CH198887A - Process for the preparation of a monoazo dye. - Google Patents

Process for the preparation of a monoazo dye.

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Publication number
CH198887A
CH198887A CH198887DA CH198887A CH 198887 A CH198887 A CH 198887A CH 198887D A CH198887D A CH 198887DA CH 198887 A CH198887 A CH 198887A
Authority
CH
Switzerland
Prior art keywords
preparation
monoazo dye
amino
dye
azo
Prior art date
Application number
Other languages
German (de)
Inventor
Aktiengesellsc Farbenindustrie
Original Assignee
Ig Farbenindustrie Ag
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 Ig Farbenindustrie Ag filed Critical Ig Farbenindustrie Ag
Publication of CH198887A publication Critical patent/CH198887A/en

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Description

  

  Verfahren zur Herstellung eines     Nonoazofarbstoffes.       Gegenstand des vorliegenden     Patentes    ist  ein Verfahren zur     Herstellung    eines     Mono-          azofarbstoffes.    Das Verfahren ist     daduroh     gekennzeichnet, dass man     diazotiertes        2-Chlor-          anilin    mit     1-Amino-7-oxynaphthalin    in saurer  Lösung kuppelt.  



  Der erhaltene neue     Monoazofarbstoff          4-(2'-Chlorbenzol)-azo-l-amino-7-oxynaphtha-          lin        ist    in Wasser unlöslich, löst sich in ver  dünnten Alkalien und besitzt eine     .gute    Affi  nität zur Faser.  



  <I>Beispiel:</I>  In eine eiskalte Lösung von     1-Amino-7-          oxynaphthalin    wird die in     bekannter    Weise  aus     2-Chloranilin        hergestellte        Diazolösung          eingerührt.    wobei man dafür Sorge trägt,       class    die Lösung schwach kongosauer reagiert.    Der Farbstoff fällt in guter     Ausbeute    an.  Er löst sich rotbraun in Natronlauge.     .Sub-          stantivität    auf Baumwolle: 25%.



  Process for the preparation of a nonoazo dye. The present patent relates to a process for the preparation of a monoazo dye. The process is characterized by coupling diazotized 2-chloro aniline with 1-amino-7-oxynaphthalene in acidic solution.



  The new monoazo dye obtained, 4- (2'-chlorobenzene) -azo-1-amino-7-oxynaphthalene, is insoluble in water, dissolves in dilute alkalis and has a good affinity for fibers.



  <I> Example: </I> The diazo solution prepared in a known manner from 2-chloroaniline is stirred into an ice-cold solution of 1-amino-7-oxynaphthalene. taking care that the solution reacts weakly acidic to the Congo. The dye is obtained in good yield. It dissolves red-brown in caustic soda. . Substantivity on cotton: 25%.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines MoDo- azofarbstoffes, dadurch gekennzeichnet, dass man diazotiertes 2-Chloranilin mit 1-Amino- 7-oxyna;phthalin in saurer Lösung kuppelt. Der erhaltene neue Monoazofarbstoff 4-(2'-Chlorbenzol)-azo-l-amino-7-oxynaphtha- lin ist in Wasser unlöslich, löslich in ver dünnten Alkalien und besitzt eine gute Affi nität zur Faser. PATENT CLAIM: Process for the production of a MoDo azo dye, characterized in that diazotized 2-chloroaniline is coupled with 1-amino-7-oxyna; phthalene in acidic solution. The new monoazo dye 4- (2'-chlorobenzene) -azo-1-amino-7-oxynaphthalin obtained is insoluble in water, soluble in dilute alkalis and has a good affinity for fibers.
CH198887D 1935-08-16 1936-07-30 Process for the preparation of a monoazo dye. CH198887A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE198887X 1935-08-16
CH194455T 1936-07-30

Publications (1)

Publication Number Publication Date
CH198887A true CH198887A (en) 1938-07-15

Family

ID=25722680

Family Applications (1)

Application Number Title Priority Date Filing Date
CH198887D CH198887A (en) 1935-08-16 1936-07-30 Process for the preparation of a monoazo dye.

Country Status (1)

Country Link
CH (1) CH198887A (en)

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