CH122272A - Process for the production of a sulfur dye. - Google Patents
Process for the production of a sulfur dye.Info
- Publication number
- CH122272A CH122272A CH122272DA CH122272A CH 122272 A CH122272 A CH 122272A CH 122272D A CH122272D A CH 122272DA CH 122272 A CH122272 A CH 122272A
- Authority
- CH
- Switzerland
- Prior art keywords
- production
- sulfur
- parts
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
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 Karbanilid und von Harnstoff, gegebenenfalls unter Zu satz eines Substrates, wie Kochsalz oder Natriumsulfat, mit Schwefel bei höherer Tem peratur behandelt.
Der neue Farbstoff bildet ein dunkelblaues Pulver, gibt mit Hydrosul- fit und Natronlauge eine hellgelbe Küpe, aus welcher Baumwolle in wasch-, licht- und chlorechten, blauen Tönen gefärbt wird.
<I>Beispiel:</I> 27,2 Teile des Indophenols, erhalten durch Kondensation von Nitrosophenol mit Karba- zol, werden in eine konzentrierte Polysulfid lösung, bestehend aus 29 Teilen kristallisier tem Natriumsulfid, 8 Teilen Schwefel, 15 bis 20 Teilen Wasser eingetragen und gerührt, bis das Indophenol vollständig reduziert ist.
Sodann gibt man der Masse 12 Teile Schwe fel, 12 Teile Harnstoff und<B>16</B> Teile Karba- nilid zu, trocknet sie im Vakuum und erhitzt das zerkleinerte Produkt in einem geeigneten Ofen auf 185-2000, und zwar solange, bis die Schwefelwasserstoffentwicklung beendet ist. Nach dem Erkalten wird das Backgut fein gemahlen, nacheinander mit verdünnter Schwefelnatriumlösung ausgezogen, mit ver dünnter Salzsäure gewaschbn und getrocknet. Der Farbstoff färbt Baumwolle aus der Hydro- sulfitküpe blau.
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 carbazole and urea, optionally with the addition of a substrate such as sodium chloride or sodium sulfate .
The new dye forms a dark blue powder and, together with hydrosulfate and caustic soda, gives a light yellow vat from which cotton is dyed in wash-, light- and chlorine-fast blue tones.
<I> Example: </I> 27.2 parts of indophenol, obtained by condensation of nitrosophenol with carbazole, are dissolved in a concentrated polysulphide solution consisting of 29 parts of crystallized sodium sulphide, 8 parts of sulfur and 15 to 20 parts of water registered and stirred until the indophenol is completely reduced.
Then 12 parts of sulfur, 12 parts of urea and <B> 16 </B> parts of carbanilide are added to the mass, they are dried in a vacuum and the comminuted product is heated to 185-2000 in a suitable oven for as long as until the evolution of hydrogen sulfide has ended. After cooling, the baked goods are finely ground, extracted one after the other with dilute sodium sulphide solution, washed with dilute hydrochloric acid and dried. The dye dyes cotton from the hydrosulfite vat blue.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH122272T | 1926-04-30 | ||
CH105237T | 1926-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH122272A true CH122272A (en) | 1927-09-01 |
Family
ID=25706842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH122272D CH122272A (en) | 1926-04-30 | 1926-04-30 | Process for the production of a sulfur dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH122272A (en) |
-
1926
- 1926-04-30 CH CH122272D patent/CH122272A/en unknown
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