CH172598A - 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
CH172598A
CH172598A CH172598DA CH172598A CH 172598 A CH172598 A CH 172598A CH 172598D A CH172598D A CH 172598DA CH 172598 A CH172598 A CH 172598A
Authority
CH
Switzerland
Prior art keywords
azo dye
chromium
oxynaphthalene
preparation
containing azo
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 CH172598A publication Critical patent/CH172598A/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

Description

  

  Zusatzpatent zum Hauptpatent     Nr.   <B>169698.</B>    Verfahren zur Herstellung eines     ehromhaltigen        Azofarbstoffes.       <B>Es</B> wurde gefunden,     dass    man einen chrom  haltigen     Azofarbstoff    herstellen kann, wenn  man den     Azofarbstoff    aus     diazotierter          1-Amino-2-oxynaphthalin-4-sulfonsäure    und       1-Oxynaphthalin    mit solchen Mengen     Alkali-          ehromitlösun--en    behandelt,

   die auf die     chro-          mierbare    Gruppe des     Azofarbstoffes    weniger  als ein Atom Chrom enthalten.  



  Der erhaltene     ehromhaltige        Azofarbstoff     stellt ein leicht wasserlösliches, dunkel ge  färbtes Pulver dar, das aus     organischsaurem-          schwefelsaurem    Bade Wolle in marineblauen,  sehr echten Tönen färbt.  



  <I>Beispiel:</I>  In eine     Chromitlösung,    hergestellt aus  441 Teilen einer     ffligen    frischen     Chrom-          hydroxydpaste    und 480 Teilen     90/'oigem          Kaliumhydroxyd    trägt man unter Rühren  <B>-11</B> o Teile, des     Azofarbstoffes    aus     diazotierter          1.-Amino---)-ox,vna,plithalin-4-sulfonsäure    und       1.-Oxyiiaphthalin    ein und erwärmt<B>6</B> bis<B>8</B>  Stunden auf 74 bis<B>78'.</B> Die     schwärzlich-          blaue    Schmelze wird hierauf mit Wasser ver  dünnt,

   mit verdünnter Mineralsäure neutrali  siert und nach dem     Abfiltrieren    von Ver-         unreinigungen    im Vakuum zur Trockne ver  dampft.  



  Statt im Vakuum zur Trockne zu ver  dampfen, kann auch im Vakuum konzentriert  und falls noch nicht die Gesamtmenge des  Farbstoffes ausgefallen ist, die     Abscheidung     durch Kochsalz vervollständigt werden.



  Additional patent to main patent no. <B> 169698. </B> Process for the production of an azo dye containing Ehrom. It has been found that a chromium-containing azo dye can be produced if the azo dye is made from diazotized 1-amino-2-oxynaphthalene-4-sulfonic acid and 1-oxynaphthalene with such amounts of alkali metal solution treated,

   which on the chromable group of the azo dye contain less than one atom of chromium.



  The Ehrom-containing azo dye obtained is a readily water-soluble, dark-colored powder that dyes wool from organic-acidic sulfuric acid bath in very real shades of navy blue.



  <I> Example: </I> <B> -11 </B> o parts of the azo dye are poured into a chromite solution made from 441 parts of a liquid, fresh chromium hydroxide paste and 480 parts of 90% potassium hydroxide while stirring diazotized 1.-amino ---) - ox, vna, plithalin-4-sulfonic acid and 1.-oxyiiaphthalene and heated <B> 6 </B> to <B> 8 </B> hours to 74 to <B> > 78 '. </B> The blackish-blue melt is then diluted with water,

   neutralized with dilute mineral acid and after filtering off impurities, evaporated to dryness in vacuo.



  Instead of evaporating to dryness in vacuo, it is also possible to concentrate in vacuo and, if the total amount of the dye has not yet precipitated, the deposition can be completed with common salt.

Claims (1)

PATENTANSPRUCH*, Verfahren zur Herstellung eines ehrom- haltigen Azofarbstoffes, dadurch gekenn zeichnet, dass man den Azofarbstoff aus diazotierter 1-Amino-92-oxynaphtlialin-4-sul- fonsäure und 1-Oxynaphthalin mit solchen Mengen Alkalichromitlösungen behandelt, die auf die ehromierbare Gruppe des Azo- farbstoffes weniger als ein Atom Chrom ent halten. PATENT CLAIM *, a process for the production of an azo dye containing eorom, characterized in that the azo dye from diazotized 1-amino-92-oxynaphthalene-4-sulphonic acid and 1-oxynaphthalene is treated with such amounts of alkali chromite solutions that correspond to the honorable group of the azo dye contain less than one atom of chromium. Der erhaltene cliromhaltige Azofarbstoff stellt ein leicht wasserlösliches, dunkel ge färbtes Pulver dar, das aus organischsaurem- sel-iwefelsaurem Bade Wolle in marineblauen, sehr echten Tönen färbt. The cliromine-containing azo dye obtained is a readily water-soluble, dark-colored powder which dyes wool in navy blue, very genuine shades from organic acid remnants and sulfuric acid baths.
CH172598D 1933-04-21 1933-04-21 Process for the preparation of a chromium-containing azo dye. CH172598A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH169698T 1933-04-21
CH172598T 1933-04-21

Publications (1)

Publication Number Publication Date
CH172598A true CH172598A (en) 1934-10-15

Family

ID=25718780

Family Applications (1)

Application Number Title Priority Date Filing Date
CH172598D CH172598A (en) 1933-04-21 1933-04-21 Process for the preparation of a chromium-containing azo dye.

Country Status (1)

Country Link
CH (1) CH172598A (en)

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