CH86686A - 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
CH86686A
CH86686A CH86686DA CH86686A CH 86686 A CH86686 A CH 86686A CH 86686D A CH86686D A CH 86686DA CH 86686 A CH86686 A CH 86686A
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 CH86686A publication Critical patent/CH86686A/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     chromhaltigen    sauren Farbstoffs.    Es wurde gefunden, dass man den metall  empfindlichen     Azofarbstoff    aus     diazotierter          4-Nitro-2-amido-l-oxybenzol-6-sulfonsäure    und       ss-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 flaschengrünen, walk- und lichtechten  Tönen.  



  <I>Beispiel:</I>  5 Teile     Azofarbstoffaus        diazotierter        4-Nitro-          2-amido-l-oxybenzol-6-sulfonsäure    und     @-Naph-          tylamin    werden mit 200 Teilen Wasser, 7,5       Teilen        Chromfluorid        (mit        einem        36,8        %        Crr0s     entsprechenden Chromgehalt) und 10-20  Teilen Glaspulver oder der entsprechenden  Menge eines andern säurebindenden Mittels,  wie     Natriumacetat,

          Ammoniumlaktat    und der  gleichen, während 24     Stunden    unter Rück  fluss gekocht. Es scheidet sich die Chrom-         verbindung    der Farbsäure als     schwerlöslicher     Niederschlag aus. Derselbe wird     abfiltriert,     in kalter, verdünnter Natronlauge (enthaltend  1 Teil     NaOH)    gelöst und mit Essigsäure  schwach angesäuert. Aus der intensiv grünen  Lösung wird der     Farbstoff    durch     Aussalzen     abgeschieden,     abfiltriert,    gepresst und ge  trocknet.



  Process for the preparation of an acidic dye containing chromium. It has been found that the metal-sensitive azo dye made from diazotized 4-nitro-2-amido-1-oxybenzene-6-sulfonic acid and β-naphthylamine can be converted into a chromium-containing acidic 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 bottle-green, mill-fast and light-fast shades.



  <I> Example: </I> 5 parts of azo dye from diazotized 4-nitro-2-amido-1-oxybenzene-6-sulfonic acid and @ -naphthylamine are mixed with 200 parts of water, 7.5 parts of chromium fluoride (with a 36, 8% Crr0s corresponding chromium content) and 10-20 parts 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 sparingly 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 deposited from the intensely green solution by salting out, filtered off, pressed and dried.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines chrom- haltigen sauren Farbstoffes, dadurch gekenn zeichnet, dass man den metallempfindlichen Azofarbstoff aus diazotierter 4-Nitro-2-amido- 1-oxybenzol-6-sulfonsäure und @-Naphtylamin mit chromabgebenden Mitteln behandelt. PATENT CLAIM: Process for the production of a chromium-containing acidic dye, characterized in that the metal-sensitive azo dye from diazotized 4-nitro-2-amido-1-oxybenzene-6-sulfonic acid and @ -naphthylamine is treated with chromium-releasing agents. Der Farbstoff enthält das Chrom in mas kierter Bindung, indem dasselbe aus 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 flaschengrünen, walk- ur:d lichtechten Tönen. The dye contains the chromium in a masked bond, as it is not precipitated from the aqueous solution by soda, caustic soda or ammonia, it is water-soluble, acid-resistant, not sensitive to copper and colors animal fibers from an acid bath in bottle-green, walnut: d lightfast tones.
CH86686D 1917-10-12 1917-10-12 Process for the preparation of an acidic dye containing chromium. CH86686A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH86686T 1917-10-12
CH80096T 1917-10-12

Publications (1)

Publication Number Publication Date
CH86686A true CH86686A (en) 1920-09-16

Family

ID=25702627

Family Applications (1)

Application Number Title Priority Date Filing Date
CH86686D CH86686A (en) 1917-10-12 1917-10-12 Process for the preparation of an acidic dye containing chromium.

Country Status (1)

Country Link
CH (1) CH86686A (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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