
- CH198887A CH198887A CH198887DA CH198887A CH 198887 A CH198887 A CH 198887A CH 198887D A CH198887D A CH 198887DA CH 198887 A CH198887 A CH 198887A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- monoazo dye
- amino
- dye
- azo
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Herstellung eines Nonoazofarbstoffes. Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines Mono- azofarbstoffes. Das Verfahren ist daduroh gekennzeichnet, dass man diazotiertes 2-Chlor- anilin mit 1-Amino-7-oxynaphthalin in saurer Lösung kuppelt.
Der erhaltene neue Monoazofarbstoff 4-(2'-Chlorbenzol)-azo-l-amino-7-oxynaphtha- lin ist in Wasser unlöslich, löst sich in ver dünnten Alkalien und besitzt eine .gute Affi nität zur Faser.
<I>Beispiel:</I> In eine eiskalte Lösung von 1-Amino-7- oxynaphthalin wird die in bekannter Weise aus 2-Chloranilin hergestellte Diazolösung eingerührt. wobei man dafür Sorge trägt, class die Lösung schwach kongosauer reagiert. Der Farbstoff fällt in guter Ausbeute an. Er löst sich rotbraun in Natronlauge. .Sub- stantivität auf Baumwolle: 25%.
Process for the preparation of a nonoazo dye. The present patent relates to a process for the preparation of a monoazo dye. The process is characterized by coupling diazotized 2-chloro aniline with 1-amino-7-oxynaphthalene in acidic solution.
The new monoazo dye obtained, 4- (2'-chlorobenzene) -azo-1-amino-7-oxynaphthalene, is insoluble in water, dissolves in dilute alkalis and has a good affinity for fibers.
<I> Example: </I> The diazo solution prepared in a known manner from 2-chloroaniline is stirred into an ice-cold solution of 1-amino-7-oxynaphthalene. taking care that the solution reacts weakly acidic to the Congo. The dye is obtained in good yield. It dissolves red-brown in caustic soda. . Substantivity on cotton: 25%.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE198887X | 1935-08-16 | ||
CH194455T | 1936-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH198887A true CH198887A (en) | 1938-07-15 |
Family
ID=25722680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH198887D CH198887A (en) | 1935-08-16 | 1936-07-30 | Process for the preparation of a monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH198887A (en) |
-
1936
- 1936-07-30 CH CH198887D patent/CH198887A/en unknown
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