CH157834A - Process for the preparation of an acidic dye. - Google Patents

Process for the preparation of an acidic dye.

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Publication number
CH157834A
CH157834A CH157834DA CH157834A CH 157834 A CH157834 A CH 157834A CH 157834D A CH157834D A CH 157834DA CH 157834 A CH157834 A CH 157834A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
amino
acidic dye
acid
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 CH157834A publication Critical patent/CH157834A/en

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Description

  

      Verfahren    zur Darstellung eines     sauren    Farbstoffes.    Gegenstand dieses Zusatzpatentes ist ein  Verfahren zur Darstellung eines sauren Farb  stoffes, das dadurch gekennzeichnet ist, dass  der durch Kondensation von     1-Amino-4-brom-          anthrachinon-2-sulfosäure    mit     p-Aminozimmt-          säure    erhältliche     Farbstoff    durch Behandeln  mit Methylalkohol und Salzsäure in der  Wärme in seinen     Methylester    übergeführt  wird.  



  <I>Beispiel:</I>  Der durch Kondensation von     1-Amino-4-          bromanthrachinon-2-sulfosäure    und     p-Amino-          zimmtsäure    erhältliche     Farbstoff    wird in  Methylalkohol in der Wärme vollständig  gelöst.  



  Die Lösung wird mit trockenem Chlor  wasserstoff gesättigt und etwa 10 Stunden  lang unter     Rückfluss    erhitzt, wodurch die       Farbstoffkarbonsäure    in ihren     Methylester       übergeführt wird. Das Produkt färbt Wolle  in sehr grünstickig blauen Tönen von guten  Echtheitseigenschaften.



      Process for the preparation of an acidic dye. The subject of this additional patent is a process for the preparation of an acidic dye, which is characterized in that the dye obtainable by the condensation of 1-amino-4-bromo-anthraquinone-2-sulfonic acid with p-amino carcous acid is obtained by treatment with methyl alcohol and hydrochloric acid is converted into its methyl ester in the heat.



  <I> Example: </I> The dye obtainable by condensation of 1-amino-4-bromoanthraquinone-2-sulfonic acid and p-amino-cinnamic acid is completely dissolved in methyl alcohol when heated.



  The solution is saturated with dry hydrogen chloride and refluxed for about 10 hours, whereby the dye carboxylic acid is converted into its methyl ester. The product dyes wool in very greenish blue tones with good fastness properties.

Claims (1)

PATENTANSPRUCH Verfahren zur Darstellung eines sauren Farbstoffes, dadurch gekennzeichnet, dass der durch Kondensation von 1-Amino-4-brom- anthrachinon-2-sulfosäure mit p-Aminozimmt- säure erhältliche Farbstoff durch Behandeln mit Methylalkohol und Salzsäure in der Wärme in seinen Methylester übergeführt wird. Der so erhaltene Farbstoff färbt Wolle in sehr grünstickig blauen Tönen von guten Echtheitseigenschaften. PATENT CLAIM Process for the preparation of an acidic dye, characterized in that the dye obtainable by condensation of 1-amino-4-bromo-anthraquinone-2-sulfonic acid with p-amino carcotic acid is converted into its methyl ester by heat treatment with methyl alcohol and hydrochloric acid becomes. The dye thus obtained dyes wool in very greenish blue shades with good fastness properties.
CH157834D 1930-04-04 1931-04-01 Process for the preparation of an acidic dye. CH157834A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE157834X 1930-04-04
CH154179T 1931-04-01

Publications (1)

Publication Number Publication Date
CH157834A true CH157834A (en) 1932-10-15

Family

ID=25716387

Family Applications (1)

Application Number Title Priority Date Filing Date
CH157834D CH157834A (en) 1930-04-04 1931-04-01 Process for the preparation of an acidic dye.

Country Status (1)

Country Link
CH (1) CH157834A (en)

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