CH145337A - 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
- CH145337A CH145337A CH145337DA CH145337A CH 145337 A CH145337 A CH 145337A CH 145337D A CH145337D A CH 145337DA CH 145337 A CH145337 A CH 145337A
- Authority
- CH
- Switzerland
- Prior art keywords
- bromine
- preparation
- vat dye
- containing chlorine
- dye containing
- Prior art date
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
Verfahren zur Darstellung eines Chlor und Broin enthaltenden Küpenfarbstofies. 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 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 Selen, eventuell unter Zusatz von Jod, mit mindestens l1/2 Mol eines bromie- renden Mittels behandelt.
Der erhaltene Küpenfarbstoff, ein Tri- bromdichlordibenzanthron, ist ein dunkelvio- lettes Pulver, löst sich in konzentrierter Schwefelsäure mit violetter Farbe und liefert auf Baumwolle aus blauer Küpe klare, kräf- tige, rotviolette Färbungen von hervorragen den Echtheitseigenschaften.
<I>Beispiel 1:</I> Eine Lösung von 46 Teilen Dibenz- anthron in 460 Teilen Chlorsulfonsäure wird nach Zugabe von 4 Teilen Selen bei gewöhn- licher Temperatur mit 35 Teilen Brom ver setzt und so lange unter Rühren auf 65 bis <B>70'</B> C erwärmt, bis die Hauptmenge des Broms aufgenommen ist. Man lässt erkalten und arbeitet in der üblichen Weise auf.
Beispiel <I>2:</I> Man löst bei gewöhnlicher Temper < zL 2, 46 Teile Dibenzanthron in 460 Teilen Chlorsulfonsäure, gibt 4 Teile Jod und 4 Teile Selen zu und lässt unter Rühren 35 Teile Brom zufliessen. Hierauf erhöht man die Temperatur langsam auf<B>70'</B> C. rührt, bis die Hauptmenge des Broms auf genommen ist, lässt erkalten und arbeitet wie üblich auf.
Process for the preparation of a vat dye containing chlorine and broin. 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 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 chlorosulfonic acid and selenium, possibly with the addition of iodine, with at least 11/2 mol of a brominating agent.
The vat dye obtained, a tribromodichlorodibenzanthrone, is a dark violet powder, dissolves in concentrated sulfuric acid with a violet color and provides clear, strong, red-violet colorations with excellent fastness properties on cotton from a blue vat.
<I> Example 1: </I> A solution of 46 parts of dibenzanthrone in 460 parts of chlorosulphonic acid is, after addition of 4 parts of selenium, mixed with 35 parts of bromine at normal temperature and kept at 65 to <B> while stirring Heat> 70 'C until most of the bromine has been absorbed. You let it cool down and work up in the usual way.
Example <I> 2: </I> 2.4 parts of dibenzanthrone are dissolved in 460 parts of chlorosulphonic acid at ordinary temperature, 4 parts of iodine and 4 parts of selenium are added and 35 parts of bromine are allowed to flow in with stirring. The temperature is then slowly increased to <B> 70 '</B> C. Stir until most of the bromine has been absorbed, let it cool down and work up as usual.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE145337X | 1928-03-13 | ||
CH141548T | 1929-03-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH145337A true CH145337A (en) | 1931-02-15 |
Family
ID=25713857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH145337D CH145337A (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) | CH145337A (en) |
-
1929
- 1929-03-12 CH CH145337D patent/CH145337A/en unknown
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