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CH177820A - Process for the production of a new azo dye. - Google Patents

Process for the production of a new azo dye.

Info

Publication number
CH177820A
CH177820A CH177820DA CH177820A CH 177820 A CH177820 A CH 177820A CH 177820D A CH177820D A CH 177820DA CH 177820 A CH177820 A CH 177820A
Authority
CH
Switzerland
Prior art keywords
dye
azo dye
parts
production
new azo
Prior art date
Application number
Other languages
German (de)
Inventor
Limited Imperial Ch Industries
Original Assignee
Ici Ltd
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 Ici Ltd filed Critical Ici Ltd
Publication of CH177820A publication Critical patent/CH177820A/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
    • C09B43/00—Preparation of azo dyes from other azo compounds
    • 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
    • C09B29/32—Monoazo dyes prepared by diazotising and coupling from coupling components containing a reactive methylene group
    • 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
    • C09B43/00—Preparation of azo dyes from other azo compounds
    • C09B43/08—Preparation of azo dyes from other azo compounds by reduction

Landscapes

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

Description

  

      Zusatzpatent    zum Hauptpatent Nr. 173064.    Verfahren zur Herstellung eines neuen     Azofarbstoffes.       Gegenstand der vorliegenden Erfindung  ist ein     Verfahren    zur Herstellung eines neuen       Azofarbstoffes    für Wolle oder Seide, welcher  der     Lactamisation    auf der Faser zur Er  reichung kräftig roter Töne fähig ist.  



  Das Verfahren gemäss der Erfindung  zeichnet sich dadurch aus, dass man     2-Nitro-          4-aminophenyl-l-thioglycolsäure    dianotiert, die       Diazoverbindung    mit     acetoessigsaurem        p-Ani-          sidid    kuppelt und den resultierenden     Nitro-          azofarbstoff    zu dem entsprechenden     Amino-          azofarbstoff    reduziert.  



  <I>Beispiel</I>  11,5 Teile     2-Nitro-4-aminophenylthiogly-          colsäure    werden in 133 Teilen 2     o/oiger    eis  kalter     Natriumcarbonatlösung    aufgelöst.  Hierauf werden 3,45 Teile     Natriumnitrit    und  sodann 15,2 Teile 36     o%iger        Ohlorwasseratoff-          säure    zugesetzt.

   Nach einer halben Stunde  ist die Dianotierung vollständig und lässt  man die kalte     Diazolösung    in eine Lösung  ablaufen, welche 9,7 Teile     acetoessigsaurem            p-Anisidid    in 12,5 Teilen wässerigem Ätz  natron 70 o     Tw.    und 1000 Teile Wasser ent  hält. Nach einstündigem Umrühren ist die  Kupplung vollständig und die     Nitroazover-          bindung    wird durch Zusatz von 240 Teilen  Salz gefällt. Die     Nitroazoverbindung    wird       abfiltriert    und mit 400 Teilen Wasser bei  50          C umgerührt.

   Alsdann werden 18 Teile  kristallisiertes     Natriumsulfid    zugesetzt und  das Gemisch bei 50 o C 2-4 Stunden um  gerührt. Wenn die Reduktion vollständig ist,  werden 60 Teile Salz zugesetzt und wird  der gefällte gelbe Farbstoff     abgefiltert.    Er  kann als Teig aufbewahrt oder getrocknet  werden.  



  Er färbt Wolle oder Seide in gelben  Tönen, welche nach Behandlung mit ver  dünnter Säure     (Lactamisation    des     Farbstoffes)     sehr waschbeständig sind.



      Additional patent to main patent no. 173064. Process for the production of a new azo dye. The present invention relates to a process for the preparation of a new azo dye for wool or silk which is capable of lactamization on the fiber to achieve strong red tones.



  The process according to the invention is characterized in that 2-nitro-4-aminophenyl-1-thioglycolic acid is dianotated, the diazo compound is coupled with acetoacetic acid p-anisidide and the resulting nitro azo dye is reduced to the corresponding amino azo dye.



  <I> Example </I> 11.5 parts of 2-nitro-4-aminophenylthioglycolic acid are dissolved in 133 parts of 2% ice-cold sodium carbonate solution. 3.45 parts of sodium nitrite and then 15.2 parts of 36% strength hydrochloric acid are then added.

   After half an hour the dianotization is complete and the cold diazo solution is allowed to run off into a solution which contains 9.7 parts of acetoacetic acid p-anisidide in 12.5 parts of aqueous caustic soda 70 o part and 1000 parts of water. After stirring for one hour, the coupling is complete and the nitroazo compound is precipitated by adding 240 parts of salt. The nitroazo compound is filtered off and stirred with 400 parts of water at 50.degree.

   Then 18 parts of crystallized sodium sulfide are added and the mixture is stirred at 50 ° C. for 2-4 hours. When the reduction is complete, 60 parts of salt are added and the precipitated yellow dye is filtered off. It can be stored as a dough or dried.



  It dyes wool or silk in yellow tones, which are very washable after treatment with dilute acid (lactamization of the dye).

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Azofarbstoffes, dadurch gekennzeichnet, dass man 2-Nitro-4-aminophenyl-l-thioglycolsäure dianotiert; die Diazoverbindung mit aceto- essigsaurem p-Anisidid kuppelt und den resultierenden Nitroazofarbstoff zu dem ent sprechenden Aminoazofarbstoff reduziert. Der neue Farbstoff färbt Wolle oder Seide in gelben Tönen, welche nach Behandlung mit verdünnter Säure (Laotamisation des Farb stoffes) sehr waschbeständig sind. Claim: Process for the preparation of a new azo dye, characterized in that 2-nitro-4-aminophenyl-1-thioglycolic acid is dianotized; the diazo compound couples with aceto-acetic acid p-anisidide and reduces the resulting nitroazo dye to the corresponding aminoazo dye. The new dye dyes wool or silk in yellow tones, which are very washable after treatment with dilute acid (laotamization of the dye).
CH177820D 1934-02-08 1934-02-08 Process for the production of a new azo dye. CH177820A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH177820T 1934-02-08
CH173064T 1934-10-03

Publications (1)

Publication Number Publication Date
CH177820A true CH177820A (en) 1935-06-15

Family

ID=25719310

Family Applications (1)

Application Number Title Priority Date Filing Date
CH177820D CH177820A (en) 1934-02-08 1934-02-08 Process for the production of a new azo dye.

Country Status (1)

Country Link
CH (1) CH177820A (en)

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