CH147045A - Process for the preparation of a vat dye. - Google Patents
Process for the preparation of a vat dye.Info
- Publication number
- CH147045A CH147045A CH147045DA CH147045A CH 147045 A CH147045 A CH 147045A CH 147045D A CH147045D A CH 147045DA CH 147045 A CH147045 A CH 147045A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- dye
- vat
- blue
- vat dye
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Küpenfarbstoffes. Im Hauptpatent ist ein Verfahren zur Darstellung eines neuen Küpenfarbstoffes be schrieben, wonach man Pyrazolanthron mit 1-Amino-2-halogenanthrachinorien in Gegen wart von alkalischen Kondensationsmitteln in der Wärme behandelt.
Es wurde nun gefunden, dass man einen ähnlich wertvollen Küpenfarbstoff erhalten kann, wenn man ein 2-Stellung durch Ha logen substituiertes Pyrazolanthron mit 1.4- Diaminoanthrachinon in Gegenwart eines al kalischen Kondensationsmittels in der Wärme behandelt.
Der erhaltene Farbstoff färbt Baumwolle aus blauer Küpe in blauen Tönen, die an der Luft in ein grünstichiges ("Trau übergehen und löst sich in konzentierter Schwefelsäure mit blauer Farbe.
<I>Beispiel:</I> Man erhitzt 18 Teile 2-Brompyrazol- anthron, 29 Teile 1.4-Diamiiioanthrachinon, 10,3 Teile Pottasche, 1,2 Teile Kupferpulver und 180 Teile Nitrobenzol so lange zum Sieden, bis die Farbstoffbildung beendet ist. Hierauf lässt man erkalten und trennt den zum grössten Teil bereits ausgeschiedenen Farbstoff in bekannter Weise vom Lösungs mittel ab. Man kann zum Beispiel zunächst zum Abtrennen von Nitrobenzol mit Alkohol verdünnen, absaugen und mit Alkohol und Wasser waschen.
Zur Abtrennung vom über schüssigen 1.4-Diaminoanthrachinon kann man den rohen Farbstoff zum Beispiel mit 1000 Teilen Schwefelsäure von 70 /o H2 SO."- Gehalt ausziehen. Um den Farbstoff in reine Form zu bringen, kristallisiert man ihn zweckmässig aus kochendem Trichlorbenzol um.
Process for the preparation of a vat dye. In the main patent, a process for the preparation of a new vat dye is described, after which pyrazole anthrone is treated with 1-amino-2-halogenanthraquinories in the presence of alkaline condensing agents in the heat.
It has now been found that a similarly valuable vat dye can be obtained if a 2-position halogen-substituted pyrazolanthrone is treated with 1,4-diaminoanthraquinone in the presence of an alkaline condensing agent under heat.
The dye obtained dyes cotton from a blue vat in blue tones, which in the air change to a greenish trau and dissolves in concentrated sulfuric acid with a blue color.
<I> Example: </I> 18 parts of 2-bromopyrazole anthrone, 29 parts of 1,4-diamioanthraquinone, 10.3 parts of potash, 1.2 parts of copper powder and 180 parts of nitrobenzene are heated to the boil until the dye formation has ended . It is then allowed to cool and the dye, which has for the most part already separated out, is separated from the solvent in a known manner. For example, to separate nitrobenzene, one can first dilute with alcohol, suction off and wash with alcohol and water.
To separate the excess 1,4-diaminoanthraquinone, the crude dye can be extracted, for example, with 1000 parts of sulfuric acid with a content of 70 / o H2 SO. "
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE147045X | 1929-01-10 | ||
CH143401T | 1929-06-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH147045A true CH147045A (en) | 1931-05-15 |
Family
ID=25714284
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH147045D CH147045A (en) | 1929-01-10 | 1929-11-20 | Process for the preparation of a vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH147045A (en) |
-
1929
- 1929-11-20 CH CH147045D patent/CH147045A/en unknown
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