CH86687A - Process for preparing a chromium-containing acidic dye. - Google Patents

Process for preparing a chromium-containing acidic dye.

Info

Publication number
CH86687A
CH86687A CH86687DA CH86687A CH 86687 A CH86687 A CH 86687A CH 86687D A CH86687D A CH 86687DA CH 86687 A CH86687 A CH 86687A
Authority
CH
Switzerland
Prior art keywords
chromium
dye
acid
containing acidic
preparing
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 CH86687A publication Critical patent/CH86687A/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)
  • Manufacture And Refinement Of Metals (AREA)

Description

Verfahren zur Herstellung Bines chromhaltigen sauren Farbstoffs. Es wurde gefunden, daG man den inetall- empfindlichen Azofarbstoff ans diazotiertem 5-Nitro-2-amido-1-oxybenzol und der N-1VIethy- lensulfosâure der 2-Aminonaphtalin-6-sulfo- sâ.ure durch Behandlung mit chroinabgeben- den Mitteln in einen chromhaltigen sauren Farbstoff überführen kami, welcher das Chrom in maskierter Bindung enthâlt, indem das- selbe aus der wâsserigen LSsung durch Soda, Natronlauge Oder Ammoniak nicht gefâllt wird. Der Farbstoff ist wasserlbslich, süure- bestândig, nicht kupferempfindlich und fürbt animalische Fasern aus saurera Bad in blau- atichiggrünen, walk- und lichtechten Tünen. Beispiel: 5 Teile Azofarbstoff aus diazotiertern 5-Nitro-2-amido-1-oxybenzol und der N-Me- thylensulfosâureder 2-Aminonaphtalin-6-sulfo- sâure werden mit 200 Teilen Wasser, 7,5 Teilen Chromfluorid (mit einem <B>36,8010</B> Crz0s entsprechenden Chromgehalt) und 10-20 Teilen Glaspulver oder der entsprechenden Menge Bines andern sâurebindenden Mittels, wie Natriumacetat, Ammoniumlaktat und der- gleichen, wâhrend 24 Stunden unter Rück- flue gekocht. Es scheidet sich die Chrom- verbindung der Farbsliure als schwerlüslicher Niedersclilag aus. Derselbe wird abfiltriert, in kalter, verdünnter Natronlauge (enthaltend 1 Teil NaOH) geldst und mit Essigsaure schwach angesâuert. Aus der intensiv grünen L < jsung wird der Farbstoff durch Aussalzen abgescliieden, abfiltriert, gepreet und ge- trocknet. Process for preparing a chromium-containing acidic dye. It has been found that the metal-sensitive azo dye can be converted to diazotized 5-nitro-2-amido-1-oxybenzene and N-1-ethylenesulfonic acid of 2-aminonaphthalene-6-sulfonic acid by treatment with chrominating agents converted into a chromium-containing acidic dye kami, which contains the chromium in a masked bond, by not precipitating the same out of the aqueous solution with soda, caustic soda or ammonia. The dye is water-soluble, acid-resistant, not sensitive to copper and dyes animal fibers from acidic baths in bluish-green, milled and lightfast tones. Example: 5 parts of an azo dye made from diazotized 5-nitro-2-amido-1-oxybenzene and N-methylene sulfosaureh of 2-aminonaphthalene-6-sulfosaur are mixed with 200 parts of water, 7.5 parts of chromium fluoride (with a <B >36.8010</B> Crz0s corresponding chromium content) and 10-20 parts of glass powder or the corresponding amount of some other acid-binding agent, such as sodium acetate, ammonium lactate and the like, boiled under reflux for 24 hours. The chromium compound of the colored acid separates out as a hard-to-dissolve precipitate. The same is filtered off, washed in cold, diluted sodium hydroxide solution (containing 1 part NaOH) and slightly acidified with acetic acid. The dye is separated from the intensively green solution by salting out, filtered off, pressed and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung Bines chrom- haltigen sauren Farbstoffes, dadurch gekenn- zeichnet, daG man den metallempfindlichen Azofarbstoff aus diazotiertem 5-Nitro-2-amido- i-oxybenzol und der N-Methylensulfosâure der 2-Aminonaphtalin-6-sulfosâure mit chrom- abgebenden Mitteln behandelt. Der Farbstoff enthâlt das Chrom in mas- kierter Bindung, indem dasselbe aus der wüs- serigen Lüsung durch Soda, Natronlauge oder Ammoniak nicht gefâllt wird, ist wasserlüs- lich, sâurebestündig, nicht kupferempfindlich und fârbt animalisclie Fasern ans saurera Bad in blaustichig grünen, walk- und licht- echten Tiinen. PATENT CLAIM: Process for the production of a chromium-containing acidic dye, characterized in that the metal-sensitive azo dye is prepared from diazotized 5-nitro-2-amido-i-oxybenzene and the N-methylenesulphonic acid of 2-aminonaphthalene-6-sulphonic acid with chromium - Dealing funds treated. The dye contains the chromium in a masked bond, in that the same is not precipitated from the aqueous solution by soda, caustic soda or ammonia, is water-soluble, acid-resistant, not sensitive to copper and dyes animal fibers in the acidic bath in bluish green, full - and light-real shades.
CH86687D 1917-10-12 1917-10-12 Process for preparing a chromium-containing acidic dye. CH86687A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH86687T 1917-10-12
CH80096T 1917-10-12

Publications (1)

Publication Number Publication Date
CH86687A true CH86687A (en) 1920-09-16

Family

ID=25702628

Family Applications (1)

Application Number Title Priority Date Filing Date
CH86687D CH86687A (en) 1917-10-12 1917-10-12 Process for preparing a chromium-containing acidic dye.

Country Status (1)

Country Link
CH (1) CH86687A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1006988B (en) * 1954-03-05 1957-04-25 Geigy Ag J R Process for the production of chromium-containing azo dyes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1006988B (en) * 1954-03-05 1957-04-25 Geigy Ag J R Process for the production of chromium-containing azo dyes
DE1006988C2 (en) * 1954-03-05 1957-10-03 Geigy Ag J R Process for the production of chromium-containing azo dyes

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