CH247716A - Process for the preparation of a new monoazo dye. - Google Patents
Process for the preparation of a new monoazo dye.Info
- Publication number
- CH247716A CH247716A CH247716DA CH247716A CH 247716 A CH247716 A CH 247716A CH 247716D A CH247716D A CH 247716DA CH 247716 A CH247716 A CH 247716A
- Authority
- CH
- Switzerland
- Prior art keywords
- light
- preparation
- new
- monoazo dye
- dye
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B45/00—Complex metal compounds of azo dyes
- C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
- C09B45/14—Monoazo compounds
- C09B45/16—Monoazo compounds containing chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines neuen Monoazofarbstoffes. Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Herstellung eines neuen Monoazofarbstoffes, welches darin besteht, dass diazotierte 4-Chlor-2-aminophenol-6-sul- fonsäure mit 1-Phenyl-5-pyrazolon-3-carboxy- o-toluidid gekuppelt wird.
Der neue Farbstoff ist ein dunkelblaues Pulver, welches sich in Wasser unter Bildung einer orangebraunen Lösung und in konz. Schwefelsäure unter Bildung einer rötlich- orangenen Lösung löst. Er färbt Wolle nach dem Chromatverfahren in hellen Bordeaux tönen von hervorragender Echtheitseigen schaft gegen Nassbehandlung und Licht.
Beispiel: 5,86 Teile 1-Phenyl-5-pyrazolon-3-earb- oxy-o-toluidid werden in einer warmen Lö sung, bestehend aus 1 Teil Natriumhydroxyd in 100 Teilen Wasser, gelöst.
Die erhaltene Lösung wird auf 10 C gekühlt und mit 8 Teilen Natriumcarbonatversetzt. Nachdem dieses letztere sieh gelöst hat, lässt man inner halb 10 Minuten eine Diazolösung, welche dadurch erhalten wurde, dass 4,47 Teile 4- Chlor-2-aminophenol-6-sulfonsäure mit 60 Teilen Wasser und 5 Teilen 35%iger Salz säure verrührt und hierauf mit 1,4 Teilen Natriumnitrit, gelöst in 10 Teilen Wasser, versetzt werden, in die Pyrazolonlösung ein fliessen.
Das Gemisch wird über Nacht ge rührt und der Farbstoff durch Filtrieren isoliert und bei 50 C getrocknet. Derselbe färbt Wolle nach dem Chromatverfahren in hellen Bordeauxtönen unter guter Erschöp fung des Färbebades. Die erzeugten Färbun gen zeichnen sich durch eine hervorragende Echtheit gegen Nassbehandlungen und Licht aus.
Process for the preparation of a new monoazo dye. The present invention relates to a process for the preparation of a new monoazo dye which consists in coupling diazotized 4-chloro-2-aminophenol-6-sulphonic acid with 1-phenyl-5-pyrazolone-3-carboxy-o-toluidide .
The new dye is a dark blue powder that dissolves in water to form an orange-brown solution and in conc. Sulfuric acid dissolves to form a reddish-orange solution. It dyes wool using the chromate process in light Bordeaux tones with excellent fastness properties against wet treatment and light.
Example: 5.86 parts of 1-phenyl-5-pyrazolone-3-earb- oxy-o-toluidide are dissolved in a warm solution consisting of 1 part of sodium hydroxide in 100 parts of water.
The resulting solution is cooled to 10 ° C. and 8 parts of sodium carbonate are added. After the latter has dissolved, a diazo solution is left within 10 minutes, which was obtained by stirring 4.47 parts of 4-chloro-2-aminophenol-6-sulfonic acid with 60 parts of water and 5 parts of 35% strength hydrochloric acid and then 1.4 parts of sodium nitrite dissolved in 10 parts of water are added and flow into the pyrazolone solution.
The mixture is stirred overnight and the dye is isolated by filtration and dried at 50.degree. The same dyes wool by the chromate process in light Bordeaux tones with good exhaustion of the dyebath. The dyeings produced are characterized by excellent fastness to wet treatments and light.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB247716X | 1945-01-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH247716A true CH247716A (en) | 1947-03-31 |
Family
ID=10217005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH247716D CH247716A (en) | 1945-01-05 | 1946-01-05 | Process for the preparation of a new monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH247716A (en) |
-
1946
- 1946-01-05 CH CH247716D patent/CH247716A/en unknown
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