CH237186A - Process for the preparation of a disazo dye. - Google Patents

Process for the preparation of a disazo dye.

Info

Publication number
CH237186A
CH237186A CH237186DA CH237186A CH 237186 A CH237186 A CH 237186A CH 237186D A CH237186D A CH 237186DA CH 237186 A CH237186 A CH 237186A
Authority
CH
Switzerland
Prior art keywords
preparation
dye
disazo dye
water
red
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Ind Basel filed Critical Chem Ind Basel
Publication of CH237186A publication Critical patent/CH237186A/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
    • C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
    • C09B31/02—Disazo dyes
    • C09B31/12—Disazo dyes from other coupling components "C"
    • C09B31/14—Heterocyclic components

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Description

  

      Verfahren    zur Herstellung eines     Disazofarbstoffes.       Es wurde gefunden, dass ein wertvoller       Disazofarbstoff    hergestellt werden kann, wenn    man den dianotierten     Aminoazofarbstoff    der  Formel  
EMI0001.0005     
    mit     8-Oxychinolin    vereinigt.  



  Der neue Farbstoff stellt ein dunkelbrau  nes Pulver dar, das sich in Wasser und ver  dünnten Alkalien     mit    roter, in     konzentrierter     Schwefelsäure mit violetter Farbe. löst und       pflanzliche    Fasern in lebhaften roten Tönen  färbt, die beim Nachkupfern licht- und wasch  echter werden.  



  Der dem     vorliegenden    Verfahren als Aus  gangsstoff dienende     Aminoazofarbstoff    der  obigen Formel kann z. B. durch     Kuppeln    von  dianotierter     2-Amino-1-methoxybenzol-4-sul-          fonsäure    mit     2-(4'-Aminobenzoyl)-amino-5-          oxynaphthalin-7-sulfonsäure    erhalten werden.    Die Dianotierung kann in bekannter Weise  z.

   B. so vorgenommen werden, dass man eine  Lösung     bezw.    Suspension des     Aminoazofarb-          stoffes    in neutralem oder schwach     alkalischem     Medium mit der nötigen Menge Nitrit versetzt  und dann ansäuert.  



  Die Kupplung der dianotierten     Aminoazo-          verbindnng    mit     8-Oxychinolin    erfolgt in alka  lischem, z. B.     Alkahhydroxyd    und     Alkalicar-          bonat    enthaltendem Medium.         Beispiel:     Der mit     Kochsalz    abgeschiedene, filtrierte  und     abgepresste        Aminoazofarbstoff,    der aus    
EMI0002.0001     
  
   
EMI0002.0002     
  




      Process for the preparation of a disazo dye. It has been found that a valuable disazo dye can be made using the dianotated aminoazo dye of the formula
EMI0001.0005
    combined with 8-oxyquinoline.



  The new dye is a dark brown powder that dissolves in water and diluted alkalis with red, in concentrated sulfuric acid with purple color. dissolves and dyes vegetable fibers in lively red tones, which become more light and washable when re-coppering.



  The aminoazo dye of the above formula serving as starting material for the present process can, for. B. by coupling dianotated 2-amino-1-methoxybenzene-4-sulfonic acid with 2- (4'-aminobenzoyl) -amino-5-oxynaphthalene-7-sulfonic acid. The Dianotierung can in a known manner, for.

   B. be made so that one respectively a solution. Suspension of the aminoazo dye in a neutral or weakly alkaline medium mixed with the necessary amount of nitrite and then acidified.



  The coupling of the dianotized aminoazo compound with 8-oxyquinoline takes place in alkaline, z. B. Alkahhydroxyd and alkali carbonate containing medium. Example: The aminoazo dye separated out with table salt, filtered and pressed out, the
EMI0002.0001
  
   
EMI0002.0002

Claims (1)

EMI0002.0003 EMI0002.0004 mit 8-Oxychinolin vereinigt. Der neue Farbstoff stellt en dunkelbraunes Pulver dar, das sich in TVasser und verdünn ten Alkalien mit roter, in konzentrierter Schwefelsäure mit violetter Farbe löst und pflanzliche Fasern in lebhaften roten Tönen färbt, die beim --Nachkupfern licht- und waseli- echter werden. EMI0002.0003 EMI0002.0004 combined with 8-oxyquinoline. The new dye is a dark brown powder that dissolves in water and diluted alkalis with red, in concentrated sulfuric acid with violet color and colors vegetable fibers in vivid red tones, which become more light and water-like with copper-plating.
CH237186D 1943-06-24 1942-08-21 Process for the preparation of a disazo dye. CH237186A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH237186T 1943-06-24

Publications (1)

Publication Number Publication Date
CH237186A true CH237186A (en) 1945-04-15

Family

ID=4459821

Family Applications (1)

Application Number Title Priority Date Filing Date
CH237186D CH237186A (en) 1943-06-24 1942-08-21 Process for the preparation of a disazo dye.

Country Status (1)

Country Link
CH (1) CH237186A (en)

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