CH172608A - 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
- CH172608A CH172608A CH172608DA CH172608A CH 172608 A CH172608 A CH 172608A CH 172608D A CH172608D A CH 172608DA CH 172608 A CH172608 A CH 172608A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- sulfonic acid
- azo dye
- brown
- oxynaphthalene
- 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. 169699. Verfahren zur Herstellung eines chromhaltigen Azofarbstoffes. Es wurde gefunden, daB durch Einwir kung chromabgebender Mittel auf ein Ge misch aus dem Azofarbstoff aus dianotierter 4-Nitro-2-amino-l-phenol-6-sulfonsäure und Acetessigsäureanilid mit den Azofarbstoffen aus diazotierter 4-Nitro-2-amino-l-phenol-6- sulfonsäure und 1-Phenyl-3-methyl-5-pyr- azolon,
sowie aus nitrierter 1-Diazo-2-oxy- naphthalin-4-sulfonsäure und 2-Oxynaphtha- lin ein chromhaltiger Azofarbstoff hergestellt werden kann, wenn als chromabgebende Mit tel solche Mengen Alka.lichromitlösungen ver wendet werden, die auf die drei chromier- baren Gruppen der Azofarbstoffe mindestens drei Atome Chrom enthalten.
Der erhaltene chromhaltige Farbstoff stellt ein schwarzes Pulver dar, das sich in Wasser, sowie in 10%iger Sodalösung mit braunschwarzer und in 10 % iger Natronlauge mit rötlich braunschwarzer Farbe löst. Er färbt Wolle aus organischsaurem-schwefel- saurem Bade in vorzüglich echten braunen Tönen.
Beispiel: 57 Teile einer 8 % igen Chromoxydhydrat- paste, entsprechend .t,56 Teilen Cr203, wer den mit 33,6 Teilen Ä.tzkali in üblicher Weise bis zur vollständigen Lösung verrührt.
In diese Lösung werden 5,5 Teile des Azo- farbstoffes aus dianotierter 4-Nitro-2-amino- 1-phenol-6-sulfonsäure und Acetessigsäure- anilid und 5,5 Teile des Azofarbstoffes aus dianotierter 4-Nitro-2-amino-l-phenol-6-sul- fonsä,ure und 1-Phenyl-3-methyl-5-pyrazolon, ferner 11,
5 Teile des Azofarbstoffes aus nitrierter 1-Diazo-2-oxynaphthalin-4-.sulfon- säure und 2-Oxynaphthalin in kleinen Por tionen eingetragen. Man erwärmt unter gutem Rühren 12 Stunden auf 74 bis 78'>, verdünnt dann mit 50 Teilen Wasser und rührt noch weitere 6 Stunden bei derselben Temperatur. Das Reaktionsgemisch wird hierauf mit 1.50 Teilen kaltem Wasser ver dünnt, mit verdünnter Salzsäure neutrali siert und der chromhaltige Farbstoff durch Beigabe von Kochsalz abgeschieden.
Additional patent to the main patent No. 169699. Process for the production of a chromium-containing azo dye. It has been found that the action of chromium-donating agents on a mixture of the azo dye from dianotized 4-nitro-2-amino-1-phenol-6-sulfonic acid and acetoacetic anilide with the azo dyes from diazotized 4-nitro-2-amino-1 -phenol-6-sulfonic acid and 1-phenyl-3-methyl-5-pyr-azolone,
and an azo dye containing chromium can be produced from nitrated 1-diazo-2-oxynaphthalene-4-sulfonic acid and 2-oxynaphthalene if such amounts of alkali chromite solutions are used as the chromium-releasing agent that correspond to the three chromable ones Groups of azo dyes contain at least three atoms of chromium.
The chromium-containing dye obtained is a black powder which dissolves in water and in 10% strength sodium carbonate solution with brown-black color and in 10% strength sodium hydroxide solution with a reddish brown-black color. He dyes wool from organic acid-sulfuric acid bath in excellent, genuine brown tones.
Example: 57 parts of an 8% chromium oxide hydrate paste, corresponding to .t, 56 parts of Cr203, which are mixed with 33.6 parts of caustic potash in the usual way until completely dissolved.
5.5 parts of the azo dye from dianotized 4-nitro-2-amino-1-phenol-6-sulfonic acid and acetoacetic anilide and 5.5 parts of the azo dye from dianotized 4-nitro-2-amino- l-phenol-6-sulphonic acid and 1-phenyl-3-methyl-5-pyrazolone, also 11,
5 parts of the azo dye from nitrated 1-diazo-2-oxynaphthalene-4-sulfonic acid and 2-oxynaphthalene entered in small portions. The mixture is heated to 74 to 78 ° for 12 hours with thorough stirring, then diluted with 50 parts of water and stirred for a further 6 hours at the same temperature. The reaction mixture is then diluted ver with 1.50 parts of cold water, neutralized with dilute hydrochloric acid and the chromium-containing dye deposited by adding common salt.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH169699T | 1933-04-21 | ||
CH172608T | 1933-04-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH172608A true CH172608A (en) | 1934-10-15 |
Family
ID=25718790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH172608D CH172608A (en) | 1933-04-21 | 1933-04-21 | Process for the preparation of a chromium-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH172608A (en) |
-
1933
- 1933-04-21 CH CH172608D patent/CH172608A/en unknown
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