CH170768A - Process for the preparation of a substantive copper-containing azo dye. - Google Patents
Process for the preparation of a substantive copper-containing azo dye.Info
- Publication number
- CH170768A CH170768A CH170768DA CH170768A CH 170768 A CH170768 A CH 170768A CH 170768D A CH170768D A CH 170768DA CH 170768 A CH170768 A CH 170768A
- Authority
- CH
- Switzerland
- Prior art keywords
- copper
- substantive
- preparation
- azo dye
- containing azo
- Prior art date
Links
Description
Verfahren zur Darstellung eines substantiven kupferhaltigen Azofarbstoffes. Es wurde gefunden, dass man substantive kupferhaltige Azofarbstoffe erhält, wenn man Trisazofarbstoffe der allgemeinen Formel
EMI0001.0006
worin Ri beliebig substituiert sein kann und R2 den Rest einer Komponente der Benzol- oder Naphthalinreihe, welche mindestens eine Sulfonsäuregruppe enthält, bedeutet, unter solchen Bedingungen mit kupferabgebenden Mitteln behandelt,
dass die in Ri in o-Stellung zur Azobrücke befindliche Methoxylgruppe gespalten wird.
Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines kupfer haltigen Trisazofarbstoffes. Es besteht darin, dass man den Azofarbstoff der Formel
EMI0001.0019
mit einem kupferabgebenden Mittel unter solchen Bedingungen behandelt, dass die Methoxygruppen aufgespalten werden.
Beispiel, <I>;</I> 100 Gewichtsteile des Farbstoffes der Formel
EMI0001.0022
werden in 2500 Gewichtsteilen Wasser gelöst und auf<B>850</B> erwärmt. Dann versetzt man unter Rühren mit einer Lösung von 33 Ge wichtsteilen kristallisiertem Kupfersulfat und 100 Gewichtsteilen 25 %igem Ammoniak in 250 Gewichtsteilen Wasser. Die Mischung wird dann noch 12 Stunden bei 80-90 0 gerührt. Man erhält einen Farbstoff, der Baumwolle in blauen Tönen anfärbt.
Process for the preparation of a substantive copper-containing azo dye. It has been found that substantive copper-containing azo dyes are obtained if trisazo dyes of the general formula
EMI0001.0006
where Ri can be substituted as desired and R2 is the remainder of a component of the benzene or naphthalene series, which contains at least one sulfonic acid group, treated under such conditions with copper-releasing agents,
that the methoxyl group in Ri in o-position to the azo bridge is cleaved.
The subject of the present patent is a process for the production of a copper-containing trisazo dye. It consists in getting the azo dye of the formula
EMI0001.0019
treated with a copper donor under such conditions that the methoxy groups are split.
Example, <I>; </I> 100 parts by weight of the dye of the formula
EMI0001.0022
are dissolved in 2500 parts by weight of water and heated to <B> 850 </B>. Then, while stirring, a solution of 33 parts by weight of crystallized copper sulfate and 100 parts by weight of 25% ammonia in 250 parts by weight of water is added. The mixture is then stirred at 80-90 ° for a further 12 hours. A dye is obtained which dyes cotton in blue tones.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE170768X | 1932-09-23 | ||
CH170768T | 1933-08-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH170768A true CH170768A (en) | 1934-07-31 |
Family
ID=25718980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH170768D CH170768A (en) | 1932-09-23 | 1933-08-19 | Process for the preparation of a substantive copper-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH170768A (en) |
-
1933
- 1933-08-19 CH CH170768D patent/CH170768A/en unknown
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