CH173978A - 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
CH173978A
CH173978A CH173978DA CH173978A CH 173978 A CH173978 A CH 173978A CH 173978D A CH173978D A CH 173978DA CH 173978 A CH173978 A CH 173978A
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 CH173978A publication Critical patent/CH173978A/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren     zier    Darstellung eines Farbstoffes der     Anthracenreihe.       Gegenstand vorliegenden Patentes ist ein  Verfahren zur Darstellung eines     Farbstoffes     der     Anthracenreihe,    welches dadurch gekenn  zeichnet ist, dass man     2-Chlor-2-aniinoleuko-          anthrachinon-9.10-dischwefelsäureester    in     al-          lialischeni        Aledium        mitBleisuperoxyd    oxydiert.

    <I>Beispiel:</I>  100 Gewichtsteile     Dikaliumsalz    des 3       Chloi--2-aininoleukoanthrachinon-9.10-dischwe-          felsäureesters    werden in etwa 1000 Gewichts  teilen Wasser gelöst und 25 Gewichtsteile  Soda zugefügt. Bei<B>700</B> setzt     man    150 Ge  wichtsteile einer wässerigen     Bleisuperoxyd-          paste        (48"/o)    zu und rührt bei der angege  benen Temperatur 2 bis 3 Stunden.

   Nach  dem Erkalten wird filtriert und aus der  fluoreszierenden tief gelbgefärbten Lösung  durch Zugeben von     Kaliumehlorid    das be-         reits    bekannte Endprodukt des Verfahrens,  ein orangeroter kristallinischer Niederschlag  abgeschieden. Dieser löst sich in Wasser  mit intensiv gelber Farbe. Versetzt man  diese Lösung mit verdünnter Salzsäure, dann  bildet sich ein blaugefärbter Niederschlag,  der auf Zusatz eines Oxydationsmittels, zum  Beispiel     Natriumnitrit,    in ein unlösliches ,  leuchtendes Blau     (Dichlorindanthren)    über  geht.



  Process decorative representation 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 2-chloro-2-aniinoleuko-anthraquinone-9.10-disulfuric acid ester is oxidized with lead superoxide in allyalic aluminum.

    <I> Example: </I> 100 parts by weight of the dipotassium salt of 3 chloi - 2-aininoleukoanthraquinone-9.10-disulfuric acid ester are dissolved in about 1000 parts by weight of water and 25 parts by weight of soda are added. At <B> 700 </B>, 150 parts by weight of an aqueous lead peroxide paste (48 "/ o) are added and the mixture is stirred at the specified temperature for 2 to 3 hours.

   After cooling, it is filtered and the already known end product of the process, an orange-red crystalline precipitate, is deposited from the fluorescent deep yellow solution by adding potassium chloride. This dissolves in water with an intense yellow color. If this solution is mixed with dilute hydrochloric acid, a blue-colored precipitate is formed which, when an oxidizing agent, for example sodium nitrite, is added, turns into an insoluble, bright blue (dichloroindanthrene).

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Farb stoffes der Anthracenreihe, dadurch gekenn zeichnet, dass man 3-Chlor-2-aminoleukoan- thrachinon-9-10-dischwefelsäureester in alkali schem Medium mit Bleisuperoxyd oxydiert. PATENT CLAIM: Process for the preparation of a dye of the anthracene series, characterized in that 3-chloro-2-aminoleukanoanthrachinone-9-10-disulfuric acid ester is oxidized in an alkaline medium with lead peroxide.
CH173978D 1932-03-26 1933-03-21 Process for the preparation of a dye of the anthracene series. CH173978A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE173978X 1932-03-26
CH170092T 1933-03-21

Publications (1)

Publication Number Publication Date
CH173978A true CH173978A (en) 1934-12-15

Family

ID=25718864

Family Applications (1)

Application Number Title Priority Date Filing Date
CH173978D CH173978A (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) CH173978A (en)

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