CH141024A - Process for the preparation of a strongly basic azo dye. - Google Patents
Process for the preparation of a strongly basic azo dye.Info
- Publication number
- CH141024A CH141024A CH141024DA CH141024A CH 141024 A CH141024 A CH 141024A CH 141024D A CH141024D A CH 141024DA CH 141024 A CH141024 A CH 141024A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- strongly basic
- azo dye
- phenylenediamine
- basic azo
- Prior art date
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- Coloring (AREA)
Description
Verfahren zur Darstellung eines stark basischen Azofarbstoffes. Es wurde gefunden, dass ein wertvoller, stark basischer Farbstoff entsteht, wenn man die Diazoverbindung des Pyridacetyl-m-phe- nylendiamins mit Pyridacetyl-m-phenylendi- amin kuppelt, den entstandenen Zwischen körper nochmals diazotiert und mit N-Mono- äthyl-p-naphtylamin kuppelt.
<I>Beispiel:</I> Eine mit 30 kg konzentrierter Salzsäure versetzte Lösung von 26,35 kg Pyridacetyl- m-phenylendiamiri wird mit 6,9 kg Natrium nitrit wie üblich diazotiert. Die Mineralsäure wird mit Natriumacetat abgestumpft. Diese Diazolösung lässt man in eine neutrale, mit 15 kg Natriumacetat versetzte Lösung von 26,35 kg Pyi-idacetyl-m-phenylendiamin ein laufen.
Der Zwischenkörper fällt kristallisiert aus, er wird abfiltriert, nochmals in 500 1 Wasser gelöst und auf übliche Weise diazo- Eiert. Die Mineralsäure stumpft man mit Natriumacetat ab, gibt weitere 35 kg Na triumacetat hinzu und lässt in diese Diazo- lösung eine Lösung von 17,5 kg N-Mono- äthyl-p-naphtylamin in 300 1 Wasser und 12 kg konzentrierte Salzsäure einlaufen. Der abgeschiedene Farbstoff wird filtriert und getrocknet; er stellt ein dunkles Pulver dar, das sich in Wasser mit rein violetter, in konzentrierter Schwefelsäure mit grünblauer Farbe löst.
Die Ausfärbungen auf tannierten Baumwolle und Seide sind rein blauviolett und zeichnen sich durch hervorragende Wasch- und gute Lichtechtheit aus. .
Process for the preparation of a strongly basic azo dye. It has been found that a valuable, strongly basic dye is formed when the diazo compound of pyridacetyl-m-phenylenediamine is coupled with pyridacetyl-m-phenylenediamine, the intermediate body formed is diazotized again and with N-monoethyl-p -naphtylamine couples.
<I> Example: </I> A solution of 26.35 kg of pyridacetyl-m-phenylenediamine mixed with 30 kg of concentrated hydrochloric acid is diazotized with 6.9 kg of sodium nitrite as usual. The mineral acid is blunted with sodium acetate. This diazo solution is run into a neutral solution of 26.35 kg of pyi-idacetyl-m-phenylenediamine to which 15 kg of sodium acetate have been added.
The intermediate body precipitates in crystalline form, it is filtered off, redissolved in 500 l of water and diazo-Eiert in the usual way. The mineral acid is blunted with sodium acetate, a further 35 kg of sodium acetate are added and a solution of 17.5 kg of N-monoethyl-p-naphthylamine in 300 l of water and 12 kg of concentrated hydrochloric acid is allowed to run into this diazo solution. The deposited dye is filtered and dried; it is a dark powder that dissolves in water with a purely violet color, in concentrated sulfuric acid with a green-blue color.
The colorations on tanned cotton and silk are pure blue-violet and are characterized by excellent washfastness and good lightfastness. .
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE141024X | 1927-08-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH141024A true CH141024A (en) | 1930-07-15 |
Family
ID=5668476
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH141024D CH141024A (en) | 1927-08-06 | 1928-07-28 | Process for the preparation of a strongly basic azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH141024A (en) |
-
1928
- 1928-07-28 CH CH141024D patent/CH141024A/en unknown
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