CH131264A - Process for the preparation of a vat dye of the benzanthrone pyrazole anthrone series. - Google Patents
Process for the preparation of a vat dye of the benzanthrone pyrazole anthrone series.Info
- Publication number
- CH131264A CH131264A CH131264DA CH131264A CH 131264 A CH131264 A CH 131264A CH 131264D A CH131264D A CH 131264DA CH 131264 A CH131264 A CH 131264A
- Authority
- CH
- Switzerland
- Prior art keywords
- preparation
- benzanthrone
- green
- dye
- pyrazole anthrone
- Prior art date
Links
Landscapes
- Cosmetics (AREA)
- Coloring (AREA)
Description
Verfahren zur Darstellung eines Itüpeniarbstoffes der Benzanthronpyrazolanthronreilie. Gegenstand der vorliegenden Erfindung ist ein Verfahren zur Darstellung eines hüpenfarbstoffes der Benzanthronpyrazol- a.nthronreihe, welches dadurch gekennzeich net ist, dass Bz-1-Benzanthronyl-Py-l-py ra- zolanthron bei Temperaturen über<B>100'</B> mit einem alkalischen Kondensationsmittel, wie Ätzkali in Gegenwart von Alkohol, behan delt wird.
Die Bildung dieses neuen Farbstoffes er folgt offensichtlich über das Produkt des Hauptpatentes hinweg, vielleicht indem un ter dem Einfluss des Alkalis Hydroxyl- gruppen in das Farbstoffmolekül eingeführt werden.
Der so dargestellte Farbstoff bildet eine sehwa.rze Paste bezw. ein braunstichig schwarzes Pulver, das sich in konzentrierter Schwefelsäure mit olivebrauner Farbe löst. Beim Verdünnen dieser Lösung tritt Crrün- färbung, dann Fällung grüner Flocken ein. :lus der blauen alkalischen Hydrosulfitküpe wird Baumwolle in grüngrauen bis schwärz lichen Tönen angefärbt.
<I>Beispiel:</I> In eine auf 160 angeheizte Schmelze von<B>150</B> Gewichtsteilen Ätzkali und 75 Ge wichtsteilen Alkohol werden unter einer Stickstoffatmosphäre @10 Gewichtsteile Bz l-Benzanthronyl-Py-l-pyrazolanthron einge tragen und 3 Stunden lang bei<B>160'</B> ver rührt. Dann wird in Wasser ausgegossen und durch Einleiten von Luft der Farbstoff in grünlich graublauen Flocken zur vollstän digen Ausscheidung gebracht. Nach dem Filtrieren und Auswaschen erhält man eine schwarze Paste, nach dem Trocknen ein braunstichig schwarzes Pulver.
Mit konzen trierter Schwefelsäure entsteht eine oliv braune Lösung, die sich auf Zusatz von wenig Wasser grün färbt und bei stärkerem Verdünnen grüne Flocken ausscheidet. Al kalisches Hy drosulfit gibt eine blaue Küpe, aus der Baumwolle in grüngrauen bis schwarzen Tönen angefärbt. wird.
Process for the preparation of an Itüpeniarstoffes of the Benzanthronpyrazolanthronreilie. The present invention relates to a process for the preparation of a coat dye of the benzanthrone pyrazole a.nthron series, which is characterized in that Bz-1-benzanthronyl-Py-1-pyrazolanthrone at temperatures above 100 '/ B > is treated with an alkaline condensation agent such as caustic potash in the presence of alcohol.
The formation of this new dye obviously takes place beyond the product of the main patent, perhaps by introducing hydroxyl groups into the dye molecule under the influence of the alkali.
The dyestuff thus represented forms a viscous paste or a brownish black powder that dissolves in concentrated sulfuric acid with an olive-brown color. When this solution is diluted, the color turns green, followed by the precipitation of green flakes. : lus the blue alkaline hydrosulfite vat, cotton is dyed in green-gray to blackish tones.
<I> Example: </I> In a melt, heated to 160, of <B> 150 </B> parts by weight of caustic potash and 75 parts by weight of alcohol, 10 parts by weight of Bz l-benzanthronyl-py-l-pyrazolanthrone are entered under a nitrogen atmosphere and stirred for 3 hours at <B> 160 '</B>. It is then poured into water and, by introducing air, the dye is brought to a complete excretion in greenish-gray-blue flakes. After filtering and washing out, a black paste is obtained; after drying, a brownish black powder.
With concentrated sulfuric acid, an olive-brown solution is formed which turns green when a little water is added and green flakes precipitate when thinned more strongly. Alkaline hydrosulphite gives a blue vat, dyed from the cotton in green-gray to black tones. becomes.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE131264X | 1926-08-30 | ||
CH128473T | 1927-08-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH131264A true CH131264A (en) | 1929-01-31 |
Family
ID=25711119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH131264D CH131264A (en) | 1926-08-30 | 1927-08-29 | Process for the preparation of a vat dye of the benzanthrone pyrazole anthrone series. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH131264A (en) |
-
1927
- 1927-08-29 CH CH131264D patent/CH131264A/en unknown
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