CH145340A - Process for the preparation of a vat dye containing chlorine and bromine. - Google Patents
Process for the preparation of a vat dye containing chlorine and bromine.Info
- Publication number
- CH145340A CH145340A CH145340DA CH145340A CH 145340 A CH145340 A CH 145340A CH 145340D A CH145340D A CH 145340DA CH 145340 A CH145340 A CH 145340A
- Authority
- CH
- Switzerland
- Prior art keywords
- bromine
- preparation
- containing chlorine
- dye containing
- vat dye
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Chlor und Brom enthaltenden ltüpenfarbstoffes. Im Hauptpatent. ist ein Verfahren zur Darstellung eines Chlor und Brom ent haltenden Küpenfarbstoffes beschrieben, bei dem 1 Mol Isodibenzanthrön in Gegenwart von Chlorsulfonsäure und von Katalysatoren mit mindestens einem halben Mol eines bro- mierenden Mittels behandelt wird.
Es wurde nun gefunden, dass man einen Farbstoff von ähnlichen Eigenschaften erhalten kann, wenn man 1 Mol Di- benzanthron in Gegenwart von Chlorsulfon- säure und metallischen Katalysatoren mit mindestens 2 Mol eines bromierenden Mit tels behandelt.
Der erhaltene Küpenfärbstoff, ein Tetra- bromdibenzanthron, das etwas Chlor ent hält, ist ein dunkelblaues Pulver, löst sich in konzentrierter Schwefelsäure mit violetter Farbe und liefert auf Baumwolle aus violett blauer Küpe klare, kräftige, marineblaue Färbungen von hervorragenden Echtheits eigenschaften. Beispiel: 46 Teile Dibenzanthron -erden unter Rühren in -f60 Teilen Chlorsulfonsäure ge löst.
Nach Zugabe von 4 Teilen Antimon lässt man 46 Teile Brom zufliessen, erhöht die Temperatur auf 65 bis<B>70'</B> C und rührt so lange, bis die Hauptmenge des ange wandten Broms aufgenommen ist. Darauf lässt man erkalten und arbeitet in der üblichen Weise auf.
Die Reaktion kann auch bei tieferer Tem peratur durchgeführt werden.
An Stelle von Antimon kann man @iuch andere Katalysatoren, zum Beispiel N iekel. Eisen, Molybdän, Quecksilber, Wismut. Ar sen usw., anwenden.
Process for the preparation of an air dye containing chlorine and bromine. In the main patent. describes a process for the preparation of a vat dye containing chlorine and bromine, in which 1 mole of isodibenzanthrene is treated in the presence of chlorosulfonic acid and catalysts with at least half a mole of a brominating agent.
It has now been found that a dye with similar properties can be obtained if 1 mol of dibenzanthrone is treated in the presence of chlorosulphonic acid and metallic catalysts with at least 2 mol of a brominating agent.
The vat dye obtained, a tetrabromodibenzanthrone containing some chlorine, is a dark blue powder, dissolves in concentrated sulfuric acid with a violet color and provides clear, strong, navy blue dyeings with excellent fastness properties on cotton from a violet-blue vat. Example: 46 parts of dibenzanthrone earths dissolved in -f60 parts of chlorosulfonic acid with stirring.
After adding 4 parts of antimony, 46 parts of bromine are allowed to flow in, the temperature is increased to 65 to 70 ° C. and the mixture is stirred until most of the bromine used has been absorbed. Then you let it cool down and work on in the usual way.
The reaction can also be carried out at a lower temperature.
Instead of antimony, other catalysts can also be used, for example nickel. Iron, molybdenum, mercury, bismuth. Arsenic, etc., apply.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE145340X | 1928-03-13 | ||
CH141548T | 1929-03-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH145340A true CH145340A (en) | 1931-02-15 |
Family
ID=25713860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH145340D CH145340A (en) | 1928-03-13 | 1929-03-12 | Process for the preparation of a vat dye containing chlorine and bromine. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH145340A (en) |
-
1929
- 1929-03-12 CH CH145340D patent/CH145340A/en unknown
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