CH264196A - Process for the production of a copper-containing azo dye. - Google Patents
Process for the production of a copper-containing azo dye.Info
- Publication number
- CH264196A CH264196A CH264196DA CH264196A CH 264196 A CH264196 A CH 264196A CH 264196D A CH264196D A CH 264196DA CH 264196 A CH264196 A CH 264196A
- Authority
- CH
- Switzerland
- Prior art keywords
- copper
- production
- containing azo
- dye
- azo 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
- C09B45/24—Disazo or polyazo compounds
- C09B45/28—Disazo or polyazo compounds containing copper
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 260083. Verfahren zur Herstellung eines kupferhaltigen Azofarbatoffes. Es wurde gefunden, dass man einen wert vollen kupferhaltigen Azofarbstoff erhält, wenn man den Disazofarbstoff, der durch Vereinigen von 1 Mol tetrazotiertem 4,4'-Di- amino-3,3'-dimethoxydiphenyl mit 1 Mol 2- Oxynaphthalin-3,6-disulfonsäure und 1 Mol 2-Oxynaphthalin-4-sulfonsäure erhältlich ist,
mit ammoniakalischen Kupferverbindungen erwärmt, bis die Methoxygruppen aufgespal ten sind.
Der neue Farbstoff ist ein dunkles Pulver, das sich in Wasser leicht mit rotstickig blauer Farbe löst und Baumwolle in blauen Tönen von sehr guter Lichtechtheit färbt.
<I>Beispiel:</I> 24,4 Teile 4,4'-Diamino-3,3'-dimethoxydi- phenyl werden in der üblichen Weise tetrazo- tiert. Hierauf wird eine kalte konzentrierte, wässerige Lösung von Natriumcarbonat zuge setzt, bis die Reaktionslösung gegen Brillant gelbpapier schwach alkalisch reagiert. Dann wird sofort eine Lösung des Salzes von 30,4 Teilen 2-Naphthol-3,6-disulfonsäure zugesetzt.
Wenn keine Tetrazoverbindung mehr vorhan den ist, was gewöhnlich nach 5 bis 10 Minuten der Fall ist, wird eine Lösung des Natrium salzes von 23,5 Teilen 2-Naphthol-4-sulfon- säure eingetragen. Der isolierte Farbstoff wird in 5000 Teilen heissem Wasser suspen- diert und mit 75 Teilen einer Ammoniak lösung vom spez. Gewicht 0,88 versetzt, wor auf eine Lösung von 60 Teilen kristallisiertem Kupfersulfat in 200 Teilen Wasser zugesetzt wird. Das Ganze wird bei 800 in einer Rück flussapparatur während 20 bis 22 Stunden gerührt, wobei das Reaktionsgemisch mit Am moniak stark alkalisch gehalten wird.
Die komplexe Kupferverbindung wird durch Zu satz von Natriumchlorid gefällt und hierauf durch Filtrieren abgetrennt und getrocknet.
<B> Additional patent </B> to main patent no. 260083. Process for the production of a copper-containing azo carbate. It has been found that a valuable copper-containing azo dye is obtained if the disazo dye obtained by combining 1 mole of tetrazotized 4,4'-di-amino-3,3'-dimethoxydiphenyl with 1 mole of 2-oxynaphthalene-3,6 -disulfonic acid and 1 mol of 2-oxynaphthalene-4-sulfonic acid is available,
heated with ammoniacal copper compounds until the methoxy groups are split up.
The new dye is a dark powder that dissolves easily in water with a red-embroidered blue color and dyes cotton in blue shades of very good lightfastness.
<I> Example: </I> 24.4 parts of 4,4'-diamino-3,3'-dimethoxydiphenyl are tetrazole in the usual way. A cold concentrated, aqueous solution of sodium carbonate is then added until the reaction solution reacts slightly alkaline against brilliant yellow paper. A solution of the salt of 30.4 parts of 2-naphthol-3,6-disulfonic acid is then immediately added.
When the tetrazo compound is no longer present, which is usually the case after 5 to 10 minutes, a solution of the sodium salt of 23.5 parts of 2-naphthol-4-sulfonic acid is added. The isolated dye is suspended in 5000 parts of hot water and treated with 75 parts of an ammonia solution of spec. Weight 0.88 added, whereupon a solution of 60 parts of crystallized copper sulfate in 200 parts of water is added. The whole is stirred at 800 in a reflux apparatus for 20 to 22 hours, the reaction mixture being kept strongly alkaline with ammonia.
The complex copper compound is precipitated by adding sodium chloride and then separated off by filtration and dried.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB264196X | 1946-02-15 | ||
CH260083T | 1947-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH264196A true CH264196A (en) | 1949-09-30 |
Family
ID=25730283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH264196D CH264196A (en) | 1946-02-15 | 1947-02-13 | Process for the production of a copper-containing azo dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH264196A (en) |
-
1947
- 1947-02-13 CH CH264196D patent/CH264196A/en unknown
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