CH194089A - Process for the preparation of a monoazo dye. - Google Patents
Process for the preparation of a monoazo dye.Info
- Publication number
- CH194089A CH194089A CH194089DA CH194089A CH 194089 A CH194089 A CH 194089A CH 194089D A CH194089D A CH 194089DA CH 194089 A CH194089 A CH 194089A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- monoazo dye
- dye
- oxynaphthoquinoline
- diazotized
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Herstellung eines Monoazofarbstoffes. Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines Mono azofarbstoffes. Das Verfahren ist dadurch gekennzeichnet, dass man 2.4-Dinitro-6-brom- anilin :diazotiert und die Diazoverbindung mit Py-Tetrahydro-7-oxynaphthochinolin in sau rer Lösung kuppelt.
Der erhaltene neue Farbstoff färbt auf Acetatseide aus dem Seifenbade ein Grün von guten Eigenschaften.
Beispiel: 2-6,2 Gewichtsteile 2,4-Dinitro-6-bromanilin werden in 100 Gewichtsteilen konzentrierter Schwefelsäure 60 Be mit einer 6,9 Gewichts teilen Natriumnitrit entsprechenden Menge Nitrosylschwefelsäure diazotiert; die erhal tene stark schwefelsaure Diazolösung lässt man einfliessen in eine wässerige Lösung von 23,5 Gewichtsteilen Py-Tetrahydro-7-oxy- naphthochinolinchlorhydrat; die Kupplung ist nach dem Zugeben der Diazolösung be endet.
In üblicher Weise isoliert, färbt der Farbstoff auf Acetatseide aus dem Seifen bade ein Grün von guten Eigenschaften.
Process for the preparation of a monoazo dye. The present patent relates to a process for the preparation of a mono azo dye. The process is characterized in that 2,4-dinitro-6-bromoaniline: is diazotized and the diazo compound is coupled with py-tetrahydro-7-oxynaphthoquinoline in acidic solution.
The new dye obtained dyes a green with good properties on acetate silk from the soap bath.
Example: 2-6.2 parts by weight of 2,4-dinitro-6-bromaniline are diazotized in 100 parts by weight of concentrated sulfuric acid 60 Be with an amount of nitrosylsulfuric acid corresponding to 6.9 parts by weight of sodium nitrite; the obtained strongly sulfuric acid diazo solution is allowed to flow into an aqueous solution of 23.5 parts by weight of py-tetrahydro-7-oxynaphthoquinoline chlorohydrate; the coupling is ended after the addition of the diazo solution.
Isolated in the usual way, the dye on acetate silk from the soaps bathes dyes a green with good properties.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE194089X | 1934-11-23 | ||
CH187427T | 1935-10-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH194089A true CH194089A (en) | 1937-11-15 |
Family
ID=25721528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH194089D CH194089A (en) | 1934-11-23 | 1935-11-19 | Process for the preparation of a monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH194089A (en) |
-
1935
- 1935-11-19 CH CH194089D patent/CH194089A/en unknown
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