CH173981A - Process for the preparation of a dye of the anthracene series. - Google Patents

Process for the preparation of a dye of the anthracene series.

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Publication number
CH173981A
CH173981A CH173981DA CH173981A CH 173981 A CH173981 A CH 173981A CH 173981D A CH173981D A CH 173981DA CH 173981 A CH173981 A CH 173981A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
anthracene series
anthracene
series
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH173981A publication Critical patent/CH173981A/en

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Description

  

      Verfahren    zur     Darstellnng    eines Farbstoffes der     Anthracenreihe.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Darstellung eines     Farbstoffes     der     Anthracenreihe,    welches dadurch gekenn  zeichnet ist, dass man den aus     2-Aminoan-          thrachinon-3-diäthylsulfonamid    erhältlichen       Leukoschwefelsäureester    in alkalischem Me  dium mit     Bleisuperoxyd    oxydiert.  



  <I>Beispiel:</I>  400 Gewichtsteile des     Dikaliumsalzes    aus  2     -Amiiioanthrachinon    - 3 -     diäthylsulfonamid     dargestellten     Leukoschwefelsäureesters    (ent  haltend 115 Gewichtsteile     2-Aminoanthra-          chinon-3-diäthylsulfonamid)    werden unter Zu  satz von 100 Gewichtsteilen 33prozentiger  Natronlauge in 1000 Gewichtsteilen Wasser  gelöst. Bei einer Temperatur von<B>705</B> bis 80 0  gibt man 320 Gewichtsteile einer Bleisuper  oxydpaste von 46,4      /o    zu und rührt etwa  3 Stunden.

   Nun leitet man     C0..    ein, bis die  Natronlauge in     Natriumcarbonat    übergeführt  ist, saugt ab und isoliert aus der gelben  Lösung durch     Aussalzen    als Endprodukt des    Verfahrens eine neue Verbindung in Form  goldgelber Nadeln. Sie löst sich in Wasser  mit gelber Farbe und grüner Fluoreszenz.  Mineralsäuren fällen einen     violettroten    Nie  derschlag, der durch saure Oxydationsmittel  in ein lebhaftes. Blau umgewandelt wird,  vermutlich in das 3 .     3'-Di        (diäthylsulfonamid)     des     Indanthrens.  



      Process for the preparation of a dye of the anthracene series. The subject of the present patent is a process for the preparation of a dye of the anthracene series, which is characterized in that the leuco-sulfuric acid ester obtainable from 2-aminoanthrachinone-3-diethylsulfonamide is oxidized in an alkaline medium with lead peroxide.



  <I> Example: </I> 400 parts by weight of the dipotassium salt of 2-aminoanthraquinone-3-diethylsulfonamide leucosulfonamide (containing 115 parts by weight of 2-aminoanthraquinone-3-diethylsulfonamide) are added to 1000 parts by weight of 33 percent sodium hydroxide solution Dissolved water. At a temperature of 705 to 80 0, 320 parts by weight of a lead superoxide paste of 46.4 per cent are added and the mixture is stirred for about 3 hours.

   C0 .. is now passed in until the sodium hydroxide solution has been converted into sodium carbonate, and a new compound in the form of golden yellow needles is isolated from the yellow solution by salting out as the end product of the process. It dissolves in water with a yellow color and green fluorescence. Mineral acids precipitate a violet-red precipitate, which by acidic oxidizing agents turns into a lively one. Blue is converted, presumably to the 3rd 3'-Di (diethylsulfonamide) of indanthrene.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Farb stoffes der Antbracenreihe, dadurch gekenn zeichnet, dass man den aus 2-Aminoanthra- chinon-3-diäthy1sulfonamid erhältlichen Leu- koschwefelsäureester in alkalischem Medium mit Bleisuperoxyd oxydiert. Der neue Farbstoff stellt ein goldgelbes Produkt dar, welches sich leicht in Wasser mit gelber Farbe und grüner Fluoreszenz löst. PATENT CLAIM: A process for the preparation of a dye of the anthracene series, characterized in that the leucosulfuric acid ester obtainable from 2-aminoanthraquinone-3-diethy1sulfonamide is oxidized in an alkaline medium with lead peroxide. The new dye is a golden yellow product that dissolves easily in water with a yellow color and green fluorescence.
CH173981D 1932-03-26 1933-03-21 Process for the preparation of a dye of the anthracene series. CH173981A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE173981X 1932-03-26
CH170092T 1933-03-21

Publications (1)

Publication Number Publication Date
CH173981A true CH173981A (en) 1934-12-15

Family

ID=25718867

Family Applications (1)

Application Number Title Priority Date Filing Date
CH173981D CH173981A (en) 1932-03-26 1933-03-21 Process for the preparation of a dye of the anthracene series.

Country Status (1)

Country Link
CH (1) CH173981A (en)

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