CH198148A - Process for the preparation of a leuco ester of a dye of the anthraquinonazole series. - Google Patents
Process for the preparation of a leuco ester of a dye of the anthraquinonazole series.Info
- Publication number
- CH198148A CH198148A CH198148DA CH198148A CH 198148 A CH198148 A CH 198148A CH 198148D A CH198148D A CH 198148DA CH 198148 A CH198148 A CH 198148A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- anthraquinonazole
- series
- preparation
- leuco
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Herstellung eines Leukoesters eines Farbstoffes der Anthrachinonazolreihe. Es wurde gefunden, dass man bei der Behandlung von 1-Amino-2-anthrachinonyl- monochlor-2',3'-anthrachinonoxazol mit einem veresternd wirkenden Abkömmling der Schwe felsäure in Gegenwart von Pyridin und Kupfer unterhalb <B>100'C</B> den neuen I.;euko- schwefelsäureester :dieses Azols erhält.
Der in sehr guter Ausbeute und Reinheit erhältliche Leukoester besitzt vorzügliche färberische Eigenschaften. Er liefert beim Entwickeln in der üblichen Weise auf der Faser echte, blaurote Färbungen oder Drucke. <I>Beispiel:
</I> Zu 150 Teilen möglichst wasserfreiem Pyridin lässt man unter Kühlung 15 Teile eines Gemisches aus 80 Teilen Schwefel- trioxyd und 20 Teilen Chlorsulfonsäure ein tropfen und trägt .dann 13 Teile 1-Amino-2- anthracllinonylmonochlor- 2',3'- antlirachinon- oxazol und 13 Teile Kupferpulver ein.
Man rührt nun das Gemisch zwei Stunden lang bei 35'C, wobei der Farbstoff mit tiefrot brauner Farbe in Lösung geht, fällt das Pyridinsalz des Leukoesters durch Eintragen in Eiswasser aus, trennt die wässrige Lösung ab und löst den Niederschlag in einer Mischung von 1000 Teilen Wasser von 60 C und 28 Teilen f iger Natronlauge.
Die Lösung erwärmt man so lange unter vermin dertem Druck, bis kein Pyridin mehr über geht, filtriert sie und salzt aus der tiefrot braun gefärbten Lösung durch Zugabe von Natrium- oder Kaliumchlorid das Salz des Leukoesters aus. Es bildet einen rotgelben Niederschlag, den man auf die übliche Weise abtrennt und in Pasten- oder Pulverform bringt. Die Ausbeute ist sehr .gut. Man er hält beim Entwickeln in der üblichen Weise auf der Faser echte, blaurote Färbungen oder Drucke.
Process for the preparation of a leuco ester of a dye of the anthraquinonazole series. It has been found that the treatment of 1-amino-2-anthraquinonyl monochloro-2 ', 3'-anthraquinone oxazole with an esterifying derivative of sulfuric acid in the presence of pyridine and copper below <B> 100'C </ B> the new I. eucosulphuric acid ester: this azole contains.
The leuco ester, which is available in very good yield and purity, has excellent coloring properties. When developed in the usual way, it produces true, bluish-red dyeings or prints on the fiber. <I> example:
</I> 15 parts of a mixture of 80 parts of sulfur trioxide and 20 parts of chlorosulfonic acid are added dropwise to 150 parts of pyridine, which is as anhydrous as possible, and 13 parts of 1-amino-2-anthracllinonylmonochloro-2 ', 3'- antlirachinon-oxazole and 13 parts copper powder.
The mixture is then stirred for two hours at 35.degree. C., the dye going into solution with a deep red-brown color, the pyridine salt of the leuco ester precipitates by pouring it into ice water, the aqueous solution is separated off and the precipitate is dissolved in a mixture of 1000 parts 60 ° C water and 28 parts of sodium hydroxide solution.
The solution is heated under reduced pressure until no more pyridine passes over, it is filtered and the salt of the leuco ester is salted out of the deep red-brown solution by adding sodium or potassium chloride. A red-yellow precipitate forms, which is separated off in the usual way and brought into paste or powder form. The yield is very good. Real, bluish-red dyeings or prints are kept on the fiber in the usual way during development.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE198148X | 1936-05-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH198148A true CH198148A (en) | 1938-06-15 |
Family
ID=5756802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH198148D CH198148A (en) | 1936-05-23 | 1937-05-20 | Process for the preparation of a leuco ester of a dye of the anthraquinonazole series. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH198148A (en) |
-
1937
- 1937-05-20 CH CH198148D patent/CH198148A/en unknown
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