CH227978A - Process for the preparation of an azo dye. - Google Patents

Process for the preparation of an azo dye.

Info

Publication number
CH227978A
CH227978A CH227978DA CH227978A CH 227978 A CH227978 A CH 227978A CH 227978D A CH227978D A CH 227978DA CH 227978 A CH227978 A CH 227978A
Authority
CH
Switzerland
Prior art keywords
dye
parts
azo dye
preparation
brown
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 CH227978A publication Critical patent/CH227978A/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
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/38—Trisazo dyes ot the type
    • C09B35/44—Trisazo dyes ot the type the component K being a hydroxy amine
    • C09B35/46—Trisazo dyes ot the type the component K being a hydroxy amine the component K being an amino naphthol
    • C09B35/463—D being derived from diaminodiphenyl

Landscapes

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

Description

  

  Verfahren zur Herstellung eines     Azofarbstoffes.       Es wurde gefunden, dass ein     Azofarbstoff    hergestellt werden kann, wenn man den Farb  stoff der Formel  
EMI0001.0003     
    in alkalischem Medium mit     diazotiertem        4-          Chlor-6-nitro-2-amino-l-phenol    kuppelt.  



  Der neue Farbstoff stellt ein dunkles,  bronzierendes Pulver dar, das sich in Wasser  mit brauner, in konzentrierter Schwefelsäure  mit blauer Farbe löst und Baumwolle nach  dem ein- oder     zweibadigen        Nachkupferungs-          verfahren    in echten     violettbrauenTönen    färbt.

         Beispiel:     18,4     Teile        4,4'-Diaminodiphenyl    werden  in bekannter Weise     tetrazotiert    und unter  Kühlung in     natriumcarbonata-lkalischer    Lö-         sung    mit 14,5 Teilen     1-Ogybenzol-2-earbon-          säure    gekuppelt.     ,Sobald    sich keine unver  änderte     Tetrazoverbindung    mehr nachweisen  lässt, wird durch Zugabe von verdünnter Salz  säure     ganz    schwach mineralsauer gestellt.

         Alsdann    lässt     man    eine Suspension von 24,4  Teilen     2-Amino-5-ogynaphthalin-7-sulfon-          säure    in etwa 150 Teilen Wasser, 10 Tei  len     84%iger    Essigsäure     und    27 Teilen  kristallisiertem     Natriümacetat    zulaufen. Man  lässt bei Raumtemperatur rühren, bis keine       Diazoverbindung    mehr nachweisbar ist. Als  dann     stellt    man durch Zugabe von Natrium-           carbonat    alkalisch, gibt etwas Chlornatrium  hinzu und filtriert den     Disazofarbstoff    ab.

    Dieser wird unter Zusatz von 16 Teilen  30 %     iger        Natriumhydroxydlösung    und 20 Tei  len     Natriumcarbonat    in 600 Teilen Wasser  gelöst und die Lösung durch Zugabe von Fis  auf 0  gekühlt; hierauf lässt man eine aus  17 Teilen     4-Chlor-6-nitro-2-amino-1-plienol    er  haltene     Diazoverbindung    zulaufen. Nach er-         folgter    Kupplung setzt man etwa 5/o des       Gesamtvolumens    Chlornatrium zu, filtriert  den ausgefallenen     Farbstoff    ab und trock  net ihn.



  Process for the preparation of an azo dye. It has been found that an azo dye can be made using the dye of the formula
EMI0001.0003
    couples in an alkaline medium with diazotized 4-chloro-6-nitro-2-amino-1-phenol.



  The new dye is a dark, bronzing powder that dissolves in water with a brown color and in concentrated sulfuric acid with a blue color and colors cotton in real violet-brown tones using the one or two bath copying process.

         Example: 18.4 parts of 4,4'-diaminodiphenyl are tetrazotized in a known manner and, while cooling, are coupled with 14.5 parts of 1-ogybenzene-2-carboxylic acid in an alkaline sodium carbonate solution. As soon as no more unchanged tetrazo compounds can be detected, the addition of dilute hydrochloric acid is made very weakly mineral acid.

