CH147044A - Process for the preparation of a vat dye. - Google Patents
Process for the preparation of a vat dye.Info
- Publication number
- CH147044A CH147044A CH147044DA CH147044A CH 147044 A CH147044 A CH 147044A CH 147044D A CH147044D A CH 147044DA CH 147044 A CH147044 A CH 147044A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- blue
- vat
- vat dye
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Nüpenfar bstoffes. Im Hauptpatent ist ein Verfahren zur Darstellung eines neuen Küpenfarbstoffes be schrieben, wonach man Pyrazolanthron mit 1-Amino-2-halogerianthrachinonen in Cregen- wart von alkalischen Kondensationsmitteln in der Wärme behandelt.
Es wurde nun gefunden, dass man einen ähnlich wertvollen Küpenfarbstoff erhalten kann, wenn man ein in 2-Stellung . durch Halogen substituiertes Pyrazolanthron mit 1-Amino-4-oxyani,hrachinon in Gegenwart eines alkalischen Kondensationsmittels in der Wärme behandelt.
Der erhaltene Farbstoff färbt Baumwolle aus blauer Küpe in blaugrünen Tönen und löst sich in konzentrierter Schwefelsäure mit grünblauer Farbe. <I>Beispiel:</I> Man erhitzt 18 Teile 2-Brompyrazolanthron, 29 Teile 1-Amino-4-oxyanthrachinon, 10,6 Teile Pottasche, 1,2 Teile Kupferpulver und 180 Teile Nitrobenzol so lange unter Rück fluss und Rühren zum Sieden, bis die Farb- stoffbildung nicht mehr zunimmt.
Hierauf lässt man erkalten und trennt den zum grössten Teil bereits ausgeschiedenen Farb stoff in bekannter Weise vom Lösungsmittel und den anorganischen Bestandteilen des Reaktionsgemisches ab. Man kann zum Bei spiel zunächst zum Abtrennen vom Nitro- benzol mit Alkohol verdünnen, absaugen und mit Alkohol und Wasser waschen.
Zur Ab trennung vom überschüssigen 1-Amino-4-oxy- anthrachinon kann man den rohen Farbstoff zum Beispiel mit 1000 Teilen Schwefelsäure von 70% H2S04 Gehalt ausziehen. Um den Farbstoff in reine Form zu bringen, kristalli siert man ihn zweckmässig aus kochendem Trichlorbenzol um.
Method for the representation of a Nüpenfar bstoffes. In the main patent, a process for the preparation of a new vat dye is described, after which pyrazolanthrone is treated with 1-amino-2-halogerianthraquinones in Cregen wart of alkaline condensing agents in the heat.
It has now been found that a similarly valuable vat dye can be obtained if one is in the 2-position. halogen-substituted pyrazolanthrone treated with 1-amino-4-oxyani, hrachinon in the presence of an alkaline condensing agent in the heat.
The dye obtained dyes cotton from a blue vat in blue-green tones and dissolves in concentrated sulfuric acid with a green-blue color. <I> Example: </I> 18 parts of 2-bromopyrazolanthrone, 29 parts of 1-amino-4-oxyanthraquinone, 10.6 parts of potash, 1.2 parts of copper powder and 180 parts of nitrobenzene are heated under reflux and stirring for as long Boil until the formation of color no longer increases.
It is then allowed to cool and the dye, which has for the most part already separated out, is separated from the solvent and the inorganic constituents of the reaction mixture in a known manner. For example, to separate the nitrobenzene, it can first be diluted with alcohol, filtered off with suction and washed with alcohol and water.
To separate from the excess 1-amino-4-oxyanthraquinone, the crude dye can be extracted, for example, with 1000 parts of sulfuric acid with a content of 70% H2S04. In order to bring the dye into pure form, it is expediently crystallized from boiling trichlorobenzene.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE147044X | 1929-01-10 | ||
CH143401T | 1929-06-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH147044A true CH147044A (en) | 1931-05-15 |
Family
ID=25714283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH147044D CH147044A (en) | 1929-01-10 | 1929-11-20 | Process for the preparation of a vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH147044A (en) |
-
1929
- 1929-11-20 CH CH147044D patent/CH147044A/en unknown
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