CH263503A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH263503A
CH263503A CH263503DA CH263503A CH 263503 A CH263503 A CH 263503A CH 263503D A CH263503D A CH 263503DA CH 263503 A CH263503 A CH 263503A
Authority
CH
Switzerland
Prior art keywords
blue
dye
azo dye
violet
preparation
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellschaft Ciba
Original Assignee
Ciba Geigy
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 Ciba Geigy filed Critical Ciba Geigy
Publication of CH263503A publication Critical patent/CH263503A/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
    • C09B45/00—Complex metal compounds of azo dyes
    • C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/14—Monoazo compounds
    • C09B45/16—Monoazo compounds containing chromium

Landscapes

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

Description

  

  Verfahren zur Herstellung eines     Azofarbstoffes.       Es wurde gefunden, dass ein wertvoller       Azofarbstoff    hergestellt werden kann, wenn  man     diazotierte        6-Nitro-2-amino-l-phenol-4-          sulfonsäure    mit     Glycerin-mono-(6-oxy-2-          naphthyl)-äther    kuppelt.  



  Der neue Farbstoff stellt. ein schwärz  liches Pulver dar, das sich in Wasser und  verdünnter     Sodalösung    mit blauvioletter, in  konzentrierter Schwefelsäure mit     violettroter     Farbe löst. Der Farbstoff färbt. Wolle aus  saurem Bade in blauen Tönen, die durch       Nachchromieren    in ein echtes blaustichiges       Olivgrau    übergeführt. werden.  



  Die Kupplung     erfolgt        zweckmässig    in al  kalischem, z. B.     Alkalihydroxy    d und gegebe  nenfalls     Alkalicarbonat    enthaltendem     Medium.       <I>Beispiel:</I>  23,4 Teile     6-Nitro-2-amino-l-phenol-4-sul-          fonsäure    werden in bekannter Weise     diazotiert       und in alkalischer Lösung mit 24 Teilen     Glv-          cerin-mono-(6-oxy-2-naphthyl)-äther    gekup  pelt. Nach beendeter Kupplung wird der  Farbstoff durch     Kochsalzzugabe    abgeschie  den,     abfiltriert    und getrocknet.



  Process for the preparation of an azo dye. It has been found that a valuable azo dye can be produced if diazotized 6-nitro-2-amino-1-phenol-4-sulfonic acid is coupled with glycerol mono- (6-oxy-2-naphthyl) ether.



  The new dye represents. a blackish powder that dissolves in water and dilute soda solution with a blue-violet color, in concentrated sulfuric acid with a violet-red color. The dye stains. Wool from an acid bath in blue tones, which are converted into a real blue-tinged olive-gray by re-chrome plating. will.



  The coupling is expedient in al kalischem, z. B. Alkali hydroxide and optionally alkali carbonate-containing medium. <I> Example: </I> 23.4 parts of 6-nitro-2-amino-1-phenol-4-sulphonic acid are diazotized in a known manner and mixed with 24 parts of glycerin-mono- (6 -oxy-2-naphthyl) ether coupled. After coupling is complete, the dye is deposited by adding sodium chloride, filtered off and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man di- azotierte 6-Nitro-2-amino-l-phenol-4-sulfon- säure mit Glycerin-mono- (6-oxy-2-naphthyl) - äther kuppelt. PATENT CLAIM: Process for the production of an azo dye, characterized in that diazotized 6-nitro-2-amino-1-phenol-4-sulfonic acid is mixed with glycerol mono- (6-oxy-2-naphthyl) - ether coupling. Der neue Farbstoff stellt ein schwärz liches Pulver dar, das sich in Wasser und verdünnter Sodalösung mit blauvioletter, in konzentrierter Schwefelsäure mit violettroter Farbe löst. Der Farbstoff färbt Wolle aus saurem Bade in blauen Tönen, die durch Nachchromieren in ein echtes blaustichiges Olivgrau übergeführt werden. The new dye is a blackish powder that dissolves in water and dilute soda solution with a blue-violet color, in concentrated sulfuric acid with a violet-red color. The dye dyes wool from an acid bath in blue tones, which are converted into a real blue-tinged olive gray by subsequent chrome plating.
CH263503D 1942-12-22 1942-12-22 Process for the preparation of an azo dye. CH263503A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH263503T 1942-12-22
CH257111T 1943-11-04

Publications (1)

Publication Number Publication Date
CH263503A true CH263503A (en) 1949-08-31

Family

ID=25730042

Family Applications (1)

Application Number Title Priority Date Filing Date
CH263503D CH263503A (en) 1942-12-22 1942-12-22 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH263503A (en)

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