CH86690A - 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
- CH86690A CH86690A CH86690DA CH86690A CH 86690 A CH86690 A CH 86690A CH 86690D A CH86690D A CH 86690DA CH 86690 A CH86690 A CH 86690A
- 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 diazotiertem 5-Nitro-4-chlor-2-amido-l-oxyberrzol und der N-Methylensiilfosäure der 2-Aminonapthalin- 6-sulfosäure 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 blaugrünen, walk- und lichtechten Tönen.
<I>Beispiel:</I> 5 Teile Azofarbstoff aus diazotiertem 5- Nitro-4-chlor= 2-amido-l-oxybenzol und der N-Methylensulfosäure der 2-Aniirionaplitalin- 6-sulfosäure werden mit 200 Teilen Wasser, 7,5 Teilen Chromfluorid (mit einem 36,8 '0 Crs0s entsprechenden Chromgehalt) und 10-20 Teilen Glaspulver oder der entspre chenden Menge eines andern säurebindenden Mittels, wie Natriumacetat, Aminoniumlaktat und dergleichen,
während 24 Stunden unter Ilückfluss 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 Aussahen ab geschieden, abfiltriert, geprellt und getrocknet.
Process for the preparation of an acidic dye containing chromium. It has been found that the metal-sensitive azo dye made from diazotized 5-nitro-4-chloro-2-amido-1-oxyberrzol and the N-methylensilfonic acid of 2-aminonaphthalene-6-sulfonic acid can be converted into a chromium-containing, can transfer acidic dye, which contains the chromium in masked bond, 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 blue-green, mill-fast and lightfast shades.
<I> Example: </I> 5 parts of azo dye from diazotized 5-nitro-4-chloro = 2-amido-1-oxybenzene and the N-methylene sulfonic acid of 2-anionaplitalin 6-sulfonic acid are mixed with 200 parts of water, 7, 5 parts of chromium fluoride (with a chromium content corresponding to 36.8 '0 Crs0s) 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 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 separated from the intensely green solution by looking, filtered off, peeled off and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH86690T | 1917-10-12 | ||
CH80096T | 1917-10-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH86690A true CH86690A (en) | 1920-09-16 |
Family
ID=25702631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH86690D CH86690A (en) | 1917-10-12 | 1917-10-12 | Process for the preparation of an acidic dye containing chromium. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH86690A (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 CH86690D patent/CH86690A/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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