CH149613A - Process for the preparation of a nitrogenous vat dye. - Google Patents
Process for the preparation of a nitrogenous vat dye.Info
- Publication number
- CH149613A CH149613A CH149613DA CH149613A CH 149613 A CH149613 A CH 149613A CH 149613D A CH149613D A CH 149613DA CH 149613 A CH149613 A CH 149613A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- dye
- vat dye
- nitrogenous
- nitrogen
- Prior art date
Links
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- Coloring (AREA)
Description
Verfahren zur Darstellung eines stickstoffhaltigen H.üpenfarbstoffes. Im Hauptpatent ist ein Verfahren zur Darstellung eines stickstoffhaltigen Küpen- farbstoffes angegeben, bei dem in der Bzl- Stellung negativ substituiertes 2 . N-Pyrazol- anthronylbenzanthron mit-einem alkalischen Kondensationsmittel behandelt wird.
Es wurde nun gefunden, dass man eben falls einen neuen, wertvollen, stickstoffhaltigen Küpenfarbstoff mit ähnlichen Eigenschaften erhält, wenn man in der Bzl-Stellung nega tiv substituiertes 2. N-Pyrazolarrthr-onyl-6- chlorbenzanthron (erhalten zum Beispiel durch Kondensation von Pyrazolanthron mit einem in der Bzl-Stellung negativ substituierten 2 Halogen-6-chlorbenzanthron) mit einem alka lischen Kondensationsmittel behandelt. Hier bei wird der in Bzl-Stellung befindliche ne gative Substituent abgespalten.
Der erhaltene Farbstoff löst sich in kon zentrierter Schwefelsäure mit grüner Farbe und färbt Baumwolle aus violetter Küpe in violetten Tönen.
<I>Beispiel:</I> 20 Teile 2 . N-Py -azolarrthronyl-6 . Bzl-di- chlorbenzanthrorr, erhalten zum Beispiel durch Kondensation von Pyrazolanthron mit 2.6- Bzl-Trichlorbenzanthron (hellbraune Blättehen aus Nitrobenzol), werden in eine 1400 C heisse Mischung von 200 Teilen Ätzkali und 200 Teilen Äthylalkohol eingetragen. AIan rührt solange, bis die Farbstoffbildung be endet ist.
Der Farbstoff wird durch Eingiessen der Schmelze in Wasser und Einleiten von Luft in die alkalische Flüssigkeit aufge arbeitet.
Process for the preparation of a nitrogen-containing H.üpen dye. The main patent specifies a process for the preparation of a nitrogen-containing vat dye in which the negatively substituted 2. N-pyrazole anthronylbenzanthrone is treated with an alkaline condensation agent.
It has now been found that a new, valuable, nitrogen-containing vat dye with similar properties is also obtained if the second N-pyrazolarrthr-onyl-6-chlorobenzanthrone (obtained, for example, by condensation of pyrazolanthrone) is negatively substituted in the Bzl position treated with a negatively substituted 2 halo-6-chlorobenzanthrone in the Bzl position) with an alkaline condensation agent. In this case, the negative substituent in the Bzl position is split off.
The dye obtained dissolves in concentrated sulfuric acid with a green color and dyes cotton from a purple vat in purple tones.
<I> Example: </I> 20 parts 2. N-Py -azolarrthronyl-6. Bzl-dichlorobenzanthrone, obtained for example by condensation of pyrazolanthrone with 2.6-Bzl-trichlorobenzanthrone (light brown leaves from nitrobenzene), are introduced into a 1400 C mixture of 200 parts of caustic potash and 200 parts of ethyl alcohol. Alan stirs until the dye formation has ended.
The dye is worked up by pouring the melt into water and passing air into the alkaline liquid.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE149613X | 1928-11-13 | ||
CH144868T | 1929-09-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH149613A true CH149613A (en) | 1931-09-15 |
Family
ID=25714554
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH149613D CH149613A (en) | 1928-11-13 | 1929-09-28 | Process for the preparation of a nitrogenous vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH149613A (en) |
-
1929
- 1929-09-28 CH CH149613D patent/CH149613A/en unknown
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