CH86694A - 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
- CH86694A CH86694A CH86694DA CH86694A CH 86694 A CH86694 A CH 86694A CH 86694D A CH86694D A CH 86694DA CH 86694 A CH86694 A CH 86694A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- dye
- acid
- preparation
- sulfonic acid
- 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)
- Chemical Treatment Of Metals (AREA)
Description
Verfahren zur Herstellung eines chromhaltigen sauren Farbstoffs. Es wurde gefunden, dass man den metall empfindlichen Azofarbstoff aus diazotierter 6-Nitro-2-amido-l-oxybenzol-4-sulfosäure und der N-Methylensulfosäure des ss-Naplitylainins durch Behandlung mit chromabgebenden Mit teln in einen chromhaltigen sauren Farbstoff überführen kann,. welcher das Chrom in mas kierter Bindung enthält, indem dasselbe aus der wässerigen Lösung durch Soda, Natron lauge oder Ammoniak nicht gefällt wird.
Der Farbstoff ist wasserlöslich; säurebeständig, nicht kupferempfindlich und färbt animalische Fasern aus saurem Bad in grünen, walk- und lichtechten Tönen.
<I>Beispiel:</I> 5 Teile Azofarbstoff aus diazotierter 6-Nitro-2-amido-l-oxybenzol-4-sulfosäure und der N-Methylensulfosäure des ss-Naplitylamins werden mit 200 Teilen Wasser, 7,5 Teilen Chromfluorid (mit einem 36,8 % CI-203 ent- sprechenden Chromgehalt) und 10-20 Teilen Glaspulver oder der entsprechenden Menge eines andern säurebindenden Mittels,
wie Natriumacetat, Aminoniumlaktat und der gleichen, während 24 Stunden unter Rückfluss gekocht. Es scheidet sich die Chromverbin dung der Farbsäure als schwerlüslicber Nie derschlag 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 ab geschieden, abfiltriert, gepresst und getrocknet.
Process for the preparation of a chromium-containing acidic dye. It has been found that the metal-sensitive azo dye from diazotized 6-nitro-2-amido-1-oxybenzene-4-sulfonic acid and the N-methylene sulfonic acid of ß-naplitylainin can be converted into a chromium-containing acid dye by treatment with chromium-releasing agents, . which contains the chromium in a masked bond, as it is not precipitated from the aqueous solution by soda, caustic soda or ammonia.
The dye is soluble in water; acid-resistant, not sensitive to copper and dyes animal fibers from an acid bath in green, mill-fast and lightfast shades.
<I> Example: </I> 5 parts of azo dye from diazotized 6-nitro-2-amido-1-oxybenzene-4-sulfonic acid and the N-methylene sulfonic acid of ß-naplitylamine are mixed with 200 parts of water, 7.5 parts of chromium fluoride ( with a chromium content of 36.8% CI-203) and 10-20 parts of 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 precipitates out as a difficult-to-dissolve 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 separated 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 |
---|---|---|---|
CH86694T | 1917-10-12 | ||
CH80096T | 1917-10-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH86694A true CH86694A (en) | 1920-09-16 |
Family
ID=25702635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH86694D CH86694A (en) | 1917-10-12 | 1917-10-12 | Process for the preparation of an acidic dye containing chromium. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH86694A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1006988B (en) * | 1954-03-05 | 1957-04-25 | Geigy Ag J R | Process for the production of chromium-containing azo dyes |
-
1917
- 1917-10-12 CH CH86694D patent/CH86694A/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1006988B (en) * | 1954-03-05 | 1957-04-25 | Geigy Ag J R | Process for the production of chromium-containing azo dyes |
DE1006988C2 (en) * | 1954-03-05 | 1957-10-03 | Geigy Ag J R | Process for the production of chromium-containing azo dyes |
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