CH209105A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH209105A
CH209105A CH209105DA CH209105A CH 209105 A CH209105 A CH 209105A CH 209105D A CH209105D A CH 209105DA CH 209105 A CH209105 A CH 209105A
Authority
CH
Switzerland
Prior art keywords
preparation
azo dye
parts
aminonaphthalene
aminophenol
Prior art date
Application number
Other languages
German (de)
Inventor
A-G J R Geigy
Original Assignee
Geigy Ag J R
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 Geigy Ag J R filed Critical Geigy Ag J R
Publication of CH209105A publication Critical patent/CH209105A/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
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/06—Monoazo dyes prepared by diazotising and coupling from coupling components containing amino as the only directing group
    • 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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Gegenstand des vorliegenden Zusatzpaten  tes ist ein Verfahren zur Darstellung eines       Azofarbstoffes,    dadurch gekennzeichnet, dass  man     5-Nitro-4-methyl-2-aminophenol        diazo-          tiert    und mit     2-Aminonaphthalin-5-sulfo-3-          carbonsäure    kuppelt. Der so erhaltene Farb  stoff färbt Wolle sauer nach dem     Nachchro-          mierungsverfahren    rein grasgrün.

   Die Fär  bungen sind sehr gut     walk-    und     pottingecht,     sehr egal und von     ausgezeichneter    Lichtecht  heit.  



  <I>Beispiel:</I>  Die nach üblicher Methode hergestellte       Diazoverbindung    aus 16,8 Teilen     5-Nitro-4-          methyl-2-aminophenol    wird mit Natrium  acetat kongoneutral gestellt und in eine deut  lich essigsauer eingestellte Lösung von  27,5 Teilen     2-Aminonaphthalin-5-sulfo-3-car-          bonsäure,    die     vorgängig    mit 15 Teilen 25     %-          igem    Ammoniak in 400 Teilen Wasser ge  löst, mit 15 Teilen     Natriumacetat    versetzt  und mit Essigsäure schwach angesäuert    wurde, eingetragen.

   Man hält die Kupplungs  temperatur bis zur Beendigung der     Farb-          stoffbildung    bei ungefähr 20   C; dann wird  filtriert,     nach    üblichem Verfahren das Na  triumsalz hergestellt,     ausgesalzen    und     abfil-          triert.     



  Der Farbstoff, ein dunkles Pulver, ist in  Wasser     bläulichrot    und in     konzentrierter     Schwefelsäure blauviolett löslich.



  Process for the preparation of an azo dye. The present additional patent is a process for preparing an azo dye, characterized in that 5-nitro-4-methyl-2-aminophenol is diazo- and coupled with 2-aminonaphthalene-5-sulfo-3-carboxylic acid. The dyestuff obtained in this way dyes wool in an acidic, pure grass-green color using the post-chroming process.

   The dyeings are very good mill and potting fast, very irrelevant and of excellent light fastness.



  <I> Example: </I> The diazo compound produced by the customary method from 16.8 parts of 5-nitro-4-methyl-2-aminophenol is rendered Congo-neutral with sodium acetate and placed in a solution of 27.5 parts that is clearly acidic 2-aminonaphthalene-5-sulfo-3-carboxylic acid, which was previously dissolved with 15 parts of 25% ammonia in 400 parts of water, mixed with 15 parts of sodium acetate and made weakly acidic with acetic acid, entered.

   The coupling temperature is kept at about 20 C until the dye formation has ended; Then it is filtered, the sodium salt is prepared according to the usual method, salted out and filtered off.



  The dye, a dark powder, is bluish red in water and blue-violet soluble in concentrated sulfuric acid.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man 5- Nitro-4-methyl-2-aminophenol diazotiert und mit 2-Aminonaphthalin-5-sulfo-3-carbonsäure kuppelt. Der so erhaltene Farbstoff färbt Wolle sauer nach dem Nachehromierungsver- fahren rein grasgrün. Die Färbungen sind sehr gut walk- und pottingecht, sehr egal und von ausgezeichneter Lichtechtheit. PATENT CLAIM: A process for the preparation of an azo dye, characterized in that 5-nitro-4-methyl-2-aminophenol is diazotized and coupled with 2-aminonaphthalene-5-sulfo-3-carboxylic acid. The dyestuff obtained in this way dyes wool in an acidic manner according to the Nachehromierungsver- method pure grass green. The dyeings are very good millfast and potting fast, very unimportant and of excellent lightfastness.
CH209105D 1937-12-29 1937-12-29 Process for the preparation of an azo dye. CH209105A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH209105T 1937-12-29
CH203951T 1938-06-04

Publications (1)

Publication Number Publication Date
CH209105A true CH209105A (en) 1940-03-15

Family

ID=25723987

Family Applications (1)

Application Number Title Priority Date Filing Date
CH209105D CH209105A (en) 1937-12-29 1937-12-29 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH209105A (en)

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