CH175881A - 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
- CH175881A CH175881A CH175881DA CH175881A CH 175881 A CH175881 A CH 175881A CH 175881D A CH175881D A CH 175881DA CH 175881 A CH175881 A CH 175881A
- Authority
- CH
- Switzerland
- Prior art keywords
- copper
- substantive
- preparation
- azo dye
- containing azo
- Prior art date
Links
Landscapes
- Coloring (AREA)
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 R1 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 R1 in o-Stel- lung zur Azobrücke befindliche Methogyl- gruppe gespalten wird.
Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines substan- tiven kupferhaltigen Triazofarbstoffes. Es besteht darin, dass man den Azofarbstoff der Formel
EMI0001.0027
mit einem kupferabgebenden Mittel unter sol chen Bedingungen behandelt, dass die Me- thogygruppen aufgespalten werden. <I>Beispiel:</I> 100 Gewichtsteile des Farbstoffes der Formel
EMI0002.0001
werden in 2500 Gewichtsteilen Wasser ge löst und auf<B>85'</B> erwärmt.
Dann versetzt man unter Rühren mit einer Lösung von 88 Gewichtsteilen kristallisiertem Kupfersulfat und 100 Gewichtsteilen 25 % igem Ammoniak in 250 Gewichtsteilen Wasser. Die Mischung wird dann noch 12 Stunden bei 80 bis 90 gerührt. Man erhält einen Farbstoff, dei 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 R1 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 with copper-releasing agents under such conditions that the methogyl group in R1 in the o-position to the azo bridge is cleaved.
The subject of the present patent is a process for the production of a substantial copper-containing triazo dye. It consists in getting the azo dye of the formula
EMI0001.0027
treated with a copper releasing agent under such conditions that the methogy groups are split up. <I> Example: </I> 100 parts by weight of the dye of the formula
EMI0002.0001
are dissolved in 2500 parts by weight of water and heated to <B> 85 '</B>.
A solution of 88 parts by weight of crystallized copper sulfate and 100 parts by weight of 25% ammonia in 250 parts by weight of water is then added, while stirring. The mixture is then stirred at 80 to 90 hours for a further 12 hours. A dye is obtained which dyes cotton in blue shades.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE175881X | 1932-09-23 | ||
CH170768T | 1933-08-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH175881A true CH175881A (en) | 1935-03-15 |
Family
ID=25718981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH175881D CH175881A (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) | CH175881A (en) |
-
1933
- 1933-08-19 CH CH175881D patent/CH175881A/en unknown
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