CH209643A - Process for the production of a vat dye - Google Patents

Process for the production of a vat dye

Info

Publication number
CH209643A
CH209643A CH209643DA CH209643A CH 209643 A CH209643 A CH 209643A CH 209643D A CH209643D A CH 209643DA CH 209643 A CH209643 A CH 209643A
Authority
CH
Switzerland
Prior art keywords
production
vat dye
vat
acid
yellow
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 CH209643A publication Critical patent/CH209643A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B5/00—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings
    • C09B5/24—Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings the heterocyclic rings being only condensed with an anthraquinone nucleus in 1-2 or 2-3 position
    • C09B5/42—Pyridino anthraquinones

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines     Nüpenfarbstoffes       Es     wurde    gefunden,     dass    man einen wert  vollen neuen     Küpenfarbstoff    erhält, wenn  man     Py2-(p-Aminophenyl)-2;(N),1-pyridino-          anthrachinon    mit oxydierenden     Mitteln:    be  handelt.  



  Als     Oxydationsmittel    seien     zum        Beispiel     Chromsäure,     Mangansäure,    Übermangan  säure,     unterehlorige    und     unterbromige        Säure     genannt.     Main    kann sie     in        saurem,    neutralem  oder     alkalischem        Mittel    einwirken lassen.  



       Salpetrige    !Säure oder diese     unter    den       Umsetzungsbedingungen    abgebende     Stoffe     sind zur     Oxydation    nicht     .geeignet,    da. sie       diazotierend    wirken.  



  Der neue Farbstoff färbt aus     violettroter          Küpe        Baumwolle    in braungelben Tönen, die  sich durch hohe     :Echtheit,        .insbesondere    durch  eine vorzügliche     Lichteehtheit        auszeichnen.     <I>Beispiel:

  </I>  Eine     Aufschlämmung    von fein     verteil-          tem    Py2-(p-Aminophenyl)-2,(N),1-pyridino-         anthrachinon        (erhalten        durch        Reduktion    des  p -     Nstrophenyl    -     2!(N),1-pyridinoanthrachinons     des Aufbaues:  
EMI0001.0043     
    mit     Natriumsulfid    in     alkalischer    Flüssigkeit;

    schöne braune Nadeln aus     Nitrobenzol;        Lö-          sungsfarbe    in Schwefelsäure     .grünst@.chiggelb)     in     verdünnter        Essigsäure    wird     unter    Erwär  men so     lange    mit     Natriumhypochloritlösung     versetzt, bis der     anfangs        rotbraune    Nieder  schlag eine rein gelbe Farbe     angenommen     bat.  



  An     Stelle    der     angesäuerten        Hypoehlorit-          lösung    kann man zum Beispiel auch freies-      Chlor, alkalische     Hypochlorit-    oder     Iiypo-          bromitlösungen,        wässrige        Permanganatlösun-          gen    oder     Chromsäurea.nhydrid    in     Eisessig     verwenden.  



  Der neue     Küpenfarbstoff    färbt aus     vio-          lettroter        Küpe    Baumwolle in braungelben  Tönen. Er     ist    ein gelbes Mehl, das sich in  starker Schwefelsäure mit gelber     Farbe    löst.



  Process for the production of a vat dye It has been found that a valuable new vat dye is obtained if Py2- (p-aminophenyl) -2; (N), 1-pyridino-anthraquinone is treated with oxidizing agents.



  Examples of oxidizing agents which may be mentioned are chromic acid, manganic acid, super manganese acid, hypochloric and hypobromous acid. Main can act in acidic, neutral or alkaline agents.



       Nitrous acid or substances that give off under the reaction conditions are not suitable for oxidation because. they have a diazotizing effect.



  The new dye dyes cotton from purple-red vat in brown-yellow tones, which are characterized by high: fastness, in particular by excellent lightfastness. <I> example:

  </I> A slurry of finely divided Py2- (p-aminophenyl) -2, (N), 1-pyridino-anthraquinone (obtained by reducing the p-nstrophenyl-2! (N), 1-pyridinoanthraquinone of the structure :
EMI0001.0043
    with sodium sulfide in alkaline liquid;

    beautiful brown needles made from nitrobenzene; Solution color in sulfuric acid .green @ .chiggelb) in dilute acetic acid is treated with sodium hypochlorite solution while warming until the initially reddish-brown precipitate has turned a pure yellow color.



  Instead of the acidified hypochlorite solution, it is also possible, for example, to use free chlorine, alkaline hypochlorite or Iypobromite solutions, aqueous permanganate solutions or chromic acid anhydride in glacial acetic acid.



  The new vat dye dyes cotton from purple-red vat in brown-yellow tones. It is a yellow flour that dissolves in strong sulfuric acid with a yellow color.

Claims (1)

PATENTANSPRUCH: Zerfahren zur Herstellung eines Küpen- farbstoffes, dadurch gekennzeichnet, dass man Py2-(p-Aminophenyl)-2,(N),1-pyridino- anthrachinon mit oxydierenden Mitteln be handelt. PATENT CLAIM: Process for the production of a vat dye, characterized in that Py2- (p-aminophenyl) -2, (N), 1-pyridino-anthraquinone is treated with oxidizing agents. Der neue Farbstoff färbt aus violettroter Küpe Baumwolle in braungelben Tönen, die sich durch hohe Echtheit, insbesondere durch eine vorzügliche hichteehtheit auszeichnen. Er lti.st sich in starker Schwefelsäure mit gelber Farbe. The new dye dyes cotton from purple-red vat in brown-yellow tones, which are characterized by high fastness, in particular by excellent hightness. It is dissolved in strong sulfuric acid with a yellow color.
CH209643D 1937-10-14 1938-10-06 Process for the production of a vat dye CH209643A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE209643X 1937-10-14

Publications (1)

Publication Number Publication Date
CH209643A true CH209643A (en) 1940-04-30

Family

ID=5794873

Family Applications (1)

Application Number Title Priority Date Filing Date
CH209643D CH209643A (en) 1937-10-14 1938-10-06 Process for the production of a vat dye

Country Status (1)

Country Link
CH (1) CH209643A (en)

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