CH204521A - Process for the preparation of a thiodiphenylamine derivative. - Google Patents
Process for the preparation of a thiodiphenylamine derivative.Info
- Publication number
- CH204521A CH204521A CH204521DA CH204521A CH 204521 A CH204521 A CH 204521A CH 204521D A CH204521D A CH 204521DA CH 204521 A CH204521 A CH 204521A
- Authority
- CH
- Switzerland
- Prior art keywords
- thiodiphenylamine
- derivative
- preparation
- sulfur
- hydroquinone
- Prior art date
Links
Description
Verfahren zur Herstellung eines Thiodiphenylaminderivates. Es wurde gefunden, dass man in einfacher Weise zum Thiodiphenylaminderivat der Formel
EMI0001.0005
gelangt, wenn man Schwefel auf eine bZi- sohung von Anilin und Hydrochinon im Mol.- Verhältnis 1 : 1 bei höherer Temperatur ein wirken lässt.
Das Produkt stellt ein bei nahe farbloses, leicht ogydables Pulver dar, das sich in ätzaikalischer Natriumhydrosul- fitlösung mit gelber und in konzentrierter Schwefelsäure mit blauer Farbe löst. Es wird zur Herstellung von Schwefelfarbstoffen ver wendet. Zum Beispiel wird es durch Behan deln mit Polysulfid in einen violettbraunen Schwefelfarbstoff übergeführt.
<I>Beispiel:</I> 18,6 Teile Anilin, 22,0 Teile Hydrochi- non, 19,2 Teile Schwefel werden 7 Stunden bei 170 bis <B>180'</B> erhitzt, wobei die anfäng lich dünnflüssige Schmelze unter Entwei- chung von Wasser und Schwefelwasserstoff dicker wird.
Die erkaltete Schmelze wird ge mahlen und das neue Kondensationsprodukt daraus isoliert durch Lösen in 10 bis 20 % iger Schwefelnatriumlösung, Filtrieren der gelben Lösung von etwas unlöslichen Produkten und Ausfällen entweder durch Ausblasen mit Luft oder durch Versetzen mit Ammonchlo- rid oder verdünnter Mineralsäure.
Process for the preparation of a thiodiphenylamine derivative. It has been found that one can easily obtain the thiodiphenylamine derivative of the formula
EMI0001.0005
when sulfur is allowed to act on a combination of aniline and hydroquinone in a molar ratio of 1: 1 at a higher temperature.
The product is a nearly colorless, slightly ogydable powder which dissolves in caustic sodium hydrosulfate solution with yellow and in concentrated sulfuric acid with blue color. It is used in the manufacture of sulfur dyes. For example, treatment with polysulphide converts it into a purple-brown sulfur dye.
<I> Example: </I> 18.6 parts of aniline, 22.0 parts of hydroquinone, 19.2 parts of sulfur are heated for 7 hours at 170 to <B> 180 '</B>, the initially thin The melt thickens with the escape of water and hydrogen sulphide.
The cooled melt is ground and the new condensation product is isolated from it by dissolving it in 10 to 20% sodium sulphide solution, filtering the yellow solution of somewhat insoluble products and precipitating it either by blowing out with air or by adding ammonium chloride or dilute mineral acid.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH204521T | 1938-05-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH204521A true CH204521A (en) | 1939-05-15 |
Family
ID=4444206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH204521D CH204521A (en) | 1938-05-07 | 1938-05-07 | Process for the preparation of a thiodiphenylamine derivative. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH204521A (en) |
-
1938
- 1938-05-07 CH CH204521D patent/CH204521A/en unknown
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