         A suspension of 24.4 parts of 2-amino-5-ogynaphthalene-7-sulfonic acid in about 150 parts of water, 10 parts of 84% acetic acid and 27 parts of crystallized sodium acetate is then run in. The mixture is left to stir at room temperature until no more diazo compound can be detected. Then make alkaline by adding sodium carbonate, add a little sodium chloride and filter off the disazo dye.

    This is dissolved in 600 parts of water with the addition of 16 parts of 30% sodium hydroxide solution and 20 parts of sodium carbonate and the solution is cooled to 0 by adding Fis; a diazo compound obtained from 17 parts of 4-chloro-6-nitro-2-amino-1-plienol is then run in. After coupling has taken place, about 5 / o of the total volume of sodium chloride is added, the dyestuff which has precipitated out is filtered off and it is dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines Azofarb- stoffes, dadurch gel@ennzeiehnet, dass man den Farbstoff der Formel EMI0002.0016 in alkalischem Medium mit diazotiertem 4- Chlor-6-nitro-2-amino-l-phenol kuppelt. PATENT CLAIM: Process for the production of an azo dye, thereby gel @ ennzeiehnet that the dye of the formula EMI0002.0016 couples in an alkaline medium with diazotized 4-chloro-6-nitro-2-amino-1-phenol. Der neue Farbstoff stellt ein dunkles, bronzierendes Pulver dar, das sich in Wasser mit brauner, in konzentrierter Schwefelsäure mit blauer Farbe löst und Baumvolle nach dem ein- oder zweibadigen Naclil@upferungs- verfahren in echten violettbraunen Tönen färbt. The new dye is a dark, bronzing powder that dissolves in water with brown, in concentrated sulfuric acid with blue color and colors tree trunks in real purple-brown tones using the one or two bath Naclil @ upferungs process.
CH227978D 1941-04-03 1941-04-03 Process for the preparation of an azo dye. CH227978A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH227978T 1941-04-03

Publications (1)

Publication Number Publication Date
CH227978A true CH227978A (en) 1943-07-31

Family

ID=4455343

Family Applications (1)

Application Number Title Priority Date Filing Date
CH227978D CH227978A (en) 1941-04-03 1941-04-03 Process for the preparation of an azo dye.

Country Status (1)

Country Link
CH (1) CH227978A (en)

Similar Documents

Publication Publication Date Title
CH227978A (en) Process for the preparation of an azo dye.
CH232825A (en) Process for the preparation of an azo dye.
CH218078A (en) Process for the production of a new azo dye.
CH199371A (en) Process for the preparation of an azo dye.
CH249788A (en) Process for the preparation of a substantive azo dye.
CH199370A (en) Process for the preparation of an azo dye.
CH292653A (en) Process for the preparation of a substantive azo dye.
CH290494A (en) Process for the preparation of an azo dye.
CH177838A (en) Process for the production of a new azo dye.
CH267296A (en) Process for the preparation of an acidic disazo dye.
CH229356A (en) Process for the preparation of a trisazo dye.
CH275080A (en) Process for the preparation of a stilbene dye.
CH292655A (en) Process for the preparation of a substantive azo dye.
CH261058A (en) Process for the preparation of a polyazo dye.
CH177839A (en) Process for the production of a new azo dye.
CH300791A (en) Process for the preparation of a disazo dye.
CH292299A (en) Process for the preparation of a monoazo dye of the pyrazolone series.
CH279522A (en) Process for the preparation of an azo dye.
CH236997A (en) Process for the production of a new azo dye.
CH292654A (en) Process for the preparation of a substantive azo dye.
CH215073A (en) Process for the preparation of an azo dye.
CH260306A (en) Process for the preparation of a disazo dye.
CH287560A (en) Process for the preparation of a monoazo dye of the pyrazolone series.
CH147697A (en) Process for the production of a new metal-containing dye.
CH313107A (en) Process for the preparation of a copper-containing polyazo dye of the stilbene series