CH129481A - Process for the production of a new azo dye. - Google Patents
Process for the production of a new azo dye.Info
- Publication number
- CH129481A CH129481A CH129481TA CH129481A CH 129481 A CH129481 A CH 129481A CH 129481T A CH129481T A CH 129481TA CH 129481 A CH129481 A CH 129481A
- Authority
- CH
- Switzerland
- Prior art keywords
- red
- azo dye
- new
- production
- dye
- 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 neuen Azofarbstoffes. Es wurde gefunden, dass man einen neuen Azofarbstoff erhält, wenn man das 3-Methyl- 5-pyrazolon mit dianotierter 1-Amino-2-naph- thol-4-sulfosäure kuppelt und das erhaltene Produkt mit Fluorchrom und hierauf mit verdünnten Alkalien behandelt. Der neue Farbstoff stellt ein rotes Pulver dar, welches sich in Wasser mit roter, in 10%iger Natron lauge mit roter und in konzentrierter Schwe felsäure mit oranger. Farbe löst. Er färbt Wolle aus saurem Bade in blauroten Tönen von vorzüglicher Lichtechtheit.
<I>Beispiel:</I> In eine Mischung aus 10 Teilen 3-lvIethyl- 5-pyrazolon, 4 Teilen Natriumhydroxyd, 30 Teilen Soda und 100 Teilen Wasser trägt man bei 50 25 Teile der dianotierten 1-Amino- 2-naphthol-4-sulfosäure ein. Man rührt bis die Diazoverbindung verschwunden ist, salzt aus und filtriert.
36,9 Teile des so erhaltenen Farbstoffes werden nun in 1100 Teilen Wasser kochend gelöst, mit 22,8 Teilen Chromoxyd in Form einer wässerigen Fluorchromlösucig versetzt und unter Zusatz von Glaspulver längere Zeit rückfliessend gekocht.
Die neue Chromverbindung scheidet sich hierbei in fein kristallinischer, wasserunlös licher Form aus. Dieselbe wird abfiltriert, mit Wasser gewaschen, hierauf in 500 Teilen einer lauwarmen 1,2 o/oigen Natriumhydro- xydlösung gelöst. Aus dieser Lösung gewinnt man den nunmehr löslichen Farbstoff durch schwaches Ansäuern mit Essigsäure und Aussahen. Dieser stellt getrocknet ein blau rotes Pulver dar, löst sich in Wasser mit roter, in 10o/oiger Natronlauge mit roter, in konzentrierter Schwefelsäure mit oranger Farbe und färbt Wolle, vorzugsweise aus schwefelsaurem Färbebade, in blauroten Tönen von vorzüglichen Echtheitseigenschaften an.
Process for the production of a new azo dye. It has been found that a new azo dye is obtained if the 3-methyl-5-pyrazolone is coupled with dianotated 1-amino-2-naphthol-4-sulfonic acid and the product obtained is treated with fluorochrome and then with dilute alkalis. The new dye is a red powder, which is dissolved in water with red, in 10% sodium hydroxide with red and in concentrated sulfuric acid with orange. Color dissolves. It dyes wool from an acid bath in blue-red shades of excellent lightfastness.
<I> Example: </I> In a mixture of 10 parts of 3-ivethyl-5-pyrazolone, 4 parts of sodium hydroxide, 30 parts of soda and 100 parts of water, 50 25 parts of the dianotated 1-amino-2-naphthol 4-sulfonic acid. The mixture is stirred until the diazo compound has disappeared, salted out and filtered.
36.9 parts of the dye thus obtained are then dissolved in 1100 parts of boiling water, 22.8 parts of chromium oxide in the form of an aqueous fluorochrome solution are added and the mixture is refluxed for a long time with the addition of glass powder.
The new chromium compound is deposited in a finely crystalline, water-insoluble form. The same is filtered off, washed with water, then dissolved in 500 parts of a lukewarm 1.2% sodium hydroxide solution. The dye, which is now soluble, is obtained from this solution by weakly acidifying with acetic acid and looking. When dried, this is a blue-red powder, dissolves in water with red, in 10% sodium hydroxide solution with red, in concentrated sulfuric acid with orange color and dyes wool, preferably from sulfuric acid dyebath, in blue-red shades with excellent fastness properties.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH129481T CH129481A (en) | 1926-12-24 | 1926-12-24 | Process for the production of a new azo dye. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH129481T CH129481A (en) | 1926-12-24 | 1926-12-24 | Process for the production of a new azo dye. |
CH127260T | 1926-12-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH129481A true CH129481A (en) | 1928-12-17 |
Family
ID=25710824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH129481T CH129481A (en) | 1926-12-24 | 1926-12-24 | Process for the production of a new azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH129481A (en) |
-
1926
- 1926-12-24 CH CH129481T patent/CH129481A/en unknown
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