CH237396A - Process for the preparation of a new monoazo dye. - Google Patents

Process for the preparation of a new monoazo dye.

Info

Publication number
CH237396A
CH237396A CH237396DA CH237396A CH 237396 A CH237396 A CH 237396A CH 237396D A CH237396D A CH 237396DA CH 237396 A CH237396 A CH 237396A
Authority
CH
Switzerland
Prior art keywords
new
dye
preparation
yellowish
monoazo dye
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 CH237396A publication Critical patent/CH237396A/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
    • C09B29/34—Monoazo dyes prepared by diazotising and coupling from other coupling components
    • C09B29/36—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds
    • C09B29/3604—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom
    • C09B29/3647—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a five-membered ring with two nitrogen atoms as heteroatoms
    • C09B29/3652—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a five-membered ring with two nitrogen atoms as heteroatoms containing a 1,2-diazoles or hydrogenated 1,2-diazoles
    • C09B29/366—Monoazo dyes prepared by diazotising and coupling from other coupling components from heterocyclic compounds containing only a nitrogen as heteroatom containing a five-membered ring with two nitrogen atoms as heteroatoms containing a 1,2-diazoles or hydrogenated 1,2-diazoles containing hydroxy-1,2-diazoles, e.g. pyrazolone

Landscapes

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

Description

  

  Verfahren zur     Herstellung    eines neuen     llonoazofarbstoifes.       Gegenstand vorliegender Erfindung ist  ein Verfahren zur Herstellung eines neuen  sauren     Monoazofarbstoffes,        \velcher    sich zum  Färben tierischer Fasern eignet.  



  Erfindungsgemäss wird der neue Farb  stoff dadurch erhalten, dass man     p-N-Äthyl-          N-ss-ehlorpropionylaminoanilin        diazotiert    und  die erhaltene     Diazoniumverbindung    mit       22    -     Acetylamino    - 8 -     naphthol    - 6 -     sulfonsäure     kuppelt.  



  Der neue Farbstoff stellt ein     ziegelstein-          rotes    Pulver dar, das in warmem Wasser und  in konzentrierter Schwefelsäure unter Bil  dung einer     gelblichroten        Färbung    löst.  



  Der neue Farbstoff färbt Wolle aus einem  Schwefelsäure und Glaubersalz enthaltenden       Färbebad    in     gelblichroten    Farbtönen, die sich  durch sehr gute Echtheitseigenschaften gegen  starkes Waschen, Walken und Lichtechtheit  auszeichnen.  



  Die Erfindung möge an Hand des nach  stehenden Beispiels erläutert sein. Die Teile  bedeuten Gewichtsteile.         Beispiel:     22,65 Teile     p-N-Äthyl-N-ss-chlorpropionyl-          aminoanilin    werden in einem Gemisch von  300 Teilen Wasser und 25 Teilen 36%iger  Salzsäure gelöst und hierauf mit 6,9 Teilen       Natriumnitrit    versetzt.

   Die auf diese Weise  erhaltene     Diazoniumverbindung    wird all  mählich unter Rühren in ein Gemisch von  30,3 Teilen     Natrium-2-acetylamino-8-naph-          thol-6-sulfonat,    500 Teilen Wasser und  28 Teilen kristallisiertem     Natriumacetat    ein  geführt, wobei man darauf achtet, dass die       Temperatur    auf<B>10-15'</B> C gehalten     wird.     Nach vollständiger Kupplung gibt man so  viel     Natriumchlorid    hinzu, als zum Ausfäl  len des     Farbstoffes    erforderlich ist.

   Der so  erzeugte Farbstoff     wird    nun filtriert. mit  5- bis 10%iger     Kochsalzlösung        gewaschen     und getrocknet.



  Process for the preparation of a new ionoazo dye. The present invention relates to a process for the preparation of a new acidic monoazo dye which is suitable for dyeing animal fibers.



  According to the invention, the new dye is obtained by diazotizing p-N-ethyl-N-ss-ehlorpropionylaminoaniline and coupling the diazonium compound obtained with 22-acetylamino-8-naphthol-6-sulfonic acid.



  The new dye is a brick-red powder that dissolves in warm water and concentrated sulfuric acid to form a yellowish-red color.



  The new dye dyes wool from a dyebath containing sulfuric acid and Glauber's salt in yellowish-red shades, which are characterized by very good fastness properties against heavy washing, fulling and lightfastness.



  The invention may be explained using the example below. The parts mean parts by weight. Example: 22.65 parts of p-N-ethyl-N-ss-chloropropionylaminoaniline are dissolved in a mixture of 300 parts of water and 25 parts of 36% strength hydrochloric acid, and 6.9 parts of sodium nitrite are then added.

   The diazonium compound obtained in this way is gradually introduced into a mixture of 30.3 parts of sodium 2-acetylamino-8-naphthol-6-sulfonate, 500 parts of water and 28 parts of crystallized sodium acetate with stirring, being careful that the temperature is kept at <B> 10-15 '</B> C. When the coupling is complete, sodium chloride is added as much as is required to precipitate the dye.

   The dye produced in this way is then filtered. washed with 5-10% sodium chloride solution and dried.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Monoazofarbstoffes, dadurch gekennzeichnet, dass man p-N-Äthyl-N-ss-chlorpropionyl- aminoanilin diazotiert und die erhaltene Di- azoniumverbindung mit 2 - A.cetylamino - 8 - naphthol-6-sulfonsäure kuppelt. PATENT CLAIM: A process for the preparation of a new monoazo dye, characterized in that p-N-ethyl-N-ss-chloropropionyl-aminoaniline is diazotized and the diazonium compound obtained is coupled with 2-a-acetylamino-8-naphthol-6-sulfonic acid. Der neue Farbstoff stellt ein ziegelstein- rotes Pulver dar, das sich in warmem Wasser und in konzentrierter Schwefelsäure unter Bildung einer gelblichroten Färbung löst. Der neue Farbstoff färbt Wolle aus einem Schwefelsäure und Glaubersalz enthaltenden Färbebad in gelblichroten Farbtönen, die sich durch sehr gute Echtheitseigenschaften gegen starkes Waschen, Walken und Licht echtheit auszeichnen. The new dye is a brick-red powder that dissolves in warm water and concentrated sulfuric acid to form a yellowish-red color. The new dye dyes wool from a dyebath containing sulfuric acid and Glauber's salt in yellowish-red shades, which are characterized by very good fastness properties against heavy washing, fulling and light fastness.
CH237396D 1941-12-22 1942-12-21 Process for the preparation of a new monoazo dye. CH237396A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB237396X 1941-12-22
GB241241X 1941-12-24

Publications (1)

Publication Number Publication Date
CH237396A true CH237396A (en) 1945-04-30

Family

ID=26256693

Family Applications (1)

Application Number Title Priority Date Filing Date
CH237396D CH237396A (en) 1941-12-22 1942-12-21 Process for the preparation of a new monoazo dye.

Country Status (1)

Country Link
CH (1) CH237396A (en)

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