CH106928A - Process for the preparation of a monoazo dye. - Google Patents
Process for the preparation of a monoazo dye.Info
- Publication number
- CH106928A CH106928A CH106928DA CH106928A CH 106928 A CH106928 A CH 106928A CH 106928D A CH106928D A CH 106928DA CH 106928 A CH106928 A CH 106928A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- monoazo dye
- water
- amidobenzaldehyde
- Prior art date
Links
Landscapes
- 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-Amidobenzaldehyd mit einem Molekül 1-(4'-sulfo-2'-tolyl)-5-pyrazolon-3-carbönsäure einen noch die freie Aldehydgruppe ent haltenden Monoazofarbstoff erhält, welcher als Pigmentfarbstoff sehr geeignet ist, aber auch die tierische Faser aus saurem Bade in klaren grüngelben, alkali-, wasser-, wasch-, walk- und lichtechten Tönen anfärbt und auch zum Wolldruck geeignet ist.
<I>Beispiel:</I> 36,3 kg m-Amidobenzaldehycl werden in Form des salzsauren Salzes in Wasser gelöst. Nachdem diese Lösung in bekannter Weise durch eine Lösung von 20,7 kg Natriumnitrit in<B>150</B> Liter Wasser bei 0 bis 5 diazotiert worden ist, wird, wie üblich, mit einer Lösung von 89,4 kg 1-(4'-sulfo-2'-tolyl)-5-pyrazolon-3-carbonsäure in<B>600</B> Liter Wasser und 40 kg calcinierter Soda bei 0 bis 5 gekuppelt. Die Farbstoff bildung tritt sofort ein und ist nach kurzem Nachrühren bei 20 bis 25 beendet.
Der Farbstoff wird durch Kochsalz vollständig ausgesalzen, filtriert, gewaschen und ge trocknet.
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-amidobenzaldehyde with a molecule of 1- (4'-sulfo-2'-tolyl) -5-pyrazolone-3-carbonic acid, the free aldehyde group is still ent holding monoazo dye, which is very suitable as a pigment dye, but also dyes the animal fibers from acid baths in clear green-yellow, alkali, water, wash, mill and lightfast shades and is also suitable for wool printing.
<I> Example: </I> 36.3 kg of m-amidobenzaldehyde are dissolved in water in the form of the hydrochloric acid salt. After this solution has been diazotized in a known manner by a solution of 20.7 kg of sodium nitrite in <B> 150 </B> liters of water at 0 to 5, a solution of 89.4 kg of 1- ( 4'-sulfo-2'-tolyl) -5-pyrazolone-3-carboxylic acid in <B> 600 </B> liters of water and 40 kg of calcined soda at 0 to 5. The dye formation occurs immediately and is complete after brief stirring at 20-25.
The dye is completely salted out with common salt, filtered, washed and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE106928X | 1922-10-12 | ||
CH105235T | 1923-10-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH106928A true CH106928A (en) | 1924-09-16 |
Family
ID=25706824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH106928D CH106928A (en) | 1922-10-12 | 1923-10-11 | Process for the preparation of a monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH106928A (en) |
-
1923
- 1923-10-11 CH CH106928D patent/CH106928A/en unknown
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