CH142059A - Process for the preparation of a vat dye. - Google Patents
Process for the preparation of a vat dye.Info
- Publication number
- CH142059A CH142059A CH142059DA CH142059A CH 142059 A CH142059 A CH 142059A CH 142059D A CH142059D A CH 142059DA CH 142059 A CH142059 A CH 142059A
- Authority
- CH
- Switzerland
- Prior art keywords
- blue
- preparation
- mol
- vat dye
- vat
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines 1i üpenfar bstoffes. Im Hauptpatent Nr. 139808 ist ein Ver fahren zur Herstellung eines wertvollen Kü- penfarbstoffes beschrieben, dadurch gekenn zeichnet, dass man 1 Mol. des durch direkte Bromierung von 2.2'-Dibenzanthronyl er haltenen Tetrabrom - 2 . 2' - dibenzanthronyls mit 2 Mol. 1-Aminoanthrachinon erhitzt.
Es wurde nun gefunden, da.ss man eben falls einen ähnlich wertvollen Küpenfarb- stoff erhält, wenn man 1 Mol. des durch di rekte Bromierung von 2 . 2'-Dibenzanthronyl erhaltenen Tetrabrom-2. 2'-dibenzanthronyls mit 2 Mol. 1-Amino-4-methoxyanthrachinon, zweckmässig in Gegenwart von säurebinden den Mitteln und Metallverbindungen, zum Beispiel Kupferverbindungen, erhitzt.
Der neue Farbstoff löst sich in konzen trierter Schwefelsäure mit blauvioletter Farbe und gibt mit Natronlauge und Hydro- sulfit eine blauviolette Küpe, aus der die Faser in sehr echten und schönen, blau schwarzen Tönen gefärbt wird.
<I>Beispiel:</I> 10 Teile Tetrabrom-2. 2'-dibenzanthrony i werden mit 6,4 Teilen 1-Amino-4-methoxy- anthrachinon, 2 Teilen calcinierter Soda und 0,3 Teilen Kupferoxyd in 150 Teilen Nitro benzol so lange gekocht, bis kein unverän dertes Ausgangsmaterial mehr nachzuweisen ist. Man lässt auf zirka 60 bis 80 abkühlen, saugt ab und wäscht wie üblich mit Nitro benzol nach.
Process for the preparation of a 1i üpenfar bstoffes. The main patent no. 139808 describes a process for the production of a valuable vat dye, characterized in that 1 mol of the tetrabromo-2 obtained by direct bromination of 2,2'-dibenzanthronyl is described. 2 '- dibenzanthronyls heated with 2 mol. 1-Aminoanthraquinone.
It has now been found that a similarly valuable vat dye is obtained if 1 mole of the substance obtained by direct bromination of 2. 2'-dibenzanthronyl obtained tetrabromo-2. 2'-dibenzanthronyls with 2 mol. 1-Amino-4-methoxyanthraquinone, expediently heated in the presence of acid-binding agents and metal compounds, for example copper compounds.
The new dye dissolves in concentrated sulfuric acid with a blue-violet color and, with caustic soda and hydrosulfite, gives a blue-violet vat from which the fibers are colored in very real and beautiful blue-black tones.
<I> Example: </I> 10 parts of Tetrabrom-2. 2'-dibenzanthrony i are boiled with 6.4 parts of 1-amino-4-methoxy-anthraquinone, 2 parts of calcined soda and 0.3 parts of copper oxide in 150 parts of nitro benzene until no unchanged starting material can be detected. It is allowed to cool to about 60 to 80, filtered off with suction and washed with nitrobenzene as usual.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE142059X | 1927-08-18 | ||
CH139808T | 1928-06-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH142059A true CH142059A (en) | 1930-08-31 |
Family
ID=25713404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH142059D CH142059A (en) | 1927-08-18 | 1928-06-25 | Process for the preparation of a vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH142059A (en) |
-
1928
- 1928-06-25 CH CH142059D patent/CH142059A/en unknown
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