CH172607A - 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
- CH172607A CH172607A CH172607DA CH172607A CH 172607 A CH172607 A CH 172607A CH 172607D A CH172607D A CH 172607DA CH 172607 A CH172607 A CH 172607A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- oxynaphthalene
- azo dye
- diazotized
- amino
- 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
Ztasatzpatent zum Hauptpatent Nr. 169699. Verfahren zur Herstellung eines chromhaltigen Azofarbstoffes. Es wurde befunden, dass durch Einwir kung chromabgebender Mittel auf ein Ge- tnisch aus dem Azofarbstoff aus diazotierter 1-Amino-2-oxynaphthalin-4-sulfonsäure und 2-Oxynaphthalin mit dem Azofarbstoff aus diazotierter 2-Amino-l-oxynaphthalin-4-sul- fonsäure und ?-Oxynaphthalin
ein chrom haltiger Azofarbstoff hergestellt werden kann, wenn als chromabgebende Mittel solche Mengen Alkalichromitlösungen verwendet werden, die auf die beiden chromierbaren Gruppen der Azofarbstoffe mindestens zwei Atome Chrom enthalten.
Der erhaltene chromhaltige Farbstoff stellt ein grauschwarzes Pulver dar, das sich in Wasser, sowie in 10 % iber Sodalösung mit schwärzlich blauvioletter und in 10%iger Natronlauge mit schwärzlich violetter Farbe löst. Er färbt Wolle aus orga.nischsaurem- sehwefelsaurern Bade in vorzüglich echten Marineblautönen.
Beispiel: 49,2 Teile einer 8%igen Chromoxyd hydratpaste, entsprechend 3,94 Teilen Cr2O3, werden mit 29,1 Teilen Ätzkali bei 60 bis 70 verrührt, bis vollständige Lösung ein getreten ist.
In diese Lösung werden 9,4 Teile des Azofarbstoffes aus diazotierter 1-Amino-2-oxynaphthalin-4-sulfonsäure und \2-Oxynaphthalin, sowie 9,4 Teile des Azo- farbstoffes aus diazotierter 2-Amino-l-oxy- naphthalin-4-sulfonsäure und 2-Oxynaphtha- lin eingetragen.
Das Reaktionsgemisch wird unter gutem Rühren 16 Stunden auf 74 bis 78 erwärmt, hierauf mit 300 Teilen kaltem Wasser verdünnt, mit verdünnter Mineral säure neutralisiert und der neue chromhaltige Farbstoff durch Beigabe von Kochsalz, ab geschieden.
Additional patent for main patent no. 169699. Process for the production of a chromium-containing azo dye. It was found that the action of chromium-donating agents on a mixture of the azo dye from diazotized 1-amino-2-oxynaphthalene-4-sulfonic acid and 2-oxynaphthalene with the azo dye from diazotized 2-amino-1-oxynaphthalene-4- sulphonic acid and? -oxynaphthalene
a chromium-containing azo dye can be produced if such amounts of alkali chromite solutions are used as the chromium-releasing agent which contain at least two chromium atoms for the two chromable groups of the azo dyes.
The chromium-containing dye obtained is a gray-black powder that dissolves in water and in 10% sodium carbonate solution with blackish blue-violet and in 10% sodium hydroxide solution with blackish-violet color. It dyes wool from organic and sulfuric acid baths in extremely real navy blue tones.
Example: 49.2 parts of an 8% chromium oxide hydrate paste, corresponding to 3.94 parts of Cr2O3, are stirred with 29.1 parts of caustic potash at 60 to 70 until complete dissolution has occurred.
9.4 parts of the azo dye from diazotized 1-amino-2-oxynaphthalene-4-sulfonic acid and \ 2-oxynaphthalene, and 9.4 parts of the azo dye from diazotized 2-amino-1-oxynaphthalene 4-sulfonic acid and 2-oxynaphthalene entered.
The reaction mixture is heated to 74 to 78 hours with thorough stirring for 16 hours, then diluted with 300 parts of cold water, neutralized with dilute mineral acid and the new chromium-containing dye separated by adding sodium chloride.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH172607T | 1933-04-21 | ||
CH169699T | 1933-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH172607A true CH172607A (en) | 1934-10-15 |
Family
ID=25718789
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH172607D CH172607A (en) | 1933-04-21 | 1933-04-21 | Process for the preparation of a chromium-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH172607A (en) |
-
1933
- 1933-04-21 CH CH172607D patent/CH172607A/en unknown
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