CH209107A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH209107A
CH209107A CH209107DA CH209107A CH 209107 A CH209107 A CH 209107A CH 209107D A CH209107D A CH 209107DA CH 209107 A CH209107 A CH 209107A
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 CH209107A publication Critical patent/CH209107A/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

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

Description

  

  Verfahren zur Darstellung eines     Azofarbstoffes.       Gegenstand des vorliegenden Zusatzpaten  tes ist ein Verfahren zur Darstellung eines       Azofarbstoffes,    dadurch gekennzeichnet, dass  man     5-Chlor-2-aminophenol        diazotiert    und  mit     2-Aminonaphtalin-5-sulfo-3-carbonsäure     kuppelt. Der so erhaltene Farbstoff färbt  Wolle sauer nach dem     Nachchromierungsver-          fahren    rein grasgrün. Die Färbungen sind  sehr gut walk- und     pottingecht,    sehr egal und  von ausgezeichneter Lichtechtheit.

      <I>Beispiel:</I>    Die nach üblicher Methode hergestellte       Diazoverbindung    aus 16,5 Teilen     5-Chlor-2-          aminophenol    wird mit     Natriumacetat    kongo  neutral gestellt und in eine deutlich essig  sauer     eingestellte    Lösung von 27,5 Teilen     2--          Aminonaphtalin-5-sulfo-3-carbonsäure,    die       vorgängig        mit    15 Teilen 25 %     igem    Ammo  niak in 400 Teilen Wasser gelöst, mit 15 Tei  len     Natriumacetat    und wenig Essigsäure ver-    setzt wurde, eingetragen.

   Man hält die Kupp  lungstemperatur bis zur Beendigung der       Farbstoffbildung    bei ungefähr 20   C; dann  wird filtriert, nach üblichem Verfahren das       Natriumsalz    hergestellt,     aasgesalzen    und ab  filtriert.  



  Der Farbstoff, ein dunkles     Pulver,    ist in  Wasser orange und in konzentrierter Schwe  felsäure hellrot löslich.



  Process for the preparation of an azo dye. The subject of the present additional patent is a process for the preparation of an azo dye, characterized in that 5-chloro-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 using the post-chrome plating process in a pure grass-green color. The dyeings are very good millfast and potting fast, very unimportant and of excellent lightfastness.

      <I> Example: </I> The diazo compound prepared by the usual method from 16.5 parts of 5-chloro-2-aminophenol is made neutral with sodium acetate and placed in a clearly acidic solution of 27.5 parts of 2- aminonaphthalene -5-sulfo-3-carboxylic acid, which was previously dissolved with 15 parts of 25% strength ammonia in 400 parts of water, mixed with 15 parts of sodium acetate and a little acetic acid, entered.

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



  The dye, a dark powder, is orange in water and light red in concentrated sulfuric acid.

Claims (1)

PATENTANSPRUCH: Verfahren zur Darstellung eines Azofarb- stoffes, dadurch gekennzeichnet, dass man 5 Chlor-2-aminophenol diazotiert und mit 2- Aminonaphtalin-5-sulfo-3-carbonsäure kup pelt. Der so erhaltene Farbstoff färbt Wolle sauer nach dem Nachchromierungsverfahren rein grasgrün. Die Färbungen sind sehr gut walk- und pottingecht, sehr egal und von ausgezeichneter Lichtechtheit. Claim: Process for the preparation of an azo dye, characterized in that 5-chloro-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, grass-green color using the post-chrome plating process. The dyeings are very good millfast and potting fast, very unimportant and of excellent lightfastness.
CH209107D 1937-12-29 1937-12-29 Process for the preparation of an azo dye. CH209107A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH209107T 1937-12-29
CH203951T 1938-06-04

Publications (1)

Publication Number Publication Date
CH209107A true CH209107A (en) 1940-03-15

Family

ID=25723989

Family Applications (1)

Application Number Title Priority Date Filing Date
CH209107D CH209107A (en) 1937-12-29 1937-12-29 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH209107A (en)

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