CH127783A - Process for the preparation of a new vat dye. - Google Patents
Process for the preparation of a new vat dye.Info
- Publication number
- CH127783A CH127783A CH127783DA CH127783A CH 127783 A CH127783 A CH 127783A CH 127783D A CH127783D A CH 127783DA CH 127783 A CH127783 A CH 127783A
- Authority
- CH
- Switzerland
- Prior art keywords
- vat
- caustic
- dye
- agent
- preparation
- 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
- C09B3/00—Dyes with an anthracene nucleus condensed with one or more carbocyclic rings
- C09B3/22—Dibenzanthrones; Isodibenzanthrones
- C09B3/24—Preparation by synthesis of the nucleus
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Description
Verfahren zur Darstellung eines neuen güpenfarlostoffes. Es wurde gefunden, dass das aus 2- Phenylbenzanthron und Aluminiumchlorid erhältliche Kondensationsprodukt sich in einen wertvollen Küpenfarbstoff überführen lässt, wenn man es mit einem ätzalkalisch wirkenden Mittel, zum Beispiel Ätzalkalien oder Natriumamid, Anilinkalium usw., ver schmilzt. Das ätzalkalisch wirkende Mittel bleibt hierbei unverändert.
Der Farbstoff ist in der .Schmelze in seiner Leukoform vor handen, die sich beim Kochen mit Wasser an der Luft oxydiert. Der so aus dem aus 2-Phenylbenzanthron und Aluminiumchlorid erhältlichen Kondensationsprodukt zum Bei spiel durch Alkalischmelze erhaltene Farb stoff färbt Baumwolle aus der blauen Küpe in klarer, blaugrüner Nuance mit ausgezeich neten Echtheitseigenschaften an. In Schwe felsäure löst sich der Körper mit violett roter Farbe; der neue Farbstoff soll ausser als Küpenfarbstoff auch als Zwischen produkt für die Herstellung von andern Kü- penfarbstoffen dienen.
<I>Beispiel:</I> In eine Suspension von 1 Gewichtsteil des aus 2-Phenylbenzanthron und Alumi- niumchlorid erhältlichen Kondensationspro duktes in 20 Gewichtsteilen Alkohol wer den 5 Gewichtsteile Kaliumhydroxyd ein getragen und das Gemenge auf 150 erhitzt, wobei der überschüssige Alkohol abdestilliert. Die Schmelze färbt sich bald dunkel und nach etwa anderthalb Stunden ist die Re aktion beendet. Es wird mit Wasser ver dünnt, aufgekocht und filtriert. Der Farb stoff wird auf diese Weise in grünen Flocken erhalten.
Process for the preparation of a new quality dye. It has been found that the condensation product obtained from 2-phenylbenzanthrone and aluminum chloride can be converted into a valuable vat dye if it is melted with an alkaline-caustic agent, for example caustic alkalis or sodium amide, aniline potassium, etc. The caustic alkaline agent remains unchanged.
The dye is present in its leuco form in the melt, which is oxidized in the air when it is boiled with water. The dye obtained from the condensation product obtained from 2-phenylbenzanthrone and aluminum chloride, for example by alkali melt, dyes cotton from the blue vat in a clear, blue-green shade with excellent fastness properties. In sulfuric acid the body dissolves with a purple-red color; In addition to being used as a vat dye, the new dye is also intended to serve as an intermediate for the production of other vat dyes.
<I> Example: </I> In a suspension of 1 part by weight of the condensation product obtainable from 2-phenylbenzanthrone and aluminum chloride in 20 parts by weight of alcohol, 5 parts by weight of potassium hydroxide are introduced and the mixture is heated to 150, the excess alcohol being distilled off . The melt soon turns dark and the reaction is over after about an hour and a half. It is diluted with water, boiled and filtered. The dye is obtained in this way in green flakes.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH127783T | 1927-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH127783A true CH127783A (en) | 1928-09-17 |
Family
ID=4386300
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH127783D CH127783A (en) | 1927-02-28 | 1927-02-28 | Process for the preparation of a new vat dye. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH127783A (en) |
-
1927
- 1927-02-28 CH CH127783D patent/CH127783A/en unknown
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