CH301643A - Process for the preparation of an acidic monoazo dye. - Google Patents

Process for the preparation of an acidic monoazo dye.

Info

Publication number
CH301643A
CH301643A CH301643DA CH301643A CH 301643 A CH301643 A CH 301643A CH 301643D A CH301643D A CH 301643DA CH 301643 A CH301643 A CH 301643A
Authority
CH
Switzerland
Prior art keywords
monoazo dye
acidic
preparation
orange
parts
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Sandoz
Original Assignee
Ag Sandoz
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 Ag Sandoz filed Critical Ag Sandoz
Publication of CH301643A publication Critical patent/CH301643A/en

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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
    • C09B29/00—Monoazo dyes prepared by diazotising and coupling
    • C09B29/24—Monoazo dyes prepared by diazotising and coupling from coupling components containing both hydroxyl and amino directing groups
    • C09B29/28—Amino naphthols
    • C09B29/30—Amino naphtholsulfonic acid

Landscapes

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

Description

  

  Verfahren zur Herstellung eines sauren     Monoazofarbstoffes.       Gegenstand des vorliegenden Patentes ist  ein Verfahren     zur    Herstellung eines sauren       Monoazofarbstoffes,    welches darin besteht,       class    man 1     Mol    der     Diazoverbindung    aus     1-          Amino        -4-methyl   <B>-,5-</B>     chlorbenzol-2    -     sulfonsäure     mit. 1     Mol        1-Oxy-6-octanoylanninonaphthaliii-          3-sulfonsäure    kuppelt.  



  Im nachfolgenden Beispiel bedeuten die  Teile Gewichtsteile.    <I>Beispiel:</I>       ?2,2    Teile     1-Amino-4-methyl-5-chlorbenzol-          ?-sulfonsäure    werden in 100 Teilen     kaltem     Wasser und 100 Teilen normaler Natrium  hydroxydlösung gelöst und mit einer     Lösung     von 7 Teilen     Natriumnitrit    in 50 'Teilen Was  ser     versetzt.    Durch Zugabe von Eis wird die  Temperatur auf     ä    .bis 10  gebracht.

   Man giesst  hierauf unter Rühren 30 Teile     konzentrierte     Salzsäure auf     einmal    zu und rührt bei 10 bis  15 , bis die     salpetrige    Säure verschwunden ist..  Hierbei scheidet sieh die     Diazoverbindung     zum Teil aus.  



  Die     Suspension    der     Diazoverbindung    wird  mit. der     wässrigen    Suspension von 36,5 Teilen       1-Oxy-6-oct-anoylaminonaphthalin        -3-sulfon-          säure    in     1;500    Teilen Wasser in Gegenwart von  überschüssigem     Natriiunbicarbonat.    bei 10 bis  15  vereinigt..  



  Nach     beendeter    Kupplung     wird    der neue  Farbstoff     ausgesalzen,        abfilti-iert    und getrock-         net.    Er     ist    .ein orangefarbenes Pulver, das  sich in Wasser mit oranger Farbe löst und  Wolle, Seide und     Polyamidfasern    aus schwach  saurem Bad in lebhaften orangen Tönen von  guter Wasch- und Schweissechtheit und sehr       guter        Lichtechtheit    färbt.



  Process for the preparation of an acidic monoazo dye. The subject of the present patent is a process for the preparation of an acidic monoazo dye, which consists in classing 1 mol of the diazo compound from 1- amino -4-methyl, 5- chlorobenzene-2-sulfonic acid with. 1 mole of 1-oxy-6-octanoylanninonaphthalene-3-sulfonic acid couples.



  In the following example, the parts are parts by weight. <I> Example: </I>? 2.2 parts of 1-amino-4-methyl-5-chlorobenzene-? -Sulphonic acid are dissolved in 100 parts of cold water and 100 parts of normal sodium hydroxide solution and a solution of 7 parts of sodium nitrite in 50 'parts water. The temperature is brought to approx. To 10 by adding ice.

   30 parts of concentrated hydrochloric acid are then poured in all at once with stirring and the mixture is stirred at 10 to 15 until the nitrous acid has disappeared. The diazo compound is partially eliminated.



  The suspension of the diazo compound is with. the aqueous suspension of 36.5 parts of 1-oxy-6-oct-anoylaminonaphthalene -3-sulfonic acid in 1,500 parts of water in the presence of excess sodium bicarbonate. united at 10 to 15 ..



  When the coupling is complete, the new dye is salted out, filtered off and dried. It is an orange powder that dissolves in water with an orange color and dyes wool, silk and polyamide fibers from a weakly acidic bath in lively orange shades of good fastness to washing and perspiration and very good fastness to light.

Claims (1)

PATENTANSPRUCH Verfahren zur Herstellung eines sauren Monoazofarbstoffes, dadurch gekennzeichnet, da.ss man 1 Mol der Diazoverbindung aus 1- Amino - 4 -methyl,- 5 - chlorbenzol-2-sulfonsäure mit 1 Mol 1-Oxy-6-octanoylaminonaphthalin- 3Lsidfonsäure kuppelt. Der neue saure Monoazofarbstoff ist ein orangefarbenes Pulver, PATENT CLAIM Process for the preparation of an acidic monoazo dye, characterized in that 1 mol of the diazo compound from 1-amino-4-methyl, -5-chlorobenzene-2-sulfonic acid is coupled with 1 mol of 1-oxy-6-octanoylaminonaphthalene-3Lsidfonic acid. The new acidic monoazo dye is an orange powder, das sich in Wasser mit oranger Farbe löst und Wolle, Seide und Polyamidfasern aus schwach saurem Bad in lebhaften orangen Tönen von guter Wasch- und Schweissechtheit und sehr guter Licht echtheit färbt. UNTERANSPRÜCHE: 1. Verfahren nach Patentanspruch, da durch gekennzeichnet, dass man die Kupplung in schwach alkalischem Medium ausführt. 2. which dissolves in water with an orange color and dyes wool, silk and polyamide fibers from a weakly acidic bath in lively orange tones of good fastness to washing and perspiration and very good fastness to light. SUBClaims: 1. Method according to claim, characterized in that the coupling is carried out in a weakly alkaline medium. 2. Verfahren nach Patentanspruch und Unteranspruch 1, dadurch gekennzeichnet, dass man als schwach alkalisches Medium ein mit 'Natriumbicarbonat alkalisch gestelltes Medium wählt. Process according to claim and dependent claim 1, characterized in that a medium made alkaline with sodium bicarbonate is selected as the weakly alkaline medium.
CH301643D 1951-11-07 1951-11-07 Process for the preparation of an acidic monoazo dye. CH301643A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH297411T 1951-11-07
CH301643T 1951-11-07

Publications (1)

Publication Number Publication Date
CH301643A true CH301643A (en) 1954-09-15

Family

ID=25733840

Family Applications (1)

Application Number Title Priority Date Filing Date
CH301643D CH301643A (en) 1951-11-07 1951-11-07 Process for the preparation of an acidic monoazo dye.

Country Status (1)

Country Link
CH (1) CH301643A (en)

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