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CH266022A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

Info

Publication number
CH266022A
CH266022A CH266022DA CH266022A CH 266022 A CH266022 A CH 266022A CH 266022D A CH266022D A CH 266022DA CH 266022 A CH266022 A CH 266022A
Authority
CH
Switzerland
Prior art keywords
dye
sulfonic acid
monoazo dye
dissolves
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 CH266022A publication Critical patent/CH266022A/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     Monoazofarbstoffes.       Es wurde gefunden, dass ein wertvoller       Monoazofarbstoff    hergestellt werden kann,  wenn man     diazotierte        2-Amino-l-oxybenzol-4-          sulfonsäure    mit     2-Oxynaphthalin-6-sulfon-          säure-diäthylamid    vereinigt.  



  Der neue Farbstoff stellt ein violett  schwarz gefärbtes Pulver dar, das sich in       Wasser    mit bordeauxroter, in verdünnter Na  tronlauge und in     konz.    Schwefelsäure mit  orangeroter Farbe löst. Der Farbstoff färbt  Wolle aus saurem Bade in roten Tönen, die  durch     Naehchromieren    in ein licht-, walk- und       pottingechtes,    blaustichiges Bordeaux über  geführt werden.  



  Die     Diazotierung    der     2-Amino-l-oxyben-          zol-4-sulfonsäure    kann in üblicher, an sich be  kannter Weise     vorgenommen    werden. Die  Kupplung erfolgt vorzugsweise in alkalischem  Medium, z. B. so, dass man der     Diazolösung     so viel Alkali zufügt, bis sie auf Kongopapier  keine saure Reaktion mehr anzeigt, und sie  hierauf mit einer Lösung vereinigt, die aus  der Kupplungskomponente in Wasser mit Al  kalihydroxyd hergestellt wurde.

      <I>Beispiel:</I>  18,9 Teile     2-Amino-l-oxybenzol-4-sulfon-          säure    werden     in    bekannter Weise     diazotiert       und die neutralisierte     Diazolösung    mit einer  Lösung, bestehend aus 29,4 Teilen     2-Oxy        naph-          thalin-6-sulfonsäure-diäthylamid,    5 Teilen Na  triumhydroxyd und 250 Teilen Wasser bei       3     C vereinigt.     Nach    beendeter Kupplung wird  der erhaltene Farbstoff durch Zusatz von Na  t.riumchlorid vollständig abgeschieden,     abfil-          triert    und getrocknet.



  Process for the preparation of a monoazo dye. It has been found that a valuable monoazo dye can be produced by combining diazotized 2-amino-1-oxybenzene-4-sulfonic acid with 2-oxynaphthalene-6-sulfonic acid diethylamide.



  The new dye is a violet black colored powder that is dissolved in water with burgundy red, in dilute sodium hydroxide solution and in conc. Sulfuric acid dissolves with an orange-red color. The dye dyes wool from an acid bath in red tones, which are converted into a light-, mill- and potting-fast, bluish bordeaux by chroming.



  The diazotization of 2-amino-1-oxybenzene-4-sulfonic acid can be carried out in a customary manner which is known per se. The coupling is preferably carried out in an alkaline medium, e.g. B. so that one adds so much alkali to the diazo solution until it no longer shows an acidic reaction on Congo paper, and then combined it with a solution that was prepared from the coupling component in water with alkali metal hydroxide.

      <I> Example: </I> 18.9 parts of 2-amino-l-oxybenzene-4-sulfonic acid are diazotized in a known manner and the neutralized diazo solution with a solution consisting of 29.4 parts of 2-oxy naph- thalin-6-sulfonic acid diethylamide, 5 parts of sodium hydroxide and 250 parts of water at 3 C combined. After the coupling has ended, the dye obtained is completely separated off by adding sodium chloride, filtered off and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Monoazo- farbstoffes, dadurch gekennzeichnet, dass man diazotierte 2-Amino-l-oxybenzol-4-sulfonsäure mit 2-Oxynaphthalin - 6 - sulfonsäure-diäthyl- amidvereinigt. Der neue Farbstoff stellt ein violettschwarz gefärbtes Pulver dar, das sich in Wasser mit bordeauxroter, in verdünnter Natronlauge und in konz. Schwefelsäure mit orangeroter Farbe löst. PATENT CLAIM: Process for producing a monoazo dye, characterized in that diazotized 2-amino-1-oxybenzene-4-sulfonic acid is combined with 2-oxynaphthalene-6-sulfonic acid diethyl amide. The new dye is a violet-black colored powder that dissolves in water with burgundy, in dilute caustic soda and in conc. Sulfuric acid dissolves with an orange-red color. Der Farbstoff färbt Wolle aus saurem Bade in roten Tönen, die durch Nach ehromieren in ein licht-, walk- und potting- echtes, blaustichiges Bordeaux übergeführt werden. The dye dyes wool from an acid bath in red tones, which are transformed into a light-, mill- and potting-real, bluish bordeaux by honing.
CH266022D 1946-07-15 1946-07-15 Process for the preparation of a monoazo dye. CH266022A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH266022T 1946-07-15
CH261363T 1946-07-15

Publications (1)

Publication Number Publication Date
CH266022A true CH266022A (en) 1949-12-31

Family

ID=25730433

Family Applications (1)

Application Number Title Priority Date Filing Date
CH266022D CH266022A (en) 1946-07-15 1946-07-15 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH266022A (en)

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