CH125365A - Process for the production of a sulfur dye. - Google Patents
Process for the production of a sulfur dye.Info
- Publication number
- CH125365A CH125365A CH125365DA CH125365A CH 125365 A CH125365 A CH 125365A CH 125365D A CH125365D A CH 125365DA CH 125365 A CH125365 A CH 125365A
- Authority
- CH
- Switzerland
- Prior art keywords
- production
- sulfur
- parts
- urea
- new dye
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Indole Compounds (AREA)
Description
Zusatzpatent zum Hauptpatent Nr.<B>105237.</B> Verfahren zur Herstellung eines Schwefelfarbstoffes. Es wurde gefunden, dass man einen neuen Farbstoff erhält, wenn man die Leukover- bindung des Indophenols aus Carbazol und Nitrosophenol in Gegenwart von o-Ditolyl- harnstoff und von Harnstoff, gegebenenfalls unter Zusatz 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, blauen Tönen gefärbt wird. Beispiel: 27,2 Teile des Indophenols, erhalten durch Kondensation von Nitrosophenol mit Carbazol, werden in eine konzentrierte Polysulfidlösung, bestehend aus 29 Teilen kristallisiertem Na triumsulfid, 8 Teilen Schwefel, 15 bis 20 Teilen Wasser eingetragen und gerührt, bis das Indophenol vollständig reduziert ist.
So dann gibt man der Masse 12 Teile Schwefel, 12 Teile Harnstoff und 16' Teile o-Ditolyl- harnstoff zu, trocknet sie im Vakuum und erhitzt das zerkleinerte Produkt in einem geeigneten Ofen auf 185-200 , und zwar so lange, bis die Schwefelwasserstoffentwick- lung beendet ist. Nach dem Erkalten wird das Backgut fein gemahlen, nacheinander mit verdünnter Schwefelnatriumlösung aus gezogen, mit verdünnter Salzsäure gewaschen und getrocknet.
Additional patent to main patent no. <B> 105237. </B> Process for the production of a sulfur dye. It has been found that a new dye is obtained if the leuco compound of indophenol is formed from carbazole and nitrosophenol in the presence of o-ditolyl urea and urea, optionally with the addition of a substrate such as sodium chloride or sodium sulfate, with sulfur at a higher level Temperature treated:
The new dye forms a dark blue powder and, with hydrosulphite and sodium hydroxide solution, gives a light yellow vat from which cotton is dyed in wash, light and chlorine-fast blue tones. Example: 27.2 parts of indophenol, obtained by condensation of nitrosophenol with carbazole, are introduced into a concentrated polysulphide solution consisting of 29 parts of crystallized sodium sulphide, 8 parts of sulfur, 15 to 20 parts of water and stirred until the indophenol is completely reduced .
Then 12 parts of sulfur, 12 parts of urea and 16 parts of o-ditolyl urea are added to the mass, they are dried in vacuo and the comminuted product is heated to 185-200 in a suitable oven until the hydrogen sulfide is evolved - treatment has ended. After cooling, the baked goods are finely ground, drawn out one after the other with dilute sodium sulphide solution, washed with dilute hydrochloric acid and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH125365T | 1926-04-30 | ||
CH105237T | 1926-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH125365A true CH125365A (en) | 1928-04-16 |
Family
ID=25706844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH125365D CH125365A (en) | 1926-04-30 | 1926-04-30 | Process for the production of a sulfur dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH125365A (en) |
-
1926
- 1926-04-30 CH CH125365D patent/CH125365A/en unknown
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