CH145347A - 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
- CH145347A CH145347A CH145347DA CH145347A CH 145347 A CH145347 A CH 145347A CH 145347D A CH145347D A CH 145347DA CH 145347 A CH145347 A CH 145347A
- Authority
- CH
- Switzerland
- Prior art keywords
- bromine
- vat dye
- containing chlorine
- preparation
- dye containing
- Prior art date
Links
Landscapes
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Chlor und Brom enthaltenden Kiipenfarbstof%s. Im Hauptpatent ist ein Verfahren zur Darstellung eines Chlor und Brom ent haltenden Küpenfarbstoffes beschrieben, bei dem 1 Mol Isodibenzanthron in Gegenwart von Chlorsulfonsäure und von Katalysatoren mit mindestens einem halben Hol eines bro- mierenden Mittels behandelt wird.
Es wurde nun gefunden, dass man einen Farbstoff von ähnlichen Eigenschaften erhalten kann, wenn man 1 Mol Isodi- benzanthron in Gegenwart von Chlorsulfon- säure und Katalysatoren mit mindestens 11/2 Mol eines bromierenden Mittels behandelt.
Der erhaltene Küpenfarbstoff, ein Tri- brominonochlorisodibenzanthron, ist ein vio lettes Pulver, löst sich in konzentrierter Schwefelsäure mit grüner Farbe und liefert auf Baumwolle aus blauer Küpe klare, kräf tige, violette Färbungen von hervorragenden Echtheitseigenschaften.
<I>Beispiel:</I> 46 Teile Isodibenzanthron werden in <B>160</B> Teilen Chlorsulfonsäure gelöst und nach Zugabe von 4 Teilen Schwefel und 35 Teilen Brom unter Rühren langsam auf 60 bis 70 C erwärmt. Wenn die Hauptmenge des angewandten Broms aufgenommen ist, lässt man erkalten und arbeitet in der übliehen Weise auf.
An Stelle von Schwefel kann man auch andere Katalysatoren, zuin Beispiel Jod oder Selen, anwenden.
Process for the preparation of a block dye containing chlorine and bromine. The main patent describes a process for the preparation of a vat dye containing chlorine and bromine, in which 1 mole of isodibenzanthrone is treated in the presence of chlorosulfonic acid and catalysts with at least half a pint of a brominating agent.
It has now been found that a dye with similar properties can be obtained if 1 mole of isodibenzanthrone is treated in the presence of chlorosulfonic acid and catalysts with at least 11/2 moles of a brominating agent.
The vat dye obtained, a tribrominonochlorisodibenzanthrone, is a violet powder, dissolves in concentrated sulfuric acid with a green color and provides clear, strong, violet dyeings with excellent fastness properties on cotton from a blue vat.
<I> Example: </I> 46 parts of isodibenzanthrone are dissolved in <B> 160 </B> parts of chlorosulfonic acid and, after adding 4 parts of sulfur and 35 parts of bromine, slowly heated to 60 to 70 ° C. with stirring. When the main amount of the bromine used has been absorbed, it is left to cool and worked on in the usual way.
Instead of sulfur, it is also possible to use other catalysts, for example iodine or selenium.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE145347X | 1928-03-13 | ||
| CH141548T | 1929-03-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH145347A true CH145347A (en) | 1931-02-15 |
Family
ID=25713867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH145347D CH145347A (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) | CH145347A (en) |
-
1929
- 1929-03-12 CH CH145347D patent/CH145347A/en unknown
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