CH136838A - Process for the preparation of a vat dye. - Google Patents
Process for the preparation of a vat dye.Info
- Publication number
- CH136838A CH136838A CH136838DA CH136838A CH 136838 A CH136838 A CH 136838A CH 136838D A CH136838D A CH 136838DA CH 136838 A CH136838 A CH 136838A
- Authority
- CH
- Switzerland
- Prior art keywords
- works
- preparation
- mol
- gray
- sub
- Prior art date
Links
Landscapes
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Küpenfarbstoffes. Im Hauptpatent ist ein Verfahren zur Darstellung eines güpenfarbstoffes beschrie ben, bei dem man Monohalogendibenzanthron mit 1-Aminoanthrachinon umsetzt.
Es wurde nun gefunden, dass man eben falls einen neuen wertvollen güpenfarbstoff erhält, wenn man 1 Mol Trihalogendibenzan- thron, hergestellt durch Halogenieren von Dibenzantbron in saurer Lösung; mit 3 Molen 1-Aminoanthrachinon umsetzt. Hierbei kann man in Gegenwart von Verdünnungsmitteln, Katalysatoren und säurebindenden Mitteln arbeiten.
Der neue Farbstoff löst sich in konzen trierter Schwefelsäure mit violetter Farbe und liefert auf Baumwolle aus graugrüner Küpe graue bis schwarze, hervorragend echte Färbungen, deren vorzügliche Wasch- und Beuchechtheit besonders zu erwähnen ist und die beim Befeuchten mit Wasser die Farbe nicht ändern.
<I>Beispiel</I> Man kocht unter Rühren eine Suspension von 70 Teilen Tribromdibenzanthron, herge stellt durch Bromieren von Dibenzanthron in Ohlorsulfonsäure, 50 Teilen Natriumacetat, 15 Teilen Kupferoxyd und 70 Teilen 1-Amino- anthrachinon in 1000 Teilen Nitrobenzol, bis die Farbstoffbildung beendet ist; dann arbeitet man wie üblich auf.
Process for the preparation of a vat dye. The main patent describes a process for the preparation of a quality dye in which monohalodibenzanthrone is reacted with 1-aminoanthraquinone.
It has now been found that a new valuable high quality dye is also obtained if 1 mol of trihalodibenzanthrone, prepared by halogenating dibenzantbrone in acidic solution; with 3 moles of 1-aminoanthraquinone. You can work in the presence of diluents, catalysts and acid-binding agents.
The new dye dissolves in concentrated sulfuric acid with a violet color and produces gray to black, exceptionally real dyeings on cotton from a gray-green vat, whose excellent wash and touch fastness deserves special mention and which do not change color when moistened with water.
<I> EXAMPLE </I> A suspension of 70 parts of tribromodibenzanthrone, produced by brominating dibenzanthrone in chlorosulfonic acid, 50 parts of sodium acetate, 15 parts of copper oxide and 70 parts of 1-aminoanthraquinone in 1000 parts of nitrobenzene, is boiled with stirring until the Dye formation is complete; then you work on as usual.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE136838X | 1927-06-09 | ||
CH134945T | 1928-06-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH136838A true CH136838A (en) | 1929-11-30 |
Family
ID=25712405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH136838D CH136838A (en) | 1927-06-09 | 1928-06-01 | Process for the preparation of a vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH136838A (en) |
-
1928
- 1928-06-01 CH CH136838D patent/CH136838A/en unknown
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