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CH144496A - Process for preparing a coloring reaction product obtained from a monoazo dye. - Google Patents

Process for preparing a coloring reaction product obtained from a monoazo dye.

Info

Publication number
CH144496A
CH144496A CH144496DA CH144496A CH 144496 A CH144496 A CH 144496A CH 144496D A CH144496D A CH 144496DA CH 144496 A CH144496 A CH 144496A
Authority
CH
Switzerland
Prior art keywords
reaction product
product obtained
dye
preparing
coloring reaction
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH144496A publication Critical patent/CH144496A/en

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  • Coloring (AREA)

Description

  

      Verfahren    zur Darstellung     eines    aus     einem        lilonoazofarbstoff    erhaltenen, färbenden       Reaktionsproduktes.       Es wurde gefunden, dass ein wertvoller,  brauner Farbstoff von noch unbekannter  Konstitution entsteht, wenn man die Verbin  dung     Amidonaphtolsulfosäure    - ?,8,6 -     azo-          resorcin    bei     Gegenwart    von wässerigem     Am-          tnoniak    mit     Oxydationsmitteln,    vorzugsweise       rnit    Luft,

       behandelt.    Der neue Farbstoff  stellt ein dunkles Pulver dar, das sich in  Wasser mit rotbrauner, in konzentrierter       Schwefelsäure    mit.     braunviolc@iter    Farbe löst.  Im Gegensatz zum     Ausgangsfarbstoff    färbt  \er Wolle und Seide kaum mehr an, dagegen  erzeugt er auf Leder ein schönes.     sattes     Braun, dessen Farbton von dem Grade der  Oxydation     abhängig    ist. Diese Lederfärbun  gen sind ausgezeichnet durch hervorragende  Echtheit gegen Licht und alkalischen Fett  liquor.  



  <I>Beispiel:</I>  Eine Lösung von     2=r    Teilen des     @iono-          azofarbstoffes    aus     Amidonaphtolsulfosäure-          3,8,6    und     Resorcin    in 100-150 Teilen Was-         ser    wird mit 80-50 Teilen Ammoniak von       ?0%    versetzt und     bei    zirka 80       C-    unter  Rühren Luft durchgeleitet. Die anfänglich  orange Lösung wird bald tiefbraun. Die  Oxydation ist beendet, wenn Nuance und  Stärke der Lösung sich nicht mehr ändern.  was nach einigen     Stunden    der Fall ist.

   Als  dann wird mit Salzsäure angesäuert, mit  Hochsalz gefällt, filtriert und getrocknet.  Der Farbstoff kann auch direkt durch Ein  dämpfen der     ammoniakalischen    Lösung ge  wonnen werden.



      Process for preparing a coloring reaction product obtained from a lilonoazo dye. It has been found that a valuable brown dye of as yet unknown constitution is formed if the compound amidonaphtholsulfonic acid -?, 8,6 - azo-resorcinol is used in the presence of aqueous ammonia with oxidizing agents, preferably with air,

       treated. The new dye is a dark powder that dissolves in water with red-brown, in concentrated sulfuric acid with. Braunviolc @ iter color dissolves. In contrast to the original dye, it hardly stains wool and silk, but creates a beautiful color on leather. deep brown, the color of which depends on the degree of oxidation. These leather dyes are distinguished by their excellent fastness to light and alkaline liquor.



  <I> Example: </I> A solution of 2 = r parts of the @ionoazo dye from amidonaphtholsulfonic acid 3,8,6 and resorcinol in 100-150 parts of water is mixed with 80-50 parts of ammonia of? 0% added and air passed through at about 80 C- with stirring. The initially orange solution soon turns deep brown. The oxidation is over when the shade and strength of the solution no longer change. which is the case after a few hours.

   Then it is acidified with hydrochloric acid, precipitated with high salt, filtered and dried. The dye can also be obtained directly by steaming the ammoniacal solution.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines aus einem 1VIonoazofarbstoff erhaltenen, färben den Reaktionsproduktes, dadurch gekenn zeichnet, dass man die Verbindung Amido- xzaphtolsulfosäure-2,8,6-azo-resorcin bei Ge genwart von wässerigem Ammoniak mit Oxydationsmitteln behandelt. Der neue Farb stoff stellt ein dunkles Pulver dar und löst sich in Wasser mit rotbrauner, in konzen trierter Schwefelsäure mit braunvioletter Farbe. UNTERANSPRÜCHE: 1. Verfahren nach Patentanspruch, dadurch ,gekennzeichnet, dass die Oxydation mit Hilfe von Luft herbeigeführt wird. Claim: A process for the preparation of a reaction product obtained from a 1Vionoazo dye, characterized in that the compound amido-xzaphthol sulfonic acid-2,8,6-azo-resorcinol is treated with oxidizing agents in the presence of aqueous ammonia. The new dye is a dark powder and dissolves in water with a red-brown, in concentrated sulfuric acid with a brown-violet color. SUBClaims: 1. Method according to claim, characterized in that the oxidation is brought about with the aid of air. ?. Verfahren nach Patentanspruch, dadurch gekennzeichnet. dass die Reaktion bei einer 80 C übersteigenden Temperatur durch geführt wird. ?. Method according to patent claim, characterized. that the reaction is carried out at a temperature exceeding 80 C.
CH144496D 1928-02-20 1929-02-18 Process for preparing a coloring reaction product obtained from a monoazo dye. CH144496A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE144496X 1928-02-20
CH142445T 1932-02-04

Publications (1)

Publication Number Publication Date
CH144496A true CH144496A (en) 1930-12-31

Family

ID=25714058

Family Applications (1)

Application Number Title Priority Date Filing Date
CH144496D CH144496A (en) 1928-02-20 1929-02-18 Process for preparing a coloring reaction product obtained from a monoazo dye.

Country Status (1)

Country Link
CH (1) CH144496A (en)

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