CH119389A - Process for the production of a sulfur dye. - Google Patents
Process for the production of a sulfur dye.Info
- Publication number
- CH119389A CH119389A CH119389DA CH119389A CH 119389 A CH119389 A CH 119389A CH 119389D A CH119389D A CH 119389DA CH 119389 A CH119389 A CH 119389A
- Authority
- CH
- Switzerland
- Prior art keywords
- production
- sulfur
- new dye
- sulfur dye
- indophenol
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B49/00—Sulfur dyes
- C09B49/10—Sulfur dyes from diphenylamines, indamines, or indophenols, e.g. p-aminophenols or leucoindophenols
Description
Verfahren zur Herstellung eines Schwefelfarbstoffes. Es wurde gefunden, dass man einen neuen Farbstoff erhält, wenn man die Leukover- bindung des Indophenols aus Karbazol und Nitrosophenol in Gegenwart von Acetanilid und gegebenenfalls eines Substrates, wie Kochsalz oder Natriumsulfat, mit Schwefel bei höherer Temperatur behandelt.
Der neue Farbstoff bildet ein dunkelblaues Pulver, gibt mit Hydrosulfit und Natronlauge eine Hellgelbe Küpe, aus welcher Baumwolle in wasch-, licht- und chlorechten, rotstichig blauen Tönen gefärbt wird.
<I>Beispiel:</I> 27,2 Teile des Indophenols, erhalten durch Kondensation von Nitrosophenol und Kar- bazol, werden in eine konzentrierte Lösung von 29 Teilen kristallisiertem Natriumsulficl eingetragen und gerührt, bis das Indophenol vollständig reduziert ist. Hierauf trocknet man die ganze Masse und mischt sie sorg fältig mit 15 Teilen Acetanilid, 24 Teilen Schwefel und 10 Teilen Kochsalz. Die so er haltene Mischung wird nun bei zirka<B>180'</B> gebacken, bis die Entwicklung von Schwefel ivasserstoff aufgehört hat.
Das erhaltene Produkt wird nach dem Erkalten fein ge mahlen, mit verdünntem Schwefelnatrium, hierauf mit Wasser und endlich, zwecks Ent- f ernung von geringen Mengen noch vorhan dener organischer Basen, mit verdünnter Salzsäure ausgewaschen.
Process for the production of a sulfur dye. It has been found that a new dye is obtained if the leuco compound of indophenol from carbazole and nitrosophenol is treated with sulfur at a higher temperature in the presence of acetanilide and, if appropriate, a substrate such as sodium chloride or sodium sulfate.
The new dye forms a dark blue powder and, with hydrosulfite and sodium hydroxide solution, creates a light yellow vat from which cotton is dyed in washable, lightfast and chlorine-resistant, reddish blue tones.
<I> Example: </I> 27.2 parts of the indophenol, obtained by condensation of nitrosophenol and carbazole, are introduced into a concentrated solution of 29 parts of crystallized sodium sulphide and stirred until the indophenol is completely reduced. The whole mass is then dried and carefully mixed with 15 parts of acetanilide, 24 parts of sulfur and 10 parts of table salt. The mixture obtained in this way is now baked at about <B> 180 '</B> until the evolution of hydrogen sulphide has stopped.
After cooling, the product obtained is finely ground, washed with dilute sodium sulphide, then with water and finally, for the purpose of removing small amounts of organic bases still present, with dilute hydrochloric acid.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH119389T | 1926-02-08 | ||
CH105237T | 1926-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH119389A true CH119389A (en) | 1927-03-16 |
Family
ID=25706840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH119389D CH119389A (en) | 1926-02-08 | 1926-02-08 | Process for the production of a sulfur dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH119389A (en) |
-
1926
- 1926-02-08 CH CH119389D patent/CH119389A/en unknown
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