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CH129481A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH129481A
CH129481A CH129481TA CH129481A CH 129481 A CH129481 A CH 129481A CH 129481T A CH129481T A CH 129481TA CH 129481 A CH129481 A CH 129481A
Authority
CH
Switzerland
Prior art keywords
red
azo dye
new
production
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
Priority to CH129481T priority Critical patent/CH129481A/en
Publication of CH129481A publication Critical patent/CH129481A/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

Landscapes

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

Description

  

  Verfahren zur Herstellung eines neuen     Azofarbstoffes.       Es wurde gefunden, dass man einen neuen       Azofarbstoff    erhält, wenn man das     3-Methyl-          5-pyrazolon    mit dianotierter     1-Amino-2-naph-          thol-4-sulfosäure    kuppelt und das erhaltene  Produkt mit     Fluorchrom    und hierauf mit  verdünnten Alkalien behandelt. Der neue       Farbstoff    stellt ein rotes Pulver dar, welches  sich in Wasser mit roter, in 10%iger Natron  lauge mit roter und in konzentrierter Schwe  felsäure mit oranger. Farbe löst. Er färbt  Wolle aus saurem Bade in blauroten Tönen  von vorzüglicher Lichtechtheit.  



  <I>Beispiel:</I>  In eine     Mischung    aus 10 Teilen     3-lvIethyl-          5-pyrazolon,    4 Teilen     Natriumhydroxyd,    30  Teilen Soda und 100 Teilen Wasser trägt  man bei 50 25 Teile der dianotierten     1-Amino-          2-naphthol-4-sulfosäure    ein. Man rührt bis die       Diazoverbindung    verschwunden ist, salzt aus  und filtriert.  



  36,9 Teile des so erhaltenen Farbstoffes  werden nun in 1100 Teilen Wasser kochend  gelöst, mit 22,8 Teilen Chromoxyd in Form  einer wässerigen     Fluorchromlösucig    versetzt    und unter Zusatz von Glaspulver längere  Zeit rückfliessend gekocht.  



  Die neue Chromverbindung scheidet sich  hierbei in fein kristallinischer, wasserunlös  licher Form aus. Dieselbe wird     abfiltriert,     mit Wasser gewaschen, hierauf in 500 Teilen  einer lauwarmen 1,2     o/oigen        Natriumhydro-          xydlösung    gelöst. Aus dieser Lösung gewinnt  man den nunmehr löslichen Farbstoff durch  schwaches Ansäuern mit Essigsäure und  Aussahen. Dieser stellt getrocknet ein blau  rotes Pulver dar, löst sich in Wasser mit  roter, in     10o/oiger    Natronlauge mit roter, in  konzentrierter Schwefelsäure mit oranger  Farbe und färbt Wolle, vorzugsweise aus  schwefelsaurem Färbebade, in blauroten Tönen  von vorzüglichen Echtheitseigenschaften an.



  Process for the production of a new azo dye. It has been found that a new azo dye is obtained if the 3-methyl-5-pyrazolone is coupled with dianotated 1-amino-2-naphthol-4-sulfonic acid and the product obtained is treated with fluorochrome and then with dilute alkalis. The new dye is a red powder, which is dissolved in water with red, in 10% sodium hydroxide with red and in concentrated sulfuric acid with orange. Color dissolves. It dyes wool from an acid bath in blue-red shades of excellent lightfastness.



  <I> Example: </I> In a mixture of 10 parts of 3-ivethyl-5-pyrazolone, 4 parts of sodium hydroxide, 30 parts of soda and 100 parts of water, 50 25 parts of the dianotated 1-amino-2-naphthol 4-sulfonic acid. The mixture is stirred until the diazo compound has disappeared, salted out and filtered.



  36.9 parts of the dye thus obtained are then dissolved in 1100 parts of boiling water, 22.8 parts of chromium oxide in the form of an aqueous fluorochrome solution are added and the mixture is refluxed for a long time with the addition of glass powder.



  The new chromium compound is deposited in a finely crystalline, water-insoluble form. The same is filtered off, washed with water, then dissolved in 500 parts of a lukewarm 1.2% sodium hydroxide solution. The dye, which is now soluble, is obtained from this solution by weakly acidifying with acetic acid and looking. When dried, this is a blue-red powder, dissolves in water with red, in 10% sodium hydroxide solution with red, in concentrated sulfuric acid with orange color and dyes wool, preferably from sulfuric acid dyebath, in blue-red shades with excellent fastness properties.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man das 3-1fIethyl-5-pyrazolon mit dianotier ter 1-Amino-2-naphthol-4-sulfosäure kuppelt und das erhaltene Produkt mit Fluorchrom und hierauf -mit verdünnten Alkalien be handelt. Der neue Farbstoff stellt ein rotes Pulver dar, welches sich in Wasser mit roter, in 10o/oiger Natronlauge mit roter und in konzentrierter Schwefelsäure mit oranger Farbe löst. Er färbt Wolle aus saurem lade in blauroten Tönen von vorzüglicher Licht echtheit. PATENT CLAIM: A process for the preparation of a new azo dye, characterized in that the 3-1fIethyl-5-pyrazolone is coupled with dianotier ter 1-amino-2-naphthol-4-sulfonic acid and the product obtained is treated with fluorochrome and alkalis diluted with it acts. The new dye is a red powder, which dissolves in water with red, in 10% sodium hydroxide solution with red and in concentrated sulfuric acid with orange color. It dyes wool from sour lade in blue-red tones with excellent lightfastness.
CH129481T 1926-12-24 1926-12-24 Process for the production of a new azo dye. CH129481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH129481T CH129481A (en) 1926-12-24 1926-12-24 Process for the production of a new azo dye.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH129481T CH129481A (en) 1926-12-24 1926-12-24 Process for the production of a new azo dye.
CH127260T 1926-12-24

Publications (1)

Publication Number Publication Date
CH129481A true CH129481A (en) 1928-12-17

Family

ID=25710824

Family Applications (1)

Application Number Title Priority Date Filing Date
CH129481T CH129481A (en) 1926-12-24 1926-12-24 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH129481A (en)

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