CH140419A - Process for the preparation of a vat dye of the anthanthrone series. - Google Patents
Process for the preparation of a vat dye of the anthanthrone series.Info
- Publication number
- CH140419A CH140419A CH140419DA CH140419A CH 140419 A CH140419 A CH 140419A CH 140419D A CH140419D A CH 140419DA CH 140419 A CH140419 A CH 140419A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- water
- dyeings
- series
- Prior art date
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Description
Verfahren zur Darstellung eines Farbstoffes der Phenonaphtosafraninreihe. Es wurde gefunden, dass ein neuer, wert voller Farbstoff entsteht, wenn man die wasserunlösliche Phenoriaphtosafranin-16-mo- nösulfosäure der Formel
EMI0001.0007
mit sulfierenden Mitteln behandelt.
Der neue Farbstoff enthält die eine Sul- fogruppe in 16-Stellung (Orthostellung zum Safraninstickstoff), wodurch die vorzügliche Alkaliechtheit der mit ihm hergestellten Fär bungen bedingt ist, während die durch die Sulfierung eintretende Sulfogrrippe in den Benzolkern der 3-Ätliylberizylamino-Gruppe zu stehen kommt.
Der Farbstoff ist ein dunkles Pulver, das in Wasser mit blauer Farbe, in konzentrierter Shwefelsäure grasgrün löslich ist. Beispiel: 52 Teile 6-Sulfo-3-äthylbenzylisorosinduliri (hergestellt durch Kondensation von 2-Phe- riylnaphtylarnin mit 4-Nitroso-l-äthylbenz3-1- anilin, behandeln mit Stilfit und nachfolgende Oxydation)
werden mit 400 Teilen Alkohol unter Rühren aufgekocht und 25 Teile 1 Methyl-2- äthylamino- 5 -amiriobenzol-4-siilfo- säure in konzentrierter wässeriger Lösung als Natriumsalz zugegeben. Nach Zusatz von 20 Teilen Natriumacetat wird so lange ge kocht, bis die Schwefelsäurereaktion grün geworden ist. Hierauf wird der Alkohol ab destilliert, der entstandene Niederschlag mit Wasser salzfrei gewaschen und scharf ge trocknet.
Zur Sulfierung wird ein Teil des Farbstoffpulvers in 5 Teile 30o/'oiges Oleum eingetragen und so lange gerührt, bis sich eine Probe in verdfnnter Soda löst. Dann wird auf Fis gegossen, die ausgefällte freie Farbstoffdisulfosäure filtriert und mit Koch salzlösung schwefelsäurefrei gewaschen. Die Farbsäure wird nun mit verdünnter Soda lösung gelöst, uni der fertige Farbstoff mit Salz gefällt. Wolle wird aus schwach saurem Bade grünstichig blau gefärbt.
Die Färbungen sind vorzüglich licht-, alkali- und walkecht.
Process for the preparation of a dye of the phenonaphtosafranine series. It has been found that a new, valuable dye is created if the water-insoluble phenoriaphtosafranin-16-monosulfonic acid of the formula
EMI0001.0007
treated with sulphurizing agents.
The new dye contains one sulfo group in the 16-position (ortho position to safranine nitrogen), which is the reason for the excellent alkali fastness of the dyeings made with it, while the sulfo group resulting from the sulfation is in the benzene nucleus of the 3-ethylbericylamino group comes.
The dye is a dark powder that is soluble in water with a blue color, in concentrated sulfuric acid it is grass-green. Example: 52 parts of 6-sulfo-3-äthylbenzylisorosinduliri (produced by condensation of 2-phenylnaphthylarnine with 4-nitroso-1-ethylbenz3-1-aniline, treated with Stilfit and subsequent oxidation)
are boiled with 400 parts of alcohol while stirring, and 25 parts of 1-methyl-2-ethylamino-5-amiriobenzene-4-silfoic acid in concentrated aqueous solution are added as the sodium salt. After adding 20 parts of sodium acetate, the mixture is boiled until the sulfuric acid reaction has turned green. The alcohol is then distilled off, the precipitate formed is washed free of salt with water and dried sharply.
For sulfonation, part of the dye powder is added to 5 parts of 30% oleum and stirred until a sample dissolves in dilute soda. It is then poured onto Fis, the precipitated free dye disulfonic acid is filtered and washed free of sulfuric acid with sodium chloride solution. The coloring acid is now dissolved with a dilute soda solution and the finished coloring is precipitated with salt. Wool is dyed a greenish blue from a weakly acidic bath.
The dyeings are extremely lightfast, alkalifast and waterfast.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE140419X | 1927-09-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH140419A true CH140419A (en) | 1930-06-15 |
Family
ID=5668213
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH140419D CH140419A (en) | 1927-09-21 | 1928-09-20 | Process for the preparation of a vat dye of the anthanthrone series. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH140419A (en) |
-
1928
- 1928-09-20 CH CH140419D patent/CH140419A/en unknown
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