CH157839A - Process for the preparation of an acidic dye. - Google Patents

Process for the preparation of an acidic dye.

Info

Publication number
CH157839A
CH157839A CH157839DA CH157839A CH 157839 A CH157839 A CH 157839A CH 157839D A CH157839D A CH 157839DA CH 157839 A CH157839 A CH 157839A
Authority
CH
Switzerland
Prior art keywords
dye
preparation
acidic dye
anilido
carboxy
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 CH157839A publication Critical patent/CH157839A/en

Links

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 Farbstoff     1-Aminoanthrachinon-4-anilido-          6-carboxy-2-sulfosäure    durch Behandeln mit  Äthylalkohol und     Chlorwasserstoff    in der  Wärme in seinen     Äthylester    übergeführt  wird.

      <I>Beispiel:</I>  16 Gewichtsteile     1-Aminoanthrachinon-4-          anilido-6-carboxy-2-sulfosäur    e (erhältlich durch  Kondensation von     1-Aminoanthrachinon-2.4-          dibroin-6-carbonsäure    mit Anilin in Gegenwart  von     Natriumcarbonat    und etwas     Kupferchlo-          rür    und Ersatz des     Brom-Atoms    in der so  erhaltenen     1-Aminoaiithrachinon-2-brom-4-          anilido-6-carbonsäure    durch die     Sulfogruppe     durch Behandeln mit     Kaliumsulfit    in Gegen  wart von Phenol werden in 200 Gewichts  teilen 

  absolutem Äthylalkohol suspendiert.  Unter Erwärmen wird in diese Suspension  trockener     Chlorwasserstoff    eingeleitet. Der so  gebildete Ester scheidet sich ab, er wird ab-    gesaugt, mit Alkohol gewaschen und ge  trocknet. Er bildet nach dem Trocknen ein  blaues Pulver, färbt Wolle aus saurem Bade  in echten blauen Tönen von vorzüglichen  Echtheitseigenschaften, insbesondere von sehr  guter Wasch- und     Walkechtheit.  



      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 1-aminoanthraquinone-4-anilido-6-carboxy-2-sulfonic acid is converted into its ethyl ester by treating it with ethyl alcohol and hydrogen chloride under heat .

      <I> Example: </I> 16 parts by weight of 1-aminoanthraquinone-4-anilido-6-carboxy-2-sulfonic acid (obtainable by condensation of 1-aminoanthraquinone-2,4-dibroin-6-carboxylic acid with aniline in the presence of sodium carbonate and A little copper chlorine and replacement of the bromine atom in the 1-aminoithraquinone-2-bromo-4-anilido-6-carboxylic acid thus obtained by the sulfo group by treatment with potassium sulfite in the presence of phenol are divided into 200 parts by weight

  suspended in absolute ethyl alcohol. Dry hydrogen chloride is passed into this suspension with heating. The ester formed in this way separates, it is filtered off with suction, washed with alcohol and dried. After drying, it forms a blue powder and dyes wool from an acid bath in real blue shades with excellent fastness properties, in particular very good wash and milled fastness.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines sauren Farbstoffes, dadurch gekennzeichnet, dass der Farbstoff 1-Aminoanthi-achinon-4-anilido-6- carboxy-2-sulfosaure durch Behandeln mit Äthylalkohol und Chlorwasserstoff in der Wärme in seinen Äthylester übergeführt wird. Der so erhaltene Farbstoff bildet nach dem Trocknen ein blaues Pulver; er färbt Wolle aus saurem Bade in echten blauen Tönen von vorzüglichen Echtheitseigenschaf ten, insbesondere von guter Wasch- und Walkechtheit. PATENT CLAIM: Process for the preparation of an acidic dye, characterized in that the dye 1-aminoanthi-achinon-4-anilido-6-carboxy-2-sulfonic acid is converted into its ethyl ester by treatment with ethyl alcohol and hydrogen chloride under heat. The dye thus obtained forms a blue powder after drying; it dyes wool from an acid bath in real blue tones with excellent fastness properties, especially good fastness to washing and boiling.
CH157839D 1931-01-14 1931-11-27 Process for the preparation of an acidic dye. CH157839A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE157839X 1931-01-14
CH154179T 1931-04-01

Publications (1)

Publication Number Publication Date
CH157839A true CH157839A (en) 1932-10-15

Family

ID=25716392

Family Applications (1)

Application Number Title Priority Date Filing Date
CH157839D CH157839A (en) 1931-01-14 1931-11-27 Process for the preparation of an acidic dye.

Country Status (1)

Country Link
CH (1) CH157839A (en)

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