CH106931A - Process for the preparation of a monoazo dye. - Google Patents
Process for the preparation of a monoazo dye.Info
- Publication number
- CH106931A CH106931A CH106931DA CH106931A CH 106931 A CH106931 A CH 106931A CH 106931D A CH106931D A CH 106931DA CH 106931 A CH106931 A CH 106931A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- water
- preparation
- monoazo dye
- methyl
- Prior art date
Links
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- Coloring (AREA)
Description
Verfahren zur Darstellung eines Monoazofarbstoffes. In weiterer Ausbildung des Verfahrens des Hauptpatentes wurde gefunden, dass man durch Kuppeln der Diazoverbindung aus m-Amiclobenzaldehyd mit einem Molekül 1-Phenyl-3-methyl-5-pyrazolon und nachfol gender Sulfonierung einen noch die freie Aldehydgruppe enthaltenden Monoazofarb- stoff erhält, welcher als Pigmentfarbstoff sehr geeignet ist, aber auch die tierische Fa ser aus saurem Bade in klaren gelben, alkali-,
wasser-, walk- und lichtechten Tönen anfärbt und zum Wolldruck geeignet ist.
Beispiel: <B>36,3</B> kg m-Amidobenzaldehyd werden in Form des salzsauren Salzes in Wasser gelöst. Nachdem diese Lösung in bekannter 'Weise durch eine Lösung von 20,7 kg Natriumnitrit in 150 Liter Wasser bei 0 bis 5 dianotiert worden ist, wird, wie üblich, mit einer Lösung von 52,2 kg 1-Phenyl-3-methyl-5-pyrazolon in 600 Liter Wasser und<B>36</B> kg Ätznatron gekuppelt. Die Farbstoffbildung tritt sofort ein und ist nach kurzem Nachrühren beendet.
Der Farb stoff wird durch Kochsalz ausgesalzen, fil triert, gewaschen, .getrocknet und mit der zehnfachen Menge 95 %-Schwefelsäure bei 20 bis 25 verrührt, bis er in eine wasserlösliche Sulfosäure umgewandelt ist. Der Farbstoff wird dann, wie üblich, isoliert, mit Kochsalzlösung gewaschen und getrocknet. Er ist praktisch identisch mit dem Farb stoff, erhalten aus dianotiertem m-Amido- benzaldehyd und 1-p-Sulföphenyl-3-methyl- 5-pyrazolon.
Process for the preparation of a monoazo dye. In a further development of the process of the main patent, it was found that by coupling the diazo compound from m-amiclobenzaldehyde with a molecule of 1-phenyl-3-methyl-5-pyrazolone and subsequent sulfonation, a monoazo dye still containing the free aldehyde group is obtained is very suitable as a pigment, but also the animal fiber from acid bath in clear yellow, alkaline,
dyes water-, mill- and lightfast shades and is suitable for wool printing.
Example: <B> 36.3 </B> kg of m-amidobenzaldehyde are dissolved in water in the form of the hydrochloric acid salt. After this solution has been dianotized in a known manner by a solution of 20.7 kg of sodium nitrite in 150 liters of water at 0 to 5, is, as usual, with a solution of 52.2 kg of 1-phenyl-3-methyl-5 -pyrazolon coupled in 600 liters of water and <B> 36 </B> kg of caustic soda. The formation of the dye occurs immediately and is complete after brief stirring.
The dye is salted out with common salt, filtered, washed, dried and mixed with ten times the amount of 95% sulfuric acid at 20 to 25 until it is converted into a water-soluble sulfonic acid. The dye is then isolated as usual, washed with brine and dried. It is practically identical to the dye obtained from dianotized m-amidobenzaldehyde and 1-p-sulfophenyl-3-methyl-5-pyrazolone.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE106931X | 1922-10-12 | ||
| CH105235T | 1923-10-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH106931A true CH106931A (en) | 1924-09-16 |
Family
ID=25706827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH106931D CH106931A (en) | 1922-10-12 | 1923-10-11 | Process for the preparation of a monoazo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH106931A (en) |
-
1923
- 1923-10-11 CH CH106931D patent/CH106931A/en unknown
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