CH172590A - 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
- CH172590A CH172590A CH172590DA CH172590A CH 172590 A CH172590 A CH 172590A CH 172590D A CH172590D A CH 172590DA CH 172590 A CH172590 A CH 172590A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- chromium
- azo dye
- oxynaphthalene
- caustic
- 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. 169696. Verfahren zur Herstellung eines ehronihaltigen Azofarbstoffes. Es wurde gefunden, dass man einen chromhaltigen Azofarbstoff aus dem Azo- farbstoff, der durch Kuppeln von dianotierter 2-Amirio-l-oxynaphthalin-4. 8-disulfonsäure und 2-Oxynaphthalin entsteht, erhalten kann, wenn man diesen Azofarbstoff,
ein Chromie- rungsmittel und eine hydroxylgruppenhaltige organische Verbindung in ätzalkalischeni Medium aufeinander einwirken lässt.
Der erhaltene chromhaltige Farbstoff stellt ein violett-schwarzes Pulver dar, das sich in Wasser leicht mit blauer Farbe und rotem Dichroismus löst. 10 %ige Sodalösung löst den Farbstoff mit rotstichig blauer Farbe, während er in 10 %iger Natronlauge mit violetter Farbe löslich ist.
Der Farbstoff färbt Wolle aus organischsaurein-schwefel- saurein Bade in Marineblautönen von ausge zeichneten Echtheiten.
<I>Beispiel:</I> In eine Kaliumchromitlösung, enthaltend 104 Teile 8 %ige Chromoxydhydratpaste, entsprechend 8,32 Teilen Cr20a, 60 Teilen 90 %igem Ätzkali und 10 Teilen Zucker, werden<B>52</B> Teile des Azofarbstoffes aus dianotierter 2-Amino-l-oxynaphthalin -4 .
8- disulfonsäure und 2-Oxynaphthalin einge tragen, Man verdünnt mit 30 Teilen Wasser, erwärmt unter Rühren 6 Stunden auf 80-900 und weitere 2 Stunden auf 90-1000. Hierauf wird mit 200 Teilen kaltem Wasser ver dünnt, mit stark verdünnter Mineralsäure neutralisiert und im Vakuum zur Trockne verdampft.
Zu demselben Farbstoffe gelangt man, wenn man, statt den Azofarbstoff mit solchen Komplexverbindungen zu behandeln, die durch Einwirkung von hydroxylgruppenhaltigen organischen Verbindungen auf ätzalkalische Chromhydroxydsuspensionen entstehen,Chrom- salze, sowie überschüssige Ätzalkalien zu sammen mit den hydroxylgruppenhaltigen organischen Verbindungen und dem Azo- farbstoffe erwärmt.
Additional patent to main patent no. 169696. Process for the production of an azo dye containing Ehroni. It has been found that a chromium-containing azo dye can be obtained from the azo dye, which is obtained by coupling dianotated 2-amino-1-oxynaphthalene-4. 8-disulfonic acid and 2-oxynaphthalene is formed, can be obtained if this azo dye,
a chromizing agent and an organic compound containing hydroxyl groups can act on one another in a caustic alkaline medium.
The chromium-containing dye obtained is a violet-black powder which easily dissolves in water with a blue color and red dichroism. 10% soda solution dissolves the dye with a reddish blue color, while it is soluble in 10% sodium hydroxide solution with a purple color.
The dye dyes wool from organic acid-sulfuric acid bath in navy blue tones with excellent fastness properties.
<I> Example: </I> In a potassium chromite solution containing 104 parts of 8% chromium oxide hydrate paste, corresponding to 8.32 parts of Cr20a, 60 parts of 90% caustic potash and 10 parts of sugar, <B> 52 </B> parts of the Azo dye from dianotated 2-amino-1-oxynaphthalene -4.
8-disulfonic acid and 2-oxynaphthalene entered, it is diluted with 30 parts of water, heated with stirring for 6 hours to 80-900 and a further 2 hours to 90-1000. Then ver diluted with 200 parts of cold water, neutralized with highly dilute mineral acid and evaporated to dryness in vacuo.
The same dye is obtained if, instead of treating the azo dye with complex compounds that are formed by the action of hydroxyl-containing organic compounds on alkaline chromium hydroxide suspensions, chromium salts and excess caustic alkalis, together with the hydroxyl-containing organic compounds and the azo dyes, are heated .
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH169696T | 1933-04-03 | ||
CH172590T | 1933-04-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH172590A true CH172590A (en) | 1934-10-15 |
Family
ID=25718771
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH172590D CH172590A (en) | 1933-04-03 | 1933-04-03 | Process for the preparation of a chromium-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH172590A (en) |
-
1933
- 1933-04-03 CH CH172590D patent/CH172590A/en unknown
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