CH194954A - Process for the preparation of a new monoazo dye. - Google Patents

Process for the preparation of a new monoazo dye.

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Publication number
CH194954A
CH194954A CH194954DA CH194954A CH 194954 A CH194954 A CH 194954A CH 194954D A CH194954D A CH 194954DA CH 194954 A CH194954 A CH 194954A
Authority
CH
Switzerland
Prior art keywords
preparation
monoazo dye
yellow
new 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 CH194954A publication Critical patent/CH194954A/en

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Description

  

      Terfahren    zur Herstellung     eines    neuen     Nonoazofarbatoffes.       Vorliegende Erfindung     betrifft    die Her  stellung eines neuen     Monoazofarbstoffes,    wel  cher Wolle in rein gelben Tönen färbt, die  sehr gute Beständigkeit gegen intensives  Waschen, Walken und Licht aufweisen.  



  Gemäss vorliegendem Verfahren wird der  Farbstoff hergestellt durch Kuppeln von     di-          azotiertem        Dodecyl-3-amino-4-methoxy-l-ben-          zoat    mit     1-(4'-Sulfophenyl)-3-methyl-5-pyr-          azolon.     



       Beispiel:     Eine Suspension von 33,5 Gewichtsteilen       Dodecyl-3-amino-4-methoxy-l-benzoat    in 250  Gewichtsteilen Wasser und 26 Gewichtsteilen  36     0%iger    Salzsäure wird durch Zugabe von  6,9 Gewichtsteilen     Natriumnitrit        diazotiert.     Die Lösung der     Diazoverbindung    wird nötigen  falls filtriert und hierauf zu einer gekühlten,  wässerigen Lösung (5 0 C) von 25,4 Gewichts  teilen     1-(4'-Sulfophenyl)-3-methyl-5-pyrazolon     gesetzt, die 15     0%    Kochsalz      i'rewicht    für Vo  lumen)

   enthält und während des     Zusetzens     mittels Soda gegen Lackmus alkalisch ge  halten wird. Die Kupplungsreaktion verläuft  rasch. Nachdem sie beendet ist, erhitzt man    das Gemisch auf<B>500</B> C, filtriert den Farb  stoff ab und trocknet ihn auf irgendeine ge  eignete Weise. Der neue Farbstoff stellt ein       rötlichgelbes    Pulver dar, das mit heissem  Wasser eine seifige, gelbe Lösung bildet und  sich in konzentrierter Schwefelsäure mit gelber  Farbe löst.

   Er gibt auf Wolle rein gelbe Töne,       die        bei        Anwendung        eines        2%        Ammonacetat     enthaltenden Farbbades intensivem Waschen,  Walken und Licht sehr     zut    widerstehen.



      The process of producing a new nonoazo carbate. The present invention relates to the manufacture of a new monoazo dye which dyes wool in pure yellow tones which have very good resistance to intensive washing, fulling and light.



  According to the present process, the dye is prepared by coupling dodecyl 3-amino-4-methoxy-1-benzoate with diacotized dodecyl with 1- (4'-sulfophenyl) -3-methyl-5-pyrazolone.



       Example: A suspension of 33.5 parts by weight of dodecyl 3-amino-4-methoxy-1-benzoate in 250 parts by weight of water and 26 parts by weight of 360% hydrochloric acid is diazotized by adding 6.9 parts by weight of sodium nitrite. The solution of the diazo compound is filtered if necessary and then added to a cooled, aqueous solution (5 ° C.) of 25.4 parts by weight of 1- (4'-sulfophenyl) -3-methyl-5-pyrazolone, the 15% sodium chloride i'weight for volume)

   and is kept alkaline against litmus during the addition of soda. The coupling reaction is rapid. When it is finished, the mixture is heated to <B> 500 </B> C, the dye is filtered off and dried in any suitable way. The new dye is a reddish yellow powder that forms a soapy, yellow solution with hot water and dissolves in concentrated sulfuric acid with a yellow color.

   It gives pure yellow tones on wool, which are very resistant to intensive washing, tumbling and light when using a dye bath containing 2% ammonium acetate.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen Monoazofarbstoffes, dadurch gekennzeichnet, dass man Dodecyl-3-amino-4-methoxy-l-ben- zoat diazotiert und die Diazoverbindung mit 1-(4'-Sulfophenyl)-3-methyl-5-pyrazolon kup pelt. Das Produkt ist ein rötlichgelbes Pulver, das mit heissem Wasser eine seifige, gelbe Lösung, mit konzentrierter Schwefelsäure eine gelbe Lösung gibt und Wolle in rein gelben Tönen färbt. Claim: Process for the preparation of a new monoazo dye, characterized in that dodecyl 3-amino-4-methoxy-1-benzoate is diazotized and the diazo compound is diazotized with 1- (4'-sulfophenyl) -3-methyl-5-pyrazolone coupling. The product is a reddish-yellow powder that gives a soapy, yellow solution with hot water and a yellow solution with concentrated sulfuric acid and dyes wool in pure yellow tones.
CH194954D 1935-11-21 1936-11-05 Process for the preparation of a new monoazo dye. CH194954A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB194954X 1935-11-21
CH191569T 1936-11-05

Publications (1)

Publication Number Publication Date
CH194954A true CH194954A (en) 1937-12-31

Family

ID=25722147

Family Applications (1)

Application Number Title Priority Date Filing Date
CH194954D CH194954A (en) 1935-11-21 1936-11-05 Process for the preparation of a new monoazo dye.

Country Status (1)

Country Link
CH (1) CH194954A (en)

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