CH130623A - Process for the preparation of a dye. - Google Patents
Process for the preparation of a dye.Info
- Publication number
- CH130623A CH130623A CH130623DA CH130623A CH 130623 A CH130623 A CH 130623A CH 130623D A CH130623D A CH 130623DA CH 130623 A CH130623 A CH 130623A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- parts
- sulfonic acid
- weight
- Prior art date
Links
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- Coloring (AREA)
Description
Verfahren zur Darstellung eines Farbstoffes. Es wurde gefunden, dass man durch ge meinsame Oxydation von 1.3-Di-(4'methoxy- phenylamino)-naphtalin-8-sulfosäure und 1.4- Phenylendiaminosulfosäure einen auf Wolle und Seide klar aufziehenden Farbstoff erhält,
welcher sich gegenüber den nach den deut schen Patentschriften 78497 und 206646 aus 1 .3-Diphenyl- beziehungsweise 1.3-Ditolyl- amirio-naphtaliri-8-sulfosäure - und 4-Amino- dimethylanilin-3-sulfosäure erhältlichen Farb stoffen durch erheblich bessere Lichtechtheit auszeichnet. Die Oxydation wird zweckmässig in schwach alkalischer, wässerig-alkoholischer Lösung mit Sauerstoff der Luft in Gegen wart von ammoniakalischer Kupferoxyd lösung ausgeführt.
Beispiel: 450 Gewichtsteile 1.3-Di-(4'methoxyphe- nylamino) - naphtalin - 8 - sulfosäure werden in 5000 Gewichtsteilen 50 %igem Alkohol und Soda neutral gelöst, mit einer Lösung von 188 Gewichtsteilen 1. 4-Phenylendiaminmono- sulfosäure in 2000 Gewichtsteilen 50 o/oigem Alkokol und 53 Teilen Soda vereinigt.
Zur Lösung gibt man 50 Gewichtsteile Kupfer- oxydammoniaklösung hinzu, welche ca. 20 Gewichtsteilen Kupfervitriol entsprechen, er wärmt auf 50-60o und leitet bei dieser Temperatur unter Rühren einen Luftstrom durch. Nach einigen Stunden ist die Farb- stoffbildung beendet. Man saugt ab und kri stallisiert nötigenfalls aus heissem Wasser um.
Der Farbstoff ist ein metallisch glänzen des, kristallinisches Pulver, das in Wasser mit violetter Farbe löslich ist und Wolle und Seide-in klaren, violetten, lichtechten Tönen anfärbt.
Process for the preparation of a dye. It has been found that by joint oxidation of 1,3-di- (4'-methoxyphenylamino) -naphthalene-8-sulfonic acid and 1,4-phenylenediamino sulfonic acid, a dye which absorbs clearly on wool and silk is obtained,
which compared to the German patents 78497 and 206646 from 1,3-diphenyl- or 1,3-ditolyl-amirio-naphtaliri-8-sulfonic acid - and 4-amino-dimethylaniline-3-sulfonic acid is characterized by significantly better lightfastness . The oxidation is expediently carried out in a weakly alkaline, aqueous-alcoholic solution with oxygen in the air in the presence of ammoniacal copper oxide solution.
Example: 450 parts by weight of 1,3-di- (4'-methoxyphenylamino) -naphthalene-8-sulfonic acid are dissolved in 5000 parts by weight of 50% alcohol and soda neutrally, with a solution of 188 parts by weight of 1,4-phenylenediamine monosulfonic acid in 2000 parts by weight 50% alcohol and 53 parts of soda combined.
50 parts by weight of copper oxide ammonia solution, which corresponds to approx. 20 parts by weight of copper vitriol, are added to the solution; After a few hours, the formation of the dye has ended. It is suctioned off and, if necessary, crystallized from hot water.
The dye is a metallic, shiny, crystalline powder that is soluble in water with a violet color and dyes wool and silk in clear, violet, lightfast shades.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE130623X | 1925-06-12 | ||
| CH122596T | 1926-06-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH130623A true CH130623A (en) | 1928-12-15 |
Family
ID=25709914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH130623D CH130623A (en) | 1925-06-12 | 1926-06-05 | Process for the preparation of a dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH130623A (en) |
-
1926
- 1926-06-05 CH CH130623D patent/CH130623A/en unknown
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