CH150807A - Process for the preparation of a readily water-soluble dye of the anthraquinone series. - Google Patents

Process for the preparation of a readily water-soluble dye of the anthraquinone series.

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Publication number
CH150807A
CH150807A CH150807DA CH150807A CH 150807 A CH150807 A CH 150807A CH 150807D A CH150807D A CH 150807DA CH 150807 A CH150807 A CH 150807A
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CH
Switzerland
Prior art keywords
dye
blue
green
preparation
color
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 CH150807A publication Critical patent/CH150807A/en

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Description

  

      Verfahren    zur     Darstellnnb    eines leicht     wasserlöslichen        Farbstoffes     der     Anthrachinonreihe.       Es wurde gefunden, dass man     zii    einem  leicht wasserlöslichen     Farbstoff    der     Anthra-          chinonreihe    gelangt, wenn man     1-amino-2-          brom    - 4 - p -     toluidoanthrachinon    -5-     sulfosaures     Natrium mit wässeriger     Kaliumsulfitlösung     unter Anwendung von Phenol erhitzt.  



  <I>Beispiel</I>       '?0    Teile     1-amino-2-brom-4-p-toluidoan-          thrachinoci-5-sulfosaures    Natrium, 40 Teile  Phenol und     40-Volumteile        Kaliumsulfitlösung     47     o/oig        (Vol.)    werden im     Autoklaven    auf  125 o erhitzt, bis die Umsetzung des     R-Brom-          atoms    vollständig ist.  



  Man entfernt das Phenol, durch Ausblasen  mit Wasserdampf, und filtriert den     Farbstoff     ab.  



  Der     Farbstoff    besteht aus     1-Amino-4-p-          toluidoanthrachinon-2,5-disulfosäure    und bil  det blaugraue, feine     gristalle.    In trockenem,  gemahlenem Zustande stellt er ein dunkel  blaues Pulver dar; dasselbe ist in kaltem    Wasser leicht mit grünblauer Farbe löslich.  In Schwefelsäure löst sich der     Farbstoff    mit  blass grüngelber Farbe, die nach Zusatz von  Borsäure blau wird. In Salzsäure löst er sich  mit rotvioletter Farbe; in kaltem Benzol und       Äthylacetat    ist er unlöslich. Das Produkt  färbt Wolle in grünblauen Tönen von vor  züglichen     Echtheiten    und besonders von her  vorragender Lichtechtheit.

   Da der     Farbstoff     gut löslich ist, eignet er sich zum Drucken  von Wolle und     .Seide.  



      Process for the preparation of a readily water-soluble dye of the anthraquinone series. It has been found that a readily water-soluble dye of the anthraquinone series is obtained if 1-amino-2-bromo-4-p-toluidoanthraquinone-5-sulphonic acid sodium is heated with aqueous potassium sulphite solution using phenol.



  <I> Example </I> '? 0 parts of 1-amino-2-bromo-4-p-toluidoanthrachinoci-5-sulphonic acid sodium, 40 parts of phenol and 40 parts by volume of 47% potassium sulphite solution heated in the autoclave to 125 o until the reaction of the R-bromine atom is complete.



  The phenol is removed by blowing out with steam, and the dye is filtered off.



  The dye consists of 1-amino-4-p-toluidoanthraquinone-2,5-disulfonic acid and forms blue-gray, fine crystals. In the dry, ground state it is a dark blue powder; it is easily soluble in cold water with a green-blue color. The dye dissolves in sulfuric acid with a pale green-yellow color that turns blue after adding boric acid. In hydrochloric acid it dissolves with a red-violet color; it is insoluble in cold benzene and ethyl acetate. The product dyes wool in green-blue tones with excellent fastness properties and especially excellent lightfastness.

   Since the dye is easily soluble, it is suitable for printing wool and silk.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines leicht wasserlöslichen Farbstoffes der Anthrachinon- reihe;. welcher zwei Sulfogruppen auf beide Benzolkerne im Anthrachinonkern verteilt ent hält, dadurch gekennzeichnet, .dass man 1 amino-2-brom-4-p-toluoidoanthrachinon -5-sul- fosaures Natrium mit galiumsulfit in wässe riger Lösung, unter Anwendung von Phenol, erhitzt.: PATENT CLAIM: Process for the preparation of a readily water-soluble dye of the anthraquinone series. which contains two sulfo groups distributed on both benzene nuclei in the anthraquinone nucleus, characterized in that 1 amino-2-bromo-4-p-toluoidoanthraquinone -5-sulphate sodium is heated with galium sulphite in an aqueous solution using phenol .: Der Farbstoff besteht aus 1-Amirro-4-p- toluidoänthrachinon-2,5-disulfosäure und bil det blaugraue, feine Kristalle. In trockenem, gemahlenem Zustande stellt er ein dunkel blaues Pulver dar; dasselbe ist in kaltem Wasser leicht mit grünblauer Farbe löslich. In Schwefelsäure löst sich der Farbstoff mit blass grüngelber Farbe, die nach Zusatz von Borsäure blau wird. In Salzsäure löst er sich mit rotvioletter Farbe; in kaltem Benzol und Äthylacetat ist er unlöslich. Das Produkt färbt Wolle in grünblauen Tönen von vorzüglichen Echtheiten und besonders von hervorragender Lichtechtheit. The dye consists of 1-amirro-4-p-toluidoanthraquinone-2,5-disulfonic acid and forms blue-gray, fine crystals. In the dry, ground state it is a dark blue powder; it is easily soluble in cold water with a green-blue color. The dye dissolves in sulfuric acid with a pale green-yellow color that turns blue after adding boric acid. In hydrochloric acid it dissolves with a red-violet color; it is insoluble in cold benzene and ethyl acetate. The product dyes wool in green-blue tones with excellent fastness properties and especially excellent lightfastness. Da der Farbstoff gut löslich ist, eignet er sich zum Drucken von Wolle und Seide. Since the dye is easily soluble, it is suitable for printing wool and silk.
CH150807D 1928-12-20 1929-12-20 Process for the preparation of a readily water-soluble dye of the anthraquinone series. CH150807A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE150807X 1928-12-20
CH149094T 1929-12-20

Publications (1)

Publication Number Publication Date
CH150807A true CH150807A (en) 1931-11-15

Family

ID=25715339

Family Applications (1)

Application Number Title Priority Date Filing Date
CH150807D CH150807A (en) 1928-12-20 1929-12-20 Process for the preparation of a readily water-soluble dye of the anthraquinone series.

Country Status (1)

Country Link
CH (1) CH150807A (en)

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