CH124353A - Process for the preparation of a vat dye. - Google Patents
Process for the preparation of a vat dye.Info
- Publication number
- CH124353A CH124353A CH124353DA CH124353A CH 124353 A CH124353 A CH 124353A CH 124353D A CH124353D A CH 124353DA CH 124353 A CH124353 A CH 124353A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- vat dye
- dye
- vat
- product
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Cosmetics (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
Description
Verfahren zur Darstellung eines Nüpenfarbstofes. Es wurde gefunden, dass man einen wert vollen güpenfarbstoff enthält, wenn man den bei etwa 22l-224 schmelzenden Bestand teil des Einwirkungsproduktes von me- thylierend wirkenden Mitteln, wie Toluolsulfo- säuremethylester etc., auf Pyrazolanthron mit einem alkalischen Kondensationsmittel behandelt.
Hierbei kann man auch das rohe Alkylierungsprodukt verwenden, da der Be- gleitkörper unter den gleichen Bedingungen keinen Farbstoff liefert. Es können auch mehrere alkalische Kondensationsmittel zur Anwendunggelangen. Derso erhältliche Küpen- farbstoff ist ein rotes Pulver, das sich in konzentrierter Schwefelsäure mit oranger Farbe löst und aus blauer Küpe Baumwolle blau färbt. An der Luft geht die Färbung durch Oxydation in. ein sehr blaustichiges Rot über.
<I>Beispiel:</I> In eine Schmelze von alkoholischem Kali, erhalten durch Erhitzen von 12,5 Teilen Kalihydrat mit 10 Teilen Äthylalkohol auf 120 , trägt man 2,5 Teile des bei etwa 221-224 schmelzenden Bestandteils des Einwirkungsproduktes von Toluolsulfosäure- rnethylester auf Pyrazolanthron ein,
welches durch mehrstündiges Erhitzen von 1 Teil Pyrazolanthron mit der gleichen Menge Soda und Toluolsulfosäuremethylester in 30 Teilen Trichlorbenzol und darauffolgende Entfernung des Trichlorbenzols durch Wasserdampfdestil- lation erhalten wird. Man rührt<B>1</B>1/2 Stunden bei 1200, giesst dann die Schmelze in viel Wasser, bläst den Farbstoff durch Einleiten von Luft aus, saugt ab, wäscht mit Wasser, trocknet und befreit den Farbstoff durch Auskochen mit Alkohol von Verunreinigungen.
Process for the preparation of a pebble dye. It has been found that a valuable high-quality dye is obtained if the component of the product of the action of methylating agents, such as methyl toluenesulfate, etc., which melts at about 22l-224, is treated on pyrazole anthrone with an alkaline condensation agent.
The crude alkylation product can also be used here, since the accompanying body does not produce any dye under the same conditions. Several alkaline condensing agents can also be used. The vat dye available in this way is a red powder that dissolves in concentrated sulfuric acid with an orange color and turns cotton blue from a blue vat. In the open air the color changes to a very bluish red through oxidation.
<I> Example: </I> In a melt of alcoholic potash, obtained by heating 12.5 parts of potassium hydrate with 10 parts of ethyl alcohol to 120, 2.5 parts of the component of the product of action of toluenesulfonic acid, which melts at about 221-224, are added - methyl ester on pyrazolanthrone,
which is obtained by heating 1 part of pyrazolanthrone with the same amount of soda and methyl toluenesulfate in 30 parts of trichlorobenzene for several hours and then removing the trichlorobenzene by steam distillation. The mixture is stirred for 1 1/2 hours at 1200, then the melt is poured into a large amount of water, the dye is blown out by introducing air, suction filtered, washed with water, dried and the dye is freed by boiling with alcohol of impurities.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE124353X | 1925-12-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH124353A true CH124353A (en) | 1928-01-16 |
Family
ID=5658199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH124353D CH124353A (en) | 1925-12-22 | 1926-12-18 | Process for the preparation of a vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH124353A (en) |
-
1926
- 1926-12-18 CH CH124353D patent/CH124353A/en unknown
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