CH86685A - Process for the preparation of an acidic dye containing chromium. - Google Patents

Process for the preparation of an acidic dye containing chromium.

Info

Publication number
CH86685A
CH86685A CH86685DA CH86685A CH 86685 A CH86685 A CH 86685A CH 86685D A CH86685D A CH 86685DA CH 86685 A CH86685 A CH 86685A
Authority
CH
Switzerland
Prior art keywords
chromium
acid
dye
preparation
acidic dye
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 CH86685A publication Critical patent/CH86685A/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B45/00Complex metal compounds of azo dyes
    • C09B45/02Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/14Monoazo compounds
    • C09B45/16Monoazo compounds containing chromium

Description

  

  Verfahren zur Herstellung eines     ebromhaltigen    sauren Farbstoff.    Es wurde gefunden, dass     tnan    den metall  empfindlichen     Azofarbstoff    aus     diazotierter          6-Nitro-2-amido-l-oxybenzol-4-sulfonsäure    und       P-Naphtylamin    durch Behandlung mit chrom  abgebenden Mitteln in einen chromhaltigen  sauren Farbstoff überführen kann, welcher  das Chrom in     maskierter    Bindung enthält,  indem dasselbe aus der wässerigen Lösung  durch Soda, Natronlauge oder Ammoniak  nicht gefällt wird. Der Farbstoff ist wasser  löslich, säurebeständig, nicht kupferempfind  lich und färbt animalische Fasern aus saurem  Bad in grünen, walk- und lichtechten Tönen.

    <I>Beispiel:</I>  5 Teile     Azofarbstoff    aus     diazotierter          6.Nitro-2-amido-l-oxybenzol-4-sulfonsäure    und       @-Naphtylamitt    werden     tnit    200 Teilen Was  ser, 7,5 Teilen     Chromfluorid        (tnit    einem     36,8'/'o          Cra    Os entsprechenden Chromgehalt) und 10  bis 20 Teilen Glaspulver oder der entspre  chenden Menge eines andern     säurebindenden     Mittels, wie     Natriumacetat,        Ammoniumlaktat     und dergleichen,

   während 24 Stunden unter       Rückfluss    gekocht. Es scheidet sich die lUhrom-         verbindung    der Farbsäure als     schwerlöslichet-          Niederschlag    aus. Derselbe wird     abfiltriert,     in kalter verdünnter Natronlauge (enthaltend  1 Teil     NaOH)    gelöst und     tnit        Essigsäure     schwach     angesäuert.    Aus der intensiv grünen  Lösung wird der Farbstoff durch     Aussalzen    ab  geschieden,     abfiltriert,    gepresst und getrocknet.



  Process for the preparation of an ebromine-containing acidic dye. It has been found that tnan can convert the metal-sensitive azo dye from diazotized 6-nitro-2-amido-1-oxybenzene-4-sulfonic acid and p-naphthylamine into a chromium-containing acid dye by treatment with chromium-releasing agents, which masked the chromium Binding contains, in that the same is not precipitated from the aqueous solution by soda, caustic soda or ammonia. The dye is water-soluble, acid-resistant, not sensitive to copper and dyes animal fibers from an acid bath in green, mill-fast and light-fast shades.

    <I> Example: </I> 5 parts of azo dye from diazotized 6th nitro-2-amido-1-oxybenzene-4-sulfonic acid and @ -naphthylamide are mixed with 200 parts of water, 7.5 parts of chromium fluoride (with a 36, 8 '/' o Cra Os corresponding chromium content) and 10 to 20 parts of glass powder or the corresponding amount of another acid-binding agent, such as sodium acetate, ammonium lactate and the like,

   refluxed for 24 hours. The chromium compound of the color acid separates out as a poorly soluble precipitate. The same is filtered off, dissolved in cold, dilute sodium hydroxide solution (containing 1 part NaOH) and weakly acidified with acetic acid. The dye is separated from the intensely green solution by salting out, filtered off, pressed and dried.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines chrom- lialtigen sauren Farbstoffes, dadurch gekenn zeichnet, dass man den metallempfindlichen Azofarbstoff aus diazotierter 6-Nitro 2-anticlo- 1-oxybetizol-4-sulfottsäure und 13-Naphtylamin mit chromabgebenden ATitteln behandelt. PATENT CLAIM: Process for the production of a chromium-containing acidic dye, characterized in that the metal-sensitive azo dye from diazotized 6-nitro, 2-anticlo-1-oxybetizole-4-sulfottic acid and 13-naphthylamine is treated with chromium-releasing agents. Der Farbstoff enthält das Chrom in mas kierter Bindung, indem dasselbe ans der wässerigen Lösung durch Soda, Natronlauge oder Ammoniak nicht gefällt wird, ist wasser löslich, säurebeständig, nicht kupferempfind lich und färbt animalische Fasern aus saurem Bad in grünen, walk- und lichtechten Tönen. The dye contains the chromium in a masked bond, as it is not precipitated in the aqueous solution by soda, caustic soda or ammonia, is water-soluble, acid-resistant, not sensitive to copper and dyes animal fibers from an acidic bath in green, whip and lightfast shades .
CH86685D 1917-10-12 1917-10-12 Process for the preparation of an acidic dye containing chromium. CH86685A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH80096T 1917-10-12
CH86685T 1917-10-12

Publications (1)

Publication Number Publication Date
CH86685A true CH86685A (en) 1920-09-16

Family

ID=25702626

Family Applications (1)

Application Number Title Priority Date Filing Date
CH86685D CH86685A (en) 1917-10-12 1917-10-12 Process for the preparation of an acidic dye containing chromium.

Country Status (1)

Country Link
CH (1) CH86685A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE928901C (en) * 1951-10-04 1955-06-13 Ciba Geigy Process for the production of azo dyes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE928901C (en) * 1951-10-04 1955-06-13 Ciba Geigy Process for the production of azo dyes

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