CH221166A - Process for the preparation of an azo dye. - Google Patents
Process for the preparation of an azo dye.Info
- Publication number
- CH221166A CH221166A CH221166DA CH221166A CH 221166 A CH221166 A CH 221166A CH 221166D A CH221166D A CH 221166DA CH 221166 A CH221166 A CH 221166A
- Authority
- CH
- Switzerland
- Prior art keywords
- azo dye
- preparation
- dye
- red
- aminobenzene
- 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 Azofarbstoffes. Gegenstand des Hauptpatentes ist ein Verfahren zur Herstellung eines Azofarb- stoffes, gemäss welchem man 4-Nitro-2-chlor- 1-aminobenzol diazotiert und mit dem sauren Schwefelsäureester des 3-(N-Athyl-phenyl- amino-)butanols-(1) kuppelt.
Es wurde nun gefunden, dass man eben falls einen sehr wertvollen Azofarbstoff er hält, wenn man 4-Nitro-2-chlor-l-aminobenzol diazotiert und mit dem sauren Schwefelsäure ester des 3-(N-Methyl-phenylamino-)butanols- (1) kuppelt.
<I>Beispiel:</I> Eine aus 17,3 Teilen 4-Nitro-2-ohlor-l- aminobenzol auf dem üblichen Wege darge stellte Diazolösung lässt man unter Rühren in eine eisgekühlte Lösung von 25,9 Teilen des Schwefelsäureesters des 3-(N-Methyl- phenylamino-)b-utanols-(1)
(erhalten durch Kondensation von 3-Chlorbutanol mit Mono- methylanilin und Überführung der so erhal tenen Base durch nachfolgende Einwirkung von Chlorsulfonsäure in den Sulfatoester) einlaufen und fügt zur Beendigung der Kupplung noch eine mehr als ausreichende Menge Na-Acetat hinzu. Nach Beendigung der Kupplung wird auf 70 bis<B>80'</B> erwärmt, wobei der Farbstoff in Lösung geht, und mit.
Kochsalz ausgesalzen. Der erhaltene Farb stoff ist in trockenem Zustand ein rotes Pul ver, das sich in Wasser mit rubinroter Farbe löst. Er besitzt eine hervorragende Affinität für Acetatseide und färbt diese in blauroten Tönungen an. Der Farbstoff ist ausserdem zum Anfärben von tierischen Stoffen, wie Wolle, Leder, Naturseide und dergleichen, brauchbar.
Process for the preparation of an azo dye. The subject of the main patent is a process for the production of an azo dye, according to which 4-nitro-2-chloro-1-aminobenzene is diazotized and treated with the acid sulfuric acid ester of 3- (N-ethyl-phenyl-amino) butanol- (1 ) couples.
It has now been found that a very valuable azo dye is obtained if 4-nitro-2-chloro-l-aminobenzene is diazotized and treated with the acid sulfuric acid ester of 3- (N-methyl-phenylamino) butanol- ( 1) couples.
<I> Example: </I> A diazo solution prepared from 17.3 parts of 4-nitro-2-chloro-l-aminobenzene in the usual way is poured into an ice-cooled solution of 25.9 parts of the sulfuric acid ester of the 3 - (N-methyl-phenylamino-) b-utanols- (1)
(obtained by condensation of 3-chlorobutanol with monomethylaniline and conversion of the base obtained in this way into the sulfatoester by subsequent action of chlorosulfonic acid) and adds a more than sufficient amount of sodium acetate to terminate the coupling. After the coupling has ended, the mixture is heated to 70 to 80 ', the dye going into solution, and with.
Salted out table salt. The dye obtained is a red powder when dry, which dissolves in water with a ruby red color. It has an excellent affinity for acetate silk and dyes it in blue-red tones. The dye can also be used for dyeing animal materials such as wool, leather, natural silk and the like.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE221166X | 1939-05-03 | ||
CH216418T | 1940-04-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH221166A true CH221166A (en) | 1942-05-15 |
Family
ID=25725852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH221166D CH221166A (en) | 1939-05-03 | 1940-04-09 | Process for the preparation of an azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH221166A (en) |
-
1940
- 1940-04-09 CH CH221166D patent/CH221166A/en unknown
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