CH177832A - Process for the production of a copper-containing dye. - Google Patents
Process for the production of a copper-containing dye.Info
- Publication number
- CH177832A CH177832A CH177832DA CH177832A CH 177832 A CH177832 A CH 177832A CH 177832D A CH177832D A CH 177832DA CH 177832 A CH177832 A CH 177832A
- Authority
- CH
- Switzerland
- Prior art keywords
- copper
- dye
- containing dye
- production
- parts
- Prior art date
Links
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- Coloring (AREA)
Description
Verfahren zur Herstellung eines kupferhaltigen Farbstoffes. Gemäss dem im Hauptpatent beschriebe nen Verfahren erhält man einen kupferhal tigen Farbstoff, wenn man den Farbstoff aus dianotierter 4-Aininoazobensol-4'-sulfosäure und 1-Methyl-4-amino-2-oxybenzol mit diano tierter 4'-Nitro-4-aminodiphenylamin-2'-stilfo- s*Ltire weiter kuppelt und das so erhaltene rodukt mit Verbindungen des zweiwertigen Kupfers behandelt.
Wie nun weiter gefunden wurde, erhält man einen ähnlichen Farbstoff, wenn man 2 Mol 4'-Nitro-4-aminodiphenylamin-2'-sulfo- säure dianotiert, die Diazoverbindung mit 1 blol 1#3-Dioxybenzol kuppelt und den so erhaltenen Farbstoff mit Verbindungen des zweiwertigen Kupfers behandelt.
<I>Beispiel:</I> 61,8 Teile 4'-Nitro-4-amonodiphenylamin- 2'-sulfosäure werden in der üblichen Weise dianotiert. Diese Diazoverbindung läuft gleich zeitig mit 12 Teilen Natriumhydroxyd, ge- löst in 60 Teilen Wasser, bei 5 in eine Lösung von 11 Teilen 7.#3-Dioxybenzol und 8 Teilen Natriumhydroxyd in 1000 Teilen Wasser. Nach Beendigung der Kupplung wird die Farbstofflösung auf<B>500</B> erwärmt und mit einer Kupferoxydaminoniaklösung aus 50 Teilen Kupfersulfat versetzt. Die Lösung wird zum Sieden erhitzt und eine halbe Stunde bei dieser Temperatur gehalten.
Durch Filtration wird überschüssiges Kupfer oxyd entfernt; der kupferhaltige Farbstoff färbt Chromleder und vegetabilisch gegerbtes Leder rotbraun.
Man hat bereits Azofarbstoffe aus Nitro- amiciodiphenylaminosulfosäure und Resorcin durch Luftoxydation bei Gegenwart von Ammoniak und Kupfer in Lederfarbstoffe umgewandelt. Die Farbstoffe des beanspruch ten Verfahrens sind aber mit diesen nicht identisch und zeichnen sich vor ihnen, ausser durch eine bessere Ausbeute-Erzielung bei der Herstellung, durch eine wertvollere Nu- ance, sowie bessere Lichtechtheit der mit ihnen erzielten Färbungen aus.
Process for the production of a copper-containing dye. According to the process described in the main patent, a kupferhal term dye is obtained if the dye is made from dianotated 4-aminoazobensol-4'-sulfonic acid and 1-methyl-4-amino-2-oxybenzene with diano-tated 4'-nitro-4- aminodiphenylamine-2'-stilfos * Ltire and the product thus obtained is treated with compounds of divalent copper.
As has now also been found, a similar dye is obtained if 2 moles of 4'-nitro-4-aminodiphenylamine-2'-sulfonic acid are dianotated, the diazo compound is coupled with 1 bol of 1 # 3-dioxybenzene and the dye thus obtained is also Treated compounds of divalent copper.
<I> Example: </I> 61.8 parts of 4'-nitro-4-amonodiphenylamine-2'-sulfonic acid are dianotized in the usual way. This diazo compound runs simultaneously with 12 parts of sodium hydroxide, dissolved in 60 parts of water, at 5 in a solution of 11 parts of 7. # 3-dioxybenzene and 8 parts of sodium hydroxide in 1000 parts of water. After the coupling has ended, the dye solution is heated to 500 and a copper oxydaminonia solution made from 50 parts of copper sulfate is added. The solution is heated to the boil and kept at this temperature for half an hour.
Excess copper oxide is removed by filtration; the copper-containing dye turns chrome leather and vegetable-tanned leather red-brown.
Azo dyes made from nitroamiciodiphenylaminosulphonic acid and resorcinol have already been converted into leather dyes by air oxidation in the presence of ammonia and copper. However, the dyes of the claimed process are not identical to these and are distinguished from them, except by a better yield in production, by a more valuable shade and better lightfastness of the dyeings obtained with them.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE177832X | 1933-05-03 | ||
CH174651T | 1934-12-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH177832A true CH177832A (en) | 1935-06-15 |
Family
ID=25719547
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH177832D CH177832A (en) | 1933-05-03 | 1934-03-20 | Process for the production of a copper-containing dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH177832A (en) |
-
1934
- 1934-03-20 CH CH177832D patent/CH177832A/en unknown
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