CH129180A - Process for the preparation of a monoazo dye. - Google Patents
Process for the preparation of a monoazo dye.Info
- Publication number
- CH129180A CH129180A CH129180DA CH129180A CH 129180 A CH129180 A CH 129180A CH 129180D A CH129180D A CH 129180DA CH 129180 A CH129180 A CH 129180A
- Authority
- CH
- Switzerland
- Prior art keywords
- yellow
- preparation
- dye
- monoazo dye
- water
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Monoazofarbstoffes. Es wurde gefunden, dass ein wertvoller gelber Monoazofarbstoff entsteht, wenn man die Diazoverbindung der 1-Amino-2-sulfo-4- chlorbeirzol-5-carbonsäur,e mit 1-(2'-Chlor-5'- sulfophenyl)-3-metliyl-5-pyrazolon kombiniert.
<I>Beispiel:</I> 50,3 kg 1-Amino-2-sulfo-4-chlorbenzol-5- carbonsäure werden in 500- Liter Wasser verteilt und nach Zusatz von 25 kg Salzsäure von 30 % mit 13,8 kg Natriumnitrit diano- tiert bei 10o.
Die Suspension der Diazover- bindung läuft in eine mit Natriumacetat ver setzte Lösung von 57,7 kg 1-(2'-Chlor-5'- solfophenyl)-3-methyl-5-pyrazolon in 500 Liter Wasser. Nach beendeter Kupplung wird der Farbstoff bei<B>60"</B> mit Salzsäure und Koch salz ausgefüllt, filtriert und getrocknet.
Der Farbstoff stellt ein gelbes Pulver dar, löslich in Wasser und konzentrierter Schwefelsäure mit zitronengelber Farbe. Er färbt auf Wolle ein grünstichiges Gelb von sehr guter Egalisierfähigkeit und grosser Lichtechtheit.
Process for the preparation of a monoazo dye. It has been found that a valuable yellow monoazo dye is formed when the diazo compound of 1-amino-2-sulfo-4-chlorbeirzol-5-carboxylic acid, e with 1- (2'-chloro-5'-sulfophenyl) -3- methyl-5-pyrazolone combined.
<I> Example: </I> 50.3 kg of 1-amino-2-sulfo-4-chlorobenzene-5-carboxylic acid are distributed in 500 liters of water and, after the addition of 25 kg of 30% hydrochloric acid, add 13.8 kg Sodium nitrite diano- tes at 10o.
The suspension of the diazo compound runs into a solution of 57.7 kg of 1- (2'-chloro-5'-solfophenyl) -3-methyl-5-pyrazolone in 500 liters of water with sodium acetate. After coupling is complete, the dye is filled in at <B> 60 "with hydrochloric acid and sodium chloride, filtered and dried.
The dye is a yellow powder, soluble in water and concentrated sulfuric acid with a lemon yellow color. It dyes wool a greenish yellow with very good leveling properties and great lightfastness.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE129180X | 1926-07-29 | ||
CH127529T | 1927-07-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH129180A true CH129180A (en) | 1928-12-01 |
Family
ID=25710913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH129180D CH129180A (en) | 1926-07-29 | 1927-07-08 | Process for the preparation of a monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH129180A (en) |
-
1927
- 1927-07-08 CH CH129180D patent/CH129180A/en unknown
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