CH183894A - Process for the preparation of a dye. - Google Patents
Process for the preparation of a dye.Info
- Publication number
- CH183894A CH183894A CH183894DA CH183894A CH 183894 A CH183894 A CH 183894A CH 183894D A CH183894D A CH 183894DA CH 183894 A CH183894 A CH 183894A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- amino
- cyano
- anilinoanthraquinone
- soluble
- Prior art date
Links
Landscapes
- Coloring (AREA)
Description
Verfahren zur Herstellung eines Farbstoffes. Das Hauptpatent betrifft ein Verfahren zur Herstellung eines wertvollen Farb stoffes, bei dem 1-Amino-2-cyan-4-(p-tolui- dino)-anthrachinon so lange mit einem sul fonierend wirkenden Mittel behandelt wird, bis .das Reaktionsprodukt eben völlig wasser löslich geworden ist, worauf .die Cyangruppe zur Carbonamidgruppe verseift wird.
Es wurde nun gefunden, dass man einen ähnlich wertvollen Farbstoff erhält, wenn man 1-Amino-2-cyan-4-anilinoanthrachinon so lange mit einem sulfonierend wirkenden Mittel behandelt, bis das Reaktionsprodukt eben völlig wasserlöslich geworden ist, so dann die Cyangruppe zur Carbonamidgruppe verseift.
Der erhaltene Farbstoff, eine Sulfonsäure des 1-Amino-4-anilinoanthrachinon-2-carbon- amides, färbt Wolle aus saurem Bade in klaren rotstickig blauen Tönen. <I>Beispiel:</I> 10 Teile 1- Amino-2-cyan-4-anilinoanthra- cliiDon, erhältlich zum Beispiel aus 1-Amino- 2-cyan-4-bromanthrachinon und Anilin, wer den in 100 Teilen Schwefelsäuremonohydrat gelöst und so lange mit rauchender Schwefel säure, enthaltend 23 % S03, versetzt,
bis eine entnommene und aufgearbeitete Probe erken nen lässt, dass das Reaktionsprodukt eben völlig wasserlöslich geworden ist. Man gibt sodann zu dem Reaktionsgemisch so viel kri stallisierte Borsäure, -dass das Sulfierungs- gemisch etwa 5 % davon enthält, und rührt so lange bei Zimmertemperatur, bis die Cyan- gruppe vollständig in die Carbonamidgruppe übergeführt worden ist.
Darauf giesst man das Reaktionsgemisch in Eiswasser und salzt den entstandenen Farbstoff in der üblichen Weise aus.
Process for the preparation of a dye. The main patent relates to a process for the production of a valuable dye, in which 1-amino-2-cyano-4- (p-toluidino) anthraquinone is treated with a sulphonating agent until the reaction product is completely has become water-soluble, whereupon the cyano group is saponified to form the carbonamide group.
It has now been found that a similarly valuable dye is obtained if 1-amino-2-cyano-4-anilinoanthraquinone is treated with a sulfonating agent until the reaction product has just become completely water-soluble, then the cyano group becomes the carbonamide group saponified.
The dye obtained, a sulfonic acid of 1-amino-4-anilinoanthraquinone-2-carbonamide, dyes wool from an acid bath in clear, red-embroidered blue shades. <I> Example: </I> 10 parts of 1-amino-2-cyano-4-anilinoanthraclydone, obtainable for example from 1-amino-2-cyano-4-bromoanthraquinone and aniline, are dissolved in 100 parts of sulfuric acid monohydrate and so long with fuming sulfuric acid, containing 23% SO3, added,
until a sample taken and processed shows that the reaction product has just become completely water-soluble. Sufficient crystallized boric acid is then added to the reaction mixture so that the sulfonation mixture contains about 5% of it, and the mixture is stirred at room temperature until the cyano group has been completely converted into the carbonamide group.
The reaction mixture is then poured into ice water and the dye formed is salted out in the usual way.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE183894X | 1933-01-21 | ||
CH178227T | 1933-12-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH183894A true CH183894A (en) | 1936-04-30 |
Family
ID=25720101
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH183894D CH183894A (en) | 1933-01-21 | 1933-12-20 | Process for the preparation of a dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH183894A (en) |
-
1933
- 1933-12-20 CH CH183894D patent/CH183894A/en unknown
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