CH266024A - Process for the preparation of a monoazo dye. - Google Patents
Process for the preparation of a monoazo dye.Info
- Publication number
- CH266024A CH266024A CH266024DA CH266024A CH 266024 A CH266024 A CH 266024A CH 266024D A CH266024D A CH 266024DA CH 266024 A CH266024 A CH 266024A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- violet
- acid
- dissolves
- chroming
- 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
Verfahren zur Herstellung eines Monoazofarbatoffes. Es wurde gefunden, dass ein wertvoller Monoazofarbstoff hergestellt werden kann, wenn man diazotierte 4-Chlor-2-amino-l-oxy- benzol-6-sulfonsäure mit. 2-Oxynaphthalin-6- sulfonsäure-o-anisidid vereinigt.
Der neue Farbstoff stellt ein violettschwarz gefärbtes Pulver dar, das sieh in Wasser mit violetter, in verdünnter Natronlauge und in konz. Schwefelsäure mit roter Farbe löst. Der Farbstoff färbt Wolle aus saurem Bade in braunen Tönen, die durch Nachchromieren in ein blaues Violett von sehr guter Licht-, Walk und Pottingechtheit übergeführt -erden. Der Farbstoff eignet sich vorzüglich zum Färben on Volle nach dem Einbadchromierverfah- v <B>N</B> ren,
wobei ebenfalls sehr echte violette Fär bungen erhalten werden.
Die Diazotierung der 4-Chlor-2-amino-l- oxybenzol-6-sulfonsäure kann in üblicher, an sich bekannter Weise vorgenommen werden. Die Kupplung erfolgt vorzugsweise in alkali schem Medium, z. B. so, dass man der Diazo- lösung so viel Alkali zufügt, bis sie auf Kongo papier keine saure Reaktion mehr anzeigt, und sie hierauf mit einer Lösung vereinigt, die aus der Kupplungskomponente in Wasser mit Al- kalihydroxy d hergestellt wurde.
Beispiel: 22,3 Teile 4-Chlor-2-amino-l-oxybenzol-6- sulfonsäure werden in bekannter Weise diazo- tiert und die neutralisierte Diazolösung mit einer Lösung, bestehend aus 34,5 Teilen 2-Oxy- naphthalin=6-sulfonsäure-o-anisidid, <B>1.0</B> Teilen Natriumhydroxyd und 250 Teilen Wasser bei 30 C vereinigt. Nach beendeter Kupplung wird der erhaltene Farbstoff durch Zusatz von Na- triumehlorid vollständig abgeschieden, abfil- triert und getrocknet.
Process for the production of a monoazo carbate. It has been found that a valuable monoazo dye can be produced by using diazotized 4-chloro-2-amino-1-oxybenzene-6-sulfonic acid. 2-oxynaphthalene-6-sulfonic acid-o-anisidide combined.
The new dye is a violet-black colored powder, which can be seen in water with violet, in dilute caustic soda and in conc. Sulfuric acid dissolves with red color. The dye dyes wool from acid baths in brown shades, which are converted into a blue violet with very good light, milled and potting fastness by after-chroming. The dye is ideally suited for coloring on full according to the single-bath chrome plating process, v <B> N </B> ren,
very real violet colorations are also obtained.
The diazotization of 4-chloro-2-amino-l-oxybenzene-6-sulfonic acid can be carried out in a conventional manner known per se. The coupling is preferably carried out in an alkaline medium such. For example, so much alkali is added to the diazo solution until it no longer shows an acidic reaction on Congo paper, and it is then combined with a solution that was prepared from the coupling component in water with alkali metal hydroxide.
Example: 22.3 parts of 4-chloro-2-amino-1-oxybenzene-6-sulfonic acid are diazo- tated in a known manner and the neutralized diazo solution with a solution consisting of 34.5 parts of 2-oxynaphthalene = 6- sulfonic acid-o-anisidide, <B> 1.0 </B> parts of sodium hydroxide and 250 parts of water at 30.degree. After the coupling has ended, the dye obtained is completely separated off by adding sodium chloride, filtered off and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH261363T | 1946-07-15 | ||
CH266024T | 1946-07-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH266024A true CH266024A (en) | 1949-12-31 |
Family
ID=25730435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH266024D CH266024A (en) | 1946-07-15 | 1946-07-15 | Process for the preparation of a monoazo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH266024A (en) |
-
1946
- 1946-07-15 CH CH266024D patent/CH266024A/en unknown
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