CH108863A - Process for the preparation of a sulfur-containing vat dye. - Google Patents
Process for the preparation of a sulfur-containing vat dye.Info
- Publication number
- CH108863A CH108863A CH108863DA CH108863A CH 108863 A CH108863 A CH 108863A CH 108863D A CH108863D A CH 108863DA CH 108863 A CH108863 A CH 108863A
- Authority
- CH
- Switzerland
- Prior art keywords
- sulfur
- preparation
- benzothionaphthene
- anilene
- dye
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines schwefelhaltigen Nüpenfarbstoffes.
EMI0001.0002
der nachträglichen Behandlung mit Brom unterwirft. Hierdurch wird nicht nur eine überraschende Verschiebung- der Nuance be wirkt, sondern auch die Echtheit der neuen Farbstoffe bedeutend gehoben. Der neue Farb stoff stellt ein violettes Pulver dar und ist unlöslich in verdünnten Säuren und Alkalien, löslich in konzentrierter Schwefelsäure.
<I>Beispiel:</I> 10 Teile des Kondensationsproduktes aus 2 - 3-Diketodihydrothionaphten-2-(p-dimethyl- amino)anil und 3-Oxy-5 # 6-benzothionaphten werden unter Rühren in 100 Teile Nitrobenzol eingetragen und bei gewöhnlicher Temperatur mit 10 Teilen Brom versetzt. Alsdann heizt man langsam auf 150-1601 und erhitzt so lange, bis kein Bromwasserstoff mehr ent weicht und nahezu alles Brom verschwunden ist. Die ursprüngliche, grauschwarze Farbe des Ausgangsmaterials geht dabei in violett über. Nach dem Erkalten verdünnt man mit wenig Alkohol, saugt ab und wäscht mit Alkohol nach.
Man erhält ein dunkelviolettes Pulver, das mit alkalischem Hydrosulfit eine klare, orange Küpe liefert, aus welcher Wolle und Baumwolle in lebhaft violetten Tönen von hervorragender Echtheit angefärbt wird. Es wurde gefunden, dass man einen neuen Küpenfarbstoff von hervorragender Echtheit erhält,
wenn man das Kondensationsprodukt aus 3-Oxy-5 # 6-benzothionaphten mit 2- Anilen des 2 - 3-Diketodihydrothionaphtens bezw. aus Oxythionaphten mit 2-Anilen des 2 - 3-Diketo- dihydro - 5 # 6 - benzothionaphtens von der Formel
Process for the preparation of a sulfur-containing pomace dye.
EMI0001.0002
the subsequent treatment with bromine. This not only causes a surprising shift in the shade, but also significantly increases the authenticity of the new dyes. The new dye is a purple powder and is insoluble in dilute acids and alkalis, and soluble in concentrated sulfuric acid.
<I> Example: </I> 10 parts of the condensation product of 2-3-diketodihydrothionaphten-2- (p-dimethylamino) anil and 3-oxy-5 # 6-benzothionaphthene are added to 100 parts of nitrobenzene with stirring and added to Ordinary temperature mixed with 10 parts of bromine. Then heat slowly to 150-1601 and heat until no more hydrogen bromide escapes and almost all the bromine has disappeared. The original, gray-black color of the starting material changes to purple. After cooling, it is diluted with a little alcohol, vacuumed and washed with alcohol.
A dark violet powder is obtained which, with alkaline hydrosulfite, gives a clear, orange vat from which wool and cotton are dyed in vivid violet shades of excellent fastness. It has been found that a new vat dye of excellent fastness is obtained,
if the condensation product of 3-oxy-5 # 6-benzothionaphthene with 2- anilene of 2-3-diketodihydrothionaphthene or. from oxythionaphthene with 2-anilene of 2 - 3-diketodihydro - 5 # 6 - benzothionaphthene of the formula
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE108863X | 1923-02-09 | ||
CH108493T | 1924-02-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH108863A true CH108863A (en) | 1925-02-16 |
Family
ID=25707386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH108863D CH108863A (en) | 1923-02-09 | 1924-02-05 | Process for the preparation of a sulfur-containing vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH108863A (en) |
-
1924
- 1924-02-05 CH CH108863D patent/CH108863A/en unknown
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