CH263508A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH263508A
CH263508A CH263508DA CH263508A CH 263508 A CH263508 A CH 263508A CH 263508D A CH263508D A CH 263508DA CH 263508 A CH263508 A CH 263508A
Authority
CH
Switzerland
Prior art keywords
dye
dissolves
hot
azo dye
violet
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 CH263508A publication Critical patent/CH263508A/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)
  • Coloring (AREA)

Description

  

  Verfahren zur Herstellung eines     Azofarbatoffes.       Es wurde gefunden, dass ein wertvoller       Azofarbstoff    hergestellt werden kann, wenn  man     diazotiertes        6-Nitro-4-methyl-2-amino-l-          phenol    mit     C=ly        cerin-mono-        (6-oxy-2-naphthyl)        -          äther    kuppelt.  



  Der neue Farbstoff stellt ein violett  schwarzes Pulver dar, das sich in heissem  Wasser oder verdünnter heisser     Sodalösung     mit blauer, in verdünnter heisser Natronlauge  mit schmutzig violetter und in konzentrierter  Schwefelsäure mit violetter Farbe löst. Der  Farbstoff färbt Wolle aus schwach saurem  Bade in violetten Tönen, die durch     Nach-          ehromieren    in ein echtes Grau übergeführt  werden. Der Farbstoff eignet sich vorzüglich       zum    Färben von "olle nach dem     Einbad-          chromierverfahren.     



  Die Kupplung erfolgt     zweckmässig    in al  kalischem, z. B.     Alkalihydroxyd    und gegebe  nenfalls     Alkalicarbonat    enthaltendem Medium.    <I>Beispiel:</I>  16,8 Teile     6-Nitro-4-met.hyl-2-amino-l-phe-          nol    werden in bekannter Weise     diazotiert    und    in alkalischem Medium mit 24 Teilen     Gly-          cerin-mono-(6-oxy-2-naphthyl)-äther    gekup  pelt. Nach beendeter Kupplung wird der     abge-          sehiedene    Farbstoff     abfiltriert    und getrocknet.



  Process for the production of an azo carbate. It has been found that a valuable azo dye can be produced if diazotized 6-nitro-4-methyl-2-amino-1-phenol is coupled with C = lycerin mono- (6-oxy-2-naphthyl) ether .



  The new dye is a purple-black powder that dissolves in hot water or dilute hot soda solution with blue, in dilute hot sodium hydroxide solution with dirty purple and in concentrated sulfuric acid with purple color. The dye dyes wool from a weakly acidic bath in violet tones, which are transformed into a real gray by repeating the mapping. The dye is particularly suitable for dyeing oil using the single-bath chroming process.



  The coupling is expedient in al kalischem, z. B. alkali hydroxide and optionally alkali carbonate-containing medium. <I> Example: </I> 16.8 parts of 6-nitro-4-methyl-2-amino-1-phenol are diazotized in a known manner and in an alkaline medium with 24 parts of glycerin mono- (6-oxy-2-naphthyl) ether coupled. After the coupling has ended, the dyestuff which has separated off is filtered off and dried.

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines Azofarb- st.offes, dadurch gekennzeichnet, dass man di- azotiertes 6-Nitro-4-methyl-2-amino-l-phenol mit Glycerin-mono-(6-oxy-2-naphthyl)-äther kuppelt. Der neue Farbstoff stellt ein violett schwarzes Pulver dar, das sich in heissem Wasser oder verdünnter heisser Sodalösuno@ mit. blauer, in verdünnter heisser Natronlauge mit schmutzig violetter und in konzentrierter Schwefelsäure mit violetter Farbe löst.. PATENT CLAIM A process for the production of an azo dye, characterized in that diazoated 6-nitro-4-methyl-2-amino-1-phenol with glycerol mono- (6-oxy-2-naphthyl) ether clutch. The new dye is a purple-black powder that dissolves in hot water or diluted hot Sodalösuno @ with. blue, dissolves in dilute hot sodium hydroxide solution with dirty violet color and in concentrated sulfuric acid with violet color. Der Farbstoff färbt Wolle aus schwach saurem Bade in violetten Tönen, die durch Nach- ehromieren in ein echtes Grau übergeführt werden. Der Farbstoff eignet sich vorzüglich zum Färben von Wolle nach dem Einbad chromierv erfahren. The dye dyes wool from a weakly acidic bath in violet tones, which are transformed into a real gray by repeating the mapping. The dye is particularly suitable for dyeing wool after it has been bathed in chrome.
CH263508D 1942-12-22 1942-12-22 Process for the preparation of an azo dye. CH263508A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH263508T 1942-12-22
CH257111T 1943-11-04

Publications (1)

Publication Number Publication Date
CH263508A true CH263508A (en) 1949-08-31

Family

ID=25730047

Family Applications (1)

Application Number Title Priority Date Filing Date
CH263508D CH263508A (en) 1942-12-22 1942-12-22 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH263508A (en)

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