CH172601A - Process for the preparation of a chromium-containing azo dye. - Google Patents

Process for the preparation of a chromium-containing azo dye.

Info

Publication number
CH172601A
CH172601A CH172601DA CH172601A CH 172601 A CH172601 A CH 172601A CH 172601D A CH172601D A CH 172601DA CH 172601 A CH172601 A CH 172601A
Authority
CH
Switzerland
Prior art keywords
chromium
azo dye
preparation
dye
oxynaphthalene
Prior art date
Application number
Other languages
German (de)
Inventor
Gesellschaft Fuer Chemis Basel
Original Assignee
Chem Ind Basel
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 Chem Ind Basel filed Critical Chem Ind Basel
Publication of CH172601A publication Critical patent/CH172601A/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

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

Description

  

  <B>Zusatzpatent</B> zum Hauptpatent     Nr    169698.    Verfahren zur     Herstellunm    eines     chromhaltigen        Azofarbstoffes.       Es wurde gefunden, dass man einen     chrom-          haltigen        Azofarbstoff    herstellen kann, wenn       raan    den     Azofarbstoff    aus     diazotierter     2-     Amino-l        -oxy        naphthalin-4-sulfonsäure    und       2-Oxvnaphthaliii    mit solchen Mengen Alkali  chromitlösungen behandelt,

   die auf die     cbro-          mierba.re    Truppe des     Azofarbstoffes        weniger     als ein Atom Chrom enthalten.  



  Der erhaltene     chromhaltige    Farbstoff       stellt    ein     violettschwarzes    Pulver dar, das  sich in Wasser, in 10%iger     Sodalösung,     sowie in 10 %     iger    Natronlauge mit blau  violetter Farbe löst. Er färbt Wolle aus       organiselisaurem-mineralsaurem    Bade in ma  rineblauen Tönen von vorzüglicher Echtheit.

    <I>Beispiel:</I>  20,8 Teile des     Azofarbstöffes    aus     diazo-          tierter    ?-     Amino-l-oxynaphthaIin-4-sulfon-          säure    und     2-Oxynaphthalin    werden in eine  frisch bereitete     Chromitlö        sung    eingetragen,  die durch Auflösen von 40,4 Teilen 8%iger       Chromoxydhydratpaste,    entsprechend     3,23     Teilen     Ci .,O.;,    mittelst 23,8 Teilen     Ätzkali          erhalten    wurde.

   Man erhitzt das     Reaktions-          rieinisch    6 Stunden auf 74 bis 78  , verdünnt  mit<B>2.5</B>     Teilen    Wasser und erhitzt weitere    10 Stunden auf 74 bis<B>78'.</B> Hierauf wird  mit<B>300</B> Teilen heissem Wasser     verdünnt,    von  eventuell vorhandenen ungelösten Bestand  teilen     abfiltriert,    das Filtrat mit verdünnter  Mineralsäure neutralisiert und der     chrom-          haltige    Farbstoff durch Beigabe von Koch  salz abgeschieden.



  <B> Additional patent </B> to main patent No. 169698. Process for the production of a chromium-containing azo dye. It has been found that a chromium-containing azo dye can be produced if the azo dye from diazotized 2-amino-1-oxy-naphthalene-4-sulfonic acid and 2-oxnaphthalene is treated with such amounts of alkali chromite solutions

   which on the cbromierba.re troop of the azo dye contain less than one atom of chromium.



  The chromium-containing dye obtained is a violet-black powder which dissolves in water, in 10% soda solution and in 10% sodium hydroxide solution with a blue-violet color. He dyes wool from organic-mineral acid bath in marine blue tones of excellent authenticity.

    <I> Example: </I> 20.8 parts of the azo dye from diazo- tated? - amino-1-oxynaphthaIine-4-sulfonic acid and 2-oxynaphthalene are added to a freshly prepared chromite solution, which is obtained by dissolving 40 , 4 parts of 8% chromium oxide hydrate paste, corresponding to 3.23 parts of Ci., O.;, Was obtained by means of 23.8 parts of caustic potash.

   The reaction is heated to 74 to 78 for 6 hours, diluted with 2.5 parts of water and heated to 74 to 78 'for a further 10 hours. This is followed by 300 </B> Parts of hot water are diluted, any undissolved constituents are filtered off, the filtrate is neutralized with dilute mineral acid and the chromium-containing dye is separated off by adding sodium chloride.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines chrom- haltigen Azofarbstoffes, dadurch gekenn zeichnet, dass man den Azofarbstoff aus diazotierter 2-Amino-l-oxynaphthalin-4-sul- fonsäure und 2-Oxynaphthalin mit solchen Mengen Alkalichromitlösungen behandelt, die auf die chromierbare Gruppe des Azo- farbstoffes weniger als ein Atom Chrom enthalten. PATENT CLAIM: A process for the production of a chromium-containing azo dye, characterized in that the azo dye from diazotized 2-amino-1-oxynaphthalene-4-sulfonic acid and 2-oxynaphthalene is treated with such amounts of alkali chromite solutions that correspond to the chromable group of Azo dye contain less than one atom of chromium. Der erhaltene chromhaltige Farbstoff stellt ein violettschwarzes Pulver dar, das sich in Wasser, in 10%iger Sodalösung, sowie in 10%iger Natronlauge mit blau violetter Farbe löst. Er färbt Wolle aus organischsaurem-mineralsaurem Bade in ma rineblauen Tönen von vorzüglicher Echtheit. The chromium-containing dye obtained is a violet-black powder which dissolves in water, in 10% soda solution and in 10% sodium hydroxide solution with a blue-violet color. He dyes wool from organic-mineral acid bath in marine blue tones of excellent authenticity.
CH172601D 1933-04-21 1933-04-21 Process for the preparation of a chromium-containing azo dye. CH172601A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH169698T 1933-04-21
CH172601T 1933-04-21

Publications (1)

Publication Number Publication Date
CH172601A true CH172601A (en) 1934-10-15

Family

ID=25718783

Family Applications (1)

Application Number Title Priority Date Filing Date
CH172601D CH172601A (en) 1933-04-21 1933-04-21 Process for the preparation of a chromium-containing azo dye.

Country Status (1)

Country Link
CH (1) CH172601A (en)

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