CH125368A - Process for the production of a sulfur dye. - Google Patents
Process for the production of a sulfur dye.Info
- Publication number
- CH125368A CH125368A CH125368DA CH125368A CH 125368 A CH125368 A CH 125368A CH 125368D A CH125368D A CH 125368DA CH 125368 A CH125368 A CH 125368A
- Authority
- CH
- Switzerland
- Prior art keywords
- urea
- production
- parts
- new dye
- sulfur
- 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
Zusatzpatent zum Hauptpatent Nr. 105237. Verfahren zur Herstellung eines Schwefelfarbstoffes. Es wurde gefunden, dass man einen neuen Farbstoff erhält, wenn man die Leukover- bindung des Indophenols, das erhalten wird durch Kondensieren eines Gemisches von Carbazol und N-Äthylcarbazol mit Nitroso- phenol, in Gegenwart von o-Tolylharnstoff und Harnstoff, gegebenenfalls unter Zusatz eines Substrates, wie Kochsalz oder Natrium sulfat,
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, grünblauen Tönen gefärbt wird.
<I>Beispiel:</I> 28 Teile eines Indophenols, das durch Kondensation einer Mischung von gleichen Teilen N-Äthylcarbazol und Carbazol mit Nitrosophenol erhalten worden ist, werden in eine konzentrierte Polysulfidlösung, be stehend aus 29 Teilen kristallisiertem Natrium sulfid, 8 Teilen Schwefel, 15 bis 20 Teilen .Wasser eingetragen und gerührt, bis das Indophenol vollständig reduziert ist.
Sodann gibt man der Masse 12 Teile Schwefel, 12 Teile Harnstoff und 16 Teile o-Tolyl- harnstoff zu, trocknetsie im Vakuum und erhitzt das zerkleinerte Produkt in einem geeigneten Ofen auf 185-190 , 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 gewaschen und getrocknet.
Additional patent to main patent No. 105237. Process for the production of a sulfur dye. It has been found that a new dye is obtained if the leuco compound of indophenol, which is obtained by condensing a mixture of carbazole and N-ethylcarbazole with nitrosophenol, in the presence of o-tolylurea and urea, optionally with addition a substrate such as table salt or sodium sulfate,
treated with sulfur at a higher temperature. 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, green-blue tones.
<I> Example: </I> 28 parts of an indophenol, which has been obtained by condensation of a mixture of equal parts of N-ethylcarbazole and carbazole with nitrosophenol, are converted into a concentrated polysulfide solution, consisting of 29 parts of crystallized sodium sulfide, 8 parts Sulfur, 15 to 20 parts .Water added and stirred until the indophenol is completely reduced.
Then 12 parts of sulfur, 12 parts of urea and 16 parts of o-tolyl urea are added to the mass, they are dried in vacuo and the comminuted product is heated to 185-190 in a suitable oven until the evolution of hydrogen sulfide has ceased. 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.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH125368T | 1926-04-30 | ||
CH105237T | 1926-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH125368A true CH125368A (en) | 1928-04-16 |
Family
ID=25706847
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH125368D CH125368A (en) | 1926-04-30 | 1926-04-30 | Process for the production of a sulfur dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH125368A (en) |
-
1926
- 1926-04-30 CH CH125368D patent/CH125368A/en unknown
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