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CH222998A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH222998A
CH222998A CH222998DA CH222998A CH 222998 A CH222998 A CH 222998A CH 222998D A CH222998D A CH 222998DA CH 222998 A CH222998 A CH 222998A
Authority
CH
Switzerland
Prior art keywords
dye
azo dye
preparation
red
bath
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 CH222998A publication Critical patent/CH222998A/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

  

      Terfahren    zur     Rerstellung    eines     Azofarbstoffes.       Gegenstand des vorliegenden Zusatz  patentes ist ein Verfahren zur Herstellung  eines     Azofarbstoffes,    dadurch gekennzeich  net,     dass        diazotiertes        4,6-Dichlor-2-amino-l-          oxybenzol    mit     1-Oxynaphthalin-4-sulfon-          säureamid-(N-methylenearbonsäiire)    gekup  pelt wird.  



  <I>Beispiel:</I>       23,5    Teile     4,6-Dichlor-2-amino-l-oxyben-          zol    werden     diazotiert,        die'Diazoverbindung     mit     Natriumbikarbonat    gegen Kongopapier  neutral gestellt und in eine Lösung von  <B>29,9,</B> Teilen     1-Oxynaphthalin-4-sulfonsäure-          amid-(N-methylenearbonsäure)    und 20 Tei  len wasserfreier Soda in<B>180</B> Teilen Wasser  gegossen. Zur Beschleunigung der Kupp  lung werden noch<B>28</B> Teile     Pyridin    zugefügt.

    Nach     ca.   <B>50</B> Stunden ist die     Farbstoffbil-          dung    beendet. Nach Aufheizen auf<B>60'</B> wird  der Farbstoff durch Zugabe von Kochsalz  vollkommen ausgefällt, filtriert und ge  trocknet.    Er bildet ein     dunkelviolettes    Pulver, das  Wolle aus saurem Bad in roten,     nachchro-          miert    in sehr reinen,     rotstichig    violetten Tö  nen von sehr guter Lichtechtheit und her  vorragenden     Nassechtheiten    färbt. Der neue  Farbstoff eignet sich auch sehr gut zum  Färben nach dem     Einbadehromierverfahren.  



      Terfahren for the preparation of an azo dye. The subject matter of the present additional patent is a process for the production of an azo dye, characterized in that diazotized 4,6-dichloro-2-amino-l-oxybenzene is coupled with 1-oxynaphthalene-4-sulfonic acid amide (N-methylenearboxylic acids) becomes.



  <I> Example: </I> 23.5 parts of 4,6-dichloro-2-amino-1-oxyben- zene are diazotized, the diazo compound is neutralized with sodium bicarbonate against Congo paper and poured into a solution of 29, 9 parts of 1-oxynaphthalene-4-sulfonic acid amide (N-methylene carboxylic acid) and 20 parts of anhydrous soda are poured into 180 parts of water. To accelerate the coupling, 28 parts of pyridine are added.

    The formation of the dye has ended after approx. 50 hours. After heating to <B> 60 '</B>, the dye is completely precipitated by adding sodium chloride, filtered and dried. It forms a dark violet powder that dyes wool from an acid bath in red, after-chroming in very pure, reddish violet tones of very good lightfastness and excellent wet fastness properties. The new dye is also very suitable for dyeing using the single-bath homing method.

Claims (1)

PATENTA-NSPRUCH: Verfahren zur Herstellung eines Azo- farbstoffes, dadurch gekennzeichnet, dass di- azotiertes 4,6-Dichlor-2-amino-l-oxybeiizol mit 1-Oxynaphthalin-4-sulfonsbureamid-(N- metllylenearbonsäure) gekuppelt wird. PATENTA-NSPRUCH: Process for the production of an azo dye, characterized in that diazoated 4,6-dichloro-2-amino-1-oxybeiizole is coupled with 1-oxynaphthalene-4-sulfonsbureamide (N-methylene arboxylic acid). Der neue Farbstoff stellt nach dem Trocknen ein dunkelviolettes Pulver dar, das Wolle aus saurem Bad in roten, nachehro- miert in sehr reinen, rotstiellig violetten Tö nen von sehr guter Lichtechtheit und her vorragenden Nassechtheiten färbt. Der neue Farbstoff eignet sich auch sehr gut zum Färben nach dem Einbadehromierverfahren. After drying, the new dye is a dark violet powder that dyes wool from an acid bath in red, after-chromed in very pure, red-tinged violet tones with very good lightfastness and excellent wet fastness properties. The new dye is also very suitable for dyeing using the single-bath homing method.
CH222998D 1941-01-15 1941-01-15 Process for the preparation of an azo dye. CH222998A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH219933T 1941-01-15
CH222998T 1941-01-15

Publications (1)

Publication Number Publication Date
CH222998A true CH222998A (en) 1942-08-15

Family

ID=25726376

Family Applications (1)

Application Number Title Priority Date Filing Date
CH222998D CH222998A (en) 1941-01-15 1941-01-15 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH222998A (en)

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