CH153830A - Process for the preparation of a vat dye. - Google Patents
Process for the preparation of a vat dye.Info
- Publication number
- CH153830A CH153830A CH153830DA CH153830A CH 153830 A CH153830 A CH 153830A CH 153830D A CH153830D A CH 153830DA CH 153830 A CH153830 A CH 153830A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- vat
- excellent fastness
- vat dye
- dye
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Küpenfarbstoffes. Es wurde gefunden, dass man einen wert vollen Küpenfarbstoff erhalten kann, wenn man 1 Mol eines Dihalogenbenzanthronpyr- azolanthrons,
wie es erhalten werden kann durch Behandeln von 1 Mal Benzanthronpyr- azolanthron mit mindestens 1 Mol eines Ila- logenierungsmittels in Gegenwart eines sau ren anorganischen Verdünnungsmittels und Überträgern, mit 2 Mol 1-Aminoanthrachi- non bei erhöhter Temperatur umsetzt.
Die Umsetzung wird zweckmässig in hochsiedenden Verdünnungsmitteln in Gegen wart von säurebindenden Mitteln und- von Katalysatoren durchgeführt.
Der neue Farbstoff löst sich in konzen trierter Schwefelsäure mit grüner Farbe und liefert auf Baumwolle aus dunkelgrüner Küpe kräftige graue bis schwarze Färbungen von ausgezeichneter Echtheit, insbesondere von vorzüglicher Laugenkochechtheit. <I>Beispiel:</I> 62 Teile des nach dem Schweiz.
Patent Nr. 152142 erhältlichen Dibrombenzanthron- pyrazolanthrons werden in 1000 Teilen Naph- talin nach Zugabe von 46 Teilen 1-Amino- anthrachinon, 50 Teilen Natriumacetat und 12 Teilen Kupferoxyd so lange unter Rüh ren gekocht, bis eine entnommene Probe praktisch bromfrei ist. Dann lässt man ab kühlen, verdünnt mit einem tiefschmelzenden Verdünnungsmittel, zum Beispiel mit 1000 Teilen Monochlorbenzol, und saugt das Re aktionsprodukt ab.
Man kann auch das Sus- pensionsmittel abdestillieren, gegebenenfalls unter vermindertem Druck, oder mit Wasser dampf, oder mit Wasserdampf und unter ver mindertem Druck.
Process for the preparation of a vat dye. It has been found that a valuable vat dye can be obtained if 1 mole of a dihalobenzanthrone pyrazolanthrone,
as can be obtained by treating once benzanthrone pyrazolanthrone with at least 1 mole of an ilogenating agent in the presence of an acidic inorganic diluent and carriers, with 2 moles of 1-aminoanthraquinone at elevated temperature.
The reaction is expediently carried out in high-boiling diluents in the presence of acid-binding agents and catalysts.
The new dye dissolves in concentrated sulfuric acid with a green color and provides strong gray to black dyeings of excellent fastness, especially excellent fastness to lye boiling, on cotton from a dark green vat. <I> Example: </I> 62 parts of to Switzerland.
Patent No. 152142 available dibromobenzanthrone pyrazolanthrons are boiled with stirring in 1000 parts of naphthalene after adding 46 parts of 1-aminoanthraquinone, 50 parts of sodium acetate and 12 parts of copper oxide until a sample taken is practically bromine-free. Then it is allowed to cool, diluted with a low-melting diluent, for example with 1000 parts of monochlorobenzene, and the reaction product is filtered off with suction.
The suspending agent can also be distilled off, if appropriate under reduced pressure, or with steam, or with steam and under reduced pressure.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE153830X | 1929-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH153830A true CH153830A (en) | 1932-04-15 |
Family
ID=5676001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH153830D CH153830A (en) | 1929-08-14 | 1930-08-08 | Process for the preparation of a vat dye. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH153830A (en) |
-
1930
- 1930-08-08 CH CH153830D patent/CH153830A/en unknown
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