CH182594A - Process for the preparation of a monoazo dye. - Google Patents
Process for the preparation of a monoazo dye.Info
- Publication number
- CH182594A CH182594A CH182594DA CH182594A CH 182594 A CH182594 A CH 182594A CH 182594D A CH182594D A CH 182594DA CH 182594 A CH182594 A CH 182594A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- sulfonic acid
- monoazo dye
- preparation
- production
- Prior art date
Links
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- Coloring (AREA)
Description
Verfahren zur Herstellung eines bIonoazofarbstoffes. Vorliegendes Patent bezieht sich auf ein Verfahren zur Herstellung eines Monoazo- farbstoffes, dadurch gekennzeichnet, dass man die Diazoverbindung von 4-Amiriodiphenyl- äther-3-sulfosäure mit 2-Acetylmethyl-amino- 8-riaphthol-6-sulfosäure kuppelt.
Der so erhaltene Farbstoff bildet nach dem Trocknen ein rotes wasserlösliches Pulver und färbt die tierische Faser aus saurem Bade in sehr egalen leuchtend roten Tönen von sehr guter Lichtechtheit. <I>Beispiel:</I> 26,4 kg 4-AmiDodiphenylätbei--3-sulfo- säure werden in Wasser unter Zusatz von Soda heiss gelöst und mit einer Lösung von 6,
9 kg Natriumnitrit und der nötigen Menge Salzsäure unter Kühlung diazotiert. Die so erhaltene Diazotierungsflüssigkeit lässt man in eine mit überschüssigem Natriumbicarbonat versetzte Lösung von 31 kg 2-Acetyl-methyl- amino-8-naphthol-6-sulfosäure laufen. Nach beendeter Kupplung wird der so erhaltene Farbstoff isoliert und getrocknet.
Process for the production of a bionoazo dye. The present patent relates to a process for the production of a monoazo dye, characterized in that the diazo compound of 4-amiriodiphenyl ether-3-sulfonic acid is coupled with 2-acetylmethyl-amino-8-riaphthol-6-sulfonic acid.
The dye thus obtained forms a red water-soluble powder after drying and dyes the animal fibers from acid baths in very level, bright red shades of very good lightfastness. <I> Example: </I> 26.4 kg 4-AmiDodiphenylätbei - 3-sulfonic acid are dissolved in water with the addition of hot soda and mixed with a solution of 6,
9 kg of sodium nitrite and the necessary amount of hydrochloric acid are diazotized with cooling. The diazotization liquid thus obtained is allowed to run into a solution of 31 kg of 2-acetylmethylamino-8-naphthol-6-sulfonic acid to which excess sodium bicarbonate has been added. After the coupling has ended, the dye thus obtained is isolated and dried.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE182594X | 1932-10-13 | ||
| CH175678T | 1933-09-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH182594A true CH182594A (en) | 1936-02-15 |
Family
ID=25719727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH182594D CH182594A (en) | 1932-10-13 | 1933-09-28 | Process for the preparation of a monoazo dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH182594A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3143541A (en) * | 1961-12-14 | 1964-08-04 | Geigy Ag J R | Monoazo dyestuffs |
-
1933
- 1933-09-28 CH CH182594D patent/CH182594A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3143541A (en) * | 1961-12-14 | 1964-08-04 | Geigy Ag J R | Monoazo dyestuffs |
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