CH204523A - Process for the production of a chromium-containing dye. - Google Patents
Process for the production of a chromium-containing dye.Info
- Publication number
- CH204523A CH204523A CH204523DA CH204523A CH 204523 A CH204523 A CH 204523A CH 204523D A CH204523D A CH 204523DA CH 204523 A CH204523 A CH 204523A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- production
- dye
- containing dye
- parts
- 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
- C09B55/00—Azomethine dyes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Herstellung eines ehromhaltigen Farbstoffes. Es wurde gefunden, dass man einen wert vollen neuen chromhaltigen Farbstoff er hält, wenn man 4-Nitro-2-aminophenol-6-sul- fonsäure mit Salicylaldehyd umsetzt und die entstehende Azomethinverbindung mit einem chromabgebenden Mittel behandelt.
Man kann dabei sowohl bei gewöhnlichem als auch bei erhöhtem Druck arbeiten.
Der neue Farbstoff kann zum Beispiel zum Färben von Lacken, Wolle, Seide, Leder, Baumwolle oder Kunstseide verwendet wer den. Er ist auch zum Färben in saurem Bade geeignet.
<I>Beispiel:</I> Zu einem siedenden Gemisch von 23,4 Teilen 4-Nitro-2-aminophenol-6-sulfonsäure, 28 Teilen kristallisiertem Natriumacetat, 12,2 Teilen Salicylaldehyd und 200 Teilen Was ser gibt man eine Chromformiatlösung, die aus 37,2 Teilen eines 24,5prozentigen Chrom ogydteiges, 19 Teilen 85prozentiger Ameisen säure und 100 Teilen Wasser hergestellt ist.
Nach etwa dreistündigem Kochen unter Rückfluss wird die Lösung eingedampft. Man kann auch die erhaltene Verbindung aus salzen, absaugen und trocknen.
Der Farbstoff entsteht auch, wenn man das Umsetzungsgemisch 2 Stunden lang auf 120' C erhitzt. Er färbt Wolle, Seide oder Leder gleichmässig und echt in gelben Tönen.
An Stelle von Chromformiat kann man auch andere Chromsalze anwenden.
Process for the preparation of a dye containing Ehrom. It has been found that a valuable new chromium-containing dye is obtained if 4-nitro-2-aminophenol-6-sulphonic acid is reacted with salicylaldehyde and the resulting azomethine compound is treated with a chromium-releasing agent.
You can work at both normal and increased pressure.
The new dye can be used, for example, to dye paints, wool, silk, leather, cotton or rayon. It is also suitable for dyeing in an acid bath.
<I> Example: </I> A chromium formate solution is added to a boiling mixture of 23.4 parts of 4-nitro-2-aminophenol-6-sulfonic acid, 28 parts of crystallized sodium acetate, 12.2 parts of salicylaldehyde and 200 parts of water, which is made from 37.2 parts of a 24.5 percent chromium ogydteiges, 19 parts of 85 percent formic acid and 100 parts of water.
After refluxing for about three hours, the solution is evaporated. The compound obtained can also be salted, filtered off with suction and dried.
The dye is also formed when the reaction mixture is heated at 120 ° C. for 2 hours. It dyes wool, silk or leather evenly and genuinely in yellow tones.
Instead of chromium formate, other chromium salts can also be used.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE207827X | 1937-04-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH204523A true CH204523A (en) | 1939-05-15 |
Family
ID=5793911
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH204523D CH204523A (en) | 1937-04-16 | 1938-04-04 | Process for the production of a chromium-containing dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH204523A (en) |
-
1938
- 1938-04-04 CH CH204523D patent/CH204523A/en unknown
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