CH172581A - 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
- CH172581A CH172581A CH172581DA CH172581A CH 172581 A CH172581 A CH 172581A CH 172581D A CH172581D A CH 172581DA CH 172581 A CH172581 A CH 172581A
- Authority
- CH
- Switzerland
- Prior art keywords
- oxynaphthalene
- acid
- 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
Zusatzpatent zum Hauptpatent Nr. <B>169695.</B> Verfahren zur Herstellung eines ehromhaltigen Azofarbstoffes. Es wurde gefunden, dass man einen übrom- haltigen Azofarbstoff erhalten kann, wenn man ein Gemisch,
bestehend aus der kom plexen Ohromverbindung des Azofarbstoffes aus diazotierter 1-Aniino-2-oxynaphthalin-4- sulfonsäure und 2-Oxynaphthalin einerseits und dem Azofarbstoffe aus diazotierter 1- Amitio-2-oxynaphthaliii-4-sulfonsäure und 2- Oxyriaphtbalin,
sowie dem Azofarbstoffe aus diazotierter 2-Amino-l-oxy-4-methylbenzol-5- sulfonsäure und 2-Oxynaphthalin anderseits, mit verdünnten Säuren in der Wärme be handelt.
Der ehromhaltige Farbstoff stellt ein violettschwarzes Pulver dar, das sich in Wasser, sowie in 10%iger Sodalösung mit rotstichigblauer Farbe löst. Er färbt Wolle ans organischsaurem-schwefelsaurem Bade in marineblauen Tönen von ausgezeichneten Echtheiten.
<I>Beispiel:</I> <B>27,5</B> Teile des in saurem Medium herge stellten chromhaltigen Farbstoffes aus dem Azofarbstoff aus diazotierter 1-Amino-2-oxy- naphthalin-4-sulfonsäure und 2-Oxyiiaphthalin werden in 400 Teilen Wasser suspendiert und 10,4 Teile desselben, jedoch unebromier- ten Azofarbstoffes in wässeriger Lösung, sowie 4,
8 Teile des Azofarbstoffes aus diazo- tierter 2-Amino-l-oxy-4-methylbenzol-6-sul- fonsäure und 2-Oxynaphtbalin hinzugefügt. Man versetzt mit 1,5 Teilen 85 %iger Amei- sensäure und kocht längere Zeit unter Rüh ren.
Der zum Teil nicht gelöste, neue chrom- haltige Farbstoff wird durch Zugabe von etwa 25 Teilen<B>30</B> '/oiger Natronlauge in Lö sung gebracht. Das Reaktionsgemisch wird hierauf filtriert, mit stark verdünnter Schwe felsäure neutralisiert und der ehromhaltige Farbstoff durch Beigabe von Kochsalz ab geschieden.
Zu demselben chromhaltigen Azofarbstoi gelangt man, wenn man statt Ameisensäure eine andere Säure, wie z. B. Essigsäure, Benzolsulionsäure, Weinsäure, Schwefelsäure, Oxalsäure, Propionsäure, Naphthalitidisulfon- säure oder Milchsäure verwendet,
Additional patent to main patent no. <B> 169695. </B> Process for the production of an azo dye containing Ehrom. It has been found that an azo dye containing flue can be obtained if a mixture
Consisting of the complex azo dyestuff of diazotized 1-aniino-2-oxynaphthalene-4-sulfonic acid and 2-oxynaphthalene on the one hand and the azo dyes of diazotized 1- amitio-2-oxynaphthalene-4-sulfonic acid and 2-oxyriaphthalene,
and the azo dyes from diazotized 2-amino-l-oxy-4-methylbenzene-5-sulfonic acid and 2-oxynaphthalene on the other hand, with dilute acids in the heat.
The Ehrom-containing dye is a purple-black powder that dissolves in water and in 10% soda solution with a reddish-blue color. It dyes wool in the organic acid-sulfuric acid bath in navy blue shades with excellent fastness properties.
<I> Example: </I> <B> 27.5 </B> parts of the chromium-containing dye produced in an acid medium from the azo dye of diazotized 1-amino-2-oxynaphthalene-4-sulfonic acid and 2-oxyiiaphthalene are suspended in 400 parts of water and 10.4 parts of the same, but non-brominated azo dye in aqueous solution, and 4,
8 parts of the azo dye from diazoated 2-amino-1-oxy-4-methylbenzene-6-sulphonic acid and 2-oxynaphthalene were added. 1.5 parts of 85% formic acid are added and the mixture is boiled for a long time with stirring.
The partly undissolved, new chromium-containing dye is brought into solution by adding about 25 parts <B> 30 </B> '/% sodium hydroxide solution. The reaction mixture is then filtered, neutralized with very dilute sulfuric acid and the dyestuff containing Ehrom is separated off by adding sodium chloride.
The same chromium-containing azo dyes are obtained if, instead of formic acid, another acid, such as e.g. B. acetic acid, benzenesulionic acid, tartaric acid, sulfuric acid, oxalic acid, propionic acid, naphthalitidisulfonic acid or lactic acid are used,
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH169695T | 1933-03-31 | ||
CH172581T | 1933-03-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH172581A true CH172581A (en) | 1934-10-15 |
Family
ID=25718762
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH172581D CH172581A (en) | 1933-03-31 | 1933-03-31 | Process for the preparation of a chromium-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH172581A (en) |
-
1933
- 1933-03-31 CH CH172581D patent/CH172581A/en unknown
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