CH86979A - 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
- CH86979A CH86979A CH86979DA CH86979A CH 86979 A CH86979 A CH 86979A CH 86979D A CH86979D A CH 86979DA CH 86979 A CH86979 A CH 86979A
- Authority
- CH
- Switzerland
- Prior art keywords
- chromium
- dye
- acidic dye
- preparation
- sensitive
- 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
- C09B45/01—Complex metal compounds of azo dyes characterised by the method of metallisation
-
- 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 chromhaltigen sauren Farbstoffs. Es wurde gefunden, dass man den metall empfindlichen Azofarbstoff aus diazotiertem 4-Nitro-2-amino-l-oxybenzol und 1 # 8-Amino- naphtol-3#6-disulfosäure durch Behandlung in der Wärme mit.
einfach chromsauren Sal zen, am besten bei Gegenwart eines Reduk tionsmittels und eines alkalibindenden Mittels, zum Beispiel Ammoniumsulfat und Natrium- thiosulfat, in einen chromhaltigen, sauren Farbstoff überführen kann, welcher das Chrom in maskierter Bindung enthält, indem das selbe aus der wässerigen Lösung durch Soda, Natronlauge oder Ammoniak nicht gefällt wird.
Der Farbstoff ist wasserlöslich, säure- beständig, nicht kupferempfindlich und färbt animalische Fasern aus saurem Bad in walk und lichtechten grünen Tönen.
Beispiel 5 Teile des Azofarbstoffes aus diazotiertem 4-Nitro-2-amirio-l-oxybenzol und 1 # 8-Amino- naphtol-3#6-disulfosäui-e und 1,5 Teile Ka- liumehromat werden in 100 Teilen Wasser 8 Stunden gekocht, wobei die ursprünglich violette Farbe der Lösung tiefgrün gewor den ist. Die Chromverbindung wird durch Aus salzen abgeschieden, abfiltriert und getrocknet.
Process for the preparation of an acidic dye containing chromium. It has been found that the metal-sensitive azo dye from diazotized 4-nitro-2-amino-1-oxybenzene and 1 # 8-amino-naphthol-3 # 6-disulfonic acid by treatment in the heat with.
simply chromic acid salts, ideally in the presence of a reducing agent and an alkali binding agent, for example ammonium sulfate and sodium thiosulfate, can be converted into a chromium-containing, acidic dye which contains the chromium in a masked bond by removing the same from the aqueous solution Soda, caustic soda or ammonia are not precipitated.
The dye is water-soluble, acid-resistant, not sensitive to copper and dyes animal fibers from an acid bath in mill and lightfast green shades.
EXAMPLE 5 parts of the azo dye from diazotized 4-nitro-2-aminio-1-oxybenzene and 1 # 8-aminonaphthol-3 # 6-disulfonic acid and 1.5 parts of potassium ehromat are boiled in 100 parts of water for 8 hours , whereby the original purple color of the solution has become deep green. The chromium compound is deposited by salts from, filtered off and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH86979T | 1916-12-23 | ||
CH77248T | 1920-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH86979A true CH86979A (en) | 1920-11-01 |
Family
ID=25702027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH86979D CH86979A (en) | 1916-12-23 | 1916-12-23 | Process for the preparation of an acidic dye containing chromium. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH86979A (en) |
-
1916
- 1916-12-23 CH CH86979D patent/CH86979A/en unknown
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