CH192983A - Process for the production of a new azo dye. - Google Patents
Process for the production of a new azo dye.Info
- Publication number
- CH192983A CH192983A CH192983DA CH192983A CH 192983 A CH192983 A CH 192983A CH 192983D A CH192983D A CH 192983DA CH 192983 A CH192983 A CH 192983A
- Authority
- CH
- Switzerland
- Prior art keywords
- azo dye
- new
- production
- new azo
- parts
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Terfahren zur Herstellung eines neuen Azofarbstoffes. Gemäss der vorliegenden Erfindung erhält man einen neuen Azofarbstoff durch Kup peln von diazotierter p-Dodecylanilin-m-sul- fonsäure mit 2-N-acetyl-N-ss-hydroxyäthyl- amin-8-naphtol-6-sulfonsäure in einem wäs serigen alkalischen 1Vledium.
<I>Beispiel:</I> Eine Lösung von 36,3 Teilen des Na triumsalzes der p-Dodecylanilin-m-sulfon- säure in 400 Teilen warmem Wasser, das 6,9 Teile Natriumnitrit enthält, wird lang sam unter .gutem Umrühren einem Gemisch von 650 Teilen Wasser und 130 Teilen 10%iger Salzsäure von 5 bis<B>10'</B> C zuge setzt. Die Suspension der Diazoverbindung wird dann einer 5 C warmen Lösung von 34,7 Teilen des Natriumsalzes der 2-N-acetyl N-,B-hydroxyäthylamin-8-naphtol--6-sulfon- säure und 31 Teilen wasserfreiem Natrium karbonat in 400 Teilen Wasser zugesetzt.
Die Kupplung vollzieht sich rasch, und wenn sie vollendet ist, wird der neue Farbstoff durch Aussalzen mit 20 % (Volumgewicht) ge wöhnlichem Salz ausgeschieden und filtriert. Die Farbstoffpaste wird dann mit 20%igem Salzwasser gewaschen und getrocknet. Der neue Farbstoff bildet ein dunkelbraunes Pul ver, welches im Wasser gelöst eine rötIieh- braune Lösung und in konzentrierter Schwe felsäure eine bläulich-rote Lösung ergibt.
Er färbt Wolle in braunen Tönen von sehr guter Haltbarkeit beim Walken.
Terfahren for the production of a new azo dye. According to the present invention, a new azo dye is obtained by coupling diazotized p-dodecylaniline-m-sulphonic acid with 2-N-acetyl-N-ss-hydroxyethylamine-8-naphthol-6-sulphonic acid in an aqueous alkaline solution 1Vledium.
<I> Example: </I> A solution of 36.3 parts of the sodium salt of p-dodecylaniline-m-sulfonic acid in 400 parts of warm water containing 6.9 parts of sodium nitrite is slowly stirred with good stirring a mixture of 650 parts of water and 130 parts of 10% hydrochloric acid from 5 to 10 ° C is added. The suspension of the diazo compound is then a 5 C solution of 34.7 parts of the sodium salt of 2-N-acetyl N-, B-hydroxyethylamine-8-naphthol-6-sulfonic acid and 31 parts of anhydrous sodium carbonate in 400 parts Water added.
Coupling is quick and when it is complete the new dye is precipitated by salting out with 20% (volume weight) common salt and filtered. The dye paste is then washed with 20% salt water and dried. The new dye forms a dark brown powder, which when dissolved in water gives a reddish-brown solution and in concentrated sulfuric acid a bluish-red solution.
It dyes wool in brown tones that are very durable when fulled.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB192983X | 1935-08-30 | ||
CH189409T | 1936-08-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH192983A true CH192983A (en) | 1937-09-15 |
Family
ID=25721787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH192983D CH192983A (en) | 1935-08-30 | 1936-08-14 | Process for the production of a new azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH192983A (en) |
-
1936
- 1936-08-14 CH CH192983D patent/CH192983A/en unknown
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