CH175882A - 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
- CH175882A CH175882A CH175882DA CH175882A CH 175882 A CH175882 A CH 175882A CH 175882D A CH175882D A CH 175882DA CH 175882 A CH175882 A CH 175882A
- Authority
- CH
- Switzerland
- Prior art keywords
- copper
- substantive
- preparation
- azo dye
- dye
- Prior art date
Links
Description
Verfahren zur Darstellung eines Substantiven kupferhaltigen Azofarbstoffes. Es wurde gefunden. dass man Substantive kupferhaltige Azofarbstoffe erhält, wenn man Trisazofarbs.toffe der allgemeinen Formel
EMI0001.0006
worin R, 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 R,
in o-Stel- lung zur Azobrücke befindliche Methoxyl- gruppe gespalten wird.
Gegenstand des vorliegenden Patentes ist ein Verfahren zur Herstellung eines Substan tiven kupferhaltigen Trisazofarbstoffes. Es besteht darin, dass man den Farbstoff der Formel
EMI0001.0020
mit einem kupferabgebenden Mittel unter sol chen Bedingungen behandelt, dass die Me- thoxygruppen aufgespalten werden. Beispiel: 112 Gewichtsteile des Farbstoffes der Formel
EMI0002.0001
werden in 2500 Gewichtsteilen Wasser gelöst und auf 85 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 bis 90 gerührt. Man erhält einen Farbstoff, der Baumwolle in blauen Tönen anfärbt.
Process for the representation of a noun copper-containing azo dye. It was found. that one obtains nouns copper-containing azo dyes when one uses trisazofarbs
EMI0001.0006
where R, 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-donating agents under such conditions that the in R,
methoxyl group located in the o-position to the azo bridge is cleaved.
The subject of the present patent is a process for the preparation of a substantive copper-containing trisazo dye. It consists in getting the dye of the formula
EMI0001.0020
treated with a copper-releasing agent under such conditions that the methoxy groups are split up. Example: 112 parts by weight of the dye of the formula
EMI0002.0001
are dissolved in 2500 parts by weight of water and heated to 85.
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 to 90 hours 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 |
---|---|---|---|
DE175882X | 1932-09-23 | ||
CH170768T | 1933-08-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH175882A true CH175882A (en) | 1935-03-15 |
Family
ID=25718982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH175882D CH175882A (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) | CH175882A (en) |
-
1933
- 1933-08-19 CH CH175882D patent/CH175882A/en unknown
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