CH178546A - Process for the preparation of a dye of the triarylmethane series. - Google Patents
Process for the preparation of a dye of the triarylmethane series.Info
- Publication number
- CH178546A CH178546A CH178546DA CH178546A CH 178546 A CH178546 A CH 178546A CH 178546D A CH178546D A CH 178546DA CH 178546 A CH178546 A CH 178546A
- Authority
- CH
- Switzerland
- Prior art keywords
- dye
- preparation
- acid
- triarylmethane series
- series
- Prior art date
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- Coloring (AREA)
Description
Verfahren zur Herstellung eines Farbstoffes der Triarylmethanreihe. Es wurde gefunden, dass man zu einem wertvollen Farbstoff der Triar,ylmethanreihe gelangt, wenn man 1.2-Xylyl-co-cu-disulfo- säure, wie sie durch Behandlung von 1.2- Di-co-chlorinethylbenzol mit Natriumsulfit er hältlich ist, mit Tetraäthyldiamidobenzliydrol zur Leukosäure kondensiert und diese dann zum Farbstoff oxydiert, <I>Beispiel:
</I> 310 gr 1.2-Xylyl-am-m-disulfosäure (dar gestellt aus 1. 2-Di-m-chloruiethy lberizol mit Natriumsulfit) werden mit 326 Teilen Tetra äthyldiarnidobenzhydrol gut gemischt und unter Rühren in 2000 Teile konzentrierte Schwefelsäure eingetragen. Man rührt die Mischung bei 90 , bis eine Probe mit Na triumacetat und Eisessig versetzt, keine Hydrolreaktion mehr zeigt. Die Schmelze wird auf Eiswasser gegossen und die Leuko- säure dann durch Zusatz von Natronlauge gefällt.
Die Leukosäure wird nun auf be- kanntem Wege mit Bleisuperoxyd oder Bi chromat oxydiert. Aus der Parbstofflösung fällt Kochsalz den Farbstoff in golden schil lernden Blättchen aus. Auf Wolle gefärbt, erhält man eine sehr klare, gelbgrüne Fär bung. Der Farbstoff besitzt neben einer für Tripbenylmethanfarbstoffe sehr guter) Licht echtheit ein hervorragendes Egalisierungs- vermögen.
In d.er Carbinolform entspricht der Farb stoff folgender Formel:
EMI0001.0032
Process for the preparation of a dye of the triarylmethane series. It has been found that a valuable dye of the triar, ylmethane series is obtained if 1,2-xylyl-co-cu-disulfonic acid, as obtainable by treating 1,2-di-co-chlorinethylbenzene with sodium sulfite, is added with tetraethyldiamidobenzliydrol condenses to leuco acid and then oxidizes it to the dye, <I> Example:
</I> 310 gr 1.2-xylyl-am-m-disulfonic acid (is made from 1. 2-di-m-chloruiethy lberizol with sodium sulfite) are mixed well with 326 parts of tetra ethyldiarnidobenzhydrol and introduced into 2000 parts of concentrated sulfuric acid with stirring. The mixture is stirred at 90 ° until a sample with sodium acetate and glacial acetic acid no longer shows any hydrolic reaction. The melt is poured onto ice water and the leuco acid is then precipitated by adding sodium hydroxide solution.
The leuco acid is now oxidized in a known way with lead peroxide or bi-chromate. From the paraffin solution, table salt precipitates the color in shimmering golden leaves. Dyed on wool gives a very clear, yellow-green dye. In addition to very good lightfastness for tripbenylmethane dyes, the dye has excellent leveling properties.
In the carbinol form, the dye corresponds to the following formula:
EMI0001.0032
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE178546X | 1933-11-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH178546A true CH178546A (en) | 1935-07-31 |
Family
ID=5706153
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH178546D CH178546A (en) | 1933-11-11 | 1934-10-22 | Process for the preparation of a dye of the triarylmethane series. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH178546A (en) |
-
1934
- 1934-10-22 CH CH178546D patent/CH178546A/en unknown
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