CH143400A - Process for the preparation of a vat dye. - Google Patents
Process for the preparation of a vat dye.Info
- Publication number
- CH143400A CH143400A CH143400DA CH143400A CH 143400 A CH143400 A CH 143400A CH 143400D A CH143400D A CH 143400DA CH 143400 A CH143400 A CH 143400A
- Authority
- CH
- Switzerland
- Prior art keywords
- anthanthrone
- preparation
- dye
- vat dye
- vat
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Iüipenfarbstoffes. Es wurde gefunden, dass man einen wert vollen Küpenfarbstoff erhalten kann, wenn man Anthanthron mit jodierenden Mitteln behandelt.
Der erhaltene Farbstoff, ein Monojod anthanthron, löst sich in konzentrierterSchwe- felsäure mit grüner Farbe und gibt mit alka lischer Hydrosulfitlösung eine violettrote Küpe, aus der Baumwolle in orangefarbenen Tönen gefärbt wird.
An Stelle von dem isolierten Anthanthron auszugehen, kann man auch die hei der Dar stellung des Anthanthronaus 1 . 1'-Dinaph- tyl-8.8'-dicarbonsäure erhaltene schwefel saure Lösung des Anthanthrons verwenden;
ma.n erspart sich so die Isolierung des An- thanthrons. An Stelle von Jod kann man auch andere jodierende Mittel, zum Beispiel Kaliumjodid, verwenden. <I>Beispiel:</I> 30,6 Teile Anthanthron, dargestellt zum Beispiel durch Behandeln von 1 . 1'-Dina.ph- tyl - 8 . 8' - diearbonsäure mit konzentrierter Schwefelsäure, werden in 300 Teilen Mono hydrat auf 120 C erhitzt, v,@orauf die Lö sung im Laufe einer Stunde mit<B>12,7</B> Teilen Jod versetzt. und unter.
Rühren noch eine Stunde lang auf 120 bis 130 C erhitzt wird. Nach dem Erkalten giesst man auf Eis, saugt ab und trocknet.
Der erhaltene Farbstoff kann durch Um kristallisieren aus hochsiedenden organischen Lösungsmitteln, zum Beispiel \iitrobenzol, oder über das sich aus wasserhaltiger Schwe felsäure ausscheidende Sulfat gereinigt wer den.
Process for the preparation of a jipen dye. It has been found that valuable vat dye can be obtained by treating anthanthrone with iodine agents.
The dye obtained, a monoiodanthanthrone, dissolves in concentrated sulfuric acid with a green color and, with alkaline hydrosulfite solution, gives a violet-red vat from which cotton is dyed in orange tones.
Instead of starting from the isolated anthanthrone, one can also use the hot representation of the anthanthrone from 1. 1'-Dinaphthyl-8.8'-dicarboxylic acid, use the sulfuric acid solution of the anthanthrone obtained;
This saves the isolation of the anthanthrone. Instead of iodine, you can also use other iodising agents, for example potassium iodide. <I> Example: </I> 30.6 parts of anthanthrone, represented for example by treating 1. 1'-Dina.ph- tyl - 8. 8′-dicarboxylic acid with concentrated sulfuric acid are heated to 120 ° C. in 300 parts of monohydrate, and 12.7 parts of iodine are added to the solution over the course of one hour. and under.
Stirring is heated to 120 to 130 C for another hour. After cooling, it is poured onto ice, filtered off with suction and dried.
The dye obtained can be purified by recrystallization from high-boiling organic solvents, for example nitrobenzene, or via the sulphate which separates out from hydrous sulfuric acid.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE143400X | 1928-05-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH143400A true CH143400A (en) | 1930-11-15 |
Family
ID=5669683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH143400D CH143400A (en) | 1928-05-29 | 1929-05-21 | Process for the preparation of a vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH143400A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1288265B (en) * | 1966-07-06 | 1969-01-30 | Mayr Friedrich Wilhelm | shelf |
-
1929
- 1929-05-21 CH CH143400D patent/CH143400A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1288265B (en) * | 1966-07-06 | 1969-01-30 | Mayr Friedrich Wilhelm | shelf |
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