CH175885A - 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
- CH175885A CH175885A CH175885DA CH175885A CH 175885 A CH175885 A CH 175885A CH 175885D A CH175885D A CH 175885DA CH 175885 A CH175885 A CH 175885A
- Authority
- CH
- Switzerland
- Prior art keywords
- copper
- substantive
- preparation
- azo dye
- dye
- Prior art date
Links
Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
verfahren zur Darstellung eines Substantiven kupferhaltigen Azofarbstoffes. Es wurde gefunden, dass man Substantive kupferhaltige Azofarbstoffe erhält, wenn man Trisazofarbstoffe der allgemeinen For mel
EMI0001.0005
worin R, beliebig substituiert sein kann und R2 den Rest einer Komponente der Benzol- oder Naphthalinreihe, welche mindestens eine Sulfousäuregruppe enthält, bedeutet,
unter solchen Bedingungen mit kupferabgebenden Mitteln behandelt, dass die in R, in o-Stellung zur Azobrücke befindliche Methogylgruppe 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
EMI0001.0028
mit einem kupferabgebenden Mittel unter solchen Bedingungen behandelt, dass die Me- thogygruppen aufgespalten werden.
Beispiel: 132 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 has been found that nouns copper-containing azo dyes are obtained when using trisazo dyes of the general formula
EMI0001.0005
in which R 1 can be substituted as desired and R 2 is the remainder of a component of the benzene or naphthalene series which contains at least one sulfous acid group,
treated with copper-donating agents under such conditions that the methogyl group in R, in 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
EMI0001.0028
treated with a copper releasing agent under such conditions that the methogy groups are split up.
Example: 132 parts by weight of the dye of the formula
EMI0002.0001
are dissolved in 2500 parts by weight of water and heated to 85. A solution of 33 parts by weight of crystallized copper sulfate and 100 parts by weight of 25% strength 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 tones.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE175885X | 1932-09-23 | ||
CH170768T | 1933-08-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH175885A true CH175885A (en) | 1935-03-15 |
Family
ID=25718985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH175885D CH175885A (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) | CH175885A (en) |
-
1933
- 1933-08-19 CH CH175885D patent/CH175885A/en unknown
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