CH199786A - Process for the preparation of a new, water-soluble monoazo dye. - Google Patents

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

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Publication number
CH199786A
CH199786A CH199786DA CH199786A CH 199786 A CH199786 A CH 199786A CH 199786D A CH199786D A CH 199786DA CH 199786 A CH199786 A CH 199786A
Authority
CH
Switzerland
Prior art keywords
water
new
preparation
monoazo dye
soluble monoazo
Prior art date
Application number
Other languages
German (de)
Inventor
Limited Imperial Che Industrie
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 CH199786A publication Critical patent/CH199786A/en

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Description

  

  Verfahren zur Herstellung eines neuen, wasserlöslichen     Monoazofarbstoffes.       Die vorliegende Erfindung bezieht sich  auf ein Verfahren zur Herstellung eines  neuen, wasserlöslichen     Monoazofarbstoffes,     dadurch gekennzeichnet,     dass    der     diazotierte          Schwefelsäureester    des     p-Aminophenyl-ss-          oxy        äthyläthers    mit     p-Kresol    gekuppelt     wird.     



  Der neue Farbstoff ist ein gelbes Pulver;  das in Wasser eine gelbe und in konzentrier  ter Schwefelsäure eine rote Lösung gibt. Er  färbt     Acetatkunstseide        aus    wässeriger Lö  sung in     grünlich-gelben    Tönen.  



  <I>Beispiel:</I>       23g3    Teile des     ;Schwefelsäureesters    des  p -     Aminophenyl    -     ss    -     oxyäthyläthens,    welcher  durch Behandlung des p -     Aminophenyl-          ss    -     oxyäthyläthers    mit     Schwefelsäuremono-          hydrat    erhalten wurde, werden bei 10  bis 15   C, nach     iSuspension    in 300 Tei  len Wasser, .das 25 Teile 36%ige Salzsäure  enthält,

   durch Zufügung von 7 Teilen Na  triumnitrit     diazotiert.    Die so erhaltene Lö  sung der     Diazoverbindung    wird auf     5'C     gekühlt und dann zu einer     eiskalten    Lösung  von 10,8 Teilen     p-Kresol    in 300 Teilen  Wasser, dem 4 Teile     kaustische    Soda und    31 Teile     I,Tatriumkarbonat    zugefügt worden  waren, gegeben. Das Reaktionsgemisch     wird     stets gekühlt und bis zur vollständigen Ver  bindung umgerührt.

   Hierauf wird es auf  <B>50'C</B> erwärmt, es werden 25 Teile gewöhn  liches Salz beigefügt, und der dadurch aus  gefällte Farbstoff wird dann     abfiltriert.    Der  Farbstoff kann als Paste aufbewahrt oder  auf die übliche Weise getrocknet werden.



  Process for the preparation of a new, water-soluble monoazo dye. The present invention relates to a process for the preparation of a new, water-soluble monoazo dye, characterized in that the diazotized sulfuric acid ester of p-aminophenyl-ss-oxy ethyl ether is coupled with p-cresol.



  The new dye is a yellow powder; which gives a yellow solution in water and a red solution in concentrated sulfuric acid. It dyes acetate silk from aqueous solution in greenish-yellow tones.



  <I> Example: </I> 23g3 parts of the sulfuric acid ester of p-aminophenyl-ss-oxyethylethens, which was obtained by treating the p-aminophenyl-ss-oxyethylether with sulfuric acid monohydrate, are at 10 to 15 ° C. after suspension in 300 parts of water containing 25 parts of 36% hydrochloric acid,

   diazotized by adding 7 parts of sodium nitrite. The solution of the diazo compound thus obtained is cooled to 5 ° C. and then added to an ice-cold solution of 10.8 parts of p-cresol in 300 parts of water, to which 4 parts of caustic soda and 31 parts of sodium carbonate have been added. The reaction mixture is always cooled and stirred until it is completely bonded.

   It is then heated to <B> 50'C </B>, 25 parts of common salt are added, and the color that precipitates out is then filtered off. The dye can be stored as a paste or dried in the usual way.

 

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung eines neuen, wasserlöslichen Monoazofarbstoffds,dadurch geliiennzeiehnet"dass der diazotierte Schwefel säureester des p-Aminophenyl-ss-oxyäthyl- äthers mit p-Kresol gekuppelt wird. Der neue Farbstoff ist ein gelbes Pulver, das in Wasser eine gelbe und in konzentrier ter Schwefelsäure eine rote Lösung gibt. Er färbt Acetatkunsts.eide aus wässeriger Lösung in grünlich-gelben Tönen. PATENT CLAIM: Process for the production of a new, water-soluble monoazo dye, thereby geliiennzeiehnet "that the diazotized sulfuric acid ester of p-aminophenyl-β-oxyethyl ether is coupled with p-cresol. The new dye is a yellow powder, which in water a yellow and A red solution in concentrated sulfuric acid colors acetate artificial silk from aqueous solution in greenish-yellow tones.
CH199786D 1935-12-05 1936-11-18 Process for the preparation of a new, water-soluble monoazo dye. CH199786A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB199786X 1935-12-05

Publications (1)

Publication Number Publication Date
CH199786A true CH199786A (en) 1938-09-15

Family

ID=10138304

Family Applications (1)

Application Number Title Priority Date Filing Date
CH199786D CH199786A (en) 1935-12-05 1936-11-18 Process for the preparation of a new, water-soluble monoazo dye.

Country Status (1)

Country Link
CH (1) CH199786A (en)

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