CH189035A - Process for the preparation of a water-soluble monoazo dye. - Google Patents

Process for the preparation of a water-soluble monoazo dye.

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Publication number
CH189035A
CH189035A CH189035DA CH189035A CH 189035 A CH189035 A CH 189035A CH 189035D A CH189035D A CH 189035DA CH 189035 A CH189035 A CH 189035A
Authority
CH
Switzerland
Prior art keywords
water
dye
preparation
monoazo dye
soluble monoazo
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 CH189035A publication Critical patent/CH189035A/en

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Description

  

  Verfahren zur Herstellung eines wasserlöslichen     Nonoazofarbstoffes.       Im Hauptpatent ist ein Verfahren be  schrieben, ,gemäss welchem ein neuer, wasser  löslicher, besonders zum Färben von     Acetat-          5eide    wertvoller     Monoazofarbstoff    durch  Kuppeln von     @diazotiertem        p-Nitra.nilin    mit  dem     Natriumsa.lz    des     Phenyltaurins,    in wäs  seriger     Natriumkarbonatlösungerhalten        wird.     



  Gemäss vorliegender     Abänderung    jenes  Verfahrens wird ein wasserlöslicher, beson  ders zum Färben von     Acetatseide    wertvoller       Monoazofarbstoff    dadurch     hergestellt,    dass  man     diazotiertes        2-Chlor-4-nitranilin    mit       Phenyltaurin    kuppelt.  



       Beispiel:     Eine Suspension von 172,5 Teilen     2-Chlor-          4-nitranilin    in 11000 Teilen Wasser und<B>1100</B>  Teilen 10     %        iger    Salzsäure wird durch Zu  fügen von 69 Teilen     Natriumnitrit        diazotiert.     Die auf 5   C     gekühlte        Diazolösung    wird zu  einer eiskalten     Lösung    von 223 Teilen des       Natriumsalzes    von     Phenyltaurin    in 4000  Teilen Wasser,     welches    260 Teile Natrium  karbonat enthält,

       gesetzt.    Die Kupplung  vollzog sich rasch. Nach ihrer Vollendung    erwärmt man das Kupplungsgemisch auf  65   C und     sondert    den     Farlastoff    durch     Gus-          salzen    und Filtrieren ab. Der neue Farb  stoff bildet ein braunes Pulver, welches mit  warmem     Wasser    eine     rötlich-.gelbe,    mit kon  zentrierter Schwefelsäure eine     orangebraune     Lösung gibt.

   In neutraler, 1     %    Salz enthal  tender     Flotte    färbt der neue Farbstoff       Acetatseide    in     orangegelben        Tönen.  



  Process for the preparation of a water-soluble nonoazo dye. The main patent describes a process according to which a new, water-soluble monoazo dye, particularly valuable for dyeing acetate 5eide, is obtained by coupling @diazotized p-Nitra.niline with the sodium salt of phenyltaurine in aqueous sodium carbonate solution.



  According to the present modification of that process, a water-soluble monoazo dye, which is particularly valuable for dyeing acetate silk, is produced by coupling diazotized 2-chloro-4-nitroaniline with phenyltaurine.



       Example: A suspension of 172.5 parts of 2-chloro-4-nitroaniline in 11,000 parts of water and 1,100 parts of 10% hydrochloric acid is diazotized by adding 69 parts of sodium nitrite. The diazo solution, cooled to 5 C, becomes an ice-cold solution of 223 parts of the sodium salt of phenyltaurine in 4000 parts of water, which contains 260 parts of sodium carbonate,

       set. The coupling took place quickly. When this is complete, the coupling mixture is heated to 65 ° C. and the dye is separated off by casting salts and filtering. The new dye forms a brown powder which, with warm water, gives a reddish-yellow solution, and with concentrated sulfuric acid an orange-brown solution.

   In a neutral liquor containing 1% salt, the new dye acetate silk dyes in orange-yellow tones.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen, wasserlöslichen ivlonoazofarbstoffes, dadurch gekennzeichnet, .dass man diazotiertes 2-Chlor- 4-nitranilin mit Phenyltaurin kuppelt. Der neue Farbstoff ist ein braunes Pulver, wel ches mit warmem Wasser eine rötlich-gelbe, mit konzentrierter .Schwefelsäure eine orange braune Lösung gibt. PATENT CLAIM: Process for the production of a new, water-soluble ivlonoazo dye, characterized in that diazotized 2-chloro-4-nitroaniline is coupled with phenyltaurine. The new dye is a brown powder, which gives a reddish-yellow solution with warm water and an orange-brown solution with concentrated sulfuric acid. Er färbt Acetatseide in orangegelben Tönen. He dyes acetate silk in orange-yellow tones.
CH189035D 1934-07-27 1935-07-22 Process for the preparation of a water-soluble monoazo dye. CH189035A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB189035X 1934-07-27
CH184307T 1935-07-22

Publications (1)

Publication Number Publication Date
CH189035A true CH189035A (en) 1937-01-31

Family

ID=25721009

Family Applications (1)

Application Number Title Priority Date Filing Date
CH189035D CH189035A (en) 1934-07-27 1935-07-22 Process for the preparation of a water-soluble monoazo dye.

Country Status (1)

Country Link
CH (1) CH189035A (en)

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