CH171595A - Process for the preparation of a chromium-containing azo dye. - Google Patents
Process for the preparation of a chromium-containing azo dye.Info
- Publication number
- CH171595A CH171595A CH171595DA CH171595A CH 171595 A CH171595 A CH 171595A CH 171595D A CH171595D A CH 171595DA CH 171595 A CH171595 A CH 171595A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- dye
- azo dye
- dissolves
- blue
- 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
- C09B45/00—Complex metal compounds of azo dyes
- C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
- C09B45/14—Monoazo compounds
- C09B45/16—Monoazo compounds containing chromium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 167803. Verfahren zur Illerstellung eines ehromhaltigen Azofarbstoffes. Es wurde gefunden, dass man einen chrom- haltigen Azofarbstoff herstellen kann, wenn rnan den Azofarbstoff aus diazotierter 1- Amirro-2-oxyrraphthalin-4-srrlforisäure und 2- Oxyrraphthalin mit einem chromabgebenden Mittel in solchen Mengen,
dass der chromier- baren Gruppe des Farbstoffmoleküls weniger als 1 Atom Chrom entspricht, sowie in Ge genwart löslicher Salze organischer Säuren behandelt.
Der erhaltene chromhaltige Farbstoff stellt ein violettschwarzes Pulver dar, das sich in Wasser mit rotstichigblauer, rot dichroitischer Farbe leicht löst. In 10 %iger Sodalösung und in 10 %iger Natronlauge löst sich der Farbstoff mit rotstichigblauer Farbe, während er sich in konzentrierter Schwefelsäure mit grünstichigblauer Farbe löst. Aus organischsaurem-schwefelsaurem Bade wird Wolle in echten marineblauen Tönen gefärbt.
Beispiel: In einem Druckgefäss werden 83,2 Teile es Azofarbstoffes aus diazotierter 1-Amino- 2-oxyrraphthalin-4-sulfonsäur-e und 2-Oxy- naphthalin in 1200 Teilen Wasser aufge schlämmt. Hierauf gibt man 10 Vol.-Teile 30 o/oiger Natronlauge, 30 Teile Natrium- formiat, sowie eine Chromformiatlösung, ent sprechend 8 Teilen Crs0s zu und erhitzt 3-4 Stunden auf 120-130 0.
Nach dem Er kalten wird von geringen Mengen unlöslicher Anteile abfiltriert und die schwärzlichblaue Lösung im Vakuum zur Trockne verdampft.
Zu demselben Farbstoffe gelangt man, wenn statt Chromformiat andere chromab gebende Mittel; wie z. B. Chromfluorid, Chromacetat, benzolsulfonsaurPes Chrom oder Gemische solcher Chromierungsmittel ver wendet werden.
Ebenso wird der gleiche Farbstoff erhalten, wenn das im Beispiele verwendete Natrium- formiat durch andere lösliche Salze organischer Säuren; wie z. B. Natriumacetat oder durch Natriumoxalat ersetzt wird.
Additional patent to main patent No. 167803. Process for the production of an azo dye containing Ehrom. It has been found that a chromium-containing azo dye can be produced if the azo dye is made from diazotized 1-amirro-2-oxyrraphthalene-4-syrlforic acid and 2-oxyrraphthalene with a chromium-releasing agent in such amounts
that the chromable group of the dye molecule corresponds to less than 1 atom of chromium, as well as treated in the presence of soluble salts of organic acids.
The chromium-containing dye obtained is a violet-black powder which easily dissolves in water with a reddish blue, red dichroic color. In 10% soda solution and in 10% sodium hydroxide solution, the dye dissolves with a reddish blue color, while it dissolves in concentrated sulfuric acid with a greenish blue color. From organic acid-sulfuric acid bath, wool is dyed in real navy blue tones.
Example: 83.2 parts of the azo dye made from diazotized 1-amino-2-oxyrraphthalene-4-sulfonic acid and 2-oxynaphthalene are suspended in 1200 parts of water in a pressure vessel. 10 parts by volume of 30% sodium hydroxide solution, 30 parts of sodium formate and a chromium formate solution, corresponding to 8 parts of CrsOs, are then added and the mixture is heated to 120-130 ° for 3-4 hours.
After the cold, small amounts of insoluble components are filtered off and the blackish-blue solution is evaporated to dryness in vacuo.
The same dyes are obtained if, instead of chromium formate, other chromium donating agents; such as B. chromium fluoride, chromium acetate, benzenesulfonic acid chromium or mixtures of such chromating agents can be used.
The same dye is also obtained if the sodium formate used in the example is replaced by other soluble salts of organic acids; such as B. sodium acetate or is replaced by sodium oxalate.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH167803T | 1933-01-25 | ||
CH171595T | 1933-01-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH171595A true CH171595A (en) | 1934-08-31 |
Family
ID=25718465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH171595D CH171595A (en) | 1933-01-25 | 1933-01-25 | Process for the preparation of a chromium-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH171595A (en) |
-
1933
- 1933-01-25 CH CH171595D patent/CH171595A/en unknown
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