CH181165A - Process for the preparation of a water-insoluble azo dye. - Google Patents
Process for the preparation of a water-insoluble azo dye.Info
- Publication number
- CH181165A CH181165A CH181165DA CH181165A CH 181165 A CH181165 A CH 181165A CH 181165D A CH181165D A CH 181165DA CH 181165 A CH181165 A CH 181165A
- Authority
- CH
- Switzerland
- Prior art keywords
- water
- insoluble azo
- azo dye
- preparation
- dye
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Herstellung eines wasserunlöslichen Azofarbstoifes. Vorliegendes Patent bezieht sich auf ein Verfahren zur Herstellung eines wasser unlöslichen Azofarbstoffes, dadurch gekenn zeichnet, dass man die Diazoverbindung des 1-Aminobenzol-2 . 4-diäthylsulfons mit 1- (2'. 3'-Oxynaphthoylamino)-4-chlor-2-methyl- benzol kombiniert.
Der so erhaltene Monoazofarbstoff ist ein leuchtend hellgelbrotes Pulver. Er wird zweckmässig in Pastenform verwandt und liefert wertvolle goldorange Farblacke und Färbungen, wenn auf der vegetabilischen Faser erzeugt.
<I>Beispiel:</I> 2,8 Teile 1-Aminobenzol-2.4-diäthylsul- fon werden bei 30 C mit 3,2 Teilen Nitro- sylschwefelsäure diazotiert und die Reak tionsmasse auf Eis gegeben.
Die so erhaltene klare Diazolösung wird mit einer Lösung von 3,2 Teilen 1-(3'-3'-Oxynaphthoylamino)- 4-chlor-2-methylbenzol in verdünnter Na- tronlauge kombiniert, die mit Türkischrotöl und einer zum Absättigen des Mineralsäure überschusses genügenden Menge Natrium acetat versetzt ist. Der ausgeschiedene Farb stoff wird abfiltriert und gut gewaschen.
Process for the production of a water-insoluble azo dye. The present patent relates to a process for the preparation of a water-insoluble azo dye, characterized in that the diazo compound of 1-aminobenzene-2. 4-diethyl sulfone combined with 1- (2 ', 3'-oxynaphthoylamino) -4-chloro-2-methylbenzene.
The monoazo dye thus obtained is a bright, light yellow-red powder. It is expediently used in paste form and provides valuable gold-orange colored lacquers and dyes if produced on the vegetable fiber.
<I> Example: </I> 2.8 parts of 1-aminobenzene-2,4-diethylsulphone are diazotized at 30 ° C. with 3.2 parts of nitrosylsulphuric acid and the reaction mass is poured onto ice.
The clear diazo solution obtained in this way is combined with a solution of 3.2 parts of 1- (3'-3'-oxynaphthoylamino) -4-chloro-2-methylbenzene in dilute sodium hydroxide solution, which is mixed with Turkish red oil and one to saturate the excess mineral acid sufficient amount of sodium acetate is added. The precipitated dye is filtered off and washed well.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE181165X | 1933-05-23 | ||
CH175358T | 1934-05-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH181165A true CH181165A (en) | 1935-11-30 |
Family
ID=25719682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH181165D CH181165A (en) | 1933-05-23 | 1934-05-14 | Process for the preparation of a water-insoluble azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH181165A (en) |
-
1934
- 1934-05-14 CH CH181165D patent/CH181165A/en unknown
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