CH255318A - Process for the production of a new azo dye. - Google Patents
Process for the production of a new azo dye.Info
- Publication number
- CH255318A CH255318A CH255318DA CH255318A CH 255318 A CH255318 A CH 255318A CH 255318D A CH255318D A CH 255318DA CH 255318 A CH255318 A CH 255318A
- Authority
- CH
- Switzerland
- Prior art keywords
- production
- azo dye
- new azo
- new
- sulfuric acid
- 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
- C09B29/00—Monoazo dyes prepared by diazotising and coupling
- C09B29/06—Monoazo dyes prepared by diazotising and coupling from coupling components containing amino as the only directing group
- C09B29/08—Amino benzenes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines neuen Azofarbstoffes. Die vorliegende Erfindung bezieht sich auf ein Verfahren zur Herstellung eines neuen Azofarbstoffes, gemäss welchem diazo- tiertes 2-Cyan-4-nitranilin mit dem Schwe- felsäureester des N-ss-Oxyäthyl-N-ss'-p-chlor- phenoxyäthylanilins gekuppelt wird.
Der neue Farbstoff bildet ein mattes pur purfarbenes Pulver, welches in heissem Was ser eine bläulichrote Lösung und in Schwe felsäure eine stumpfe orangerote Lösung er gibt. Er färbt Zelluloseacetatkunstseide in rötlichvioletten Farbtönen.
<I>Beispiel:</I> 16,3 Teile 2-Cyan-4-nitranilin werden ge mäss der in Beispiel 1 des brit. Patentes Nr.447561 beschriebenen Methode diazotiert und die so erhaltene Lösung der Diazoverbin- dung auf Eis gegossen und das Produkt all rnählich unter Rühren einer gekühlten Lö sung von 39,4 Teilen des Na.triumsalzes des N" ss-Oxyäthyl-N-ss' p-chlorphenoxyäthylani- linseh,#vefeIsäureesters in 400 Teilen Wasser hinzugesetzt.
Nach beendeter Kupplung wird das Gemisch langsam mit 40%igem wässri- gem Natriumhydroxyd so lange versetzt, und zwar unter Aufrechterhaltung einer Tem peratur von weniger als 10 C durch Aussen kühlung, bis das Gemisch eben lackmusalka- lisch reagiert. Hierauf wird das; Gemisch während einer weiteren Stunde gerührt und der Farbstoff alsdann abfiltriert, mit wenig Wasser gewaschen und bei 30 bis 40 C ge trocknet.
Process for the production of a new azo dye. The present invention relates to a process for the preparation of a new azo dye, according to which diazotized 2-cyano-4-nitroaniline is coupled with the sulfuric acid ester of N-ßs-oxyethyl-N-ßs'-p-chlorophenoxyethylaniline .
The new dye forms a matt, pure, purple powder, which gives a bluish-red solution in hot water and a dull orange-red solution in sulfuric acid. It dyes cellulose acetate artificial silk in reddish purple hues.
<I> Example: </I> 16.3 parts of 2-cyano-4-nitroaniline are diazotized according to the method described in Example 1 of British Patent No. 447561 and the solution of the diazo compound thus obtained is poured onto ice and the product was added gradually with stirring to a cooled solution of 39.4 parts of the sodium salt of N "ß-oxyethyl-N-ß-p-chlorophenoxyethylaniline acid ester in 400 parts of water.
After the coupling is complete, 40% aqueous sodium hydroxide is slowly added to the mixture, while maintaining a temperature of less than 10 C by means of external cooling, until the mixture reacts in a litmus alkaline manner. Then it becomes; The mixture was stirred for a further hour and the dye was then filtered off, washed with a little water and dried at 30 to 40.degree.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB255318X | 1944-08-28 | ||
CH249376T | 1945-08-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH255318A true CH255318A (en) | 1948-06-15 |
Family
ID=25729352
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH255318D CH255318A (en) | 1944-08-28 | 1945-08-28 | Process for the production of a new azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH255318A (en) |
-
1945
- 1945-08-28 CH CH255318D patent/CH255318A/en unknown
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