CH220113A - Process for the preparation of a triazole series dye. - Google Patents
Process for the preparation of a triazole series dye.Info
- Publication number
- CH220113A CH220113A CH220113DA CH220113A CH 220113 A CH220113 A CH 220113A CH 220113D A CH220113D A CH 220113DA CH 220113 A CH220113 A CH 220113A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- triazole
- preparation
- treated
- triazole series
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B43/00—Preparation of azo dyes from other azo compounds
- C09B43/06—Preparation of azo dyes from other azo compounds by oxidation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
Description
Verfahren zur Herstellung eines Farbstoffes der Triazolreihe. Es wurde gefunden, dass ein Farbstoff der Triazolreihe hergestellt werden kann, wenn man den Farbstoff der Formel
EMI0001.0006
mit oxydierenden Mitteln bis zur Bildung des Triazols behandelt.
Der erhaltene Farbstoff stellt in trocke nem Zustande ein dunkles Pulver dar, das sich in konzentrierter Schwefelsäure mit vio letter, in Wasser mit grünlicher Farbe löst und Baumwolle aus glaubersalzhaltigem Bade in grünlichen Tönen färbt, die beim Behan deln mit Kupfersalzen in ein licht- und wasch echtes Braun übergehen.
Zur Durchführung des vorliegenden Ver- fahrens können alle oxydierenden Mittel verwendet werden, die die o-Aminoazogrup- pierung zum Triazolring zu oxydieren ver mögen. Vorzugsweise verwendet man eine ammoniakalische Kupfersalzlösung.
Da sich , in diesem Falle Kupferkomplexverbindungen des Farbstoffes bilden, so muss hier das er haltene Produkt in einem weiteren Arbeits gang, der sich an die Oxydation auch unmittel- bar anschliessen kann, entkupfert werden. Dies kann in an sich bekannter Weise, z. B.
mittels Mineralsäuren, wie Salzsäure, oder mittels Schwefelwasserstoff oder Schwefel- wasserstoff abgebenden Mitteln, wie Sulfide, insbesondere lösliche Sulfide, geschehen.
s Beispiel: 24 Teile des Dinatriumsalzes des Farb- stoffes der Formel
EMI0002.0010
s werden bei 9.5 in 1200 Teilen Wasser gelöst und mit einer ammoniakalkalischen Kupfer lösung, bestehend aus 30 Teilen krist. Kupfer sulfat, 120 Teilen Wasser und<B>88</B> Teilen 24 ;
"igerAmmoniaklösung, versetzt. _II.i111 iisst o etw a 3 Stunden bei. 90-95" rühren. Der ausgefallene Farbstoff wird abfiltriert, mit Wasser nachgewaschen und zur L berführiuig in die kupferfreie Verbindung in 400 Teilen Wasser aufgeschlemnit und nach Zugabe von 133 Teilen etwa 30",'"iger @alzsärue 6 Stunden gekocht.
Nach dein Abfiltrieren und Nach waschen wird er in üblicher 'NVeise durch -Umsetzen mit Soda oder Natronlauge in das Natriuinsalz übergeführt.
Process for the preparation of a triazole series dye. It has been found that a triazole series dye can be prepared using the dye of the formula
EMI0001.0006
treated with oxidizing agents until the triazole is formed.
When dry, the dye obtained is a dark powder that dissolves in concentrated sulfuric acid with violet letter, in water with a greenish color and dyes cotton from Glauber's salt bath in greenish tones, which when treated with copper salts in a light and wash pass real brown.
To carry out the present process, it is possible to use all oxidizing agents which are capable of oxidizing the o-aminoazo grouping to form the triazole ring. An ammoniacal copper salt solution is preferably used.
Since, in this case, copper complex compounds of the dye are formed, the product obtained has to be decuppered in a further work step which can also follow the oxidation. This can be done in a manner known per se, e.g. B.
by means of mineral acids, such as hydrochloric acid, or by means of hydrogen sulfide or hydrogen sulfide releasing agents, such as sulfides, in particular soluble sulfides.
s Example: 24 parts of the disodium salt of the dye of the formula
EMI0002.0010
s are dissolved in 1200 parts of water at 9.5 and with an ammoniacal copper solution, consisting of 30 parts of crystalline Copper sulfate, 120 parts of water and 88 parts of 24;
"iger ammonia solution, added. _II.i111 must be stirred for about 3 hours. 90-95". The precipitated dye is filtered off, washed with water and converted into the copper-free compound in 400 parts of water and, after adding 133 parts, boiled for about 30 "" iger @ alzsärue for 6 hours.
After it has been filtered off and washed, it is converted into the sodium salt in the usual way by reacting it with soda or sodium hydroxide solution.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH215941T | 1939-07-29 | ||
CH220113T | 1939-07-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH220113A true CH220113A (en) | 1942-03-15 |
Family
ID=25725787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH220113D CH220113A (en) | 1939-07-29 | 1939-07-29 | Process for the preparation of a triazole series dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH220113A (en) |
-
1939
- 1939-07-29 CH CH220113D patent/CH220113A/en unknown
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