CH86686A - Process for the preparation of an acidic dye containing chromium. - Google Patents
Process for the preparation of an acidic dye containing chromium.Info
- Publication number
- CH86686A CH86686A CH86686DA CH86686A CH 86686 A CH86686 A CH 86686A CH 86686D A CH86686D A CH 86686DA CH 86686 A CH86686 A CH 86686A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- acid
- dye
- preparation
- acidic 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
Description
Verfahren zur Herstellung eines chromhaltigen sauren Farbstoffs. Es wurde gefunden, dass man den metall empfindlichen Azofarbstoff aus diazotierter 4-Nitro-2-amido-l-oxybenzol-6-sulfonsäure und ss-Naphtylamin durch Behandlung mit chrom abgebenden Mitteln in einen chromhaltigen sauren Farbstoff überführen kann, welcher das Chrom in maskierter Bindung enthält, indem dasselbe aus der wässerigen Lösung durch Soda, Natronlauge oder Ammoniak nicht gefällt wird. Der Farbstoff ist wasser löslich, säurebeständig, nicht kupferempfind lich und färbt animalische Fasern aus saurem Bad in flaschengrünen, walk- und lichtechten Tönen.
<I>Beispiel:</I> 5 Teile Azofarbstoffaus diazotierter 4-Nitro- 2-amido-l-oxybenzol-6-sulfonsäure und @-Naph- tylamin werden mit 200 Teilen Wasser, 7,5 Teilen Chromfluorid (mit einem 36,8 % Crr0s entsprechenden Chromgehalt) und 10-20 Teilen Glaspulver oder der entsprechenden Menge eines andern säurebindenden Mittels, wie Natriumacetat,
Ammoniumlaktat und der gleichen, während 24 Stunden unter Rück fluss gekocht. Es scheidet sich die Chrom- verbindung der Farbsäure als schwerlöslicher Niederschlag aus. Derselbe wird abfiltriert, in kalter, verdünnter Natronlauge (enthaltend 1 Teil NaOH) gelöst und mit Essigsäure schwach angesäuert. Aus der intensiv grünen Lösung wird der Farbstoff durch Aussalzen abgeschieden, abfiltriert, gepresst und ge trocknet.
Process for the preparation of an acidic dye containing chromium. It has been found that the metal-sensitive azo dye made from diazotized 4-nitro-2-amido-1-oxybenzene-6-sulfonic acid and β-naphthylamine can be converted into a chromium-containing acidic dye by treatment with chromium-releasing agents, which masked the chromium Binding contains, in that the same is not precipitated from the aqueous solution by soda, caustic soda or ammonia. The dye is water-soluble, acid-resistant, not sensitive to copper and dyes animal fibers from an acid bath in bottle-green, mill-fast and light-fast shades.
<I> Example: </I> 5 parts of azo dye from diazotized 4-nitro-2-amido-1-oxybenzene-6-sulfonic acid and @ -naphthylamine are mixed with 200 parts of water, 7.5 parts of chromium fluoride (with a 36, 8% Crr0s corresponding chromium content) and 10-20 parts glass powder or the corresponding amount of another acid binding agent, such as sodium acetate,
Ammonium lactate and the like, refluxed for 24 hours. The chromium compound of the color acid separates out as a sparingly soluble precipitate. The same is filtered off, dissolved in cold, dilute sodium hydroxide solution (containing 1 part NaOH) and weakly acidified with acetic acid. The dye is deposited from the intensely green solution by salting out, filtered off, pressed and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH86686T | 1917-10-12 | ||
CH80096T | 1917-10-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH86686A true CH86686A (en) | 1920-09-16 |
Family
ID=25702627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH86686D CH86686A (en) | 1917-10-12 | 1917-10-12 | Process for the preparation of an acidic dye containing chromium. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH86686A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE928901C (en) * | 1951-10-04 | 1955-06-13 | Ciba Geigy | Process for the production of azo dyes |
-
1917
- 1917-10-12 CH CH86686D patent/CH86686A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE928901C (en) * | 1951-10-04 | 1955-06-13 | Ciba Geigy | Process for the production of azo dyes |
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