CH147337A - Process for the preparation of an alkaline cotton dye of the stilbene series. - Google Patents

Process for the preparation of an alkaline cotton dye of the stilbene series.

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Publication number
CH147337A
CH147337A CH147337DA CH147337A CH 147337 A CH147337 A CH 147337A CH 147337D A CH147337D A CH 147337DA CH 147337 A CH147337 A CH 147337A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
acid
oxidizing agent
cotton dye
Prior art date
Application number
Other languages
German (de)
Inventor
Sandoz Chemische Fabri Vormals
Original Assignee
Chem Fab Vormals Sandoz
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chem Fab Vormals Sandoz filed Critical Chem Fab Vormals Sandoz
Publication of CH147337A publication Critical patent/CH147337A/en

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Description

  

  Verfahren zur Darstellung eines     alkaliechten        Baumwollfarbstoffes    der     Stilbenreilie.       Es wurde gefunden, dass man zu einem     al-          kaliechten        Baumwollfarbstoff    der     Stilbenreihe     gelangen kann, wenn man das Produkt, das  durch Kondensation von<B>pp-</B>     Dinitrostilben-          o-o'-disulfosäure    mit     Dehydrothiotoluidinsulfo-          säure    gewonnen werden kann, mit einem  Oxydationsmittel, beispielsweise     Hypohalo-          genit,    behandelt.  



  <I>Beispiel:</I>  Die nach Beispiel 2 der deutschen Patent  schrift 113, 514 aus 100 kg     dinitrostilben-          disulfosaurem    Natrium und 70 kg     dehydro-          thiotoluidinsulfosaurem    Natrium durch     12-          stündiges    Kochen mit 1080 Liter 3     0J0        iger     Natronlauge, Neutralisieren und Filtrieren  erhaltene     Farbstoffpaste    wird in eine     Javelle-          lauge,    bereitet durch Einleiten von 50 kg  Chlor in 600 Liter 10     0%ige    Natronlauge unter  gutem Rühren eingetragen, auf<B>500</B> erwärmt,

    bis das Chlor verbraucht ist, mit Salzsäure  neutralisiert, gepresst und getrocknet.  



  Der erhaltene Farbstoff stellt ein rotes  Pulver dar, das sich mit     violettroter    Farbe  in konzentrierter Schwefelsäure auflöst und    Baumwolle in leuchtend     rotstichig    gelben  Tönen anfärbt. Die Färbungen zeichnen sich  im Gegensatz zu denjenigen des Ausgangs  materiales durch gute     Alkaliechtlieit    aus.



  Process for the preparation of an alkaline cotton dye of the stilbene vine. It has been found that an alkaline cotton dye of the stilbene series can be obtained if the product which can be obtained by condensation of dinitrostilbene-o-o'-disulfonic acid with dehydrothiotoluidinsulfonic acid can be obtained , treated with an oxidizing agent such as hypohalogenite.



  <I> Example: </I> The according to example 2 of German patent 113, 514 from 100 kg of dinitrostilbene disulphonic acid and 70 kg of dehydrothiotoluidinsulphonic acid by boiling for 12 hours with 1080 liters of 30% sodium hydroxide solution, neutralizing and filtering The dye paste obtained is introduced into a Java lye, prepared by introducing 50 kg of chlorine into 600 liters of 10 0% sodium hydroxide solution with thorough stirring, heated to <B> 500 </B>,

    until the chlorine is used up, neutralized with hydrochloric acid, pressed and dried.



  The dye obtained is a red powder that dissolves in concentrated sulfuric acid with a violet-red color and dyes cotton in bright red-tinged yellow tones. In contrast to those of the starting material, the colorations are distinguished by their good alkalinity.

Claims (1)

PATENTANSPRUCII Verfahren zur Darstellung eines alkali- echten Stilbenfarbstoffes, dadurch gekenn- zeichnet, dass man das Produkt, das durch Kondensation von pp' - Dinitrosti lben - o - o'- disulfosäure mit Dehydrothiotoluidinsulfosäure gewonnen werden kann, mit einem Oxyda tionsmittel behandelt. PATENT CLAIMS Process for the preparation of an alkali-true stilbene dye, characterized in that the product, which can be obtained by condensation of pp '- dinitrosti lben - o - o'-disulfonic acid with dehydrothiotoluidine sulfonic acid, is treated with an oxidizing agent. Der Farbstoff stellt ein rotes Pulver dar, das sich mit violettroter Farbe in konzen trierter Schwefelsäure auflöst und Baumwolle in leuchtend rotstichig gelben Tönen anfärbt. Die Färbungen zeichnen sich im Gegensatz zu denjenigen des Ausgangsmateriales durch gute Alkaliechtheit aus. UNTERANSPRUCH: Verfahren gemäss Patentanspruch, dadurch gekennzeichnet, dass man ein Hypohalogenit als Oxydationsmittel verwendet. The dye is a red powder that dissolves in a violet-red color in concentrated sulfuric acid and dyes cotton in bright reddish yellow tones. In contrast to those of the starting material, the dyeings are distinguished by good alkali fastness. SUBClaim: Method according to claim, characterized in that a hypohalite is used as the oxidizing agent.
CH147337D 1929-01-17 1930-03-21 Process for the preparation of an alkaline cotton dye of the stilbene series. CH147337A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH125479T 1929-01-17
DE147337X 1929-03-30

Publications (1)

Publication Number Publication Date
CH147337A true CH147337A (en) 1931-05-31

Family

ID=25710498

Family Applications (1)

Application Number Title Priority Date Filing Date
CH147337D CH147337A (en) 1929-01-17 1930-03-21 Process for the preparation of an alkaline cotton dye of the stilbene series.

Country Status (1)

Country Link
CH (1) CH147337A (en)

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